SITENO_COMBINED	DEPOSIT_NAME	MAP_ROW	MAP_COL_	NO_IN_SECTION	LATITUDE_DMS	LONGITUDE_DMS	LATITUDE_DD	LONGITUDE_DD	LATITUDE_DM	LONGITUDE_DM	DEPOSIT_TYPE	COMMODITIES_MAJOR	COMMODITIES_MINOR	GRADE_TONNAG	BELT_METALLOGENIC	REFERENCES	SUMMARY	COUNTRY

K52-01	Slavyanovskoe	K	52	01	42 53 35N	130 53 47E	42.8930555555556	130.896388888889	4254'N	13054'E	As quartz vein	As		Small.	Laoelin	A.F. Frizh, written commun., 1932; N.E. Gritsenko, written commun., 1958; V.V. Ratkin, this study.	Consists of a series of north-south-striking, elongate quartz veins hosted in Paleozoic (Silurian?) mica-graphite schist and metasandstone.  Quartz veins, up to 4 to 5 m thick, can traced for several hundred m.  Arsenopyrite is the dominant ore mineral, and occurs both as disseminations and as lenticular accumulations in quartz.  Minor galena also occurs  Lenses of sphalerite also occur conformable to  bedding of the metasedimentary rocks. The genesis of the deposit is questionable. Vein formation is interpreted as related to Cretaceous accretion and associated metamorphism of Paleozoic island arc volcanic and associated sedimentary rocks.  	Russia

K53-01	Skalistoe	K	53	01	43 36 00N	133 44 56E	43.6	133.748888888889	4336'N	13345'E	Porphyry Mo   	Mo	W	Small. Average grade of 0.02-0.2% Mo,  0.15-2.8% W2O3.	Samarka	Pokalov, 1972.	Consists of molybdenite, pyrite, and wolframite that occur as thin veinlets and small masses in lenticular quartz and quartz-sericite zones up to 10 m thick.  Local  chlorite-sericite alternation and some garnet-amphibole skarn.  Ore bodies are traced to a depth of 100 m. Deposit is hosted along contact of a hypabyssal stock of Paleogene granite porphyry and occurs both within and outside the pluton, between the country-rock and a miarolitic phase of the granite.  Granite porphyry intrudes Jurassic turbidite  deposits. 	Russia

K53-02	Nizhnee	K	53	02	43 36 31N	134 14 48E	43.6086111111111	134.246666666667	4337'N	13415'E	Sn polymetallic vein   	Sn, Pb, Zn		Small.  Average grade of 0.002-0.02% Pb; 0.33-1.53% Sn; 2.0% Zn.  Mined in 1970's.	Luzhkinsky 	Petrachenko, 1974.	Consists of Pb, Zn, Cu, and Fe sulfides and cassiterite that occur in the central parts of altered zones that contain tourmaline-chlorite-quartz and tourmaline-chlorite-quartz-hydrosericite alteration. Altered zones occur in mineralized fracture zones that are located along the margin of a caldera formed of intermediate composition, Late Cretaceous volcanic and interlayered volcanic-sedimentary rocks that exhibit intense propylitic and biotite alteration. 	Russia

K53-03	Shcherbakovskoe	K	53	03	43 35 04N	134 28 24E	43.5844444444444	134.473333333333	4335'N	13428'E	Polymetallic vein   	Pb, Zn	Sn	Small.  Average grade of 3-5% Pb;1-4% Sn;  2-9% Zn.  	Taukha	Radkevich and others, 1960.	Consists of northeast-trending, steeply-dipping, elongate (up to 300 m) veins, from 0.1 to 1.5 m thick  that occur in Early Cretaceous sandstone and siltstone.  Major ore minerals are sphalerite, galena, pyrrhotite, pyrite, and marcasite.  Gangue minerals are quartz and calcite.  Galena-sphalerite-pyrrhotite aggregates dominate and commonly occur along schistosity with pyrrhotite and sphalerite boudins coated by lenticular galena envelopes. Fractured sulfide ores are filled with sulfide-carbonate cement that contains jamesonite and secondary galena and sphalerite. Greisen-like cassiterite-bearing topaz-fluorite-mica veinlets cut sulfide ore.  No definite relationships between mineralization and granitic intrusions is observed. Deposit includes small bodies of pre-ore gabbro and felsic and andesitic dikes that are genetically related to Late Cretaceous volcanic rocks that surround the deposit.	Russia

K53-04	Fasolnoe	K	53	04	43 34 30N	134 42 08E	43.575	134.702222222222	4335'N	13442'E	Polymetallic vein   	Pb, Zn	Sn	Small.  Average grade of 0.1-30.0% Pb; 0.01-0.3% Sn; 0.1% Zn.	Taukha	Radkevich and others, 1960.	Consists of small en-echelon veins within a northwest-striking zone in a sequence of Upper Cretaceous (Cenomanian-Turonian) felsic volcanic rocks.  Ore minerals are magnetite, sphalerite, galena, pyrrhotite, pyrite, arsenopyrite, cassiterite, valleriite, and cubanite.  Host volcanic rocks are intensely altered to chlorite minerals with local garnet.  Magnetite and cassiterite are closely associated with chloritic alteration.	Russia

K53-05	Soyuz	K	53	05	43 24 59N	134 20 09E	43.4163888888889	134.335833333333	4325'N	13420'E	Au-Ag epithermal vein	Ag, Au		Small.  Average grade of 1.27 g/t Au; 127.9 g/t Ag.  	Taukha	E.D. Petrachenko, written commun., 1975.	Consists of veins, veinlet zones, and adularia-quartz, quartz, and mica-quartz bodies with sulfides and sulfosalts.  Gold occurs in a quartz-adularia-argentite-sulfosalt assemblage.  Quartz-sulfide veinlets lack gold.  Deposit  hosted by argillic-altered calc-alkalic, Late Cretaceous (88-65 Ma) rhyolite and related tuff.  Ore bodies occur along faults.  No relationship with intrusive rocks is observed.	Russia

K53-06	Benevskoe	K	53	06	43 05 48N	133 42 30E	43.0966666666667	133.708333333333	4306'N	13343'E	W skarn   	W		Small.  Average grade of 0.44 to 3.15% W2O3.	Samarka	V.D. Shlemchenko and others, written commun., 1983.	Consists of two zones containing skarn and hydrothermal alteration that contain approximately 30 ore bodies ranging from a few m to 200 m long and from 0.6 to 6 m thick.  Skarns consist of magnetite, garnet, pyroxene-garnet, garnet-epidote, and garnet-orthoclase types. Scheelite is dominant ore mineral, with minor magnetite, arsenopyrite, pyrite, and rare cassiterite.  Gangue minerals are quartz, feldspar, amphibole, epidote, biotite, and tourmaline.  Late stages alterations consist of quartz-sericite and zeolitie.Late-stage quartz-feldspar and quartz-amphibole overgrowths replace skarn and contain nest-like veinlets and disseminated ore minerals. Skarns occur in veins and lenses that are located along the contact of Early Cretaceous biotite alaskite, granite porphyry, and granodiorite. Granitic rocks intrude sandstone and siltstone that are part of a Middle and Late Jurassic accretionary wedge complex  is cut by numerous dikes of aplite, diorite and basalt porphyry, quartz diorite, granite porphyry, and granodiorite porphyry.  	Russia

K53-07	Krinichnoe	K	53	07	42 53 55N	132 28 45E	42.8986111111111	132.479166666667	4254'N	13229'E	Granitoid-related Au   	Au		Small.   Contains up to 2.8 g/t Au and up to 171 g/t Ag.  	Sergeevka	S.M. Rodionov, written commun., 1991.	Consists of gold-pyrite-quartz, and quartz-carbonate zones in a Late Cretaceous granitic pluton that intrudes metamorphosed Paleozoic volcanic and sedimentary rocks.  Sulfide-poor gold-pyrite-quartz occurs in ore bodies of variable shape and size.	Russia

K53-08	Askold	K	53	08	42 43 34N	132 20 02E	42.7261111111111	132.333888888889	4244'N	13220'E	Granitoid-related Au	Au		Medium.  Average grade of 5.9-7.6 g/t Au.  	Sergeevka	M.I. Efimova and others, written commun., 1971; Efimova and others, 1978.	Consists of a gold-quartz vein stockwork in a greisenized Mesozoic granite that intrudes Paleozoic volcanic and sedimentary rocks.  Deposit prospected to depths of more than 100 m.	Russia

K53-09	Balykovskoe	K	53	09	42 57 37N	132 57 18E	42.9602777777778	132.955	4258'N	13257'E	Granitoid-related Au	Au		Small   	Sergeevka	E.D. Petrachenko (this study).	Consists of:  (1) Ore-bearing thrust zones with gold-pyrite-quartz veins; and (2) quartz veins with galena, sphalerite, and silver.  Deposit  formed in two stages. Deposit occurs in Late Cretaceous granite that surrounds and intrudes early Cambrian gabbroic rocks of the Sergeevka Complex with a U-Pb age of 527 Ma (John N. Aleinikoff, written commun., 1985).  Fineness of gold is 600.	Russia

K53-10	Progress	K	53	10	42 52 18N	132 49 46E	42.8716666666667	132.829444444444	4252'N	13250'E	Granitoid-related Au	Au		Medium.  Average grade of 5.89 g/t Au.	Sergeevka	A.N. Rodionov, written commun., 1991.	Consists of sulfide-poor pyrite-arsenopyrite-gold-quartz veins, small veinlets, poorly mineralized fracture zones, zones of mylonite, and zones altered to metasomatic carbonate-chlorite-sericite rocks.  Deposit hosted in a Late Cretaceous granitic pluton that cuts a sequence of granitic-gabbro rocks of Sergeevka Complex with a Cambrian age of 500 to 527 Ma (J.N. Aleinikoff, wrtten commun., 1992).  The deposit is prospected to  depths of a few tens m.  This lode is also the source for nearby placer Au deposits.	Russia

K53-11	Porozhistoe	K	53	11	42 54 22N	133 27 47E	42.9061111111111	133.463055555556	4254'N	13328'E	Granitoid-related Au	Au		Small.  Average grade of 5.39 g/t Au.  	Sergeevka	I.I. Fatianov and others, written commun., 1988.	Consists of sulfide-poor gold disseminations and veins in cataclastic and schistose zones that occur in metamorphosed gabbroic rocks of the Cambrian Sergeevka Complex.  Main sulfide minerals are pyrite, pyrrhotite, and chalcopyrite.  Gangue minerals are quartz, biotite, sericite, chlorite, and carbonate minerals. Gold occurs as disseminations in chlorite-bearing gabbroic rocks and also as thin veins and veinlet networks. Deposit associated with Late Cretaceous granitic plutons in the area. 	Russia

K55-01	Golovninskoe	K	55	01	43 52 53N	145 36 18E	43.8813888888889	145.605	4353'N	14536'E	Sulfur-sulfide.	S, FeS		Small. Contains an estimated few tens of thousands tonnes averaging 10-25% S.	Kuril	Vlasov, 1977.	Consists of sulfur-bearing bodies, approximately 4 m thick and containing 20-25% S that are deposited at the floor of boiling lake in the caldera of Holocene Golovnin volcano, and near fumarolic vents at the foot of extrusive domes.  Sulfur ooze overlies sediments rich in melnikovite (FeS2, amorphous pyrite) and poor in sulfur (up to 10% S). Quaternary age of mineralization. 	Russia

L52-01	Komissarovskoe (Vorob'eva plad)	L	52	01	44 33 42N	131 27 15E	44.5616666666667	131.454166666667	4434'N	13127'E	Au-Ag epithermal vein   	Au, Ag		Small.  Average grade of 1.92 g/t Au and 49-52 g/t Ag. 	Laoelin-Grodekovsk	A.N. Rodionov, written commun., 1991.	Consists of low-grade gold-silver-pyrite and minor galena and sphalerite that occur in metasomatic sericite-biotite-quartz bodies, fracture zones, and short veins. Deposit hosted in dacitevolcanic rocks, presumably part of a Permian volcanic sequence.  Very low grade gold also occurs short quartz veins in an associated Permian sedimentary sequence, and are conformable to bedding, and are also folded and cross-cutting.  Mineralization occurred in areas of higher carbon contents in thin-bedded siltstone and argillite.	Russia

L52-02	Baikal	L	52	02	44 11 54N	131 06 01E	44.1983333333333	131.100277777778	4412'N	13106'E	Porphyry Cu-Mo   	Cu, Mo	Au	Small. Because the ore is highly oxidized,  a low Cu content of 0.01%.  Average grade of  about 0.01% Mo.	Laoelin-Grodekovsk	Petrachenko and Petrachenko, 1985.	Consists of veinlets and disseminations along contacts of gabbro-diorite and gabbro-syenite, both within and adjacent to the intrusive rocks. Deposit occurs in an area of 150-200 m2 in hydrothermally altered, biotite-K-feldspar rock that is surrounded by  epidote-chlorite propylitic alteration. Ore minerals are chalcopyrite, bornite, pyrite, and molybdenite. The hydrothermally altered areas exhibit anomalous gold. Host rocks are metamorphosed Silurian and Devonian sedimentary and siliceous volcanic rocks, and Permian(?), subalkaline, gabbro-diorite, gabbro-syenite, and granite porphyry that intrude the sedimentary sequence. The gabbro-diorite is highly alkaline, and the gabbro-syenite and granite porphyry that host the deposit are K-enriched. 	Russia

L52-03	Zolotoi Stream (Sofie-Alekseevskoe)	L	52	03	44 16 55N	131 23 44E	44.2819444444444	131.395555555556	4417'N	13124'E	Au quartz vein   	Au		Small.  Average grade of1.3 g/t Au; 5 g/t Ag.  	Laoelin	E.D. Petrachenko, written commun., 1985.	Consists of  zones of thin pyrite-gold-quartz veins, disseminated gold, and coarse-grained pyrite in volcanic rocks with chlorite and carbonate alteration with local course-grained pyrite. Deposit hosted in a Late Permian volcanic-sedimentary sequence. 	Russia

L53-01	Khvoshchovoe	L	53	01	47 58 28N	136 11 10E	47.9744444444444	136.186111111111	4758'N	13611'E	Porphyry Cu-Mo   	Cu, Mo		Small.  Average grade of 0.02 to 0.4% Cu, 0.01 to 0.20% Mo, 0.01 to 0.09% W.	Samarka	V.B. Shuvalov, written commun., 1986.	Consists of zones of veinlets and disseminations associated with intense metasomatic alteration composed of biotite, microcline, argillite, sericite, quartz, and carbonate.  Deposit hosted in a Cretaceous amphibole-biotite granodiorite and biotite granite that intrudes Jurassic sandstone and siltstone.  Intrusive and sedimentary rocks are crosscut by aplite, granodiorite porphyry, and diorite porphyry dikes presumably related to  porphyry Cu deposit. Ore minerals occur in all hydrothermally-altered rock  except carbonate.  Ore minerals are pyrite, chalcopyrite, molybdenite, scheelite, wolframite, magnetite, hematite, sphalerite, galena, and pyrrhotite. Deposit occurs in a 10 km2 circular structure around the granitic rocks.   	Russia

L53-02	Kafen	L	53	02	47 35 41N	136 15 27E	47.5947222222222	136.2575	4736'N	13615'E	Porphyry Cu-Mo   	Cu, Mo		Small.  	Samarka	V.P. Bredikhin, written commun., 1979.	Consists of linear zones of quartz alteration with disseminated sulfides that occur around numerous granitic apophyses.  Ore minerals are pyrite, chalcopyrite, and molybdenite. Ore veins occur at the margin of granitic body and partly in host rocks, within a zone of intense greizenization and silicification. Deposit surrounded by a sulfide aureole and hosted in granite and granodiorite porphyry that form part of  Early Cretaceous Khingan series with an earlier magmatic stage of dikes of gabbro-diorite.  Country rocks are Late Permian sandstone, siltstone, basalt, and basaltic tuff that are contact metamorphosed to hornfels.  	Russia

L53-03	Katenskoe	L	53	03	47 17 28N	136 12 57E	47.2911111111111	136.215833333333	4717'N	13613'E	Zoned mafic-ultramafic Ti  	Ti		Large   	Ariadny	Scheka and others, 1991.	Consists of disseminated ilmenite in pyroxene-hornblende gabbro and olivine gabbro of Early Cretaceous age.  Contains local lenticular bodies that several tens of meters thick and at least 1 km long.  	Russia

L53-04	Malakhitovoe	L	53	04	47 05 52N	135 04 20E	47.0977777777778	135.072222222222	4706'N	13504'E	Porphyry Cu-Mo   	Cu, Mo		Small.  Average grade of 0.1 to 1.6% Cu in stockwork and up to 0.5% Cu in breccia zone.	Samarka	Petrachenko and Petrachenko, 1985.	Occurs in a circular aureole of hydrothermally altered rocks with dimensions of 200 x 200 m over an intrusive dome.  Successive mineral assemblages are: (1) quartz-biotite-actinolite with pyroxene and epidote; ( 2) quartz-biotite-actinolite; ( 3) quartz-biotite-sericite ( chlorite); and (4) quartz-hydromica (with carbonate).  A stockwork contains the first three facies and consists of a thick network of quartz-epidote-actinolite veinlets and lenses up to 2-3 cm thick with chalcopyrite, bornite, and pyrite.  Heavily fractured and brecciated chert and siltstone were prospected by drill holes to the depth of 100 m.  Ore minerals in breccia  zones are chalcopyrite, bornite, molybdenite, pyrite, rarely pyrrhotite, cubanite, arsenopyrite, galena, and sphalerite.  Carbonate veinlets with chalcopyrite also occur. Deposit occurs at northwest margin of a volcanic-tectonic depression that contains a lower structural stage of Early Cretaceous sandstone interlayered with siltstone and shale that grades upwards into conglomerate and sandstone that is overlain by Paleogene andesite and basaltic andesite lava and lava breccia.  Local intrusive rocks consist of dike-like bodies of calc-alkaline andesite porphyry, regarded as tongues of a dome-like subvolcanic intrusion. 	Russia

L53-05	Lermontovsky	L	53	05	46 56 44N	134 27 24E	46.9455555555556	134.456666666667	4657'N	13427'E	W skarn and greisen	W	Au	Large.  Average grade of 0.67-3% W2O3.  	Samarka	Gvozdev, 1984.	Consists of lenticular, sheeted, and nest-like skarn bodies that occur at the top of an Early Cretaceous granitic stock along contacts with bedded limestone.  Ore bodies range from 40-80 to 500-640 m long and 1 to 78 m thick.  Deposit was formed in three stages:  (1) skarn (diopside, hedenbergite, hornblende, wollastonite, and garnet) replacement of limestone and of biotite hornfels formed from sandstone; (2) hydrothermal alteration of granitic rocks, hornfels, and skarn to greisen; and (3) sulfide minerals.  Two types of greisen occur:  (1) quartz-albite-muscovite; and (2) scheelite-muscovite-apatite-mica-quartz.  Pyrrhotite dominates among sulfides; arsenopyrite, pyrite, marcasite, and scheelite are subordinate.  Sulfide minerals are either superimposed on scheelite-bearing greisen or occur separately in veins.  Deposit also contains silver-telluride-bismuth (polymetallic ore) and gold-telluride-bismuth (pyrrhotite ore) zones.  Tungsten occurs in all parts of deposit, although the largest accumulations of scheelite occur in muscovite and lesser biotite, and phlogopite greisen, quartz veins, and a metasomatic feldspathic rock.  Host Early Cretaceous granitic rocks are highly aluminous, low in alkalies and calcium, and contain elevated levels of fluorine and phosphorus.   	Russia

L53-06	Verkhnezolotoe	L	53	06	46 32 00N	136 25 49E	46.5333333333333	136.430277777778	4632'N	13626'E	Porphyry Cu	Cu, Sn	W, As, Zn	Small.  Average grade of 3 g/t Au, 86 g/t Ag, 0.35-2.27% Cu, 0.69% Pb, and 0.26% Sn.  	Luzhkinsky 	Orlovsky and others, 1988.	Occurs at the side of a volcanic-tectonic depression which is filled with trachyandesitic flows overlain by dellenite-rhyolite tuff and other extrusive rocks of Late Cretaceous (Turonian to Santonian) age.  Deposit are cut by dikes of andesite and basaltic porphyry, dacite, diorite stocks, and separate granodiorite porphyry dikes; all of which are parts of a Late Cretaceous volcano-plutonic complex.  A Cu stockwork is related to a diorite stock; stockwork boundaries coincide with the aureole of biotite alteration, which is overprinted by epidote-actinolite and chlorite-carbonate propylitic alteration that extends to periphery of stock.  Distribution of ore is irregular.  Disseminated ore locally contains rich ore in zones of heavily fractured rocks.  Chalcopyrite and marcasite are the dominant ore minerals, with minor sphalerite, galena, molybdenite, and cassiterite.  Richest ore is associated with tin, copper, and locally tungsten minerals.  Zone of oxidized ore up to 20-30 m deep caps the deposit.	Russia

L53-07	Vostok-2	L	53	07	46 28 03N	135 52 40E	46.4675	135.877777777778	4628'N	13553'E	W skarn   	W		Large.  Average grade of 0.65% Cu; 1.64% W2O3 .  Mined since 1980's.  	Luzhkinsky 	Stepanov, 1977; Rostovsky and others, 1987.	Consists of steeply-dipping skarn as veins and sheet-like bodies that occur at the contacts of a large olistolith of Carboniferous to Permian limestone which is in a matrix of Jurassic clastic rocks.  Some ore bodies fill fractures in the Jurassic clastic rocks.  Skarn also occurs in quartz-sericite hydrothermally altered rocks that envelope a plagiogranite-granodiorite stock.  Some skarn bodies occur wholly within intrusive rocks.  The deposit was formed in several stages.  An early stage consists mainly of pyroxene, plagioclase, amphibole, and garnet.  An intermediate stage altered both skarn and intrusive rocks and formed quartz-feldspar-muscovite (chlorite, biotite) greisen with scheelite, apatite, and minor arsenopyrite, pyrrhotite, and chalcopyrite.  A late stage of scheelite and quartz was succeeded by low temperature scheelite-arsenopyrite.  Plagiogranite dated at approximately 110 ma  by K-Ar isotopic studies; deposit is interpreted as about the same age.  	Russia

L53-08	Tigrinoe	L	53	08	46 05 19N	135 44 58E	46.0886111111111	135.749444444444	4605'N	13545'E	Sn-W greisen   	Sn, W, Ta, Nb, In	Mo, Zn, Bi	Medium. Average grade of 0.14% Sn and 0.045% W2O3, 	Luzhkinsky 	Korostelev and others, 1990; Gonevchuk and Gonevchuk, 1991.	Consists of a complex Sn-W deposit defined by: (1) a stockwork of quartz-topaz-micaceous greisen along the contact of a Li-F granite pluton; (2) a linear stockwork consisting of a thick network of veinlets (5-10 to 70 veinlets per meter) of parallel north-south-trending quartz-topaz veins from 3 to 100 cm thick. Veins are hosted in contact metamorphosed sedimentary rocks adjacent to the granite pluton; and (3) a sulfide breccia pipe containing rock fragments of the stockwork and greisen cemented by quartz with lesser carbonate, fluorite, and sulfides. Three stages of mineralization are distinguished: (1) early quartz-molybdenite-bismuthinite; (2) middle REE greisen of wolframite-cassiterite with high contents of Sc, Ni, and Ta; and (3) late hydrothermal quartz-fluorite-carbonate-sulfide veins. In, Cd, Ag, and Se are enriched in sulfides in the two last stages.  K-Ar age of the lithium-fluorine granite is 90 Ma  5%. 	Russia

L53-09	Yantarnoe	L	53	09	46 20 09N	136 33 56E	46.3358333333333	136.565555555556	4620'N	13634'E	Porphyry Sn   	Sn		Small.  Average grade of 0.1-2.17% Cu, 0.03-1.02% Pb, 7.3% Sn, and 0.7-2.22% Zn.	Luzhkinsky 	Rodionov, 1988.	Consists of veinlets and disseminations of cassiterite and sulfide minerals in a pipe-like body and in a volcanic breccia composed of trachyandesite and rhyolite that intrude Early Cretaceous clastic sedimentary rocks. Early mineralization was associated with rhyolite in the pipe-like body and volcanic breccia and produced mainly pyrite and chalcopyrite. The major part of deposit formed after the intrusion of explosive breccia of the deposit and consists of metasomatic quartz-chlorite, quartz-sericite, and quartz-chlorite-sericite alterations that contain a sulfide-free cassiterite-chlorite-quartz assemblage, and a Sn-polymetallic assemblage rich with galena, sphalerite, and chalcopyrite. Host igneous rocks are spatially related to Paleocene volcanic vents with K-Ar isotopic age of about 65 Ma. 

	Russia

L53-10	Zvezdnoe	L	53	10	46 10 23N	136 30 27E	46.1730555555556	136.5075	4610'N	13630'E	Porphyry Sn   	Sn	Cu, Pb, Zn	Small.  Average grade of 2.56% Pb; 0.53% Sn; 2.16% Zn.  	Luzhkinsky 	Rodionov, 1988.	Consists of a neck of Late Cretaceous(?) to Paleocene subvolcanic rhyolite with numerous (up to 40%) miarolitic cavities filled with a quartz-cassiterite aggregate.  Rhyolite altered to sericite and contains finely disseminated cassiterite.  Cassiterite-sulfide veins also occur in Early Cretaceous clastic rocks around the intrusion.  Galena and quartz-galena with cassiterite and stannite are dominant in the upper part of the deposit, and sphalerite-chalcopyrite-pyrrhotite with cassiterite ore predominate in deeper part of deposit.	Russia

L53-11	Salyut	L	53	11	46 22 00N	137 41 00E	46.3666666666667	137.683333333333	4622'N	13741'E	Au-Ag epithermal vein  	Au, Ag		Small.  Average grade of 1.75 g/t Au.  	Kema	A.N. Rodionov, written commun., 1983.	Consists of teeply-dipping veins and veinlets within alteration zones.  Veins range from 0.1 to 1.5 m thick; zones range from 0.3 to 40-50 m thick.  Deposit  formed in several stages including:  (1) sulfide-poor gold-pyrite-quartz, argentite-adularia-quartz veins; and (2)  sulfide-rich Cu polymetallic veins.  Major minerals are argentite, sphalerite, native silver and gold, quartz, adularia, fluorite, and chlorite, with subordinate galena, chalcopyrite, hematite, pyrargyrite, and acanthite.  Ore has high Ag and F content.  Hydrothermal alteration consists of hydromica-chlorite, chlorite-carbonate, and argillite.  Host rocks are Late Cretaceous to Paleogene felsic tuff, tuffite, and minor andesite.  Deposit presumably related to the extrusion of late-stage subalkaline rhyolite.	Russia

L53-12	Glinyanoe	L	53	12	46 11 00N	137 55 11E	46.1833333333333	137.919722222222	4611'N	13755'E	Au-Ag epithermal vein	Au, Ag		Small.  Average grade of 8.3 g/t Au, and 122 g/t Ag.	Kema	A.N. Rodionov, written commun., 1986.	Consists of adularia-quartz, sericite-chlorite-quartz, and carbonate-chlorite-quartz mineralized veins and zones that contain pyrite, arsenopyrite, galena, sphalerite, chalcopyrite, argentite, acanthite, silver tellurides, and native gold and silver. Veins and zones occur in altered, silicified volcanic rocks that overlie Late Cretaceous (Santonian) felsic volcanic rocks. Deposit  interpreted to have occurred in four stages: (1) gold-pyrite-quartz, (2) quartz-hydromica and quartz-carbonate, (3) gold-silver, and (4) quartz-chlorite-adularia with silver sulfosalts. Age of the deposit is interpreted as Late Cretaceous to Paleogene	Russia

L53-13	Nesterovskoe	L	53	13	46 03 50N	137 49 23E	46.0638888888889	137.823055555556	4604'N	13749'E	Porphyry Cu   	Cu	Mo, Ag	Small.  	Kema	Petrachenko and others, 1989.	Consists of a 50 x 200 m aureole of hydrothermally altered rocks in a mineralized stock.  Dominant alteration is quartz-sericite.  Ore minerals are pyrite, chalcopyrite, sphalerite, and molybdenite. Malachite occurs in oxidized zone.  Ag content increases with depth.  Deposit occurs in a fault zone cutting granodiorite and host rocks. Zone contains vein and disseminated Cu minerals. Ore occurs to  depths of several tens of m. Deposit occurs 6 km inland from the Sea of Japan in volcanic rocks cut by Late Cretaceous and Paleogene intrusions.  The area contains numerous andesite and dacite extrusions.	Russia

L53-14	Zabytoe	L	53	14	45 38 56N	135 25 04E	45.6488888888889	135.417777777778	4539'N	13525'E	W-Sn greisen   	W, Sn, Bi		Medium.  Average grade of 0.01-0.1% Sn; 0.01-12.61% W2O3.  	Luzhkinsky 	P.G. Korostelev and others, written commun., 1987; Gvozdev and others, 1990.	Consists of complex tin-bismuth-tungsten minerals related to a Late Cretaceous granitic stock.  The upper part of the stock consists of leucogranite with biotite granite and granite porphyry.  The lower part consists of granite and aplite which contain lithium micas with late-stage protolithionite and less abundant zinnwaldite.  Deposit consists of quartz veins from 3 to 15 m thick and metasomatic zones in granite greisen and hornfels.  Quartz-wolframite, quartz-sulfide, and quartz-carbonate stages are identified.  Quartz-wolframite stage consists of quartz, wolframite, molybdenite, beryl, cassiterite, and sulfides.  Quartz-sulfide ore consists of quartz-arsenopyrite-pyrrhotite-sphalerite and quartz-pyrite-sphalerite-galena with bismuth sulfosalts, bismuthine, and native bismuth.  Deposit contains high levels of Li and Rb.  Deposit is zoned with Ni-Rb-W minerals in the central portion of the stock and later-stage sulfide-tungsten ore at the periphery.  Mo and Be contents increase with depth.	Russia

L53-15	Zimnee	L	53	15	45 46 25N	135 57 40E	45.7736111111111	135.961111111111	4546'N	13558'E	Sn polymetallic vein   	Sn, Pb, Zn		Small.  Average grade of 0.1-3.0% Cu, 3.18% Pb, 0.59% Sn, and 4.09% Zn.	Luzhkinsky 	P.G. Korostelev and others, written commun., 1980; Nazarova, 1983.	Consists of mineralized breccia, breccia- and fracture-filling veins, zones of closely spaced veinlets, and pockets that occur in fracture zones. Sn polymetallic ore bodies have strike lengths up to 1200 m, extend extensvely down dip, and vary in thickness from several tenths of a meter to several tens of meters. Deposit occurs near a granodiorite body and contains mainly  pyrrhotite, pyrite, arsenopyrite, sphalerite, stannite, and cassiterite. Ore far from the granodiorite and in the upper part of veins is mostly galena with fine-grained cassiterite. Near the granodiorite, ore consists of breccia-bearing fragments of tin-sulfide minerals that are cemented by a quartz-micaceous (greisen) aggregate with arsenopyrite and cassiterite. The K-Ar age of altered rocks associated with the Sn-polymetallic ores is 75 Ma. Age of greisen assemblage is approximately 50 Ma as determined by K-Ar isotopic study of the granodiorite. The deposit exhibits regional metamorphism and cataclasis. 	Russia

L53-16	Dalnetayozhnoe	L	53	16	45 39 51N	136 07 55E	45.6641666666667	136.131944444444	4540'N	13608'E	Sn polymetallic vein   	Sn, Pb, Zn		Small.  Average grade of1.53% Pb; 0.53% Sn; 2.58% Zn.  	Luzhkinsky 	P.G. Korostelev and others, written commun., 1980.	Consists of mineralized fracture zones that contain irregularly distributed veinlets, pockets, and disseminations in Lower Cretaceous flyschoid sandstone and siltstone.  About 30 ore bodies occur in north-south-trending fracture zones, possibly up to 1 km long.  Dominant ore minerals are pyrrhotite, pyrite, sphalerite, stannite, and cassiterite, with minor galena, chalcopyrite, and arsenopyrite.  Gangue minerals are quartz, carbonates, chlorite, and sericite.	Russia

L53-17	Tayozhnoe	L	53	17	45 29 46N	136 39 28E	45.4961111111111	136.657777777778	4530'N	13639'E	Ag epithermal vein	Ag	Au	Medium.  Average grade of 50-2000 g/t Ag and 1 g/t Au.  Mined since 1980's.  	Kema	A.N. Rodionov and others, written commun., 1976; Logvenchev and others, in press.	Consists of steeply-dipping quartz veins that occur along northwest to north-south fractures  that cut coarse-grained, Early Cretaceous sandstone.  Veins are 100 to 500 m long and 0.5 to 2 m thick, and also occur laterally under the contact between sandstone and overlying 50-m-thick section of Late Cretaceous felsic volcanic rocks.  Ore minerals occur within the veins, and in metasomatic zones  along the sub-horizontal contact between veins and overlying volcanic rocks. Major Ag-bearing minerals are Ag sulfosalts and sulfides.  Pyrite and arsenopyrite are rare and formed before Ag-bearing minerals. In the upper part of veins, Ag occurs in tetrahedrite, freibergite, stephanite, pyrargyrite, and polybasite.  At middle depths, Ag occurs in acanthite and stephanite dominate, along with argentopyrite and allargentum also occur.  Acanthite dominates at depth.  Deposit assumed to be related to a Paleocene rhyolite volcano-plutonic assemblage.  	Russia

L53-18	Ussuri deposits	L	53	18	45 18 06N	133 37 41E	45.3016666666667	133.628055555556	4518'N	13338'E	Ironstone	Fe		Small.  Average grade of 23.8-38.6% Fe.  	Kabarga	Denisova, 1990.	Consists of a group of deposits with sheeted magnetite and hematite-magnetite bodies that occur in Early Cambrian clastic-carbonate rocks that overlie Early Cambrian dolomite.  Iron ore occurs in chert and interlayered quartz-sericite-chlorite, quartz-sericite schist, and dolomite and along chert contacts.  Upper part of ore-bearing zone is oxidized, and manganese ore (dominantly pyrolusite) occurs  in oxidized zone in addition to iron ore.  Mineralogic and geochemical studies suggest an exhalative-sedimentary origin.	Russia

L53-19	Ariadnoe	L	53	19	45 12 31N	134 27 45E	45.2086111111111	134.4625	4513'N	13428'E	Zoned mafic-ultramafic Ti  	Ti	Pt	Large.  Average grade of 1.0-11.8% TiO2; 0.086% V2O5.  	Ariadny	Scheka and Vrzhosek, 1985.	Consists of abundant disseminated ilmenite  that occurs in layers in pyroxene-hornblende gabbro and pyroxenite layered intrusions. Ilmenite layers are several tens of m thick and several hundred m long.  K-Ar isotopic age of  160 to 170 Ma for ore-bearing intrusions. Ilmenite contains rare platinoid inclusions.	Russia

L53-20	Skrytoe	L	53	20	45 05 02N	134 35 05E	45.0838888888889	134.584722222222	4505'N	13435'E	W skarn   	W		Small.  Average grade of 0.1-0.88% W2O3.  	Samarka	V.I. Gvozdev and others, written commun., 1988.	Scheelite occurs in: (1) zones of quartz-epidote-feldspar hydrothermally altered rocks; zones range from several cm to several m thick; and (2) feldspar-quartz veins in skarn and hornfels.  Skarn types are amphibole-plagioclase, garnet, pyroxene-plagioclase, and wollastonite.  Ore zones and veins occur as sheets and consist of quartz, epidote, feldspar, chlorite, sericite, calcite; and rarely apatite, prehnite, fluorite, sphene, pyrrhotite, arsenopyrite, sphalerite, and scheelite skarn.  Scheelite is concentrated in quartz-chlorite-sericite zones.  Feldspar-quartz veins contain scheelite, arsenopyrite, and apatite; as well as minor amounts of tourmaline, pyrrhotite, bismuthinite, native bismuth, and fluorite.  Quartz-pyrite veinlets with calcite and chlorite cut the tungsten zones and veins.  Thin veins of quartz-muscovite greisen occur to a depth of approximately 230 m.  Age of deposit unknown, probably Early Cretaceous, and similar to Vostok 2, Lermontovsky, and Benevskoe deposits. Host rocks are Jurassic siltstone and sandstone, Paleozoic chert, spilite, and limestone.  	Russia

L53-21	Malinovskoe	L	53	21	45 08 11N	135 02 12E	45.1363888888889	135.036666666667	4508'N	13502'E	Porphyry Cu   	Cu	Au	Small.  Average grade of 0.6-12.9 g/t Au;  0.42-4.5% Cu.	Luzhkinsky 	Petrachenko and others, 1991.	Deposits consists of veinlet and disseminated minerals in syenite. Ore minerals are chalcopyrite, pyrite, pyrrhotite, marcasite, arsenopyrite, gold, bismuthinite, glaucodot, and sphalerite; with minor argentite, freibergite, galena, cinnabar, and enargite.  Scheelite and wolframite occur locally.  Chalcopyrite content in veins decreases and arsenopyrite increases with depth. Mineralization occurs in several phases. Locally, veinlets and disseminated copper minerals associated with quartz-sericite alteration.  Epidote-chlorite-carbonate propylitic alteration is widespread in the area.  Host rocks altered to quartz-sericite rock.  Au-sulfide mineralization  younger than Cu mineralization and is associated with biotite-K-feldspar propylitic and sericitic alteration.  Cu veins occur along contacts both within and outside the intrusive complex.  Quartz-sulfide veins and lenses have variable thickness. Deposit occurs in syenite and monzodiorite that are part of a small intrusive complex of Late Cretaceous (Cenomanian-Turonian) gabbro-diorite, monzodiorite, and syenite intruded into fractures in Early Cretaceous sedimentary rocks.  Country rocks are contact metamorphosed, although intrusive contacts are mostly tectonic.  Associated monzodiorite exhibits K-feldspar and biotitie alteration. Intrusive rocks are of calc-alkaline and subalkaline series with high alumina content. 	Russia

L53-22	Yuzhnoe	L	53	22	44 44 49N	135 21 11E	44.7469444444444	135.353055555556	4445'N	13521'E	Polymetallic vein   	Pb, Zn, Ag	Sn, Cd	Medium.  Average grade of 349 g/t Ag; 6.78% Pb; 0.95% Sb; 0.16-1.2% Sn; 9.8% Zn.  Mined for Ag from 1970's to present.  	Luzhkinsky 	Vasilenko and Strizhkova, 1987.	Main vein occurs in a syncline in Early Cretaceous biotite siltstone intercalated with coarse-grained sandstone.  Vein ranges from 0.5 to 1.4  m thick, has been traced for 1.6 km, and prospected to the depth of 900 m.  Ore contains Zn, Pb, Ag, Cd, and Bi minerals.  Sn occurs at deep levels.  Three major ore-bearing assemblages occur:  (1) axinite-pyroxene-garnet;  (2) quartz-sulfide; and  (3) carbonate-silicate-sulfide. From top downward, vertically zoned mineral assemblages these:  (1) sulfosalt-sulfide (Sb-Pb-Ag),  (2) sulfide (galena-sphalerite-pyrrhotite),  (3) quartz-arsenopyrite with hexagonal pyrrhotite, and chalcopyrite and cassiterite.  At deep levels of the eastern flank of the ore body is a Sn-polymetallic deposit (Sn-Ag-Pb).  Deposit related to a subalkaline monzonite-diorite stock with K-Ar isotopic age of 75 to 98 Ma.  Veins cut the stock and  the sedimentary rocks hosting stock.  	Russia

L53-23	Zarechnoe	L	53	23	44 39 29N	134 39 00E	44.6580555555556	134.65	4439'N	13439'E	Porphyry Cu   	Cu		Small.  Average grade of 0.05 g/t Au; 0.02-0.9% Cu.	Luzhkinsky 	Petrachenko and Petrachenko, 1985.	Occurs in a 400 x 800 m elongate stockwork that is spatially related to fractured andesite flows.  Deposit exhibits intense propylitic alteration (actinolite, epidote, biotite, and chlorite) with fine veinlets, disseminations, and small pockets of chalcopyrite, chalcocite, bornite, cuprite, pyrite, and arsenopyrite. Deposit occurs in a Late Mesozoic andesite-trachyandesite volcanic sequence in the Central Fault zone that occurs between the Samarka and Zhuravlevsky terranes.  	Russia

L53-24	Smirnovskoe	L	53	24	44 38 04N	135 19 59E	44.6344444444444	135.333055555556	4438'N	13520'E	Polymetallic vein   	Pb, Zn, Sn	Ag	Medium.  Average grade of 69 g/t Ag, 2.69% Pb, 0.41% Sn, 3.52% Zn.  Mined for Ag from 1950's to about 1993.  	Luzhkinsky 	Vasilenko and Strizhkova, 1987.	Consists of (1) cassiterite and sulfide minerals in shear zones, and (2) quartz vein and greisen.  Cassiterite and sulfide minerals occur in a series of en echelon shear zones along a regional fault.  Host rocks are weakly propylitized Early Cretaceous (Valanginian) flysch.  Shear zones range from 0.5 to 2.10 m thick, are up to 2 km long, and extend down dip at least  960 m.  In addition to Zn, Pb, and Sn, deposit contains lesser Ag, In, and Cd.  A  zonal succession of mineral assemblages, from top downwards, consists of:  (1) carbonate-sulfosalt-sulfide; (2) quartz-sulfide; (3) quartz-arsenopyrite-cassiterite; and (4) pyrrhotite.  K-Ar isotopic age of 80 Ma on nearby intrusive monzonite interpreted as age of deposit. Quartz vein and greisen consists of metasomatic quartz-muscovite and quartz-topaz-fluorite zones and veins with Pb and Zn sulfides, and cassiterite.  Zones range up to  6 m widith in cavities.  K-Ar isotopic age of 45 to 60 Ma for greisen.  Formation of greisen related to a complex of small high-K monzonite-diorite intrusions at Yushnoe.	Russia

L53-25	Vysokogorskoe	L	53	25	44 20 48N	135 10 00E	44.3466666666667	135.166666666667	4421'N	13510'E	Sn silicate-sulfide vein   	Sn		Medium.  Average content of 1.0% Sn.  Mined from 1960's to present.  Largest mine in Kavalerova area.  	Luzhkinsky 	Litavrina and Kosenko, 1978; Ryabchenko, 1983.	Consists of quartz-chlorite-cassiterite, quartz-sulfide-cassiterite, and sulfide-cassiterite veins and mineralized fracture zones in Early Cretaceous olistostrome partially overlain by Late Cretaceous felsic volcanic rocks.  Sn mineralization related to the areas of quartz-tourmaline alteration about 5-6 m thick.  Average thickness of veins and mineralized zones is 1.2 to 1.4 m, with lengths of 400 to 500 m.  Ore traced to a depth of 700 m.  In addition to cassiterite, deposit contains chalcopyrite, arsenopyrite, pyrrhotite; and rarely galena and sphalerite.  Sulfosalts of bismuth and silver are common.	Russia

L53-26	Partizanskoe (Soviet 2, Svetliy Otvod)	L	53	26	44 25 19N	135 29 52E	44.4219444444444	135.497777777778	4425'N	13530'E	Pb-Zn skarn   	Pb, Zn	Ag	Medium.  Average grade of 67.6 g/t Ag; 1.5-3% Pb; 0.6-4% Zn.  Mined from 1950's to present.  	Taukha	Ratkin, Simanenko, and Logvenchev, 1991.	Consists of numerous, small, steeply-dipping skarn bodies at the contact of a Triassic limestone olistolith encased in Early Cretaceous clastic rocks. Skarns merge and form a single deposit  about 400 m below the surface, and pinch out at a depth of approximately 600 m. Ore and skarn assemblages are vertically zoned; higher temperature assemblages occur deeper. Massive, densely disseminated silver-lead-zinc ore (Pb/Zn about 1.0) occurs above quartz-calcite aggregate in the upper part of ore body. Massive, densely disseminated lead-zinc ore (Pb/Zn about 0.8) is associated with Mn-hedenbergite skarn and occurs at middle depths. And disseminated zinc ore (Pb/Zn about 0.5) occurs in ilvaite-garnet-hedenbergite skarn in the lower part. Galena and sphalerite are dominant ore minerals; chalcopyrite and arsenopyrite are common; minor magnetite, pyrrhotite, and marcasite also occur. Silver-bearing minerals are sulfosalts of Ag and Sb in the upper part of the deposit and galena in the lower part.  Galena contains silver as a solid solution of matildite. The age of mineralization is bracketed between 60 and 70 Ma by basalt dikes, with K/Ar isotopic ages of 60-70 Ma, that cut the ore body at the contact of olistolith, and by the lower part of the overlying volcanic strata, with  K/Ar ages of 70-80 Ma, which are cut by ore body. The deposit consists of four or more related ore bodies that occur over about 5 km strike length, including the Soviet 2, Partizansk East, Partizansk West, and Svetliyotvod ore bodies. The underground workings for this group of deposits have a total length of about 11 km. 	Russia

L53-27	Dalnegorsk	L	53	27	44 28 41N	135 34 54E	44.4780555555556	135.581666666667	4429'N	13535'E	Boron skarn  	B		World class.  Mined from 1970's to present.  Produces over 90% of all borates in Russia.  	Taukha	Ratkin, 1991; Ratkin and Watson, 1993; P.Layer, V.Ivanov, and T.Bundtzen, written commun., 1994.	Deposit occurs as a thick skarn zone formed in a large, upturned olistolith of bedded Triassic limestone enclosed in Early Cretaceous clastic sedimentary rocks. The skarn extends to a depth of approximately 1 km, where it is cut off by a granitic intrusion. Skarn formed in two stages, with second-stage skarn over-printing earlier skarn. The two stages of skarn formation are separated in time by the intrusion of intermediate-composition magmatic bodies (with approximate K/Ar ages of 70 Ma). The first stage consists of grossular-wollastonite skarn and concentrically zoned, finely banded aggregates with numerous finely crystalline datolite and druse-like accumulations of danburite crystals in paleohydrothermal cavities. The second stage skarn consists predominantly of long, radiated hedenbergite and andradite with coarsely-crystalline datolite, danburite, quartz, axinite, and calcite. An Ar-Ar age for orthoclase indicates the  age of the late-stage skarn assemblage is 57 Ma. The silicate mineralogy of the skarns is similar to that in lead-zinc skarn deposits in this same region. B isotopic studies indicate a magmatic source for boron (Ratkin and Watson, 1993). The deposit is very large and had been mined from 1970's to present. The Dalnegorsk open-pit mine is prospected to the depth of 1 km. The silicate mineralogy of the skarns is similar to that in lead-zinc skarn deposits in this same region.	Russia

L53-28	Nikolaevskoe	L	53	28	44 35 18N	135 39 51E	44.5883333333333	135.664166666667	4435'N	13540'E	Pb-Zn Skarn   	Pb, Zn	Ag	Medium. Average grade of 62 g/t Ag; 1.5-8.7% Pb; 1.36-10.5% Zn.  Mined from 1970's to present.  Main shaft about 500 m deep.  	Taukha	Garbuzov and others, 1987; V.V. Ratkin, this study.	Consists of large, layered ore bodies formed in a giant olistolith of Triassic limestone that is part of an Early Cretaceous accretionary-fold complex. The skarn occurs at the contacts of limestone with hosting siltstone and sandstone, and with overlying felsic volcanic rocks of a Late Cretaceous to Paleogene post accretionary sequence. Small ore bodies also occur in limestone blocks in the volcanic rocks that were torn off the underlying basement. The ore minerals are dominantly galena and sphalerite that replace an earlier hedenbergite skarn near the surface, and, at depth, replace a garnet-hedenbergite skarn. Subordinate ore minerals are chalcopyrite, arsenopyrite, pyrite, pyrrhotite, fluorite, and silver sulfosalts. K/Ar isotopic studies indicate that the age of mineralization bracketed between 60 and 80 Ma. A 60 K/Ar Ma isotopic age is obtained for an unmineralized basalt dike that cuts the mineralized zone, and a K/Ar age of 70-80 Ma is obtained for a mineralized ignimbrite that overlies the olistolith. .  	Russia

L53-29	Plastun	L	53	29	44 38 53N	136 12 23E	44.6480555555556	136.206388888889	4439'N	13612'E	Porphyry Cu   	Cu		Small.  Associated skarn contains 30-350 g/t Ag; 0.3-0.8% Cu.	Taukha	Mikhailov, 1989.	Consists of veinlets and disseminations from 100 to 150 m thick, with sulfide-bearing zones from 15 to 20 m thick.  Ore minerals are pyrite and chalcopyrite, with subordinate arsenopyrite, sphalerite, and galena.  Deposit hosted in Upper Cretaceous (Cenomanian-Turonian) felsic volcanic rocks.  Alteration consists of chlorite, epidote, quartz, and sericite.  Deposit occurs at the flank of caldera filled with Upper Cretaceous to Paleocene (Maastrichtian-Danian) volcanic rocks.  Underlying sedimentary rocks of the Early Cretaceous accretionary-fold complex include lenticular skarns up to 10 m long and 1.0 to 1.5 m thick with disseminated magnetite, chalcopyrite, pyrite, and pyrrhotite.  	Russia

L53-30	Koksharovskoe	L	53	30	44 27 38N	134 08 07E	44.4605555555556	134.135277777778	4428'N	13408'E	Zoned mafic-ultramafic Ti 	Ti	P	Large.  Average grade of 1.0-10% P2O5; 3.3-4.5% TiO2.  	Ariadny	Scheka and others, 1991.	Consists of disseminated ilmenite, magnetite, and apatite in a hornblende and biotite pyroxenite with a K-Ar isotopic age of 160 Ma.  Minor PGE present.  Intrusive rocks are weathered.  Weathered pyroxenite may have economic concentrations of vermiculite.	Russia

L53-31	Arsenyevsky	L	53	31	44 25 26N	134 47 14E	44.4238888888889	134.787222222222	4425'N	13447'E	Sn silicate-sulfide vein   	Sn	Pb, Zn, W, Ag	Medium.  Average grade of 2-3% Sn. Locally up to 20-25% Sn,  Also contains from 0.1-0.5% WO3 , 1-2% Pb and Zn ,  and a few hundred ppm Ag.  Mined since 1970's. 	Luzhkinsky 	Rub and others, 1974; Radkevich and others, 1980.	Deposit consists of a series of parallel, steeply-dipping Sn quartz veins up to 1000 m along strike and 600-700 m down dip.  Veins are commonly 10 to 20 cm thick, with maximum thickness of 1 to 2 m.  Ore mineral assemblages are vertically zoned.  From the top downwards assemblages are:  (1) quartz-cassiterite; (2) quartz-arsenopyrite-pyrrhotite; (3) polymetallic; and (4) arsenopyrite-pyrrhotite.  Late-stage alteration consists of quartz-fluorite-carbonate, with sizable amounts of huebnerite.  Deposit associated with 60 Ma rhyolite dikes that exhibit quartz-sericite autometasomatism, with local miarolithic cavities filled with cassiterite.	Russia

L53-32	Khrustalnoe	L	53	32	44 28 08N	134 58 45E	44.4688888888889	134.979166666667	4428'N	13459'E	Sn silicate-sulfide vein   	Sn	Pb, W, Ag	Medium.  Average grade of 0.8-1.7% Pb; 0.22% Sn; up to 11.8% Zn.  Mined during 1950's and 1960's.  	Luzhkinsky 	Radkevich and others, 1980.	Deposit consists of 70 to 80 steeply-dipping ore veins with dominantly north-south and northwest trends.  Veins extend for up to 1 to 3 km along strike and up for 500 to 600 m down dip; with an average thickness of 0.15 to 0.20 cm.  The major mineral assemblages occur in a zonal pattern.  At deep levels are quartz-cassiterite and early quartz-sulfide with arsenopyrite, pyrrhotite, chalcopyrite, sphalerite, and stannite.  At shallow levers are late-stage quartz-sulfide containing galena and sphalerite.  Tourmaline alteration of wall rock occurs at deep levels, and chlorite alteration occurs at shallow levels.  	Russia

L53-33	Krasnogorskoe	L	53	33	44 24 00N	135 58 02E	44.4	135.967222222222	4424'N	13558'E	Polymetallic vein   	Pb, Zn	Ag	Medium.  Average grade of 62 g/t Ag, 5 % Pb, 0.26 % Sn, and 6.77 % Zn.	Taukha	Ratkin and others, 1990.	Consists of steeply-dipping quartz-sulfide veins, up to several hundred m length along strike and from 0.2 to 1.5 m thick, that cut a sequence of Late Cretaceous (Cenomanian to Turonian) ash flow tuffs. Sphalerite and galena are the dominant ore minerals; the flanks of veins contain pyrite-marcasite-pyrrhotite, with lesser antimony-silver sulfosalts. At the deeper levels of the ore bodies, galena contains up to several percent silver and bismuth as matildite. The volcanic rocks adjacent to the polymetallic veins are altered to quartz and chlorite. In the core of the veins, chlorite, manganous calcite, rhodochrosite, rhodonite, and spessartine occur with quartz gangue. The veins occur near an Upper Cretaceous-Paleocene ( Maastrichtian to Danian) volcanic vent. The vent breccia also contains disseminated sphalerite, galena, and cassiterite. The veins formed immediately after mineralization of vent breccia, with an approximate age K/Ar isotopic age of 65 Ma. 	Russia

L53-34	Lidovskoe	L	53	34	44 26 01N	135 48 35E	44.4336111111111	135.809722222222	4426'N	13549'E	Pb-Zn polymetallic vein   	Pb, Zn		Medium.  Average grade of 7.8% Pb; 6.4% Zn.  Mined since 1950's.  	Taukha	Govorov, 1977; Ratkin and others, 1990.	Consists of gently-dipping (approximately 30) sulfide veins that cut Early Cretaceous siltstone and sandstone.  Most veins contain galena and sphalerite, with subordinate nonmetallic minerals.  Deposit formed in two stages: (1) quartz, muscovite, chlorite, arsenopyrite, pyrite, and cassiterite; and (2) pyrrhotite, sphalerite, galena, chalcopyrite, stannite, carbonates, and chlorite.  Quartz-calcite veinlets with minor sulfides were emplaced during the later stage, after the intrusion of basaltic dikes.  Some ore bodies, whose composition is similar to that of the vein ore, are saddle-shaped; with ore overlying the gently-dipping upper surfaces of granodiorite bodies.  Granodiorite was altered by autometasomatism.  Age of granodiorite and associated ore is 69 to 72 Ma (K/Ar).	Russia

L53-35	Voznesenka-I	L	53	35	44 18 00N	132 07 51E	44.3	132.130833333333	4418'N	13208'E	Korean Zn  massive sulfide  	Zn		Medium.  Average grade of 4% Zn.  	Voznesenka	Androsov and Ratkin, 1990.	Consists of massive and thick-banded sphalerite and magnetite-sphalerite layers in bedded Early Cambrian limestone.  Ore bodies are lenticular, 1-2 m thick, 20 to 100 m long, and occur in dolomitic limestone and marl.  Sulfide bodies and host rocks are folded and regionally metamorphosed.  Sulfide bodies locally altered to skarn and greisen during emplacement of a Silurian granitic stock that intrudes the carbonate unit.  	Russia

L53-36	Voznesenka-II	L	53	36	44 11 01N	132 08 05E	44.1836111111111	132.134722222222	4411'N	13208'E	Fluorite greisen	Fluorite		Large.  450 million tons fluorite ore averaging 30-35% CaF2.  Mined since 1960's.  Currently largest producer of fluorite in Russia.  	Yaroslavka	Androsov and Ratkin, 1990.	Fluorite ore occurs above the apex of a 1.5 km wide intrusion of Late Cambrian (512-475 Ma) Li-F alaskite granite.  Deposit interpreted as forming during metasomatic replacement of Early Cambrian, black organic limestone resulting in alteration to greisen. Deposit and  vein greisen occurs along a north-south-trending fault.  Muscovite-fluorite aggregate  occurs at the periphery of the ore zone whereas vein greisen occurs in the middle of the zone. Greisen is often brecciated, showing a two-stage origin.  Fragments of breccia consist of mica-fluorite, fluoritized limestone, greisen, and granite altered to greisen. Fragments are cemented by quartz-topaz-micaceous-fluorite aggregate during the second stage.	Russia

L53-37	Yaroslavskoe	L	53	37	44 15 58N	132 13 16E	44.2661111111111	132.221111111111	4416'N	13213'E	Sn greisen   	Sn		Medium.  Average grade of 0.52% Sn. Mined during 1950's to 1970's.  	Yaroslavka	Govorov, 1977.	Consists of greisen that mainly replaces skarn, limestone, and schist; and to lesser extent granite and granite porphyry. Sn-bearing quartz and quartz-tourmaline veins are related replacement of skarn by greisen are classified into: (1) mineralized fracture zones,(2) ore veins, (3) veinlets and ore pods, and (4) saddle-shaped and sheeted ore. Sn ores are classified into three types based on mineral associations:  (1) tourmaline-quartz; (2) tourmaline-fluorite; and (3) sulfide-tourmaline-quartz with subordinate cassiterite-polymetallic and chlorite-sulfides. The sulfide minerals are dominantly pyrite, arsenopyrite, galena, and sphalerite. Deposit occurs along the contact of a Early Paleozoic biotite granite (approximately 400 Ma), intruding a Lower Cambrian shale, siltstone, sandstone, and limestone. The pre-ore pyroxene-scapolite, vesuvianite-garnet, and epidote-amphibole skarn occurs in limestone and shale along the granite contacts, and in rare limestone inclusions within the granite. 	Russia

L53-38	Chernyshevskoe	L	53	38	44 24 00N	133 17 00E	44.4	133.283333333333	4424'N	13317'E	Korean Zn massive sulfide	Zn, Pb		Small.  Average grade of 1.5-6.5% Pb and 0.7-2.5% Zn.	Voznesenka	Bazhanov, 1988.	Consists of sheeted pyrrhotite-arsenopyrite-pyrite-galena-sphalerite bodies that occur at the contact of a limestone sequence with overlying Early Cambrian siltstone. Rare conformable zones of disseminated sulfide mineralization occur within the limestone away from the contact.  Sulfide bodies are 1 to 2  m thick, with a surface exposure 100 to 200 m long.  Deposit was drilled to a depth of about 100 m.	Russia

L53-39	Lazurnoe	L	53	39	44 06 00N	134 24 00E	44.1	134.4	4406'N	13424'E	Porphyry Cu-Mo   	Cu, Mo		Small.   Contains up to 3 g/t Au; 0.3-0.6% Cu; 0.008-0.2% Mo.  	Luzhkinsky 	R.I. Petrachenko and V.G. Gonevchuk, written commun., 1984; Petrachenko, Gonevchuk, and Petrachenko, 1987.	Consists of a stockwork of veinlets and disseminated ore in an asymmetric semi-ring; around the hypabyssal body.  Chalcopyrite, bornite, pyrite, sphalerite, and molybdenite occur to a depth of 300 m.  Sulfide minerals associated with propylitic alteration (epidote, chlorite, sericite, and carbonate), and weak silicification and K-feldspar alteration of veinlets.  Quartz-carbonate veins with sulfides occur at surface.  The porphyry stockwork zone is 500 x 60 m, with an average concentration of approximately 0.15% Cu. Deposit related to hypabyssal Late Cretaceous gabbro-monzonite and monzodiorite that intrude Lower Cretaceous sedimentary rocks adjacent to the Central Deep Fault.  Mineralized stock intruded by granodiorite which contains a Au-sulfide occurrence.  	Russia

L54-01	Yagodnoe	L	54	01	47 08 46N	138 34 47E	47.1461111111111	138.579722222222	4709'N	13835'E	Au-Ag epithermal vein  	Au, Ag	Pb, Cu, Zn	Small.  Average grade of 4.28 g/t Au; 49.3 g/t Ag.  	Kema	R.I. Petrachenko, written commun., 1988.	Occurs in thin zones, up to 1 km long, of hydrothermally altered quartz and chlorite rock with superimposed Au-polymetallic deposit that contains galena and sphalerite, with minor chalcopyrite, Ag sulfides, and molybdenite.  Zones are associated with Paleocene (Danian) intrusions of diorite-quartz diorite and granodiorite-granite that intrude Late Cretaceous granite.	Russia

L54-02	Burmatovskoe	L	54	02	47 05 31N	138 06 18E	47.0919444444444	138.105	4706'N	13806'E	Au-Ag epithermal  vein	Au, Ag		Small.  Average grade of 0.8-8.4 g/t Au; 10-61 g/t Ag.  	Kema	Rodionov and Kuznetsov, 1984.	Consists of Au-Ag replacement of Paleocene age that occurs as lenticular metasomatic zones of varying mineralogy: (1) hydromica-quartz; (2) sericite-chlorite-quartz; and (3) carbonate-quartz.  Local skarn and propylite composed of magnetite, hematite, and chalcopyrite.  Ore zones are several hundred m long.  Au/Ag ratio is 1:1 to 1:100 and higher.  Ore minerals, which comprise up to 10% of the rock, are gold, silver, argentite, proustite, polybasite, and pyrargyrite.  Deposit not explored at depth. Host rocks are Late Cretaceous felsic tuff, tuffite, tuffaceous sandstone, and andesite that are intruded by Paleocene rhyolite and dacite.  	Russia

L54-03	Sukhoe	L	54	03	46 57 54N	138 08 50E	46.965	138.147222222222	4658'N	13809'E	Au-Ag epithermal vein  	Au, Ag		Small   	Kema	A.N. Rodionov, written commun., 1986.	Consists of carbonate-quartz, adularia-quartz, and chlorite-quartz veins that contain gold, silver, polybasite, pyrargyrite, proustite, galena, sphalerite, chalcopyrite, and pyrite.  Hydromica-quartz alteration zones are associated with ore-bearing veins.  Au/Ag ratio ranges from 1:15 to 1:40.  Veins are 5 cm to 2.5 m thick and several tens to several hundred m long.  Veinlet zones have no clear boundaries. Deposit hosted in altered Late Cretaceous tuff and rhyolitic lava.  Ore veins and zones are related to the extrusions and dikes of Paleocene (Danian) andesite.	Russia

L54-04	Bereznyakovskoe	L	54	04	47 04 02N	142 56 02E	47.0672222222222	142.933888888889	4704'N	14256'E	Volcanogenic Mn   	Mn		Small.  Ranges from 1 to 24% Mn.  	Aniva-Nabil	V.D. Sidorenko, 1974.	Consists of several small quartz-rhodonite lenses, with surficial pyrolusite and psilomelane in a weathered zone. Deposit occurs conformably to early to middle Paleozoic metamorphic rocks.  Ore bodies are small, with dimentsions of 0.6 x 25 to 1 x 120 m.  	Russia

L54-05	Burea River	L	54	05	46 33 00N	143 30 00E	46.55	143.5	4633'N	14330'E	W greisen(?)	W		Small.  Contains up to 1% W .  	Unassigned	Sidorenko, 1974.	Consists of veinlets disseminations of scheelite that are associated with quartz-mica alteration in a zone of hydrothermally altered Paleogene granitic rocks that intrude Jurassic and Cretaceous volcanic rocks and chert.	Russia

L54-06	Novikovskoe	L	54	06	46 17 42N	143 26 06E	46.295	143.435	4618'N	14326'E	Cyprus massive sulfide(?)  	Cu, Zn, Pb	Zn, Pb	Small.  Average grade of 1% Cu, 0.1% Zn, and 0.1% Pb.  	Aniva-Nabil	Sidorenko, 1974.	Consists of sulfide disseminations in propylitic-altered mafic volcanic rocks. Dominant metallic minerals are chalcopyrite and pyrite with subordinate galena, bornite, tetrahedrite, chalcocite and covellite.  Hydrothermal alteration consists of quartz, sericite, and carbonate.  Disseminations occur in zones that range from 0.1 to 0.7 m thick.  Deposit hosted in a Tertiary(?) chert- and volcaniclastic rock sequence. Deposit interpreted as forming during sea floor volcanism.	Russia

L55-01	Krishtofovich Volcano	L	55	01	45 46 51N	149 43 08E	45.7808333333333	149.718888888889	4547'N	14943'E	Sulfur-sulfide	S, FeS2		Medium.  Contains up to 35% S.  	Kuril	Znamensky, 1972.	Sulfur occurs in pods and in disseminations that are associated with quartz-kaolinite and alunite-quartz hydrothermal alteration of flows and tuff of the Krishtofovich volcano on southern part of Urup island.  Deposit occurs in the inner walls of the caldera.  Massive unleached ore contains up to 35% S and forms a pipe-like body with plan dimensions of 100 x 350 m.  Ore contains sulfur (up to 30%), pyrite, melnikovite (2-5%), opal, and quartz.  In some places, deposit occurs as massive sulfur. Age of mineralization interpreted as Pleistocene and Quaternary.	Russia

L55-02	Tet'yaevskoe	L	55	02	45 41 04N	149 35 25E	45.6844444444444	149.590277777778	4541'N	14935'E	Cu-Pb-Zn polymetallic vein	Cu, Zn, Pb		Medium.  Ore contains 0.12-7.8% Cu, up to 2.7% Zn, and 0.06-2.8% Pb.  	Kuril	Vlasov, 1977.	Consists of veinlets, disseminations, and quartz-sulfide veins that occur in hydrothermally altered siliceous rocks, and in silicified and sericite-altered volcanic and sedimentary rocks.  Ore minerals are pyrite, chalcopyrite, sphalerite, and galena.  Sphalerite is rich in Cd and Ge, pyrite contains Au inclusions.  Area of deposit approximately 20 km2; with uneven depth.  Deposit contains fracture zones. Deposit age interpreted as Middle Miocene.  	Russia

L55-03	Sof'ya	L	55	03	45 27 23N	148 42 42E	45.4563888888889	148.711666666667	4527'N	14843'E	Au epithermal vein	Au		Small. Average grade of 0.2%  Pb, up to 0.1% Cu, up to 0.12% Zn, and approximately 1 g/t Au.  	Kuril	R.I. Petrachenko,  written commun., 1980.	Consists of linear and spaced stockwork composed of variable-trending quartz-pyrite veinlets containing barite, apatite, and adularia. Stockwork occurs along a northwest trending fracture zone.  Host rocks are silicified and contain disseminated pyrite and sphalerite.  Metasomatic zoning consists of the successive assemblages:  (1) quartz-adulariamontmorillonite; (2) chlorite-montmorillonite;  and (3) albite-chlorite-carbonate.  Ore bodies up to 0.5 m thick. Occurs over an area of approximately 2 km2 in intermediate tuff and volcanic rocks. Deposit age is Late Miocene.	Russia

L55-04	Reidovskoe	L	55	04	45 12 19N	148 11 39E	45.2052777777778	148.194166666667	4512'N	14812'E	Porphyry Mo   	Mo		Small.   Locally contains up to 1.0% Mo.  	Kuril	Petrachenko and Petrachenko, 1989.	Consists of fine disseminations and veinlets of molybdenite in altered tuffaceous rocks of intermediate and mafic composition.  Rocks are silicified and contain diaspore, pyrophyllite, sericite, alunite, and dickite. Mineralized and altered rocks extend to  depths of over 400 m.  Ore mineral, in addition to molybdenite, include pyrite, marcasite, sphalerite, and chalcopyrite. Pliocene diorite stocks and dikes are interpreted as source of mineralizing fluids.  Age of deposit interpreted as Pliocene and Quaternary.	Russia

L55-05	Sernaya River  	L	55	05	45 09 37N	148 02 20E	45.1602777777778	148.038888888889	4510'N	14802'E	Au epithermal vein   	Au, Zn, Cu		Small. Up to 0.2% Zn, 0.01-0.2% Cu, 0.02-0.05% V, 0.005-0.1% Mo, and 0.8-1 g/t Au.  	Kuril	R.I. Petrachenko, written commun., 1978.	Consists of a series of closely spaced quartz-adularia-sulfide and quartz-adularia veinlets up to 15 to 20 cm thick, composed of barite and zeolite.  Veinlets occur along intersections of circular and radial faults.  Ore minerals are cleiophane, chalcopyrite, pyrite, ilsemannite, and silver suflosalts.  Hydrothermal alteration assemblages are chlorite-sericite, chlorite-montmorillonite, and quartz-adularia-montmorillonite. Temperature of ore-bearing quartz deposition was 250C.  Deposit occurs at the foot of Baransky volcano, in Miocene to Pliocene tuff and tuffaceous conglomerate, at the periphery of a modern hydrothermal system.  Age of mineralization interpreted as Pliocene.	Russia

L55-06	Vysokoe	L	55	06	45 00 51N	147 54 21E	45.0141666666667	147.905833333333	4501'N	14754'E	Sulfur-sulfide	S, FeS2		Medium.  Ore contains 25-30% S; about 10,000 tonnes of S.  	Kuril	Vlasov, 1971.	Consists of poorly consolidated fumarole and hot springs deposits that occur in the crater of and on the slopes of Machekha volcano. Fumarole and hot spring deposits cemented and partly replaced by sulfur.  Kaolinite and opal occur in addition to sulfur.   Age of mineralization interpreted as Holocene.  	Russia

L55-07	Novoe	L	55	07	44 55 42N	147 30 04E	44.9283333333333	147.501111111111	4456'N	14730'E	Sulfur-sulfide	S, FeS2	Mo	Large.  Contains up to 20-80% S and up to 0.5% MoS2 . Contains about 5 million tonnes sulfur.  	Kuril	Petrachenko, 1967.	Consists of sulfur bodies that occur in hydrothermally altered silicified rock, along with opalite, alunite, and kaolinite. Altered rocks contain sulfur, but highest concentrations sufur are associated with opalite, silicified rock, and alunite. Secondary minerals are barite, gypsum, marcasite, pyrite (up to 15%), and molybdenite. Deposit occurs in a flat-lying sequence, about 500 to 400 m thick, of andesite, andesite-basalt, and related tuff that crops out along scarps of a 2 km-wide erosional depression. Some ore bodies are controlled by faults.  Age of mineralization interpreted as Pliocene and Quaternary. 	Russia

L55-08	Rudnikovskoe	L	55	08	44 37 00N	147 22 00E	44.6166666666667	147.366666666667	4437'N	14722'E	Sn silicate-sulfide vein	Sn, Pb, Zn		Small.  Average grade of 0.03-0.4% Sn .  	Kuril	Petrachenko, 1973.	Consists of disseminated pyrite, sphalerite, chalcopyrite, and cassiterite; and quartz-chlorite veinlets with cassiterite in siliceous, chloritized, and epidotized hypabyssal diorite.  Sn content varies from 0.03 to 0.4% across mineralized zones that range up to 20 m wide and up to 50 m long.  A few galena veins also.  Deposit age interpreted as early Miocene.	Russia

L55-09	Prasolovskoe	L	55	09	44 19 20N	146 04 30E	44.3222222222222	146.075	4419'N	14605'E	Au-Ag epithermal vein.	Au, Ag		Medium.  Mined before 1990's.  	Kuril	Danchenko, 1991.	Consists of veins that mostly dip steeply and range from 2-3 m thick, with a few up to 10 m thick. Veins consist mainly of banded metacolloidal gold, telluride, and quartz veins that contain up to 1-3% ore minerals. Deposit vertically zoned. From bottom to top, assemblages are:  (1) gold-cassiterite-quartz; (2) polysulfide-quartz; (2) gold-telluride-quartz; and (3) gold-adularia (carbonate)-quartz. Dominant ore minerals are pyrite, chalcopyrite, bornite, chalcocite, covellite, and sphalerite. Arsenopyrite, molybdenite, cassiterite, galena, argentite, native silver, gold, hessite, naumannite, and goldfieldite are also abundant. Limonite, covellite, malachite, and azurite occur in an oxidized zone. Deposit explored to a depth of over 200 m. An area 1.5 by 0.5 km is propylitically altered and impregnated with pyrite as well as numerous quartz veinlets with epidote, sericite, adularia, chlorite, calcite, and rare barite. Earlier veinlet and disseminations are related to Miocene intrusions. Later Au-Ag minerals is related to the Pliocene volcano-plutonic complex. Deposit is associated with Pliocene plagiogranite and quartz diorite that intrude early and middle Miocene pyroclastic green tuff deposits. 	Russia

L55-10	Valentinovskoe	L	55	10	44 12 03N	145 57 37E	44.2008333333333	145.960277777778	4412'N	14558'E	Kuroko Cu-Pb-Zn massive sulfide	Cu, Pb, Zn		Small.  Average grade of 1% Cu, 1.5-1.7% Pb, and 10-13% Zn in fine-grained ore, and locally up to 4% Cu, 10-16% Zn, and 1-1.7% Pb.  	Kuril	Neverov, 1964.	Consists of two steeply-dipping, thin, lens-like deposits, up to 150 m long. Two deposit types exist: (1) most common type composed of massive, fine-grained sphalerite, galena, chalcopyrite, chalcocite, tetrahedrite, melnikovite, barite, gypsum, quartz, chalcedony, chlorite, sericite, and calcite; contains approximately 1% Cu, 1.5-1.7% Pb, and 10-13% Zn; and (2) less common ore type consists of pyrite, sphalerite, and chalcopyrite with galena and other sulfides; contains up to 4% Cu, 10 - 16% Zn, and 1 - 1.7% Pb. Deposit occurs in Early Miocene rhyolite, dacite, andesite, and andesitic tuff with chert layers. Host rocks are propylitized or sericitized, and are part of a submarine tuff complex. 	Russia

L55-11	Spiridonovskoe	L	55	11	44 00 31N	145 45 23E	44.0086111111111	145.756388888889	4401'N	14545'E	Sn polymetallic vein	Sn, Pb, Zn		Small.   Contains up to 0.13% Sn.  	Kuril	Petrachenko, 1978.	Consists of disseminated pyrite, galena, sphalerite, and stannite that occur in chlorite-sericite-K-feldspar-quartz altered rocks.  Disseminations occur in fracture zones in rhyolite-dacite lava flows.  Deposit age interpreted as Pliocene.	Russia

L56-01	Dushnoe	L	56	01	46 58 11N	152 04 02E	46.9697222222222	152.067222222222	4658'N	15204'E	Cu-Pb-Zn polymetallic vein   	Cu, Zn, Pb		Small   	Kuril	Sidorenko, 1974.	Consists of polymetallic veins and steaks in an area about a few tens of m long that consist of disseminated chalcopyrite, sphalerite, galena, and pyrite that occur in light-colored, argillized rocks.  Hydrothermal alteration associated with sulfides.  Deposit hosted in Late Miocene pyroclastic rocks along Srednyaa Bay and Dushnaya Bay on Simushir Island. Deposit age interpreted as Pliocene(?).  	Russia

M09-01	Red Dog	M	09	01	50 42 48N	127 57 42W	50.7133333333333	-127.961666666667	5043'N	12758'W	Porphyry Cu	Cu	Ag	Medium.  Reserve of 41.1 million tonnes grading 0.26% Cu, 0.34 g/t Au.	Island Porphyry 	B.C. Minfile, 1989; EMR Canada, 1989; Mining Review, 1992.	Consists of chalcopyrite and bornite that occur as disseminations and as fracture fillings  in hornfels and associated with magnetite in siliceous breccia.  Molybdenite occurs in lesser quantities in fractures and quartz-sericite veins that occur along shear zones.  Host rocks are Lower Jurassic Bonanza Group tuffs metamorphosed to hornfels at contacts, with silicification and hydrothermal alteration.  K-Ar date of 144  5 Ma of the associated Island Plutonic Suite yields an approximate age of mineralization.  Deposit age interepreted as Late Jurassic. 	Canada

M09-02	Island Copper (Rupert Inlet)	M	09	02	50 36 42N	127 30 36W	50.6116666666667	-127.51	5037'N	12731'W	Porphyry Cu-Mo	Cu, Mo, Au		Large.  Production and reserves of 257 million tonnes grading 0.52% Cu, 0.22 g/t Au.	Island Porphyry 	Cargill and others, 1976; B.C. Minfile, 1989; EMR Canada, 1989.	Consists of pyrite, chalcopyrite and molybdenite that occur as fracture fillings and disseminations. Chalcopyrite and galena occur in minor amounts peripheral to the pyrite and chalcopyrite mineralization.  Deposit occurs in two parts; the main body on the hanging wall of the dike is tabular shaped, from 60 to 180 meters wide, 1700 meters long and 300 meters deep with a strike of 290Az and dipping 60N parallel to the dike.  The footwall zone is not as well defined as the hanging wall zone.  Hosted in Lower Jurassic Bonanza Group andesitic and basaltic tuffs that are intruded by a quartz feldspar porphyry dike.  A K-Ar age of 154  6 Ma from nearby rocks of the Island Plutonic Suite gives an approximate age of mineralization.  Deposit  age interpereted as Late Jurassic. 	Canada

M09-03	Benson Area (Empire, Coast Copper)	M	09	03	50 22 48N	127 14 30W	50.38	-127.241666666667	5023'N	12715'W	Cu-Fe skarn	Cu, Fe	Au	Medium.  Production and reserves of 3.0 million tonnes grading 1.56% Cu, 26.6% Fe, 1.4 g/t Au.	Island Porphyry	Sangster, 1969; B.C. Minfile, 1989.	Consists of magnetite and chalcopyrite with minor bornite and pyrrhotite that occur as skarn replacement bodies along the northwest-striking and moderately west-dipping contact between Quatsino Formation limestone and Karmutsen Formation, both part of the Upper Triassic Vancouver Group.  Low-grade gold and silver values are associated with chalcopyrite that occurs as veinlets and disseminations in sill-like  lenses, in calc-silicate skarn and massive magnetite.  Production between 1962 and 1973 from the Empire and Old Sport orebodies was 2,657,593 tonnes yielding 1.5 % Cu, 27.14% Fe, 1.47 g/t Au and 4.41 g/t Ag.  Deposit age interpreted as Jurassic. 	Canada

M09-04	Zeballos Iron (Ford)	M	09	04	50 02 54N	126 50 00W	50.0483333333333	-126.833333333333	5003'N	12650'W	Fe skarn	Fe		Medium.  Reserves of 2.268 Mt grading 7.9% Fe2O3.	Island Porphyry	Sangster, 1969; B.C. Minfile, 1989.	Consists of magnetite that occurs as a 21-meter thick and 400 meter long, northeast-striking, northwest-dipping tabular replacement body formed along the contact between Upper Triassic Quatsino Limestone of the Vancouver Group and tuff of the Lower Jurassic Bonanza Group.  Host rocks form a roof pendant surrounded by granodiorite and hornblende diorite of the Early to Middle Jurassic Island Plutonic Suite.  Production, both open pit initially and later underground, between 1962 and 1969, was 1,187 tonnes Fe.  Pre-production reserves in 1959 were 2.268 million tonnes grading 47.9% magnetite, with additional possible reserves of 450,000 tonnes at similar grade.  Deposit age interpreted as Early to Middle Jurassic.	Canada

M10-01	Fish Lake	M	10	01	51 27 48N	123 37 36W	51.4633333333333	-123.626666666667	5128'N	12338'W	Porphyry Cu-Mo	Cu, Au	Ag, Mo, Zn	Large.  Reserves of 675 million tonnes grading 0.24% Cu, 0.43 g/t Au.	Fish Lake-Bralorne 	Wolfhard, 1976; B.C. Minfile, 1991; EMR Canada, 1989; McMillan, 1991; Taseko Mines Ltd., news release, May 4, 1993.	Consists of pyrite and chalcopyrite with minor molybdenite, bornite, sphalerite and tetrahedrite that occur in stockwork veins and as disseminations in a Late Cretaceous quartz-diorite porphyry and adjacent contact metamorphosed Lower Cretaceous sedimentary and volcanic rocks.  Principal orebody (Cu >0.25%) is ovoid shaped with dimensions of 450 meters by 250 meters.  A whole rock isotopic date of 77.2  2.8 Ma  yields a deposit age of Late Cretaceous. 	Canada

M10-02	Chu Chua	M	10	02	51 22 48N	120 03 36W	51.38	-120.06	5123'N	12004'W	Cyprus massive sulfide	Cu, Zn, Au, Ag	Co	Medium.  Reserves of 2.5 million tonnes grading 2% Cu, 0.5% Zn, 0.5 g/t Au, 9 g/t Ag.	Kootenay-Shuswap	Schiarizza and Preto, 1987; B.C. Minfile, 1990; EMR Canada, 1989; Hoy, 1991.	Consists of pyrite with chalcopyrite and minor sphalerite that occur in two major and several smaller stratiform massive sulfide lenses associated with pyritic, cherty sediments and pillowed basalt of the Upper Paleozoic (Devonian to Permian) Fennel Formation.  Chalcopyrite and sphalerite occur interstitially to pyrite. Basalt locally extensively altered to talc and carbonate in structures interpreted as vents.  Open-pit  geological reserves of 1.043 million tonnes grading 2.97% Cu with a 3:1 stripping ratio and a 1% Cu cut-off were reported in 1989.  Deposit age interpreted as Upper Paleozoic. 	Canada

M10-03	Tungsten Queen (Silverquick, Manitou)	M	10	03	51 02 30N	122 49 00W	51.0416666666667	-122.816666666667	5103'N	12249'W	Silica-carbonate Hg	Hg	W, Sb, Au	Medium.  Reserves of 1.5 million tonnes grading 0.4% Hg.	Tyaughton-Yalakom	B.C. Minfile, 1985; EMR Canada, 1989; Schiarrizza and others, 1990.	Consists of cinnabar in disseminated grains, streaks, small lenses and smears on fault surfaces in brecciated Upper Jurassic to Lower Cretaceous conglomerate at Silverquick occurrence, and in shear zones in amygdaloidal volcanics at the Manitou (Empire) occurrence.  Deposit age interoreted as Eocene(?). 	Canada

M10-04	Poison Mountain (Copper Giant)	M	10	04	51 08 00N	122 36 48W	51.1333333333333	-122.613333333333	5108'N	12237'W	Porphyry Cu-Mo	Cu, Mo	Ag, Au	Medium.  Reserves of 180 million tonnes grading 0.31% Cu, 0.007% Mo, 0.14g/t Au, 40g/t Ag.	Fish Lake-Bralorne 	Seraphim and Rainboth, 1976; EMR Canada, 1989; McMillan, 1991; George Cross Newsletter no. 65, April 2, 1993.	Consists of pyrite, chalcopyrite, molybdenite and bornite that occur in veinlets, fracture fillings and disseminations. Deposit hosted mainly in and near the perimeter of the core of a zoned Eocene intrusive, hosted by greywacke and grit of Upper Jurassic-Lower Cretaceous Relay Mountain Group. Intrusive core is hornblende-quartz monzonite porphyry.  Deposit age interpreted as Eocene(?). 	Canada

M10-05	Bralorne, Pioneer (Bridge River Area)	M	10	05	50 46 42N	122 49 18W	50.7783333333333	-122.821666666667	5047'N	12249'W	Au-Sb polymetallic vein	Au	W, Sb	Medium. Production and reserves of 8.34 million tonnes grading 16.2 g/t Au.	Fish Lake-Bralorne 	B.C. Minfile, 1985; EMR Canada, 1989; Leitch and others, 1989; B.C. Minfile, 1991.	Consists of gold  in quartz veins (fracture fillings) with pyrite, arsenopyrite and scheelite.  Veins range from 1.5 to 2 meters wide and are hosted in Permo-Triassic diorite, gabbro and greenstone in a steeply dipping north-trending shear zone (Cadwallader Break) and associated with Late Cretaceous (86-91 Ma) porphyry dikes.  Significant production occurred in two major deposits, the Bralorne and Pioneer mines.  Production from the Bralorne mine from 1899 to 1971 was 81.1 tonnes Au from 5.0 million tonnes milled and production from the Pioneer mine between 1908 and 1960 was 40.4 tonnes Au from 2.4 million tonnes milled.  Proven ore probable reserves for Bralorne above and below the 1000 m level are 965,000 tonnes grading 9.3 g/t Au.  Deposit age interpreted as Late Cretaceous. 	Canada

M10-06	Maggie (Bonaparte River)	M	10	06	50 55 24N	121 25 12W	50.9233333333333	-121.42	5055'N	12125'W	Porphyry Cu-Mo	Cu, Mo		Medium.  Reserves of 181 million tonnes grading 0.28% Cu, 0.029% MoS2.	Fish Lake-Bralorne 	Miller, 1976;  EMR Canada,1989, MR 223; B.C. Minfile, 1990; Mining Review, 1992; 	Consists of chalcopyrite and molybdenite that occur as fine disseminations in quartz veins and in host rock and as narrow veinlets within or bordering quartz and to lesser degree calcite veins.  Potassic and phyllic alteration assemblages overlap in the zones of high grade ore; phyllic and argillic assemblages are associated with lower grade ore. Principal host rock is quartz monzonite of the Tertiary (61 Ma) Maggie Stock. Part of deposit occurs within Upper Paleozoic and Lower Mesozoic Cache Creek Group metasedimentary and metavolcanic rocks.  Deposit age interpreted as Paleocene. 	Canada

M10-07	Owl Creek district	M	10	07	50 22 48N	122 45 24W	50.38	-122.756666666667	5023'N	12245'W	Porphyry Cu-Mo	Cu, Mo		Medium.  Estimated 10 to 20 million tonnes grading 0.3% to 0.4% Cu, 0.03% MoS2.	Owl Creek	BCGS, 1970; Mahoney, 1977; EMR Canada, 1989; B.C. Minfile, 1991.	Consists of several zones of chalcopyrite, molybdenite and pyrite with minor bornite that occur as blebs, disseminations and fracture fillings. Deposit hosted in Jurassic to Tertiary quartz diorite and feldspar porphyry intrusives of the Coast Plutonic Complex and in propylitic and argillic altered and dioritized volcanic rocks of the Upper Triassic Cadwallader Group.  Deposit age interpreted as Tertiary. 	Canada

M10-08	Bethlehem-JA	M	10	08	50 29 54N	120 59 12W	50.4983333333333	-120.986666666667	5030'N	12059'W	Porphyry Cu-Mo	Cu, Mo		Large.  Production and reserves of 430 million tonnes grading 0.45% Cu.	Guichon	Briskey and Bellamy, 1976; B.C. Minfile, 1988; McMillan, 1985, 1991.	Bethlehem deposits (Jersey, East Jersey, Huestis, Iona and JA) consist of chalcopyrite, bornite, specularite and molybdenite with minor magnetite and chalcocite as fracture fillings and to a lesser degree as disseminations hosted within granodioritic and quartz dioritic phases of the Late Triassic-Early Jurassic Guichon Creek Batholith.  Reserves for the JA are 286 million tonnes at 0.43% Cu and 0.017% MoS2.  Reserves and production for the remaining Bethlehem deposits are 144 million tonnes  at 0.50% Cu and 0.013 g/t Au.  Deposit age interpreted as Early Jurassic (199 Ma). 	Canada

M10-09	Valley Copper	M	10	09	50 29 06N	121 02 48W	50.485	-121.046666666667	5029'N	12103'W	Porphyry Cu-Mo	Cu, Mo		Large. Production and reserves of 716 million tonnes grading approximately 0.47% Cu, 0.006% Mo.	Guichon	Osatenko and Jones, 1976; McMillan, 1985, 1991; B.C. Minfile, 1989; Highland Valley Copper Ltd., annual report, 1991.	Consists of disseminated chalcopyrite (potassic alteration) and bornite (phyllic alteration) with minor digenite, covellite, pyrite, pyrrhotite, molybdenite, sphalerite and galena. Deposit hosted in granodiorite and quartz monzonite of the Bethsaida phase of the Guichon Creek Batholith (204 Ma).  Minor amounts of iron-antimony sulfide (gudmundite) and native gold have also been reported.  An oxidized halo of ranging in thickness from 0.3 to 100 meters consists of limonite, malachite, pyrolusite, digenite, native copper and tenorite .  The average thickness of the oxidized zone is 33 meters.  Deposit age interpreted as Early Jurassic.	Canada

M10-10	Lornex	M	10	10	50 27 00N	121 02 30W	50.45	-121.041666666667	5027'N	12103'W	Porphyry Cu-Mo	Cu, Mo		Large. Production and reserves of 530 million tonnes grading approximately 0.37% Cu, 0.014% Mo.	Guichon	Waldner and others, 1976; McMillan, 1985, 1991; B.C. Minfile, 1991; Highland Valley Copper Ltd., 1991.	Consists of chalcopyrite, bornite, molybdenite and pyrite as fracture fillings and coatings. Deposit hosted in granodiorite of the Skeena phase of the Guichon Creek Batholith (204 Ma) and pre-mineralization quartz porphyry dike related to the Bethsaida phase.  Western edge of the orebody is faulted; extension is probably represented by the Valley Copper deposit 2.5 km north.  Deposit age interpreted as Early Jurassic. 	Canada

M10-11	Highmont (Gnawed Mountain)	M	10	11	50 25 54N	120 59 48W	50.4316666666667	-120.996666666667	5026'N	12060'W	Porphyry Cu-Mo	Cu, Mo		Medium.  Production and reserves of 123 million tonnes grading 0.23% Cu, 0.006 g/t Au, 0.021% Mo.	Guichon	Reed and Jambour, 1976; McMillan, 1985, 1991; B.C. Minfile, 1991.	Consists of four large, low-grade mineralized zones and three smaller zones at the southern end of the Highland Valley porphyry copper district.  Ore minerals consist of chalcopyrite, bornite and molybdenite in veins and fractures with minor disseminated chalcopyrite hosted in quartz diorite of the Skeena phase and quartz monzonite of the Bethsaida phase of the Guichon Creek Batholith (204 Ma).  Deposit age interpreted as Early Jurassic.	Canada

M10-12	Iron Mask Area (Afton, Ajax)	M	10	12	50 39 42N	120 30 48W	50.6616666666667	-120.513333333333	5040'N	12031'W	Porphyry Cu-Au	Cu	Au	Medium.  Production and reserves of 66 million tonnes grading 0.77% Cu, 0.56 g/t Au.	Copper Mountain (South)	Kwong, 1987; B.C. Minfile, 1990; McMillan, 1991; Ross and others, 1992, 1993.	Major porphyry Cu-Au deposits at Afton and Ajax (West and East) are hosted in Iron Mask Batholith that contains several shallow, open-pit, alkaline intrusive-related, porphyry Cu-Au deposits. Afton Mine is a tabular-shaped deposit hosted hosted in fractured diorite of the Cherry Creek pluton (U-Pb zircon age of 207 Ma) with a deeply penetrating supergene zone characterized by the presence of native copper and lesser chalcocite.  The hypogene zone at Afton  mine consists of chalcopyrite, bornite and pyrite mineralization in fractures. Ajax deposit, located 10 km southeast of Afton Mine near the southwestern edge of the batholith, occurs at the intersection of two major dioritic phases of the batholith, the Sugarloaf diorite and the hybrid diorite.  Ore minerals are pyrite and chalcopyrite with trace amounts of bornite, chalcocite and molybdenite. Deposits ages interpreted as Early Jurassic. 	Canada

M10-13	O.K.	M	10	13	50 02 30N	124 38 48W	50.0416666666667	-124.646666666667	5003'N	12439'W	Porphyry Cu-Mo	Cu, Mo	Zn	Medium.  Reserves of150 million tonnes grading 0.39% Cu, 0.024% MoS2.	Gambier 	Meyer and others, 1976; B.C. Minfile, 1988; EMR Canada, 1989; Mining Review, 1992.	Consists of chalcopyrite, molybdenite and pyrite with minor sphalerite and bornite that occur in fractures, as quartz stringers, irregular veinlets, blebs and as disseminations. Deposit hosted primarily in granodiorite of the Coast Plutonic Complex adjacent to an elliptical quartz monzonite body. Intrusives ages range from Jurassic to Tertiary, mineralization is Late Cretaceous.  Deposit age interpreted as Late Cretaceous.	Canada

M10-14	Craigmont	M	10	14	50 12 30N	120 55 30W	50.2083333333333	-120.925	5013'N	12056'W	Cu-Fe skarn	Cu, Fe	Au, Ag	Medium.  Production and reserves of 34.9 million tonnes grading 1.21% Cu, 19.6% Fe.	Guichon	Morrison, 1980; B.C. Minfile, 1983, 1988; Dawson and others, 1991.	Consists of magnetite, hematite and chalcopyrite that occur as massive pods, lenses and disseminations within a calc-silicate skarn assemblage that replaces carbonates. Host rocks part of the Triassic Nicola Group that occurs near the southern boundary of the Lower Jurassic Guichon Batholith.  Production between 1962 and 1982 was 33.4 million tonnes grading 1.21% Cu, 0.002 g/t Au and 0.007 g/t Ag.  Reserves are estimated at 1.5 million tonnes grading 1.13% Cu.  A  500,000 tonne stockpile of magnetite ore exists, from which approximately 45,000 tonnes per year are shipped to coalfields for use in heavy media separation.  Deposit age interpreted as Early Jurassic. 	Canada

M10-15	Westmin (Buttle Lake- Myra, Lynx, H-W, Battle)	M	10	15	49 34 06N	125 36 12W	49.5683333333333	-125.603333333333	4934'N	12536'W	Kuroko Zn-Cu massive sulfide	Zn, Cu, Ag, Au	Pb, Ba	Large. Production and reserves of 30.3 million tonnes grading 2.23g/t Au, 54.5g/t Ag, 2.12% Cu, 7.1% Zn.	Mount Sicker	B.C. Minfile, 1990; Juras and Pearson, 1991; Hoy, 1991; George Cross Newsletter no. 30, February 12, 1993.	Consists of massive sphalerite, chalcopyrite, pyrite and lesser galena and barite with minor tennantite, bornite, pyrrhotite, digenite, covellite and stromeyerite that occur in a number of lenses along an east-west trend. Deposit hosted within Late Devonian Myra Formation felsic volcanics of the Sicker Group.  Deposits occur at two stratigraphic levels; the H-W horizon at the base of the Myra Formation, and the Lynx-Myra-Price horizon in the central portion of the Myra Formation. Stratigraphic footwall of >300 m of basaltic andesite is intensely altered to quartz-sericite-pyrite under the H-W deposit.  Recent exploration by Westmin Resources Ltd., has extended reserves by finding new orebodies at both stratigraphic horizons and by re-evaluating sulfide clast-bearing breccias.  Deposit age interpreted as Upper Devonian.	Canada

M10-16	Texada (Vananda, Marble Bay, etc.)	M	10	16	49 45 24N	124 33 24W	49.7566666666667	-124.556666666667	4945'N	12433'W	Cu-Au skarn	Cu, Au, Ag		Medium.  Produced 393,190 tonnes grading 6.2% Cu, 2.3 g/t Au, 9.9 g/t Ag.	Island Porphyry	B.C. Minfile, 1983, 1990; Vananda Gold Ltd., annual report,1992; Webster and Ray, 1990; Ray and Webster, 1991.	Consists of chalcopyrite and bornite that occur in irregular pipe-like bodies in several copper skarn deposits in the northern portion of Texada Island. Deposit hosted within limestonesof the Upper Triassic Quatsino Formation and occurs along contacts with Middle to Late Jurassic dioritic intrusions of the Island Suite.  Main producers of the Vananda area were the Marble Bay, Copper Queen, Cornell and Little Billie mines where, between 1896 and 1952, 393,190 tonnes of production yielded 897 kg of Au, 3.9 tonnes of Ag and 2,438 tonnes of Cu.  Drill indicated reserves at the Little Billie deposit are reported as 181,400 tonnes grading 11.1 g/t Au, 34.3 g/t Ag, and 2.0% Cu.  Deposit age interpreted as Jurassic. 	Canada

M10-17	Texada Iron	M	10	17	49 42 42N	124 32 54W	49.7116666666667	-124.548333333333	4943'N	12433'W	Fe skarn	Fe	Cu, Ag, Au, Zn	Medium.  Produced 17.6 million tonnes grading 61% Fe.	Island Porphyry	Sangster, 1969; B.C. Minfile, 1990;  Webster and Ray, 1990.	Consists of massive magnetite skarn mineralization that occurs as replacement bodies at the Prescott, Yellow Kid, and Paxton mines. Deposits hosted within limestones of the Upper Triassic Quatsino Formation at or near contacts with quartz monzonite of the Middle Jurassic Gillies Stock (U-Pb zircon date of 178 Ma).  Massive magnetite is associated with garnet, pyroxene, epidote, amphibole, minor calcite and sporadic pyrite and pyrrhotite.  Rare arsenopyrite and sphalerite also occur.  Recent sampling of Fe-skarn magnetite from the Texada Iron Mines with values of 3.14% Cu, 46.6 g/t Ag and 2.8 g/t Au.  Deposit age interpreted as Middle Jurassic.	Canada

M10-18	Gambier Island	M	10	18	49 30 54N	123 22 06W	49.515	-123.368333333333	4931'N	12322'W	Porphyry Cu-Mo	Cu, Mo	Zn, Pb	Medium.  Reserves of 114 million tonnes grading 0.29% Cu, 0.018% MoS2.	Gambier	EMR Canada, 1989; B.C. Minfile, 1990;  Mining Review, 1990.	Consists of pyrite, chalcopyrite and molybdenite that occur as disseminations, fracture fillings and veinlets. Deposit hosted in early Tertiary quartz porphyry intrusive of the Coast Plutonic Complex and adjacent volcanics of the Cretaceous Gambier Group.  Tertiary intrusive rocks form a 500 meter diameter, northwest trending oval-shaped stock. Deposit occurs in a broad arcuate zone 200 meters wide and 1200 meters long.  Deposit age interpreted as early Tertiary.	Canada

M10-19	Britannia	M	10	19	49 36 42N	123 08 24W	49.6116666666667	-123.14	4937'N	12308'W	Kuroko Cu-Zn massive sulfide	Cu, Zn	Ag, Au	Medium.  Production and reserves of 49.3 million tonnes grading 2.8%Cu, 0.32g/t Au, 3.78 g/t Ag, 0.26% Zn.	Britannia	Payne and others, 1980; B.C. Minfile, 1983, 1990; EMR Canada, 1989; Dawson and others, 1991.	Consists of massive pyrite, chalcopyrite, sphalerite with minor galena, tennantite, tetrahedrite, barite and fluorite that occur in numerous discrete, concentrically zoned siliceous ore bodies. Deposits hosted in a deformed roof pendant of Lower Cretaceous metavolcanic rocks of the Gambier Overlap Assemblage enclosed within granodiorite of the Coast Plutonic Complex.  Principal host rocks are foliated pyroclastic rocks of dacitic to andesitic composition.  During the period from 1905 to 1974 the Britannia Mine produced  47,884,558 tonnes of ore from which 15.3 tonnes Au, 180.8 tonnes Ag, 517 tonnes Cu, 15.6 tonnes Pb and 125.3 tonnes Zn were recovered.  Measured and drill-indicated reserves are 1.57 million tonnes grading 1.9% Cu remain.  Deposit age interpreted as Early Cretaceous.	Canada

M10-20	Clear Creek (Gem)	M	10	20	49 43 12N	121 43 06W	49.72	-121.718333333333	4943'N	12143'W	Porphyry Mo	Mo	Cu, Zn, W, Bi	Medium.  Reserves of 15.9 million tonnes grading 0.07% Mo.	Owl Creek	EMR Canada, 1989; B.C. Minfile, 1992.	Consists of molybdenite with minor pyrite and sphalerite that occur in quartz and calcite veins and as fracture fillings. Deposit occurs in an arcuate zone in and surrounding an Oligocene quartz monzonite stock (Gem Stock, K-Ar age of 35 Ma).  Other host rocks are quartz diorite and granodiorite of the mid-Cretaceous Spuzzum pluton and schist and gneiss of the Cretaceous Settler Schist.  Deposit age interpreted as Oligocene.	Canada

M10-21	Axe (Summers Creek, Axe)	M	10	21	49 39 24N	120 32 12W	49.6566666666667	-120.536666666667	4939'N	12032'W	Porphyry Cu-Mo	Cu	Mo	Medium.  Estimated 57.5 million tonnes grading: 0.5% Cu.	Guichon	Northern Miner, September, 1973; Ney and Hollister, 1976; B.C. Minfile, 1985; EMR Canada, 1989; 	Consists of disseminated chalcopyrite, pyrite and molybdenite with minor chalcocite that occur as disseminations and fracture fillings in mafic volcanics of the Upper Triassic Nicola Group associated with felsic and mafic Jurassic granodiorite intrusives.  Alteration is potassic and argillic with quartz-sericite alteration also reported.  Three zones are explored, the South Zone, West Zone and Adit Zone.  Reserve estimates uncertain due to poor core recovery.  Deposit age interpreted Jurassic. 	Canada

M10-22	Primer (North Zone)	M	10	22	49 45 18N	120 27 30W	49.755	-120.458333333333	4945'N	12028'W	Porphyry Cu	Cu, Fe		Medium.  Reserves of 23 million tonnes grading 0.20% Cu.	Guichon	Ney and Hollister, 1976; B.C. Minfile, 1985; EMR Canada, 1989.	Consists of chalcopyrite and pyrite that occur with magnetite and quartz as fracture fillings. Deposit hosted in Jurassic feldspar porphyry which intrudes Triassic Nicola Group volcanics.  Deposit age interpreted as Jurassic.	Canada

M10-23	Brenda (Peachland Area)	M	10	23	49 52 48N	120 00 18W	49.88	-120.005	4953'N	12000'W	Porphyry Cu-Mo	Cu, Mo	Ag, Au, Zn	Large.  Production and reserves of 164.0 million tonnes grading 0.16% Cu, 0.04% Mo, 0.031 g/t Au, 0.63g/t Ag.	Guichon	Soregaroli and Whitford, 1976; B.C. Minfile, 1985, 1990; McMillan, 1991.	Consists of chalcopyrite and molybdenite with minor pyrite and magnetite occur within veins and fractures. Deposit hosted in granodiorite and quartz diorite of the Middle Jurassic Brenda Stock.  Mineralization occuring during at least five stages of vein emplacement, each with unique attitudes and overall mineralogy developed in fractures. Grade is a function of fracture density and mineralogy of the veins.  Potassic alteration (K-feldspar and biotite) accompanies sulfide mineralization.  K-Ar hornblende age of 176 Ma for the Brenda Stock and K-Ar biotite age of 146 Ma (latest Jurassic) interpreted as age of deposit.	Canada

M10-24	Catface	M	10	24	49 15 24N	125 58 48W	49.2566666666667	-125.98	4915'N	12559'W	Porphyry Cu-Mo	Cu	Au, Mo	Medium.  Reserves of 181 grading 0.45% Cu, 0.05 g/t Au.	Catface	McDougall, 1976; B.C. Minfile, 1990; Dawson and others, 1991; Mining Review, 1992.	Consists of chalcopyrite, bornite, chalcocite, pyrite, pyrrhotite and molybdenite that occur in fractures and quartz veinlets. Deposit hosted in quartz monzonite and quartz diorite of the Eocene Catface Suite, and by meta-basalt of uncertain origin, either Upper Triassic Karmutsen Formation or Paleozoic Sicker Group.  K-Ar biotite age of 48  12 Ma for the Catface Intrusive Suite interpreted as Eocene age of deposit.	Canada

M10-25	Kennedy Lake (Brynnor)	M	10	25	49 03 00N	125 26 00W	49.05	-125.433333333333	4903'N	12526'W	Fe skarn	Fe		Medium.  Produced 4.48 million tonnes grading 68.3% Fe.	Island Porphyry	Sangster, 1969; B.C. Minfile, 1983, 1988.	Consists of magnetite skarn replacement of Upper Triassic Quatsino limestone along a stratigraphic contact with interbedded tuff. Skarn occurs adjacent to an intrusive contact with quartz diorite of the Early to Middle Jurassic Island Suite.  Pyrite and pyrrhotite occur in trace quantities within the magnetite.  Two orebodies occur: the main body, which was mined by open pit between 1962 and 1968; and a second body located east-southeast of the open pit.  Reserve data not available, but are probably  sufficient to allow the classification of the Brynnor deposit as a medium size deposit (>5 million tonnes contained metal).  Deposit age interpreted as Early to Middle Jurassic. 	Canada

M10-26	Lynn Creek	M	10	26	49 25 18N	123 03 42W	49.4216666666667	-123.061666666667	4925'N	12304'W	Zn-Pb skarn	Zn, Pb	Ag, Cu	Medium.  Reserves of 272,000  tonnes grading 9.0% Zn (average),  variable Ag.	Gambier	Western Miner, no. 112, p. 32-34, 1963; Northern Miner, October 31, 1963; B.C. Minfile, 1985, 1989; EMR Canada, 1989.	Consists of sphalerite, galena, pyrrhotite, chalcopyrite and pyrite in quartz veins and calc-silicate skarn. Deposit hosted in shear zones in a roof pendant of Jurassic to Cretaceous metasedimentary and metavolcanic rocks of the Gambier Group enclosed within diorite of the Coast Plutonic Complex.  Ag ranges up to 68.6 g/t, Zn up to 20%.  Deposit age interpreted as Late Cretaceous-Tertiary.	Canada

M10-27	Seneca (Harrison)	M	10	27	49 19 00N	121 56 36W	49.3166666666667	-121.943333333333	4919'N	12157'W	Kuroko Zn-Cu-Pb massive sulfide	Zn, Cu, Pb, Ag	Au, Ba	Medium.  Reserves of 1.50 million tonnes grading 3.57% Zn, 41.13 g/t Ag, 0.82 g/t Au.	Unassigned	B.C. Minfile, 1988; Dawson, and others, 1991; International Curator Resources Ltd., new release, November, 1991.	Consists of sphalerite, chalcopyrite, pyrite, galena and barite that occur as massive stratiform bodies. Hosted in felsic tuffs and coarse pyroclastics and overlain by andesite flows of the Jurassic Harrison Lake Formation.  Reserves also contain 0.63% Cu and 0.15% Pb.  Deposit age interpreted as Jurassic. 	Canada

M10-28	Giant Nickel (Pride of Emory)	M	10	28	49 28 30N	121 30 48W	49.475	-121.513333333333	4929'N	12131'W	Gabbroic Ni-Cu	Ni, Cu	Au, PGE	Medium.  Produced 4.3 million tonnes grading 0.77% Ni, 0.33% Cu, 0.68 g/t Au.	Unassigned	Aho, 1956; Clark, 1969; Christopher and Robinson, 1975; B.C. Minfile, 1985, 1989; Dawson and others, 1991.	Consists of seventeen deposits that occur in three types of pipe-like orebodies. Deposits extend 3 km along strike. Deposits consist of: (1) zoned, with disseminated pyrrhotite, pentlandite and chalcopyrite that show evidence of forming by magmatic segregation; (2) Massive pyrrhotite, pentlandite and chalcopyrite confined to fault and contact zones; and (3) narrow vein-like tabular bodies with limited aureole.  Chromite occurs in sulfides in at least one orebody.  Twenty-eight orebodies are known with production  from twenty-two.  Deposits hosted in an elongated stock-like ultramafic body interpreted as earliest phase of the mainly dioritic Spuzzum Pluton (95-120 Ma).  Maximum grades are 2.6% Ni, 0.9% Cu, 1.0% Cr, 0.1% Co, 0.68 g/t Au, 2 g/t Pt and 7.2 g/t Pd.  Proven and probable reserves are 5.07 million tonnes grading 0.4% Ni and 0.14% Cu.  Deposit age interpreted as Cretaceous.	Canada

M10-29	Giant Copper (Canam, A.M.)	M	10	29	49 09 48N	121 01 24W	49.1633333333333	-121.023333333333	4910'N	12101'W	Porphyry Cu-Mo	Cu, Mo	Au, Ag	Medium.  Reserves of 22.9 million tonnes grading 0.75% Cu, 0.41 g/t Au, 12 g/t Ag.	Fish Lake-Bralorne 	B.C. Minfile, 1985, 1990; EMR Canada, 1989; Bethlehem Resources Ltd., annual report, 1990.	Consists of chalcopyrite, pyrrhotite, pyrite and arsenopyrite that occur in a vertical, elongate, pipe-like body that intrudes metasedimentary and metavolcanic rocks of the Jurassic Dewdney Creek Group.  Host rocks intruded locally by quartz diorite of the Invermay stock.  A copper equivalent (CuE) of 1.21% is estimated for a potential open pit mine (one of three proposed by operators, Bethlehem Resources Ltd.) with a stripping ratio of 4.5:1.  Uraninite and monazite are reported.  Deposit age interpreted as Cretaceous. 	Canada

M10-30	Lodestone Mountain Area	M	10	30	49 28 00N	120 50 12W	49.4666666666667	-120.836666666667	4928'N	12050'W	Zoned mafic-ultramafic Fe-V	Fe, V	PGE	Medium.  Reserves of 81.65 million tonnes grading 17.56% Fe.	Copper Mountain (South)	Findlay, 1969a, b; B.C. Minfile, 1985, 1988; St. Louis and others, 1986; EMR Canada, 1989.	Consists of titaniferous magnetite and ilmenite that occur in pods and lenses and as disseminated grains in pyroxenite of the Tulameen layered mafic-ultramafic (Alaskan type) complex.  Deposit formed primarily by  magmatic differentiation.  Minor Pt reported.  Report Ti content of magnetite of 1%.  An additional 249 million tons of possible and inferred ore is estimated. Deposit age interpreted as Early Jurassic.	Canada

M10-31	Copper Mountain (Ingerbelle, etc.)	M	10	31	49 19 54N	120 32 00W	49.3316666666667	-120.533333333333	4920'N	12032'W	Porphyry Cu-Au	Cu	Au, Ag, PGE	Large.  Production, resource, and reserves of 435 million tonnes grading 0.44%Cu, 0.14 g/t Au.	Copper Mountain (South)	Fahrni and others, 1976; B.C. Minfile, 1990; McMillan, 1991; P. Holbeck, Cordilleran Roundup, written commun., 1995.	Consists of chalcopyrite and bornite that occur as disseminations and in stockworks in Late Triassic alkaline intrusive rocks of the Copper Mountain Suite and similar age volcanic and volcaniclastic rocks of the Nicola Group.  This and similar deposits in the Copper Mountain area occur along a northwest trend for over 4 km.  Main orebodies are the Copper Mountain, Pits 1-3, Ingerbelle East, Ingerbelle, Virginia and Alabama.  Production, to 1994, of 108 Mt of ore yielded 770,000 t Cu and 21.8 t Au.  Reserves are 127 million tonnes of 0.38% Cu, 0.16 g/t Au and 0.63 g/t Ag.  Resources of 200 Mt at 0.4% Cu equivalent, are estimated. Deposit age interpreted as Early Jurassic.	Canada

M10-32	Hedley Camp (Nickel Plate, Mascot, etc)	M	10	32	49 21 54N	120 02 00W	49.365	-120.033333333333	4922'N	12002'W	Au skarn	Au, Ag	Cu, Co, Zn	Medium.  Reserves of 5.07 million tonnes grading 3.0 g/t Au, 2.5 g/t Ag, 0.1% Cu.	Guichon	B.C. Minfile, 1990; Ray and Webster, 1991; Ettlinger and others, 1992; Ray and others, 1993; Ray and  Dawson, 1994.	Consists of pyrrhotite, arsenopyrite, pyrite, chalcopyrite and sphalerite with trace galena, native Bi, native Au, electrum, tetrahedrite, native Cu, molybdenite and cobaltite. Hosted in calc-silicate skarn associated with contact metamorphism of limestone of the eastern sedimentary facies of the Upper Triassic Nicola Group adjacent to the Early Jurassic Hedley diorite and gabbro intrusives.  Production (1904-1991) from 8.43 Mt ore was 62.68 t Au and 14.74 t Ag from Nickel Plate, Mascot, French, Goodhope and Canty. Deposit age interpreted as Early Jurassic.	Canada

M10-33	Mt.Sicker Area (Lenora-Tyee, Twin J, Lara, Copper Canyon)	M	10	33	48 52 06N	123 47 18W	48.8683333333333	-123.788333333333	4852'N	12347'W	Kuroko Zn-Pb-Cu massive sulfide	Cu, Zn, Ag	Au, Pb, Ba	Medium.  Production and reserves of 33.5 million tonnes grading 0.78% Cu, 20.23 g/t Ag, 1.25 g/t Au.	Mount Sicker	EMR Canada, 1989; B.C. Minfile, 1990; Dawson and others, 1991; Hoy, 1991.	Consists of massive pyrite, chalcopyrite, sphalerite, galena with barite hosted in felsic volcanic tuffs of the McLaughlin Ridge Formation (Sicker Group).  Reserves and production for the Lenora-Tyee-Twin J deposit are 594,852 tonnes grading 2.46% Cu, 3.85% Zn, 0.37% Pb, 117.0 g/t Ag and 2.5 g/t Au.  Reserves for the Lara deposit are 529,000 tonnes grading 1.01% Cu, 5.87% Zn, 1.22% Pb, 100.1 g/t Ag and 4.73 g/t Au.  Reserves for the Copper Canyon deposit are 32.4 million tonnes grading 0.75% Cu, 8.57 g/t Ag and 1.17 g/t Au.  Deposit age interpreted as Late Devonian. 	Canada

M10-34	Jordan River (Sunro)	M	10	34	48 26 54N	124 01 54W	48.4483333333333	-124.031666666667	4827'N	12402'W	Gabbroic Cu	Cu, Ag, Au	Mo	Medium.  Production and reserves of 2.8 million tonnes grading 1.24% Cu, 1.7g/t Ag, .67g/t Au.	Unassigned	Stevenson, 1950; B.C. Minfile, 1983, 1990.	Consists of chalcopyrite, pyrrhotite, pyrite and minor molybdenite with trace pentlandite, native copper and cubanite. Deposit hosted in shear zones within Eocene Metchosin Volcanics associated with and adjacent to gabbro dikes.  Minor ore minerals also occur in the gabbro dikes.  Production between 1962 and 1974 was 1,329,034 tonnes with processing of 2,262,651 g of Ag, 899,273 g of Au and 13,754,271 kg of copper.  Reserves of 1.47 million tonnes grading 1.43% Cu.  Deposit age interpreted as Eocene. 	Canada

M10-35	Hi-Mars (Lewis Lake)	M	10	35	49 56 48N	124 21 06W	49.9466666666667	-124.351666666667	4957'N	12421'W	Porphyry Cu-Mo	Cu, Mo		Medium.  Estimated 82 million tonnes grading 0.3% Cu, minor Mo.	Gambier	BCDM GEM 1972, p.272; George Cross Newsletter no. 49, March 10, 1978.	Consists of chalcopyrite and molybdenite that occur as disseminations and fracture fillings in granodiorite of the Coast Plutonic Complex.   Companion silicificic and potassic alteration. Deposit age interpreted as Late Cretaceous.	Canada

M11-01	Ruddock Creek	M	11	01	51 46 42N	118 57 00W	51.7783333333333	-118.95	5147'N	11857'W	Sedimentary exhalative Zn-Pb	Zn, Pb, Ag	F, Ba	Medium.  Reserves of approximately 5.0 million tonnes grading 7.5% Zn, 2.5% Pb.	Monashee	Hoy, 1982a; B.C. Minfile, 1986; Dawson and others, 1991.	Consists of three mineralized zones with banded sphalerite, pyrrhotite, galena, pyrite and minor chalcopyrite and local barite and fluorite occur as discontinuous folded lenses and layers over a strike length of several kilometers. Hosted in schist, calc-silicate gneiss, quartzite and marble of Late Proterozoic age.  Deposit age interpreted as Late Proterozoic. 	Canada

M11-02	Rexspar (Birch Island)	M	11	02	51 33 48N	119 54 18W	51.5633333333333	-119.905	5134'N	11954'W	Felsic plutonic U-REE	U, F, Sr, REE, Th		Medium.  Reserves of 1.1 million tonnes grading 1.55% U3O8 , 30% CaF.	Kootenay-Shuswap	Northern Miner, September 6, 1977; Preto, 1978; B.C. Minfile, 1985; R.T. Bell, written commun., 1992; Mining Review, 1992.	Consists of three zones of uranium-thorium-fluorite and one zone of fluorite. Zones occur in an alkalic volcanic succession of probable Late Paleozoic age.  Mineralization probably syngenetic with the host rocks and derived from deuteric, volatile-rich fluids associated with the later stages of  alkalic plutonic-volcanic igneous activity.  Commercial grades of uranium mineralization are associated with fluorphlogopite-pyrite replacement of trachytic alkali-feldspar porphyry.  Fluorite reserves of 1.36 million tonnes of 30% CaF.  Deposit age interpreted as Mississippian. 	Canada

M11-03	Harper Creek	M	11	03	51 31 12N	119 49 00W	51.52	-119.816666666667	5131'N	11949'W	Cyprus massive sulfide	Cu, Ag, Au	Mo,Pb,Zn	Medium.  Reserves of 96 million tonnes grading 0.41%Cu, 2.5g/t Ag, 0.04g/t Au, 0.016% Mo.	Kootenay-Shuswap	B.C. Minfile, 1987, 1989;  Preto and Schiarizza, 1985; Schiarizza and Preto, 1987; Mining Review, 1992.	Consists of disseminated pyrite, pyrrhotite and chalcopyrite with minor molybdenite, galena, sphalerite, and tetrahedrite that occur in tabular zones. Hosted in mafic metavolcanics and quartz-sericite phyllites of the Devonian Eagle Bay Formation.  Deposit is stratabound at a regional scale. Locally, mineralization crosses bedding and schistosity.  Skarn origin suggested (Schiarizza and Preto, 1987)  with a relation to Devonian intrusive rocks, now metamorphosed to orthogneiss.  Deposit consists of two parts: (1) the East Zone with reserves of 42.5 million tonnes grading 0.39% Cu, 2.4 g/t Ag, and 0.044 g/t Au; and (2) the West Zone with reserves of 53.5 million tonnes grading 0.42% Cu, 2.6 g/t Ag and 0.047 g/t Au.  Deposit age interpreted as Devonian(?). 	Canada

M11-04	Cottonbelt	M	11	04	51 26 48N	118 49 18W	51.4466666666667	-118.821666666667	5127'N	11849'W	Sedimentary exhalative Pb-Zn	Pb, Zn, Ag	Cu, Mo	Medium.  Reserves of 725,760 tonnes grading 6% Pb, 5% Zn, 60 g/t Ag.	Monashee	Hoy, 1982a; B.C. Minfile, 1987; MacIntyre, 1991.	Consists of coarse grained sphalerite, magnetite, galena and minor pyrrhotite and molybdenite in a dark green calc-silicate assemblage of garnet, diopside, calcite, dolomite and quartz that occur parallel to bedding. Hosted in calcareous metasedimentary rocks in layers up to 2 m thick and occurs intermittently over a strike length of 5 km.  Deposit age interpreted as Late Proterozoic.	Canada

M11-05	Goldstream (Pat)	M	11	05	51 37 30N	118 25 42W	51.625	-118.428333333333	5138'N	11826'W	Besshi massive sulfice	Cu, Zn, Ag		Medium.  Reserves of 3.2 million tonnes grading 4.5% Cu, 3.1% Zn, 20 g/t Ag.	Kootenay-Shuswap	Hoy, 1979, 1991; B.C. Minfile, 1987.	Consists of massive pyrrhotite, chalcopyrite and sphalerite often exhibiting gneissic texture with sub-rounded quartz, phyllite and carbonate inclusions. Deposit occurs as a thin, conformable sheet (400 x 1500 x 1-3m thick) and as several other horizons in sericite qquartzite and calcareous and chloritic phyllite in the lower Index Formation of the Cambrian Lardeau Group. Host metavolcanic-phyllite unit consists of mafic tholeiitic volcanic rocks, massive greenstone, chloritic phyllite, ultramafic pods and dark calcareous to pelitic schist.  427,886 tonnes of ore were mined in 1983 and 1984 averaging 8.9 g/t Au, 4.43% Cu and 0.12% Zn.  Production restarted in 1992.  Reserves at the start of 1994 were 1 million tonnes grading 4.3% Cu, 2.9 % Zn, and 12 g/t Ag.  Deposit age interpreted as Cambrian. 	Canada

M11-06	Rea Gold (Hilton)	M	11	06	51 08 48N	119 49 12W	51.1466666666667	-119.82	5109'N	11949'W	Kuroko Zn-Pb-Cu massive sulfide	Ag, Pb, Zn, Au, Cu		Medium.  Reserves of 376,385 tonnes grading 76 g/t Ag, 2.2% Pb, 2.3% Zn, 6.1g/t Au, 0.5% Cu.	Kootenay-Shuswap	Hoy and Goutier, 1986; B.C. Minfile, 1987; Hoy, 1991.	Consists of two massive sulfide (pyrite, arsenopyrite, sphalerite, galena, chalcopyrite, and tetrahedrite) and barite lenses. Hosted in a succession of Upper Devonian to Lower Carboniferous mafic to intermediate volcanic and volcaniclastic rocks with minor associated chert and phyllite (Eagle Bay Formation).  Gold occurs in the massive sulfides and in  barite and in informally-named "footwall" stockwork zone.  Deposit age interpreted as Devonian and Carboniferous. 	Canada

M11-07	Homestake (Squaam Bay)	M	11	07	51 06 42N	119 49 42W	51.1116666666667	-119.828333333333	5107'N	11950'W	Kuroko Zn-Pb-Cu massive sulfide	Ag, Pb, Zn, Au, Cu, Ba		Medium.  Reserves of 919,420 tonnes grading 248 g/t Ag, 2.5% Pb, 4% Zn, 0.55% Cu.	Kootenay-Shuswap	Hoy and Goutier, 1986; B.C. Minfile, 1989; Dawson and others, 1991; Hoy, 1991.	Consists of two tabular sulfide-barite horizons that occur in intensely quartz-sericite-pyrite altered sericite schist derived from felsic (tuffaceous units of andesite, dacite and rhyolite) of the Devonian Eagle Bay Formation.  Sulfides include tetrahedrite, galena, sphalerite, pyrite and chalcopyrite.  Deposit overlain by intermediate to felsic volcanics of Eagle Bay Formation. Rea Gold volcanogenic deposit occurs in same unit about 4 km to northwest.  Reserves include 275,500 tonnes grading 36.7% Ba.  Deposit age interpreted as Late Devonian.	Canada

M11-08	Mount Copeland	M	11	08	51 07 48N	118 27 36W	51.13	-118.46	5108'N	11828'W	Porphyry Mo	Mo	Pb, Zn, Cu	Medium.  Reserves of 180,000 tonnes grading 1.82% MoS2 and production of 171,145 tonnes grading 0.75% MoS2.	Monashee	McMillan, 1973; Okulitch and others, 1981; B.C. Minfile, 1986.	Consists of molybdenite, pyrite, pyrrhotite, bornite, chalcopyrite and galena that occur along the northern boundary of a large mass of nepheline syenite gneiss flanking the southern boundary of the Frenchman's Cap Dome, one of several gneissic domes flanking the eastern margin of the Shuswap Metamorphic Complex.  Deposit hosted in irregular lenses of aplite and pegmatitic syenite.  U-Pb zircon isotopic age of 773 Ma.  Deposit age interpreted as Late Proterozoic. 	Canada

M11-09	River Jordan (King Fissure)	M	11	09	51 07 30N	118 24 42W	51.125	-118.411666666667	5108'N	11825'W	Sedimentary exhalative Zn-Pb	Pb, Zn, Ag		Medium.  Reserves of 2.6 million tonnes grading 5.1% Pb, 5.6% Zn, 35 g/t Ag.	Monashee	Hoy, 1982a; B.C. Minfile, 1985; MacIntyre, 1991.	Consists of stratabound layers and lenses (1 to 6-m thick) of fine grained sphalerite and pyrrhotite with eye-shaped lenses of watery grey quartz and scattered grains of pyrite and galena. Deposit hosted in Late Proterozoic, amphibolite-grade calc-silicate gneiss, quartzite and marble of the Monashee metamorphic complex.  Deposit age interpreted as Late Proterozoic. 	Canada

M11-10	Mastadon (J&L)	M	11	10	51 14 30N	118 07 12W	51.2416666666667	-118.12	5115'N	11807'W	Sedimentary exhalative Pb-Zn (?)	Zn, Pb, Au, Ag		Medium.  Production and reserves of 12.27 million tonnes grading 4.9% Zn, 2.3% Pb, 62 g/t Ag, 7.83 g/t Au.	Kootenay 	Cordilleran Geology and Exploration Roundup, 1990; Mining Review, 1992.	Consists of pyrite, arsenopyrite, sphalerite, galena and sulfosalts that occur in bands, lenses and stringers from 0.1 to 12 meters wide.  Hanging wall part of deposit consists of disseminated sphalerite, galena and pyrite; footwall part of deposit consists of massive arsenopyrite, sphalerite and pyrite.  Ore minerals are concentrated along the contact between phyllite and limestone.  Gold is refractory and associated with arsenopyrite.  Deposit hosted in Lower Cambrian Hamill Formation quartzite and Badshot Formation limestones with limestone forming the footwall for deposit.  Deposit origin is poorly understood.  Deposit age interpreted as Early Cambrian.	Canada

M11-11	Monarch (Kicking Horse)	M	11	11	51 24 48N	116 26 12W	51.4133333333333	-116.436666666667	5125'N	11626'W	Southeast Missouri Pb-Zn	Zn, Pb, Ag		Medium.  Production and reserves of 820,000 tonnes grading 5.63% Pb, 8.85% Zn, 31 g/t Ag.	Cathedral	Hedley, 1950; Hoy, 1982a; B.C. Minfile, 1985.	Consists of argentiferous galena, sphalerite and pyrite that occur in vertical,north-south-striking fissures along the east limb of an anticline. Hosted in partially brecciated and dolomitized limestone of Middle Cambrian Cathedral Formation.  Mineralization extends along a strike length of over 1370 meters.  Deposit age interpreted as Middle Cambrian.	Canada

M11-12	Parson	M	11	12	51 01 18N	116 39 00W	51.0216666666667	-116.65	5101'N	11639'W	Ba vein	Ba		Medium.  Production of 75,000 tonnes (1957 to 1988).  Grade not available.	Southern Rocky Mountain	B.C. Minfile, 1985, 1991; Leitch, 1991.	Consists of barite that occurs in two parallel fissure veins approximately 100 meters apart. Deposit occurs in quartzite underlain by shale and dolomite of the Lower Cambrian St. Piran and Lake Louise Formations.  Veins are exposed over a strike length of over 60 meters and have a maximum thickness of 10 meters.  Deposit was initially mined in an open pit, but has been developed underground since 1957.  Deposit age interpreted as Early Cambrian. 	Canada

M11-13	Trout Lake	M	11	13	50 38 18N	117 36 12W	50.6383333333333	-117.603333333333	5038'N	11736'W	Porphyry Mo	Mo	W, Cu, Pb, Zn	Medium.  Reserves of 50 million tonnes grading 0.23% MoS2.	Bayonne	Boyle and Leitch, 1982; B.C. Minfile, 1985.	Consists of molybdenite and pyrite in quartz veins; in addition, pyrrhotite, scheelite, chalcopyrite and quartz and lesser galena, sphalerite and tetrahedrite occur in peripheral skarns. Deposit hosted mainly in limestone, schist and quartzite of the Lower Paleozoic Lardeau Group. Minor part of deposit occurs as disseminations in altered granodiorite that is interpreted as equivalent to Jurassic to Cretaceous Kuskanax Batholith located nearby to the west and southwest. Deposit interpreted as Jurassic to Cretaceous. 	Canada

M11-14	Brisco Area	M	11	14	50 49 48N	116 19 48W	50.83	-116.33	5050'N	11620'W	Ba vein and breccia	Ba, Mg		Medium. Production of 140,323 (1947-73) grading 98.25% BaSO4.	Southern Rocky Mountain	British Columbia Ministry of Mines, Annual Report, 1964; Reesor, 1973; B.C. Minfile, 1985.	Consists of barite that occurs as a north-striking breccia zone in dolomite of the Lower Paleozoic Beaverfoot-Brisco Formation.  Deposit occurs on the east limb of a northwest-trending syncline cut by numerous faults of varying size.  Barite also occurs  locally in the Proterozoic Mount Nelson Formation as narrow veins.  Deposit age interpreted as Ordovician. 	Canada

M11-15	Big Ledge (Pingston Creek)	M	11	15	50 28 30N	118 03 00W	50.475	-118.05	5029'N	11803'W	Sedimentary exhalative Zn-Pb	Zn, Pb		Medium.  Reserves of 6.5 million tonnes grading 4% Zn.	Monashee	Hoy, 1982a; B.C. Minfile, 1985.	Consists of sphalerite, pyrrhotite galena and pyrite in lenses. Hosted in a dark, pyrrhotite and pyrite-rich, graphitic, calcareous schist that occurs along strike for approximately 10 km.  Schist part of paragneiss that is interpreted to be the amphibolite-grade metamorphic equivalent of the Late Proterozoic Windermere Group.  Deposit age interpreted as Late Proterozoic. 	Canada

M11-16	Mount Brussilof (Baymag)	M	11	16	50 47 18N	115 40 42W	50.7883333333333	-115.678333333333	5047'N	11541'W	Stratabound Mg	Magnesite		Large.  Reserves of 40.7 million tonnes grading 92.4% to 95% MgO.	Southern Rocky Mountain	Grant, 1987; B.C. Minfile, 1991; Simandl and Hancock, 1991.	Consists of magnesite replacements of Middle Cambrian carbonate rocks of the Cathedral Formation. Replacements form an irregular lens approximately 790 x 500 x 120 m.  Deposit age interpreted as Middle Cambrian. 	Canada

M11-17	Duncan Lake Area	M	11	17	50 21 48N	116 56 48W	50.3633333333333	-116.946666666667	5022'N	11657'W	Sedimentary exhalative Zn-Pb	Pb, Zn		Medium.  Reserves of 2.76 million tonnes grading 3.3% Pb, 3.1% Zn.	Kootenay 	Hoy, 1982a; B.C. Minfile, 1985.	Consists of galena, sphalerite and pyrite with minor pyrrhotite that occur in at least eight zones as bands, lenses and veins located preferentially in hinges of folds. Hosted in dolomites of the Lower Cambrian Badshot Formation.  Reserves are for the Duncan #6 ore zone.  Deposit age interpreted as Early Cambrian. 	Canada

M11-18	Windermere Creek (Western Gypsum)	M	11	18	50 28 48N	115 52 18W	50.48	-115.871666666667	5029'N	11552'W	Strataform gypsum	Gypsum		Medium.  Production and reserves of 10.8 million tonnes grading 83-93% CaSO4.	Southern Rocky Mountain	B.C. Minfile, 1986, 1991; BCGS, 1991.	Consists of gypsum and anhydrite that occur along the basal contact of the Devonian Burnais Formation composed of carbonate rocks. Production of 6.8 million tonnes are for four open-pit operations, the Windermere 1 to 4 pits, between 1947 and 1991.  Reserves of 4 million tonnes grading 80% CaSO4 are quoted for the Elkhorn zone that occurs about 400 meters south of the Windermere zone.  Deposit age interpreted as Devonian. 	Canada

M11-19	Kootenay River Gypsum	M	11	19	50 34 00N	115 15 30W	50.5666666666667	-115.258333333333	5034'N	11516'W	Strataform gypsum	Gypsum		Medium. Size not available.  Grades of more than 80% BaSO4.	Southern Rocky Mountain	B.C. Minfile, 1991.	Consists of gypsum that occurs along the basal contact of the Devonian Bernais Formation composed of carbonate rocks.  Deposit age interpreted as Devonian. 	Canada

M11-20	Millie Mack	M	11	20	50 02 30N	117 43 12W	50.0416666666667	-117.72	5003'N	11743'W	Au-Ag polymetallic vein	Au, Ag	Pb, Zn	Medium.  Reserves of 18.1 million tonnes grading 2.06 g/t Au, 68.6 g/t Ag.	Nelson	Western Miner, no. 11, p. 38, 1964; B.C. Minfile, 1985; Mining Review, 1990.	Consists of galena, tetrahedrite and sphalerite with minor arsenopyrite and native gold that occur in broken quartz veins hosted in graphitic slate and andesite of the Lower Jurassic Slocan Group of the Quesnellia terrane.  Porphyritic intrusive rocks occur nearby.  Deposit age interpreted as Eocene. 	Canada

M11-21	Silverton District (Sandon, Silver Ridge)	M	11	21	49 56 00N	117 18 00W	49.9333333333333	-117.3	4956'N	11718'W	Ag polymetallic vein	Ag, Pb, Zn	Cd	Medium.  Produced approximately 3.5 million tonnes grading  500 g/t Ag, 6% Pb (approximately).	Nelson	Goldsmith and Sinclair, 1983;  B.C. Minfile, 1985;  Beaudoin and others, 1992.	Consists mainly of sphalerite and galena disseminations and rare masses that occur in quartz veins within quartzites and argillites north of the contact of the Jurassic Nelson Batholith, and also within granitic rocks of the batholith south of the contact.  Recent isotopic studies  suggests an Eocene age for mineralized quartz veins in the district (Beaudoin and others, 1992).  District includes numerous small operations, including those in and around Sandon and Silverton. District produced more than 1,800 tonnes of Ag between the 1890's and present.  Deposit age interpreted as Eocene(?). 	Canada

M11-22	Ainsworth District	M	11	22	49 43 24N	116 55 00W	49.7233333333333	-116.916666666667	4943'N	11655'W	Ag polymetallic vein	Zn, Pb, Ag		Medium.  Produced 698,751 tonnes grading 7.9% Pb, 253.2 g/t Ag.	Nelson	Goldsmith and Sinclair, 1983;  B.C. Minfile, 1985;  Beaudoin and others, 1992.	Consists of sphalerite and galena with lesser tetrahedrite that occur in quartz veins hosted by metasedimentary rocks of the Milford (Carboniferous), Kaslo (Triassic) and Slocan (Jurassic) Groups.  Recent isotopic studies suggest an Eocene age for quartz vein mineralization in the Ainsworth and Slocan areas (Kootenay Range).  Coordinates are based on one of 75 occurrences listed for the Ainsworth camp.  Deposit age interpreted as Eocene(?). 	Canada

M11-23	Riondel (Blue Bell)	M	11	23	49 45 42N	116 51 30W	49.7616666666667	-116.858333333333	4946'N	11652'W	Zn-Pb-Ag skarn and  manto 	Zn, Pb, Ag	Cu, Cd, Au	Medium.  Produced 4.82 million tonnes and reserves of 0.35 million tonnes grading 6.3% Zn, 5.2% Pb, 45 g/t Ag.	Nelson	B.C. Minfile, 1985, 1988; Hoy, 1980, 1982a; Nelson, 1991; Beaudoin and others, 1992.	Consists of sphalerite, galena, pyrrhotite, pyrite, arsenopyrite, chalcopyrite and knebelite that occur in replacement bodies and in veins controlled by bedding, fractures and open anticlinal culminations.  Hosted in limestone of the Paleozoic Lardeau Series near Mesozoic intrusive rocks of the Fry Creek Batholith.  Recently published isotopic studies suggests an Eocene age for mineralization in the district which includes the Riondel deposit.  Deposit age interpreted as Eocene(?). 	Canada

M11-24	Mineral King	M	11	24	50 20 24N	116 25 24W	50.34	-116.423333333333	5020'N	11625'W	Zn-Pb skarn and manto 	Zn, Pb, Ag	Cu, Cd, Ba	Medium.  Produced 2.1 million tonnes grading 4.12% Zn, 1.70% Pb, 24.8 g/t Ag.	Bayonne	Fyles, 1960; Hoy, 1982a; B.C. Minfile, 1985, 1991; Dawson and others, 1991.	Consists of sphalerite, galena and pyrite with bournonite (PbCuSbS3) and rare meneghinite that occur in steeply dipping pipes or along steeply dipping shears associated with a synclinal wedge between two faults.  Hosted in Middle Proterozoic Mount Nelson Formation  composed of dolomite and dolomitic quartzite. Deposit mined between 1928 and 1974. Current reserves of 72,576 tonnes grading 34.3 g/t Ag, 2.5% Pb and 4.5% Zn.  Deposit age interpreted as mid-Cretaceous. 	Canada

M11-25	Lussier River (United Gypsum)	M	11	25	50 03 00N	115 31 00W	50.05	-115.516666666667	5003'N	11531'W	Strataform gypsum	Gypsum		Medium.  Estimated 7 milion tonnes grading 100% gypsum.	Southern Rocky Mountain	B.C. Minfile, 1991.	Consists of gypsum that occurs as evaporite beds underlying carbonate rocks of the Devonian Burnais Formation.  Minor sulphur occurs locally.  Selenite occurs in fractures and faults.  Deposit age interpreted as Devonian. 	Canada

M11-26	Lassie Lake Area (Blizzard)	M	11	26	49 37 30N	118 55 00W	49.625	-118.916666666667	4938'N	11855'W	Paleoplacer U	U		Medium.  Reserves of 2.1 million tonnes (containing 4000 tonnes U) grading 0.227% U3O8.	Nelson	Sawyer and others, 1981; B.C. Minfile, 1985.	Consists of autunite and saleeite that occur in paleostream channels in Paleogene continental sedimentary rocks or basins that overly quartz monzonite of Cretaceous Valhalla Pluton.  Uranium minerals occur in oxidized facies of coarse-grained fluvial sedimentary rocks and in disseminated organic material in reduced, fine-grained sedimentary rocks.  Deposit age interpreted as Eocene. 	Canada

M11-27	Carmi Moly	M	11	27	49 31 06N	119 10 00W	49.5183333333333	-119.166666666667	4931'N	11910'W	Porphyry Mo	Mo, Cu	U, F	Medium.  Reserves of 44.5 million tonnes grading 0.13% Mo.	Nelson	B.C. Minfile, 1985; Dawson and others, 1991.	Consists of molybdenite and chalcopyrite that are disseminated in brecciated Lower Jurassic granodiorite that has been intruded by Eocene quartz monzonite porphyry (with a 50 Ma isotopic age) that also  contains part of deposit. Deposit occurs within a 2-km diameter annular-shaped pyritic zone.  Deposit age interpreted as Eocene. 	Canada

M11-28	Highland Bell (Beaverdell)	M	11	28	49 25 48N	119 02 42W	49.43	-119.045	4926'N	11903'W	Ag polymetallic vein	Ag, Pb, Zn	Au, Cu, Cd	Medium.  Produced 941,644  tonnes (1901-1992), grading 1060 g/t Ag, 1.14% Pb, 1.37% Zn.	Nelson	Watson and others, 1982; B.C. Minfile, 1985, 1989.	Consists of sphalerite, pyrite, galena, arsenopyrite, chalcopyrite and minor pyrargarite in quartz-calcite veins that occur along a northeast-trending, 3 km by 800 meter belt on the west slope of Mt. Wallace.  Majority of production (1,166 tonnes of Ag) from a Upper and Lower Lass vein system that occurs in granodiorite of the Jurassic West Kettle Batholith and adjacent turbidite rocks and pyroclastics of the Permian Wallace Formation.  Heat source for the mineralized veins interpreted as quartz monzonite of the Eocene Beaverdell Stock with a 50 Ma isotopic age.  Deposit age interpreted as Eocene. 	Canada

M11-29	Sullivan (Kimberley)	M	11	29	49 42 30N	116 00 18W	49.7083333333333	-116.005	4943'N	11600'W	Southeast Missouri Pb-Zn	Pb, Zn, Ag	Cd, Sn	Large (world class).  Production and reserves of 162 million tonnes grading 6.6% Pb, 5.7% Zn, 68 g/t Ag.	Purcell 	 Leitch and Turner, 1991, 1992; J. Lydon and Sullivan Team, Cordilleran Geology and Exploration Roundup,  Vancouver,  p. 6-7, 1995.	Consists of a laminated sulfide assemblage of galena, sphalerite and pyrite that has undergone metamorphic recrystallization and tectonically induced mechanical and chemical remobilization. Deposit located near a north-trending rift axis at an intersection with the east-west-trending, proto-Kimberley fault.  Sulfide deposition initially predated the Mine Sill, and was accompanied by extensive boron (tourmaline) alteration of marine sedimentary origin.  Ongoing hydrothermal activity from marine brines generated successive chlorite-pyrrhotite-muscovite and albite-chlorite-pyrite-sericite-calcite assemblages in ore zone and hanging wall and footwall, all coincident with gabbro dikes and sills.  Deposit hosted conformably within folded Middle Proterozoic turbidites of the Lower Aldridge formation of the Purcell Supergroup.  Turbidites fill an intracontinental extensional rift marine basin and are intercalated with tholeiitic Moyie Sills 1467+3 Ma (zircon U/Pb) old.  Deposit age interpreted as Middle  Proterozoic. 	Canada

M11-30	Marysville	M	11	30	49 35 30N	115 58 00W	49.5916666666667	-115.966666666667	4936'N	11558'W	Strataform magnesite	Magnesite		Large (estimated).  Tonnage not available.  Grade of 40 to 45% MgO.	Southern Rocky Mountain	B.C. Minfile, 1986, 1991; Grant, 1987.	Consists of conformable, interbedded magnesite that is hosted within quartzites of the upper 100 m of the Lower Cambrian Cranbrook Formation  Thickest bed ranges up to approximately 15 meters thick, exposed over strike length of 5.5 km.  Deposit age interpreted as Early Cambrian. 	Canada

M11-31	Phoenix-Greenwood District	M	11	31	49 05 24N	118 36 00W	49.09	-118.6	4905'N	11836'W	Cu-Au skarn	Cu, Au, Ag, Fe		Medium.  Production and reserves of 34.0 Mt grading 0.8% Cu, 1.1 g/t Au, 15 g/t Ag.	Bayonne	B.C. Minfile, 1985; Church, 1986; Schroeter and Lane, 1991.	Consists of chalcopyrite, pyrite, pyrrhotite, magnetite plus minor sphalerite and galena that occur in a garnet-rich calc-silicate skarn assemblage of andradite, clinozoisite, diopside and quartz. Skarn hosted by Triassic carbonate, clastic, and volcanic rocks of Quesnellia terrane in proximity to contacts with Middle Jurassic and mid-Cretaceous granitoid intrusive rocks.  Production figures are for 1893 to 1985, and include 270,000 tonnes Cu, 36 tonnes Au, and 117 tonnes Ag.  Deposit age interpreted as Middle Jurassic to Early Cretaceous. 	Canada

M11-32	Castle Mountain (Mastadon, Mabel)	M	11	32	49 00 30N	118 10 24W	49.0083333333333	-118.173333333333	4901'N	11810'W	Podiform Cr-Ni	Ni, Cr		Large.  Inferred resource of 354.7 million tonnes grading 0.24% Ni.	Unassigned	BCGS, 1979; B.C. Minfile, 1983.	Consists of  lenses and disseminations of chromite in an intensely serpentinized Cretaceous dunite dike that intrudes andesite and latite of the Early Jurassic Rossland Group. Deposit occurs about 400 meters from the intrusive contact with gneissic biotite granite of the Nelson Batholith.  A  large body of low-grade nickel mineralization occurs at some depth below the surface within serpentinized rock.  Ni minerals include nickeliferous magnetite, fine grained millerite and pentlandite.  Deposit age interpreted as Cretaceous. 	Canada

M11-33	Red Mountain Moly (Coxey, Novelty, Nevada)	M	11	33	49 05 24N	117 49 36W	49.09	-117.826666666667	4905'N	11750'W	Mo skarn	Mo	Au, Cu, W, Bi, Ag	Medium.  Production and reserves of 1.31 million tonnes grading 0.20% MoS2.	Bayonne	B.C. Minfile, 1991; Ray and Webster, 1991.	Consists of molybdenite, pyrrhotite, chalcopyrite, arsenopyrite, scheelite, pyrite, magnetite, bismuthinite, galena and sphalerite that occur in veins, disseminations and shears within skarn and contact-metamorphosed siltstone and breccia of the Pennsylvanian to Permian Mount Roberts Formation adjacent to contacts with Jurassic Trail Pluton.  Pyroxene-epidote-biotite skarn with minor garnet hosts a coarse-grained assemblage of molybdenite, lesser pyrite and sporadic scheelite adjacent to porphyritic quartz diorite sills and dikes related to the Trail Pluton.  Reserves in 1985 were 245,000 tonnes grading 0.22% Mo.  Deposit age interpreted as Jurassic. 	Canada

M11-34	Rossland (Le Roi, War Eagle)	M	11	34	49 04 36N	117 48 30W	49.0766666666667	-117.808333333333	4905'N	11749'W	Au-Ag polymetallic vein	Au, Ag	Cu	Medium.  Produced 7.62 million tonnes grading 15.2 g/t Au, 19 g/t Ag.	Rossland	Dawson and others, 1991; B.C. Minfile, 1991; Schroeter and Lane, 1991; Hoy and Dunne, 1992.	Gold deposits are divided into three types,  North belt, Main veins and South belt.  Most production (>80%) from the Rossland Camp was from the Le Roi, Center Star, Nickel Plate, War Eagle and Josie ore bodies that occur in the central portion of the Rossland Camp in the Main vein system (98% of Rossland Camp production).  Main vein consists of pyrrhotite and chalcopyrite in a gangue of quartz and calcite, 1% Cu (avg) in ore.  Main vein system consists of a series of en echelon veins that dip steeply north  and strike of 070  between two large north-trending lamprophyre dikes.  Structural control of veins is inferred by growth faults that were active during deposition of Rossland Group.  Total production from Rossland Camp between 1894 and 1941 was 84 tonnes of gold and 105 tonnes of silver. Deposits of the Rossland Camp are hosted preferentially in mafic volcanics of the Elise Formation of the Early Jurassic Rossland Group.  Deposit age interpreted as Jurassic. 	Canada

M11-35	Ymir-Erie Creek (Yankee Girl)	M	11	35	49 17 30N	117 11 00W	49.2916666666667	-117.183333333333	4918'N	11711'W	Au-Ag polymetallic vein	Au, Ag	Pb, Zn	Medium.  Produced 713,461 tonnes grading 12.4 g/t Au, 62.12 g/t Ag.	Rossland	Hoy and Andrew, 1988;  Little, 1960;  B.C. Minfile, 1991; Schroeter and Lane, 1991.	Consists of pyrite, galena, sphalerite and native gold, in a gangue of quartz, calcite and siderite.  Deposits occur along northeast-trending, northwest-dipping shear zones in folded metasedimentary rocks of the Triassic Ymir and lower Jurassic  Rossland Groups. Deposits occur near contacts with Jurassic Nelson intrusive rocks.  Deposit age interpreted as Jurassic.  	Canada

M11-36	H.B. (Zincton)	M	11	36	49 09 06N	117 11 54W	49.1516666666667	-117.198333333333	4909'N	11712'W	Sedimentary exhalative Pb-Zn	Zn, Pb, Ag	Cd, Au	Medium.  Produced 6.7 milion tonnes grading 3.91% Zn, 0.74% Pb, 4.42 g/t Ag.	Kootenay 	Fyles, 1970; Sangster, 1986; B.C. Minfile, 1991; MacIntyre, 1991; Hoy, 1982b.	Consists of pyrite and sphalerite that occur in narrow bands, irregular lenses or disseminations in dolomite of the Lower Cambrian Reeves Formation.  Local cross-zones contain fine-grained massive sulfides that commonly occur as matrix in a coarse breccia.  Breccia zones are related to thrust faults and are interpreted as secondary structures.  Much of the dolomite in the West orebody is altered to talc.  Deposit age interpreted as Early Cambrian. 	Canada

M11-37	Sheep Creek Area (Kootenay Belle, etc.)	M	11	37	49 08 24N	117 07 36W	49.14	-117.126666666667	4908'N	11708'W	Au-Ag polymetallic vein	Au, Ag, Pb, Zn	Cu, W	Medium.  Production and reserves of 1.8 million tonnes grading 15 g/t Au, 6 g/t Ag (approximately).	Rossland	B.C. Minfile, 1991; Panteleyev, 1991; Schroeter and Lane, 1991.	Consists of pyrite, sphalerite, galena, chalcopyrite and galena that occur in quartz veins within quartzite, argillite, and argillaceous quartzite of the Nevada and Nugget members of the Quartzite Range Formation.  Veins  controlled by northeast-trending faults that are particularly productive where they cross the axes of two north-trending anticlines.  Deposit age interpreted as Jurassic(?). 	Canada

M11-38	Emerald-Invincible	M	11	38	49 06 24N	117 13 36W	49.1066666666667	-117.226666666667	4906'N	11714'W	W skarn	W. Mo		Medium.  Produced 1.4 million tonnes grading 1.3% WO3.	Bayonne	Mulligan, 1984; B.C. Minfile, 1991; Ray and Webster, 1991.	Consists of scheelite, wolframite, molybdenite, pyrrhotite, pyrite and chalcopyrite that generally occur as disseminations, but locally occur as massive with pyrite and pyrrhotite. Deposit hosted in Lower Cambrian Laib Formation along the contact of the Reeves Member Limestone with the Emerald Member argillite, as well as along the contact of the limestone with Cretaceous Emerald and Dodger Stocks.  Garnet, diopside, tourmaline, powellite, calcite, biotite, K-feldspar, and sericite alteration is predominant; kaolinite, tremolite and silica alteration  also reported.  Production figures are approximate, but 7,416 tonnes of concentrate from the Emerald Tungsten, Feeney and Dodger workings have been reported and grade 0.5% to 1.5%.  Deposit age is mid-Cretaceous. 	Canada

M11-39	Jersey	M	11	39	49 05 54N	117 13 12W	49.0983333333333	-117.22	4906'N	11713'W	Sedimentary exhalative Pb-Zn	Zn, Pb, Ag	Cd	Medium.  Produced 7.7 million tonnes grading 3.49% Zn, 1.65% Pb, 3.08 g/t Ag.	Kootenay 	Fyles, 1970; Hoy, 1982a; Sangster, 1986;  MacIntyre, 1991;  Dawson, 1995.	Consists of fine grained sphalerite and galena with pyrite, pyrrhotite and minor arsenopyrite in five ore bands ranging from 0.30 to 9 meters thick.  Sulfides occur more abundantly in fold troughs relative to fold crests.  Cadmium is associated with sphalerite, silver with galena.  Classified as carbonate-hosted sedimentary exhalative deposits of Kootenay Arc type that are hosted within the folded Reeves Member dolomites of the Lower Cambrian Laib Formation. Alternate skarn genesis of some deposits is proposed.  Deposit age interpreted as Early Cambrian. 	Canada

M11-40	Reeves-MacDonald (Reemac)	M	11	40	49 01 30N	117 21 06W	49.025	-117.351666666667	4902'N	11721'W	Southeast Missouri Pb-Zn	Zn, Pb, Ag	Cd, Cu, Ga, Ge	Medium.  Produced 5.9 million tonnes grading 3.48% Zn, 1.38% Pb, 3.39 g/t Ag.	Kootenay 	Fyles and Hewlett, 1959; Hoy, 1982b; Sangster, 1986; B.C. Minfile, 1991;	Consists of banded honey-colored sphalerite, pyrite and galena, and  locally contorted and brecciated, that occur as stratabound massive sulfides on limb of an anticlinal fold in dolomitized limestone of the Lower Cambrian Laib Formation.  Past producer from 1912 to 1978.  Reserves in 1978 of 36,287 tonnes grading 0.1% Pb.  Deposit age interpreted as Early Cambrian. 	Canada

M11-41	Moyie (St. Eugene)	M	11	41	49 17 06N	115 49 30W	49.285	-115.825	4917'N	11550'W	Ag polymetallic vein	Pb, Ag	Zn, Au	Medium.  Produced 1.5 million tonnes grading 7.74% Pb.  Reserves grading 125.1 g/t Ag, 0.05 g/t Au, 1% Zn.	Purcell	 Mathews, 1944; B.C. Minfile, 1983, 1986; Schroeter and Lane, 1991.	Consists of galena, sphalerite, pyrite, pyrrhotite and magnetite in quartz veins that are hosted by turbidites of the Middle Proterozoic Middle Aldridge Formation.  Sulfides occur along an east-west striking fracture zone that dips 70 degrees south.  Fracture zone crosses axial plane of a large, regional-scale, northeast-plunging anticline.  Production occurred between 1899 and 1929.  Deposit age interpereted as Middle Proterozoic. 	Canada

M11-42	Vine	M	11	42	49 24 00N	115 49 00W	49.4	-115.816666666667	4924'N	11549'W	Ag-Au polymetallic vein	Pb, Zn, Ag, Au		Medium.  Reserves of 1.37 million tonnes grading 4.65% Pb, 2.39% Zn, 50 g/t Ag, 1.8 g/t Au.	Purcell	Hoy and Pighin, 1995.	Consists of a steeply dipping, pyrrhotite-rich polymetallic Ag-Au vein that occurs along a fault in siltstone and wacke of the lower and middle Aldridge formation.  Vein is mineralized over at least 1 km of strike and to a depth of 800 m.  A Moyie gabbro dike closely follows the fault-vein structure.  Deposit minerals are pyrrhotite, sphalerite and galena that are intergrown in a quartz-calcite gangue.  Alteration minerals that occur in and adjacent to the vein are sericite, calcite, chlorite, quartz and minor albite.  Vein and gabbro dike occupy the same stratigraphic interval as the nearby Sullivan deposit.  Deposit age itnerpreted as Middle Proterozoic. 	Canada

M52-01	Khingan	M	52	01	48 59 23N	131 14 59E	48.9897222222222	131.249722222222	4859'N	13115'E	Sn greisen   	Sn		Medium.  Average content of 0.6-0.7% Sn. Mined since 1960's.  	Khingan	Ognyanov, 1986.	Deposit consists of over 15 ore zones that range from 10 to 50 m across and 100 to 400 to 500 m depth that occur in an symmetrical breccia zone about 250-300 m across. Breccia zone is traced to depths of over 1200 m.  At the upper levels of the deposit, the breccia is replaced by chlorite, and at depths of 700 to 800 m, the breccia is replaced by quartz-muscovite (sericite)-topaz greisen. Ore assemblage is quartz-fluorite-cassiterite. Arsenopyrite, marcasite, loellingite, chalcopyrite, and bismuth minerals are subordinate. Deposit is of hypabyssal origin and occurs in a pipe-shaped ore bodies of hydrothermal explosion breccia that cut a sequence of felsic volcanic rocks. The deposit is interpreted as related to subalkaline potassium granite with K-Ar isotopic age of 80-90 Ma. 	Russia

M52-02	Dzhalinda	M	52	02	49 08 59N	131 25 18E	49.1497222222222	131.421666666667	4909'N	13125'E	Rhyolite-hosted Sn   	Sn	In	Small. Contains up to 30% Sn and up to 0.5% In.  	Khingan	Ognyanov, 1986.	Consists of irregular ore pods that are emplaced in rhyolite that is intensely altered to beresite (quartz, sericite, and pyrite).  Deposit is located over a vertical interval of 10 to 20 m, in a volcanic vent and in the immediately adjacent rhyolite cover.  Volume of deposit less than 100-150 m3.  Sn occurs in cassiterite (wood tin) and associated with quartz, along with minor pyrite and arsenopyrite.  Local dzhalindite that forms intergrowths in wood tin.  Deposit is genetically related to the volcanic rocks with K-Ar isotopic ages of 90-95 Ma.	Russia

M52-03	Verkhnebidzhanskoe	M	52	03	48 37 25N	131 29 42E	48.6236111111111	131.495	4837'N	13130'E	Sn quartz vein   	Sn		Small.   Average grade of 0.3-2.0% Sn.  	Khingan	Ognyanov, 1986.	Consists of metasomatic quartz-sulfide lenses that range from 50 to 80 m length along strike, and extend up to 70 m downdip with a maximum thickness of 10 to 12 m. The deposit extends for about 1,300 m. Predominante late-stage ore minerals are mainly sulfosalts (boulangerite, jamesonite). Subordinate, earlier-stage ore-minerals are quartz, cassiterite, and arsenopyrite. Alteration minerals include talc, calcite, siderite, and dolomite. Both the sedimentary and volcanic rocks are extremely rich in Sn (up to 10 clarkes). A Late Cretaceous rhyolite porphyry stock, that contains geochemically anomalous Sn (about 0.005%), is interpreted as the source for the vein Sn that formed during hydrothermal alteration. Deposit hosted in Late Proterozoic dolomite adjacent to a rhyolite porphyry stock, and occurs at a tectonic contact of the dolomite with Late Proterozoic schist. 	Russia

M52-04	Yuzhno-Khingan	M	52	04	48 38 37N	131 52 36E	48.6436111111111	131.876666666667	4839'N	13153'E	Ironstone	Fe		Medium   	South Khingan	V.A. Yarmolyuk and A.P. Glushkov, written commun., 1966.	Consists of several stratiform iron deposits that occur in the lower portion of the Early Cambrian Khingan series composed of interbedded cherty, carbonaceous, and micaceous shale, siltstone, dolomite sandstone, limestone, ferruginous quartzite, manganese ore, sedimentary breccia, and conglomerate. Braunite-haussmanite-rhodochrosite ore occurs in beds 2 to 9 m thick in the lower part of the series. Fe- and Mn-bearing beds occur in the middle part of the Khingan series and consists of   magnetite, hematite, and magnetite-hematite quartzites that are interlayered with chlorite-dolomite breccia, Quartzites occur in beds from 18 to 26 m thick that are overlain by dolomite that is overlain in turn by shale, limestone, and dolomite.  Deposit is of exhalative-sedimentary origin.	Russia

M53-01	Ippatinskoe	M	53	01	51 30 00N	133 55 00E	51.5	133.916666666667	5130'N	13355'E	Sn quartz vein	Sn		Small.  Average  grade of 0.31% Sn and 0.19% WO3  in 6 largest veins. 	Badzhal-Ezop	Ognyanov, 1986. 	Consists of veins and selvages in the northern part of a large granitic body.  65 known veins range in thickness from 2 cm to 2  m, with strike lengths up to 290 m, and are prospected to a depth of 100 m.  Veins occur in a north-south-trending zone that is 3,000 m long and up to 300 m wide.  Deposit contains minor Cu, Ph, Sb, Pb, and Au.  Ore minerals are cassiterite, wolframite, arsenopyrite, along with rare chalcopyrite, pyrite, scheelite, sphalerite, and molybdenite; and very rare bismuthinite and beryl.  Gangue minerals are quartz, muscovite, feldspar, fluorite, and rare tourmaline.  Deposit is related to fine-grained leucogranite, with K-Ar isotopic age of 75 to 90 Ma.  	Russia

M53-02	Pravourmiiskoe	M	53	02	50 26 08N	134 14 58E	50.4355555555556	134.249444444444	5026'N	13415'E	Sn greisen   	Sn	W, Cu	Medium.  Average grade of 0.1-5 % Sn, 0.05% WO3 , and 0.5% Cu.  	Badzhal-Ezop	Ognyanov, 1986.	Consists of disseminations and in veins that occur in a linear area over 1500 m long, 5 to 25 m thick, and extends several hundred m down dip.  In addition to Sn, W, and Cu; Bi, Pb, and Sb are present.  Earler ore assemblage, of quartz-topaz-cassiterite with fluorite, followed by quartz-arsenopyrite-chalcopyrite, and quartz-tourmaline with cassiterite and stibnite.  Gangue composed of quartz-siderophyllite (zwitters) with quartz-topaz greisen. Deposit hosted in Late Cretaceous felsic volcanic rocks that overlie the large, shallow, granite and leucogranite of Verkhneurmiisky batholith.  Deposit occurs along an east-west-trending thrust fault with small offset. Deposit is genetically related to Verkhneurmiisky granite and leucogranite complex  with K-Ar isotooic ages of 75 to 85 Ma.	Russia

M53-03	Loshadinayagriva (Main) 	M	53	03	50 33 14N	135 13 54E	50.5538888888889	135.231666666667	5033'N	13514'E	Sn quartz vein   	Sn	W	Small.   Average grade of 0.3 to 1.5% Sn, and up to 0.1% WO3 .  	Badzhal-Ezop	Ognyanov, 1986.	Consists of quartz-albite-muscovite hydrothermally altered rocks, with ore minerals in both quartz-tourmaline lenses and quartz.  Ore assemblages are: (1) cassiterite-quartz with wolframite and arsenopyrite; and (2) quartz-sulfide (galena-sphalerite-chalcopyrite, stannite, and stibnite).  Sulfides are very minor.  Deposit occurs in steeply-dipping north-south zone along a left-lateral strike-slip fault and associated tensional fractures.  Ore zones are 920 m long, vary from 1 to 2 to 10 to 12 m thick along the main fault, and extend from 480 and 600 m along  tensional fractures.  Deposit contains Sn, Cu, Pb, Zn, and Sb (a few tenths of a percent), and W.  Deposit related to a 75 to 85 Ma (K/Ar) diorite-granodiorite-monzonitic complex.	Russia

M53-04	Solnechnoe	M	53	04	50 47 32N	136 16 01E	50.7922222222222	136.266944444444	5048'N	13616'E	Sn quartz vein   	Sn	W, Cu	Medium.  Average grade of  0.56% Sn,  0.05% W, and  0.1% Cu.  Mined since 1960's(?).  Mostly exhausted.  	Badzhal-Ezop	Ognyanov, 1986.	Consists of highly altered quartz-tourmaline veins with numerous apophyses is related to a long north-south, left-lateral, strike-slip fault.  Deposit varies from 0.5 to 15 m thick, 800 m long, and extends to the depth more than 500 m below the surface. Five vertically-zoned mineral assemblages are distinguished, from bottom to top: (1) quartz-tourmaline;  (2) quartz-arsenopyrite-cassiterite with wolframite, bismuthinite, and scheelite;  (3) quartz-sulfide (pyrrhotite, chalcopyrite, and marcasite);  (4) quartz-galena-sphalerite; and  (5) quartz-carbonate.  Deposit is closely related to a K-rich granite phase of a gabbro-diorite-granodiorite complex with K-Ar isotopic ages of 75 to 80 Ma.	Russia

M53-05	Kapral	M	53	05	50 40 54N	136 07 47E	50.6816666666667	136.129722222222	5041'N	13608'E	Porphyry Mo	Mo	Cu, Sn	Small.  Contains up to 0.2% Cu, and up to 0.2% W.  	Badzhal-Ezop	Gonevchuk and Gonevchuk, 1980, 1983.	Consists of quartz-sulfide veinlets and veins, and disseminations of pyrite, pyrrhotite, molybdenite, chalcopyrite, sphalerite, galena, wolframite, and Bi minerals across an area of approximately 0.3 km2.  Cu and W contents increase with depth.  Deposit hosted in brecciated and altered host rocks and explored over an area 3 by 12 km. Deposit occurs along a fault zone at the margin of an intrusive dome and associated with Late Cretaceous sodic-pyroxene bearing granitic rock. Deposit occurs along contacts between granite and  surrounding Late Jurassic volcanic and sedimentary rocks.  Country rock is altered to quartz-sericite-chlorite, and locally to greisen.  	Russia

M53-06	Festivalnoe	M	53	06	50 40 43N	136 20 30E	50.6786111111111	136.341666666667	5041'N	13621'E	Sn quartz vein   	Sn	W, Cu, Bi, In, Ag	Medium.  Average grade of 0.4 to 1.0% Sn, 0.15%, WO3, 0.9% Cu,  0.04% Bi, and up to several tens g/t Au.  Mined since 1960's.  	Badzhal-Ezop	Ognyanov, 1986.	Deposit contains twenty-six veins associated with zones of quartz-tourmaline alteration. Ore bodies are up to 1 km long, and generally 3 to 7 m thick; with some up to 20 to 30 m thick.  Ore is complex, containing Sn, W , Cu, Bi, Ag, and economic levels of In.  Quartz-tourmaline forms earlier mineral assemblage that grades upward into: (1) quartz-cassiterite with arsenopyrite; (2) quartz-pyrrhotite-chalcopyrite with stannite, fluorite, and magnetite; and (3) quartz-galena-sphalerite; and quartz-fluorite-calcite.  Host rocks are generally altered to quartz-sericite with quartz-chlorite alteration in the upper parts of the deposit. Largest ore bodies are controlled by a north-south-trending, left-lateral, strike-slip fault. Mineralization is spatially related to the potassium-rich granite phase of a gabbro-diorite-granodiorite complex with K-Ar isotopic age of 70 to 90 Ma. However, age of mineralization interpreted as 70 to 75 Ma.	Russia

M54-01	Yasnoe	M	54	01	50 38 21N	142 26 45E	50.6391666666667	142.445833333333	5038'N	14227'E	Silica-carbonate Hg   	Hg		Small   	Sakhalin Island	Sidorenko, 1974.	Consists of veinlets and pods of cinnabar associated with quartz and pyrite alteration. Hosted in fractured and mylonitic zones in Late Paleozoic to Mesozoic jasper, basalt, and shale. 	Russia

M54-02	In' River 	M	54	02	50 32 32N	142 32 04E	50.5422222222222	142.534444444444	5033'N	14232'E	Volcanic-hosted Hg	W, Hg, Cu 	Ag, Au	Small.   Average grade of 0.01 to 0.03% W.  	Sakhalin Island	Sidorenko, 1974.	Consists of disseminations and veinlets that occur in quartz, quartz-sericite, and kaolinite-sericite-carbonate altered rocks.  Ore minerals are pyrite, marcasite, scheelite, chalcopyrite, galena, sphalerite, cinnabar, realgar, and electrum. Mid- and low-temperature propylitic alterations form outer facies of the hydrothermal alteration aureole.  Deposit is controlled by fracture zones in strongly silicified Neogene volcanic and subvolcanic mafic- and intermediate-composition rocks.	Russia

M54-03	Langeriiskoe	M	54	03	50 11 29N	143 04 13E	50.1913888888889	143.070277777778	5011'N	14304'E	Au quartz vein	Au		Small   	Central Sakhalin	V.Ya Danchenko, written commun., 1987.	Consists of lenticular bodies of fractured rock, and of quartz-sulfide veins that are controlled by zones of folding.  Deposit hosted in Permian and Triassic spilite and graywacke, Jurassic-Early Cretaceous slate, and Cenozoic volcanic rocks and chert.	Russia

M54-04	Svetlovskoe	M	54	04	50 09 27N	143 22 37E	50.1575	143.376944444444	5009'N	14323'E	Silica-carbonate Hg   	Hg		Small. Low Hg content.  	Sakhalin Island	Sidorenko, 1974.	Occurs in fracture zones at  contacts of gabbro with serpentinite.  Gabbro altered to listwanite.  Mercury either replaces quartz and carbonate in listwanite or forms pods of rich ore.  Average Hg content in the listwanite is low, generally a few hundredths of a percent.	Russia

M54-05	Lyukamskoe	M	54	05	49 58 23N	143 34 33E	49.9730555555556	143.575833333333	4958'N	14335'E	Volcanogenic Mn   	Mn		Small.  Average grade of 3 to 20% Mn, locally up to 50%.     	Aniva-Nabil	Sidorenko, 1974.	Occurs in jasper and limestone lenses hosted in a Jurassic and Cretaceous volcanic sequence.  Sheet-like ore bodies consist of hematite-rhodonite-quartz and rhodochrosite-quartz that are accompanied by surficial pyrolusite and psilomelane veinlets.  	Russia

M54-06	Ostrinskoe	M	54	06	49 43 47N	143 11 32E	49.7297222222222	143.192222222222	4944'N	14312'E	Silica-carbonate Hg   	Hg		Small. Up to several percent Hg.  	Sakhalin Island	Sidorenko, 1974.	Hosted in jasper, basalt, and shale of Late Proterozoic or possibly Mesozoic age. Occurs as veinlets in fracture zones and jasper beds, disseminations, and  cinnabar gouge.  Mineralized zones are up to 600 m long and 10 to 15 m thick. 	Russia

M54-07	Inskoe	M	54	07	48 51 41N	142 37 53E	48.8613888888889	142.631388888889	4852'N	14238'E	Volcanic-hosted Hg   	Hg	Au, W	Small.  From a few tenths of a percent to a few percent Hg.  	Sakhalin Island	Sidorenko, 1974.	Consists of a mercury-bearing opalitic complex defined by zones of hydrothermally altered rock with disseminated cinnabar, realgar, pyrite, marcasite, chalcopyrite, galena, sphalerite, scheelite, and gold. Hosted in altered Neogene quartzite and volcanic rocks.  Hg-bearing zones range from 1 to 10 m thick, with few to 30 to 35 m, and are up to 300 m long.	Russia

M54-08	Mopau	M	54	08	49 20 02N	138 46 57E	49.3338888888889	138.7825	4920'N	13847'E	Porphyry Sn   	Sn		Small.  Average grade of 0.3% Sn.  	Kema	Finashin, 1959; Usenko and Chebotarev, 1973.	Consists of lenticular zones in quartz-sericite rocks. Zones contain abundant veinlets of quartz-cassiterite, cassiterite-quartz-feldspar, quartz- cassiterite-chlorite, and quartz-cassiterite-arsenopyrite-chlorite. Veinlets range from paper-thin to 0.5 cm thick, locally up to 10 cm thick.  Where closely-spaced, veinlets form an intricate stockwork up to 100 m across with high Sn content.  Zones are over 400 m long, several tens of m thick. Some zones occur at contacts with diabase porphyry dikes.  Deposit extends to depths of more than 200 m.  Ore is sulfide poor and is easily concentrated.  Deposit hosted in a series of closely-spaced volcanic vents of rhyodacite breccia that is cut by intrusions of felsite porphyry and dikes of quartz porphyry.  Ore associated with a deep-seated felsic pluton.  Age of mineralization interpreted as Late Cretaceous to Paleogene.	Russia

M54-09	Nochnoe	M	54	09	48 34 24N	138 34 48E	48.5733333333333	138.58	4834'N	13835'E	Porphyry Cu   	Cu	Pb, Zn	Small   	Kema	Gavrilov and Mamaev, 1988.	Consists of a stockwork defined by a thick network of sulfide or quartz-sulfide veinlets containing pyrite, chalcopyrite, bornite, and covellite as disseminations and in small, massive pods. Galena, sphalerite, arsenopyrite, sulfosalts, and molybdenite occur sporadically.  Outer parts of the metasomatic aureole are mostly pyrite-bearing.  Azurite and malachite were observed in the oxidation zone with limonite alteration.  Deposit has not been explored at depth. Deposit related to a Late Cretaceous and Paleogene granite porphyry stock that grades into rhyolite at the periphery.  Deposit confined to stock. Concentrically zoned structure of the intrusion contains a hydrothermal alteration pattern that grades from the center to the periphery from quartz-sericite-biotite-feldspars to quartz-sericite rocks. Host clastic  rocks exhibit argillic alteratin at the contact with rhyolite.  The alteration aureole is 400 by 600 m thick.   	Russia

M54-10	Sukhoi Creek	M	54	10	48 11 52N	138 11 59E	48.1977777777778	138.199722222222	4812'N	13812'E	Porphyry Cu-Mo   	Cu, Mo	W, Au	Small. Up to 0.2% Cu and 0.01% Mo. 	Kema	Petrachenko and others, 1988.	Occurs in stockworks that are several hundred m in diameter and in altered zones. Polymetallic ore dominates in some stocksworks. Ore minerals are chalcopyrite, molybdenite, sphalerite, galena, cassiterite, scheelite, and pyrite. Significant Au and Ag values occur. Deposit hosted in Early Cretaceous sedimentary rocks that are overlain by Late Cretaceous volcanic rocks and are crosscut by ore-bearing granitic intrusions with a K-Ar isotopic age of 73 Ma. Mineralization is related to several granodiorite and granite stocks that are intensely hydrothermally altered. Quartz-sericite alteration and medium-temperature epidote-prehnite-chlorite propylitic alteration occur at the core and grade into micaceous-chlorite-carbonate propylite at the periphery. Granite is locally altered to quartz-muscovite greisen with tourmaline and sphene, and in a few places into a peculiar garnet-phlogopite rock with apatite. Host siltstone and sandstone are altered to orthoclase-actinolite-chlorite hornfels and the felsic extrusive rocks are altered to quartz and phyllite. Deposit not explored at depth.	Russia

M54-11	Moinskoe	M	54	11	48 05 48N	138 38 14E	48.0966666666667	138.637222222222	4806'N	13838'E	Porphyry Mo   	Mo	Cu, Zn	Small.  Up to 0.3% Cu and 0.3% Mo.  	Kema	Pertachenko and others, 1988.	Consists of chalcopyrite, sphalerite, galena, molybdenite, and rare ferberite that occur in zones of veinlets, disseminations, and veins. Zones contain galena, sphalerite, and molybdenite that are up to 3 m thick. Deposit occurs along a north-west trending fault zone about 3 km long that cuts a granite porphyry stock. Granite prophylitically altered to quartz, sericite, chlorite, and sulfide along feather joints. Quartz-sulfide and sulfide veinlets and thin veins occur in hydrothermally altered rocks. Disseminated pyrite occurs in altered rocks and in surrounding veins. Polymetallic ores occur mostly at the periphery of the stock. Deposit hosted in hypabyssal Late Cretaceous granite porphyry stock with numerous xenoliths of intrusive and metamorphic rocks and garnet nodules.  A leucocratic medium-grained granite body forms the central part of the pluton. Granitic rocks are oversaturated with alumina and contain moderate alkalies. Deposit not explored at depth.	Russia

M55-01	Russkoe	M	55	01	49 43 09N	144 03 19E	49.7191666666667	144.055277777778	4943'N	14403'E	Podiform Cr   	Cr		Small.  Up to 1 g/t Pt, up to 0.12 g/t Pd, and up to 3.8 g/t Ag.	Schmidt and Terpeniya Peninsulas	Sidorenko, 1974.	Consists of chromite in small lenses and veinlets up to 3 m long in serpentinized periodtite.  In addition to chrome spinel, deposit contains platinum, palladium, and silver. Hosted in Late Cretaceous volcanic and sedimentary rocks that are cut by small bodies of serpentinized peridotite. Occurs in the East Sakhalin Mountains.	Russia

M55-02	Rys'e	M	55	02	49 30 36N	144 00 56E	49.51	144.015555555556	4931'N	14401'E	Cyprus massive sulfide  	Cu, Pb, Zn		Small.  Average grade of 0.5-1% Cu, 0.1-0.2% Pb, and 0.1-0.2% Zn.  	Aniva-Nabil	Sidorenko, 1974.	Consists of a series of zones from 0.1 to 0.5 m thick that contain pyrite, chalcopyrite, sphalerite, galena, quartz, sericite, and chlorite. Hosted in Early Cretaceous clastic volcanic rocks and chert in the East Sakhalin Mountains.  	Russia

M56-01	Carpinsky Caldera	M	56	01	50 10 28N	155 27 43E	50.1744444444444	155.461944444444	5010'N	15528'E	Porphyry Mo   	Mo		Small.  Less then 0.01% Mo.  	Kuril	Petrachenko, 1978; Petrachenko and Petrachenko, 1978.	Consists of molybdenite that occurs as disseminations and in fine streaks in andesitic lava flows and tuff that display argillic and alunitie alteration. Deposit has dimensions of 100 by 150 m and occurs adjacent to dacite lava.  Cinnabar occurs in addition to molybdenite.  Mineralization age interpreted as Pliocene to Quaternary.	Russia

M57-01	Koshkina	M	57	01	50 43 35N	156 16 28E	50.7263888888889	156.274444444444	5044'N	15616'E	Polymetallic vein	Cu, Zn, Pb		Small   	Kuril	Petrachenko, 1978.	Deposit consists of bodies up to 200 m long that occur in hydrothermally altered rock adjacent to a granodiiorite and diorite intrusion. Bodies consist of closely-spaced sericite and hydromica veins and veinlets of variable composition. Veins and veinlets composed of quartz-tourmaline, quartz-chlorite-sericite, chlorite-carbonate with zeolite, and quartz-chlorite-epidote. Ore minerals are chalcopyrite, cleiophane, galena, stibnite, realgar, orpiment, arsenopyrite, pyrite, marcasite, hematite, and magnetite. Polymetallic and Sb-As ores are spatially separated and display different types of alteration. Mineralogy and metal content vary widely. Host rocks are propylitized up to epidote-chlorite facies, and are silicified. Propylitized granodiorite and diorite crops out in the middle part of the mineralized area. Alteration formed by sulfate and halogene-acid hydrothermal solutions. Deposit occurs at the northern part of Shumshu Island in an area of approximately 5  km2 in heavily altered Early-Middle Miocene volcanic rocks that are cut by numerous extrusive and intrusive rocks, all part of a volcano-plutonic complex. Age of mineralization interpreted as late Miocene(?).	Russia

M57-02	Ebeko	M	57	02	50 38 07N	156 03 29E	50.6352777777778	156.058055555556	5038'N	15603'E	Sulfur-sulfide	S, FeS2		Medium. Contains up to 20 to 45% S.	Kuril	Vlasov, 1971.	Consists of three deposit types:  (1) native sulfur in fumarole deposits on the slopes of Ebeko Volcano; (2) sulfur ooze in lacustrine deposits in craters; and  (3) disseminated metasomatic deposits of sulfur-sulfide ore in altered andesite and tuff, containing 20 to 45% S.  In addition to S, ore minerals are pyrite, marcasite, quartz, kaolinite, alunite, pyrophyllite, barite, illite, and opal.  Deposit occurs over an area of approximately 20 km2 on the slopes of Ebeko volcano. Largest deposit areas are 100 to 150 m long and 10 to 15 m thick.  Mineralization is related to fumerole and hydrothermal activity of Ebeko andesitic stratovolcano.	Russia

M57-03	Zaozernoe	M	57	03	50 29 37N	156 02 20E	50.4936111111111	156.038888888889	5030'N	15602'E	Sulfur-sulfide	S, FeS2		Medium.  Average content of 20-70% S.  	Kuril	Vlasov and Petrachenko, 1965.	Deposit consists of three types:  (1) sublimated;  (2) sulfur flows; and  (3) disseminated-metasomatic.  First and second types form irregular bodies that are a few tens of m long, from 5 to 6 m thick, and contain 50-70% S.  Ten of  ore bodies are explored.  Two occurrences of the third ore type range up to 15 m thick and 100 m length along strike, and are related to bodies of siliceous and opalized agglomerate and psephitic tuff. Some pipe-like bodies of sulfur-bearing quartz rock occur that are 1.5 to 2 m across and contain 20 to 35% sulfur.  Ore minerals are opal (45-50%), kaolinite (10-15%), alunite (15-20%), and pyrite.  In the other parts of caldera are sheet-like bodies consisting of quartz-opal, quartz-alunite, quartz, and opal-kaolinite sulfur-sulfide that occur in hydromica-pyrite rock.  Vertical extent of deposit is up to 150 m.  Deposit occurs in solfataric fields of the Zaozernaya caldera and the Bilibin andesitic volcano. Age of mineralization interpreted as Pliocene to Quaternary.	Russia

M57-04	Rifovoe	M	57	04	50 24 28N	156 01 58E	50.4077777777778	156.032777777778	5024'N	15602'E	Au-Pb-Zn epithermal vein	Au, Zn, Pb		Small.  Average grade of 35% Zn and 17% Pb, and up to 1.5 g/t Au.  	Kuril	Petrachenko, 1976.	Consists of several zones, each a few m thick, that occur in tectonic breccia. Zones consist of a series of parallel, steeply-dipping veinlets and veins up to 15 m thick. Ore minerals are sphalerite, galena, chalcopyrite, pyrite, and marcasite.  Gangue minerals are quartz, barite, sericite, adularia, and rarely opal.  Veinlets and veins are bordered by an aureole of disseminated sulfides.  Alteration of host rocks is zoned, and consist, from the core outward of quartz, quartz-adularia-montmorillonite, and albite-chlorite with carbonate. Temperature of ore deposition of 220 to 240C.   Host rocks are heavily altered by fumerole and hydrothermal activity. Deposit occurs in cliffs along the Pacific coast, over an area of approximately 0.8 km2, in Pliocene volcanic rocks that are intruded by diorite porphyry and trachyandesite dikes. Age of mineralization interpreted as Pliocene.	Russia

N03-01	Sedanka (Biorka)	N	03	01	53 45 00N	166 10 00W	53.75	-166.166666666667	5345'N	16610'W	Polymetallic vein	Zn, Pb, Cu	Au, Ag	Average grade of 6.8% Zn, 0.45% Cu, 0.29% Pb, 1.37g/t Au, 48 g/t Ag	Alaska Peninsula and Aleutian Islands	Webber and others, 1946.	Consists of disseminated sphalerite and pyrite, with minor galena and chalcopyrite along a fault zone striking east-northeast and dipping moderately south.  Quartz and ankerite gangue.  Fault zone with sulfides at least 1,000 m long, and up to 80 m thick.  Hanging wall is Tertiary diorite, footwall is greenstone.  	Alaska

N04-01	Kawisgag (Ivanof)	N	04	01	55 57 00N	159 24 00W	55.95	-159.4	5557'N	15924'W	Porphyry Cu and (or) polymetallic vein	Cu, Mo, Au		Grab samples with 0.2 to 1.0% Cu, up to 0.024% Mo, and 0.23 to 0.4 g/t Au.  Small tonnage	Alaska Peninsula and Aleutian Islands	R.F. Robinson, written commun., 1975; Frederic H. Wilson and Robert L. Detterman, written commun., 1985	Area of intense sericitic and weaker potassic alteration over an area of about 200 by 700 m in nonmarine fluvial volcanic sandstone and conglomerate of the lower Tertiary Tolstoi Formation and black siltstone of the Upper Cretaceous Hoodoo(?) Formation.  Minor propylitic alteration on periphery.  Sedimentary rocks intruded small stocks and dikes.  Alteration overprinted on contact-metamorphic aureoles around stocks.  Iron-stained area of about 2.5 km2.  	Alaska

N04-02	Canoe Bay	N	04	02	55 35 00N	161 16 00W	55.5833333333333	-161.266666666667	5535'N	16116'W	Au-Ag epithermal vein	Au, Ag	Hg, As, Pb, Zn	No data	Alaska Peninsula and Aleutian Islands	Gary L. Andersen, written commun., 1984; Frederic H. Wilson, written commun., 1985	Quartz-cemented breccia with gold in altered late Tertiary or Quaternary felsic intrusive and extrusive rocks consisting of rhyolite to rhyodacite porphyry, and vent, explosion, and lithic breccia.  Associated crystal tuff, and andesite to dacite dikes.  Core of deposit is marked by sericite, pyrite, argillic, and silica alteration grading outward into weak propylitic alteration.  Anomalous soil and rock values of Au, Ag, Hg, As, Pb, and Zn.  Intrusive rocks intrude shale, sandstone, and conglomerate of the Cretaceous Hoodoo(?) Formation.	Alaska

N04-03	Pyramid	N	04	03	55 37 00N	160 41 00W	55.6166666666667	-160.683333333333	5537'N	16041'W	Porphyry Cu	Cu, Au	Mo	Estimated 110 million tonnes grading 0.4% Cu, 0.03% Mo; trace of Au	Alaska Peninsula and Aleutian Islands	Armstong and others, 1976; Hollister, 1978; Wilson and Cox, 1983; Gary L. Anderson, written commun., 1984; Robert L. Detterman, oral commun., 1986	Disseminated molybdenite and chalcopyrite(?) in iron-stained dacite porphyry stocks and dikes of late Tertiary age.  Zonal alteration pattern with core of secondary biotite and about 3 to 10% magnetite, grading outward to envelope of quartz-sericite alteration.  Peripheral sericite filled fractures adjacent to stock.  Local oxidation and supergene enrichment blanket up to 100 m thick, mainly of chalcocite and covellite.  Deposit centered on 3 sq km area within stock.  Several smaller stocks nearby.  Stocks intrudes fine-grained clastic rocks of the Upper Cretaceous Hoodoo Formation, and Paleocene or Eocene to Oligocene Stepovak(?) or Tolstoi(?) Formation.  Sedimentary rocks contact metamorphosed adjacent to stock.  	Alaska

N04-04	San Diego Bay	N	04	04	55 33 30N	160 26 30W	55.5583333333333	-160.441666666667	5534'N	16027'W	Au-Ag epithermal vein(?)	Ag, Au, Cu, Pb, Zn		No data	Alaska Peninsula and Aleutian Islands	Gary L. Andersen, written commun., 1984	Area of propylitic, and local argillic or silicic alteration in middle Tertiary dacite flows, associated with Fe-stained area of 61 km2.  Rock samples from altered area contain 0.5% to 5.0% pyrite.  Numerous small quartz veins with anomalous Ag and Au, and minor Cu-, Pb-, and Zn-sulfides.  Quartz veins in altered middle Tertiary dacite.  Veins and altered area may be upper part of porphyry Cu deposit.  	Alaska

N04-05	Aquila	N	04	05	55 11 00N	160 40 00W	55.1833333333333	-160.666666666667	5511'N	16040'W	Au-Ag epithermal vein	Au, Ag		Grab samples with up to 7.8 g/t Au, 27 g/t Ag	Alaska Peninsula and Aleutian Islands	Gary L. Andersen, written commun., 1984	Quartz fissure vein system with gold in Tertiary andesite flows and tuffs.  Veins extend up to 2,700 m and occur along northeast-striking regional fractures, a few kilometers apart, and parallel to similar fractures that host the Apollo-Sitka deposit.  Deposit restricted to small ore shoots occurring at intersections of veins or where veins abruptly change strike.  Argillic and silicic alteration generally restricted to narrow envelopes around individual quartz veins.  	Alaska

N04-06	Apollo-Sitka	N	04	06	55 12 00N	160 37 00W	55.2	-160.616666666667	5512'N	16037'W	Au-Ag epithermal vein	Au, Ag, Pb, Zn, Cu		Produced about 3.3 million g Au from 435,000 tonnes ore grading 7.7 g/t Au.  Estimated 163,000 tonnes remaining.  Portions of drill core with up to 7.3 g/t Au, 240 g/t Ag	Alaska Peninsula and Aleutian Islands	Martin, 1905, Brown, 1947	Quartz-calcite-orthoclase veins and silicified zones with gold, galena, sphalerite, chalcopyrite, and native copper.  Veins and zones occur in intensely developed, northeast-striking fracture systems that extend to at least 420 m below surface.  At least eight major vein-fracture systems.  Veins range from a few centimeters to 7 m wide.  Higher grade parts of deposit occur in tensional flexures in the vein-fracture system.  Abundant quartz comb structures and euhedral crystal druses indicate vein formation at shallow depths.  Hosted in extensively propylitically altered Tertiary tuff and intermediate volcanic rocks.  Main production from 1894 to 1906.  About 5,100 m of underground workings.  Considerable exploration activity from late 1980's to the present.   	Alaska

N04-07	Shumagin	N	04	07	55 12 00N	160 35 00W	55.2	-160.583333333333	5512'N	16035'W	Au-Ag epithermal vein	Au, Ag		Estimated 540,000 tonnes grading 10.3 g/t Au, 34.3 g/t Ag; includes 256,000 tonnes grading 14.6 g/t Au and 54.9 g/t Ag	Alaska Peninsula and Aleutian Islands	Gary L. Anderson, written commun., 1985	Quartz fissure system with gold hosted in middle Tertiary (Miocene?) andesitic volcanic rocks.  Estimated tonnage in area 2,700 m long, 610 m wide, and 120 m deep.  Fissure system occurs on same northeast-southwest-trending structure as Aquila deposit.  Extensive drilling in 1982 and 1983 and some activity since.  	Alaska

N08-01	Union Bay (Cleveland Peninsula)	N	08	01	55 47 30N	132 12 00W	55.7916666666667	-132.2	5548'N	13212'W	Zoned mafic-ultramafic Cr-PGE	Fe, V, Ti, Cr, PGE		Large.  Estimated 1,000 million tonnes grading 18 to 20% Fe; also numerous chromite andpossible V occurrences.  Grab grade 0.093 g/t Pt, 0.20 g/t Pd. 	Klukwan-Duke	Ruckmick and Noble, 1959; Berg, 1984; Brew and others, 1991.	Consists of magnetite and chromite that are disseminated in dunite, and chromite, and also occur as discontinuous stringers in dunite. Deposit hosted in a mid-Cretaceous, concentrically zoned mafic-ultramafic complex with a dunite core, named the Union Bay ultramafic pluton.  Magnetite and chromite are primary segregations.  PGE occur with chromite and magnetite in dunite. Hand-picked specimens of chromite average 0.093 g/t Pt, 0.200 g/t Pd, 0.062 g/t Rh and 0.215 g/t Ir.  Dunite occurs in pipe and lopolith in center of the ultramafic pluton that intrudes Upper Jurassic and Lower Cretaceous flysch of Gravina-Nutzotin overlap assemblage.  Peridotite also occurs with dunite; pyroxenite and hornblende pyroxenite occur on periphery of pluton.

	Canada

N08-02	Kasaan Peninsula (Mount Andrew)	N	08	02	55 30 54N	132 18 12W	55.515	-132.303333333333	5531'N	13218'W	Cu-Fe skarn	Cu, Fe	Au, Ag	Produced about 245,000 tonnes ore containing 5.81 million kg Cu, 215,800 g Au, 1.74 million g Ag.  Contains an estimated 2.7 million tonnes grading  2.37% Cu, 0.88 g/t Au, 7.1 g/t Ag.	Prince of Wales Island	Warner and others, 1961; Berg, 1984; Myers, 1985; Brew and others, 1991.	Consists of irregular to tabular masses of magnetite, chalcopyrite, and pyrite in gangue of calcite and calc-silicate skarn that occur in about 30 bodies along a 20-km-long belt. Skarns occur mainly along contacts between lower Paleozoic calcareous metasedimentary rocks and mafic metavolcanic rocks of the Descon Formation adjacent to irregular dikes, sills, and plugs of Ordovician or Silurian diorite, quartz monzodiorite, and mafic dikes.  Skarns to north are generally dominated by epidote-quartz endoskarn and pyroxene-garnet-epidote exoskarn with chalcopyrite, magnetite, and calcite.  Skarns to south generally consists of hornblende, magnetite, chalcopyrite, and pyrite with low Ag and Au. Considerable mining at various skarns. Several episodes of exploration.  Extensive underground workings.	Canada

N08-03	Bokan Mountain (Ross-Adams)	N	08	03	54 54 42N	132 08 18W	54.9116666666667	-132.138333333333	5455'N	13208'W	Felsic plutonic U-REE	U, Th, Be, Nb, Pb, REE		 Medium.  Produced about 109,000 tonnes grading about 1% U3O8; Th not recovered	Western-Southeastern Alaska	MacKevett, 1963; Statz, 1977; Thompson and others, 1982; Lancelot and de Saint-Andre, 1982; Armstrong, 1985; Edward M. MacKevett, Jr., written commun., 1986; J.  Dean Warner, written commun., 1987; Thompson, 1988; Warner and Barker, 1989; Brew and others, 1991; Berg, 1984.	Consists of disseminated U, Th, REE, and niobate minerals, including uranothorite, uranoan thorianite, uraninite, xenotime, allanite, monazite, pyrite, galena, zircon, and fluorite in irregular, steeply dipping pipe of Jurassic peralkaline granite.  Most of ore produced from crudely cigar-shaped upper part of pluton.  Central zone grades outward into normal granite.  Associated pegmatite and vein REE, Nb, Th, and U deposits in outer parts of granite or adjacent country rock that consists of early Paleozoic metamorphosed granitic and sedimentary rocks of Alexander terrane.  Intermittent mining from 1955 to about 1971.	Canada

N08-04	Cinola (Specogna, Babe)	N	08	04	53 31 42N	132 13 06W	53.5283333333333	-132.218333333333	5332'N	13213'W	Au epithermal vein	Au	Hg	Medium.  Reserves of 24.8 million tonnes grading 2.47 g/t Au.	Unassigned	B.C. Minfile, 1989; EMR Canada, 1989; Christie, 1989; Mining Review, 1992.	Consists of gold with pyrite, marcasite, chalcopyrite and cinnabar that occur in silicified zones associated with Miocene rhyolite porphyry dike intruded along a faulted contact between Cretaceous shale and Late Tertiary coarse-grained clastic sedimentary rocks. Silicification and mineralization are partly contemporaneous with clastic sedimentation, with 55% of deposit hosted in clastics, 2% in Cretaceous sediments 13% in rhyolite and 30% in polymictic hydrothermal breccias.  Deposit age interpreted as Miocene. 	Canada

N08-05	Tasu Sound (Wesfrob, Tasu, Garnet)	N	08	05	52 45 42N	132 02 42W	52.7616666666667	-132.045	5246'N	13203'W	Fe skarn	Fe, Cu		Medium.  Produced 22.6 million tonnes and reserves of 5.5 million tonnes grading 53.4% Fe, 0.26% Cu, 6.1 g/t Au.	Island Porphyry	Sutherland Brown, 1968; EMR Canada, 1989; Dawson and others, 1991.	Consists of massive magnetite-chalcopyrite skarn that is hosted in amygdaloidal greenstone of the Upper Triassic Karmutsen Group or near contacts with the Jurassic San Cristobal hornblende diorite pluton of the Island Suite.  Deposit age interpreted as Middle Jurassic. 	Canada

N08-06	Salt Chuck	N	08	06	55 38 00N	132 34 00W	55.6333333333333	-132.566666666667	5538'N	13234'W	Zoned mafic-ultramaficCu-Au-PGE	Cu, Pd, Pt, Au		Produced about 300,000 tonnes of 0.95% Cu, 1.2 g/t Au, 5.8 g/t Ag, 2.2 g/t PGE; mainly Pd and Pt.  Produced 610,400 g PGE.  Grab samples with up to to 0.57 g/t Pt, 1 g/t Pd	Prince of Wales Island	Howard, 1935; Gault, 1945; Donald Grybeck and David A.  Brew, written commun., 1985; Loney and others, 1987	Consists of iregularly and randomly distributed veinlets of bornite, with minor chalcopyrite, chalcocite, covellite, native copper, and magmatic magnetite.  Sulfides and oxides occur as disseminations and along cracks and fractures in pipe-like late Paleozoic or Mesozoic gabbro-clinopyroxenite stock intruding Silurian metagraywacke of Alexander terrane.  Clinopyroxenite and gabbro grade irregularly into one another.  Bornite forms principal sulfide; occurs mainly as interstitial grains in clinopyroxenite in amounts up to 15 percent.  Extensive development of late magmatic or hydrothermal epidote veins in gabbro and clinopyroxenite.  K-Ar age of 429 Ma for low-K, altered biotite from clinopyroxenite.  Deposit probably magmatic, but there is some to considerable hydrothermal deposition or remobilization of sulfides.  Mined from 1907 to 1941 from considerable underground workings and glory hole.  	Alaska

N08-07	Dawson	N	08	07	55 28 00N	132 42 00W	55.4666666666667	-132.7	5528'N	13242'W	Polymetallic vein	Au	Cu, Pb, Zn	Probably produced several ten thousand g Au and Ag each, and minor Pb.  Estimated 40,000 tonnes grading 34.3 g/t Au remain	Prince of Wales Island	Wright and Wright, 1908; Harris, 1985	Consists of several parallel quartz veins in zone up to about 7 m wide.  Most gold concentrated along contacts of veins and lower(?) Paleozoic black graphitic slate of Alexander terrane.  Scattered pyrite, sphalerite, chalcopyrite, and galena in veins.  Mined from 1900 to 1948 from several sites to a depth of at least 181 m.  Some surface activity and drilling in the 1980's.  	Alaska

N08-08	Khayyam	N	08	08	55 18 00N	132 23 00W	55.3	-132.383333333333	5518'N	13223'W	Kuroko massive sulfide	Cu, Au	Ag, Zn	Produced about 6.4 million kg Cu, 40,120 g Au, and 53,200 g Ag, from 205,000 tonnes ore.  Channel samples with up to 5.25% Cu, 6.9 g/t Au, 106 g/t Ag	Alexander	Fosse, 1946; Barrie, 1984a, b, 1988	Irregular, elongate, nearly vertical lenses of massive pyrite, with minor chalcopyrite, sphalerite, pyrrhotite, hematite, gahnite, and magnetite.  Gangue of quartz, calcite, epidote, garnet, and chlorite.  Seven stacked sulfide lenses up to 70 m long and 6 m thick.  Lenses conformable to enclosing felsic to mafic metavolcanic host rocks of the pre-Middle Ordovician Wales Group in the Alexander terrane.  Coarse fragmental textures in metavolcanic host rocks.  Intense chlorite alteration in footwall below sulfide lenses.  Lateral gradation between sulfide lenses and enclosing schist.  Several hundred meters of underground workings.  Principal mining from 1901 to 1907.	Alaska

N08-09	Jumbo district	N	08	09	55 15 00N	132 37 00W	55.25	-132.616666666667	5515'N	13237'W	Cu-Au skarn	Fe, Ag, Au, Cu, Mo		Jumbo: Estimated 280,000 tonnes of 45% Fe, 0.73% Cu.  Produced 4.6 million kg Cu, 220,000 g Au, and 2.73 million g Ag from 111,503 tonnes ore	Western-Southeastern Alaska	Kennedy, 1953; Herreid and others, 1978	District includes major deposit at Jumbo, and several small deposits including Magnetite Cliff, Copper Mountain, and Corbin, and lesser deposits at Upper Magnetite, Gonnason, Houghton, Green Monster, Hetta, and Corbin.  Deposits all within a few kilometers of Jumbo deposit.  Deposits occur in or adjacent to lower Paleozoic marble and pelitic metasedimentary rocks of the Wales Group, intruded by mid-Cretaceous hornblende-biotite granodiorite (concordant hornblende and biotite K-Ar ages of 103 m.y.).  Jumbo deposit:  chalcopyrite, magnetite, sphalerite, and molybdenite in skarn at contact between marble and Early Cretaceous granodiorite stock.  Gangue is mainly diopside and garnet.  More than 3.2 km of underground workings.  By far the largest deposit in the district, with major production.  Magnetite Cliff:  25-m-thick shell of magnetite that mantles Early Cretaceous granodiorite in contact with garnet-diopside skarn.  Skarn contains 2% to 3% chalcopyrite, resources are estimated at 335,600 tonnes of 46% Fe and 0.77% Cu.  Production from 1902 to 1922.  Copper Mountain:  Scattered chalcopyrite and copper carbonate occurrences in diopside endoskarn with veins and masses of  epidote, garnet, magnetite, and scapolite near granodiorite.  Produced 101,800 kg Cu, 321,300 g Ag, and 4,510 g Au between 1902 and 1907. About 410 m of tunnels and shafts.  	Alaska

N08-10	Moonshine	N	08	10	55 11 00N	132 23 00W	55.1833333333333	-132.383333333333	5511'N	13223'W	Carbonate-hosted massive sulfide	Ag, Pb	Zn, Cu	Produced up to 46,500 g Ag.  Grab samples with 20 to 83% Pb, 411 to 1,030 g/t Ag	Alexander	Wright, 1909; Herreid and others, 1978	Massive galena with sphalerite, and minor chalcopyrite, and accessory pyrite in well-defined fissure veins and lenses up to a few meters wide in a dolomitized breccia that obliquely cuts across marble and metasedimentary rocks.   Wall rocks part of the pre-Middle Ordovician Wales Group in Alexander terrane.  Gangue of quartz, siderite, and calcite.  Diabase dikes locally cut veins and wall rocks.  Several tunnels and shafts.  Minor production between 1900 and 1909. 	Alaska

N08-11	Lime Point	N	08	11	55 03 00N	132 38 00W	55.05	-132.633333333333	5503'N	13238'W	Bedded barite	Ba		Estimated 4,500 tonnes grading 91% barite	Alexander	Twenhofel and others, 1949; Herreid and others, 1978	Lenses of barite up to 2 m thick are interlayered with the pre-Middle Ordovician dolomitic marble of the Wales Group.  Rocks faulted and folded; and andesite dikes intruded along faults.  One short adit.  Test shipments; no production.	Alaska

N08-12	Niblack	N	08	12	55 04 00N	132 09 00W	55.0666666666667	-132.15	5504'N	13209'W	Kuroko massive sulfide	Cu, Au, Ag		Produced about 636,000 kg Cu, 34,200 g Au, 466,500 g Ag.  Contains 6 m thick ore zones with 4.9% Cu, 8.0% Zn, and 9.2 g/t Au	Alexander	Herreid, 1964; W.C. Block, written commun., 1989	Lenticular masses and disseminations of chalcopyrite, pyrite, and lesser sphalerite, galena, hematite, and magnetite in mainly quartz-sericite schist derived from pre-Ordovician(?) felsic volcanic or volcaniclastic rocks.  Felsic metavolcanic rocks interlayered with intermediate to mafic metavolcanic rocks and lesser slate.  Host rocks part of the pre-Middle Ordovician Paleozoic Wales Group in Alexander terrane.  Workings consist of a 100-m shaft and about 1.6 km of underground workings.  Main mining from 1902 to 1909.  Recent development. 	Alaska

N08-13	McLean Arm district	N	08	13	53 49 00N	132 01 00W	53.8166666666667	-132.016666666667	5349'N	13201'W	Porphyry Co-Mo	Co, Mo		Higher grade veins and strockwork range from 0.4-5.6% Cu, 0.01-0.08% Mo, and 2.1-11.0 g/t Au. Anomalous Ag, Pt, Bi, Te, and base metals also occur. Possible 40 million tonnes ore at Apex. 	Prince of Wales Island	MacKevett, 1963; F.D. Forgeron and L.W. Leroy written commun., 1971; Nokleberg and others, 1995.	Consists of a group of stockworks and veins at Polson, Ickis, Veta, Apex, and Stone Rcck vein. Stockworks and veins occur mainly along joints and faults that strike north-northeast or west-northwest and dip steeply. Stockworks, veins, joints, and faults interpreted as related to a concentric alteration zone of about 5 km2 area that contains a carbonate-albite center and an albite-sericite rim. Stockworks and veins hosted in northwest-trending belt of middle Paleozoic, multi-phase plutonic complex of pyroxenite, syenite, and quartz monzonite. Central part of complex containing the deposits is mainly syenite. Altered, mineralized synenite at Stone Rock Bay has a U-Pb zircon isotopic age of 436 Ma. Plutons intrude clastic rocks of the Descon Formation, part of the Alexander terrane, on the southern tip of Prince of Wales Island.	Alaska

N08-14	Gold Standard (Helm Bay)	N	08	14	55 39 00N	132 00 00W	55.65	-132	5539'N	13200'W	Au quartz vein	Au		Probably produced a few ten thousand g Au	Juneau	Wright and Wright, 1908	Two sets of quartz veins with less than 1% gold, pyrite, galena, and tetradymite.  Principal vein about 300 m long and up to 2 m thick cuts metamorphosed upper Mesozoic phyllitic flysch and andesite tuff of Gravina-Nutzotin belt.  Most ore came from older set of veins that are parallel to foliation of host rocks.  Younger veins that parallel strike, but dip in opposite, direction contain little gold.  	Alaska

N09-01	Prosperity-Porter Idaho	N	09	01	55 54 30N	129 56 12W	55.9083333333333	-129.936666666667	5555'N	12956'W	Ag-Pb-Zn  polymetallic vein	Ag, Pb, Zn		Medium.  Reserves of 826,277 tonnes grading 669 g/t Ag, 5% Pb+Zn.	Skeena	Alldrick, 1985; Alldrick and others, 1987; Prime Equities Inc., 1991; Schroeter and Lane, 1991.	Consists of galena, sphalerite, tetrahedrite and native silver that occur in narrow, irregular quartz veins in volcanics of the Jurassic Hazelton Assemblage, adjacent to the Eocene Hyder biotite granodiorite pluton  Production in 1922-50 totaled 2.36 million oz Ag.  Deposit age interpreted as Eocene. 	Canada

N09-02	Red Mountain	N	09	02	55 57 00N	129 42 00W	55.95	-129.7	5557'N	12942'W	 Au-Ag polymetallic vein	Au, Ag	Zn, Pb, Cu, Te, Bi	Medium.  Reserves of 2.5 million tonnes grading 12.8 g/t Au, 28.6 g/t Ag.	Texas Creek 	Northern Miner, February 22, 1993; Greig and others, 1994; Bray, 1994.	Consists of densely disseminated pyrite veinlets that are enveloped by variable amounts of pyrrhotite and sphalerite plus minor amounts of chalcopyrite, arsenopyrite, galena and tetrahedrite.  Alteration assemblages include sericite, K-feldspar, tourmaline and propylitic assemblages.  High gold values are associated with semi-massive, coarse grained pyrite.  Gold occurs as native metal, electrum and tellurides. Deposit contains twelve surface showings and three underground zones that are associated with the brecciated, sericitized and pyritized contact zone between the Lower Jurassic Goldslide quartz monzonite-granodiorite-diorite pluton and Lower Jurassic bimodal volcanic and volcaniclastic rocks of the Hazelton Group.  Deposit age interpreted as Early Jurassic. 	Canada

N09-03	Alice Arm Silver (Dolly Varden, North Star, Wolf, Toric)	N	09	03	55 44 12N	129 33 18W	55.7366666666667	-129.555	5544'N	12933'W	Kuroko Zn-Pb-Cu massive sulfide	Ag, Pb, Zn		Medium.  Production and reserves of 2.91 million tonnes grading 390 g/t Ag, 0.53% Pb, 0.82% Zn.	Coast	Devlin and Godwin, 1986; EMR Canada, 1989; Mining Review, 1992.	Consists of pyrite, sphalerite, galena, tetrahedrite, pyrargyrite and some native silver that occur in four deposits (Dolly Varden, North Star, Wolf and Toric). Deposits interpreted as structurally displaced portions of a once continuous siliceous baritic volcanogenic massive sulfide zone in Lower Jurassic volcanics (Hazelton?) within a roof pendant of the Coast Plutonic Complex.  Production from the Torbit (Toric) mine between 1928 and 1959 was 1.27 million tonnes grading 456 g/t Ag and 0.39% Pb.  Current reserves for the Dolly Varden, North Star, Torbit, and Wolf are 1.55 million tonnes grading 0.53% Pb, 0.82% Zn and 326 g/t Ag.  Deposit age interpreted as Early Jurassic.	Canada

N09-04	Quartz Hill	N	09	04	55 24 12N	130 28 30W	55.4033333333333	-130.475	5524'N	13029'W	Porphyry Mo	Mo		Large. Estimated 1,700 million tonnes of 0.136% MoS2.  Estimate 444 million tonnes with 0.219% MoS2 near surface.	Central-Southeastern Alaska	Hudson and others, 1979; Berg, 1984; P.R. Smith and J.E. Stephens, written commun., 1985; Brew and others, 1991.	Consists of a stockwork of molybdenite-bearing, randomly oriented quartz veins, and fractures, and disseminated molybdenite that are distributed throughout a multiply altered hypabyssal stock with an outcrop area of several square kilometers.  Stock consists of a shallow-level, multi-phase complex of granite porphyry, quartz porphyry, microgranite, and aplite of late Oligocene or early Miocene age. Stock intrudes the central granitic belt of the informally named Coast plutonic-metamorphic complex of Brew and Ford (1984).  Traces of uranium in accessory minerals in the porphyry. K-Ar age of hypabyssal granitic rocks about 27 m.y.	Canada

N09-05	Anyox Area (Hidden Creek, Bonanza)	N	09	05	55 26 30N	129 49 36W	55.4416666666667	-129.826666666667	5527'N	12950'W	Cyprus massive sulfide	Cu, Ag, Au	Fe	Medium.  Production and reserves of 26.7 million tonnes grading 1.48% Cu, 9.6 g/t Ag, 0.17 g/t Au.	Coast	Sharp, 1980; Grove, 1986; EMR Canada, 1989; Hoy, 1991; Smith, 1993.	Consists of chalcopyrite, pyrrhotite and pyrite that occur as pipe-like and sheet-like lenses within metamorphosed roof pendants of Early to Middle Jurassic pillowed tholeiitic volcanic and sedimentary rocks. Roof pendant is underlain by granitoids of the Coast Plutonic Complex.  Production from the Hidden Creek and Bonanza orebodies of 22.4 million tonnes with recoveries of 1.50% Cu, 9.61 g/t Ag and 0.17 g/t Au.  Similar copper and precious metal grades are reported for reserves.  Deposit age interpreted as Early and Middle Jurassic.	Canada

N09-06	Ajax	N	09	06	55 35 24N	129 24 00W	55.59	-129.4	5535'N	12924'W	Porphyry Mo	Mo	Zn, Pb, Cu, Ag	Large.  Reserves of 178.5 million tonnes grading 0.121% MoS2.	Skeena	Christopher and Carter, 1976; Soregaroli and Sutherland Brown, 1976; B.C. Minfile, 1989; EMR Canada, 1989.	Consists of molybdenum in quartz-vein stockwork that is hosted in Eocene quartz monzonite porphyry of Alice Arm Intrusions and adjacent hornfels zone in Jurassic argillaceous rocks.  Deposit occurs in four small, closely spaced plutons.  Total  reserves of 417.3 million tonnes grading 0.09% MoS2 with a very high stripping ratio.  A  biotite K-Ar age of 54.0 Ma  3 Ma age is reported.  Deposit age interpreted as Eocene.	Canada

N09-07	Bell Moly (Alice Arm)	N	09	07	55 27 42N	129 19 48W	55.4616666666667	-129.33	5528'N	12920'W	Porphyry Mo	Mo, W		Medium.  Reserves of 106 million tonnes grading 0.09% MoS2.	Skeena	Carter, 1982; EMR Canada, 1989.	Consists of molybdenite and minor scheelite that occur in quartz vein stockwork in Eocene quartz monzonite porphyry of the Alice Arm Intrusions and biotite hornfels in Jurassic metasedimentary and metavolcanic rocks. Deposit occurs in a crescent-shaped zone around the eastern portion of the Eocene stock.  Deposit age interpreted as Eocene. 	Canada

N09-08	Roundy Creek	N	09	08	55 24 48N	129 26 24W	55.4133333333333	-129.44	5525'N	12926'W	Porphyry Mo	Mo		Medium. Reserves of 8.4 million tonnes grading 0.15% MoS2.	Skeena	Christopher and Carter, 1976; Soregaroli and Sutherland Brown, 1976; Carter, 1982; B.C. Minfile, 1989; EMR Canada, 1989.	Deposit occurs in three zones: the Roundy Creek Zone that lies east of a major fault within quartz stockwork and as fracture fillings; and the Sunshine Creek and High Grade Zones  that lie west of the fault and occur as lens-like zones mainly in alaskite dikes.  Host rocks are quartz monzonite porphyry of the Eocene Alice Arm Intrusions and argillites and siltstones of the Late Jurassic Bowser Assemblage.  K-Ar age for the Alice Arm Intrusion of 52.5 Ma and 53.5 Ma. Deposit age interpreted as Eocene.  	Canada

N09-09	Kitsault (BC Moly)	N	09	09	55 25 18N	129 25 06W	55.4216666666667	-129.418333333333	5525'N	12925'W	Porphyry Mo	Mo	Ag, Pb, Zn, Cu	Medium.  Production and reserves of 113.3 million tonnes grading 0.184% MoS2.	Skeena	Woodcock and Carter, 1976; Carter, 1982; Steininger, 1985; B.C. Minfile, 1989; EMR Canada, 1989.	Consists of molybdenite in quartz vein stockworks that are related to an Eocene quartz monzonite and quartz diorite stock that intrudes Late-Jurassic-Early Cretaceous siltstones and greywackes of the Bowser Assemblage.  At least five phases of the stock are recognized.  Three stages of mineralization are  associated with intramineral dikes.  Molybdenum-bearing rocks form a ring structure around the stock in quartz veinlets.  Veinlets are cut by quartz veins, up to 3 meters wide and contain pyrite, galena, sphalerite, scheelite, chalcopyrite, tetrahedrite and pyrrhotite.  K-Ar age of 53.7  1.7 Ma for the porphyry. Between 1967 and 1972 production was 9.3 million tonnes grading 0.112% molybdenum.  Reserves in 1989 were 104 million tonnes grading 0.19% MoS2.  Deposit age interpreted as Eocene. 	Canada

N09-10	Mount Thomlinson	N	09	10	55 35 18N	127 29 12W	55.5883333333333	-127.486666666667	5535'N	12729'W	Porphyry Mo	Mo		Medium.  Reserves of 40.8 million tonnes grading 0.12% MoS2.	Skeena	Kirkham, 1964; Carter, 1982; EMR Canada, 1989.	Consists of molybdenite, chalcopyrite and pyrite occur with minor magnetite and scheelite that occur in a stockwork of veinlets near the northwest contact of a circular, Eocene quartz monzonite porphyry stock that intrudes argillaceous Jurassic sedimentary rocks. Deposit occurs predominantly within intrusive rocks along the northwest contact.  Host sedimentary rocks are deformed and metamorphosed into biotite, muscovite, cordierite and andalusite-bearing schists.  K-Ar isotopic age of 53.8  2.2 Ma.  Deposit age interpreted as Eocene.	Canada

N09-11	Red Rose	N	09	11	55 08 18N	127 36 00W	55.1383333333333	-127.6	5508'N	12736'W	W polymetallic vein	W, Au, Cu, Ag		Medium.  Reserves of 20,000 tonnes grading 5% WO3.	Bulkley	EMR Canada, 1989; Dawson and others, 1991.	Consists of scheelite, ferberite, chalcopyrite, molybdenite and uraninite that occur in a shear quartz vein.  Shear cuts one of three northeast-trending diorite dikes that intrude contact metamorphosed argillite and siltstone of the Red Rose Formation, near the contact with porphyritic granodiorite of the Cretaceous Rocher Deboule stock.  Deposit age interpreted as Cretaceous. 	Canada

N09-12	Dorothy	N	09	12	55 15 06N	126 10 06W	55.2516666666667	-126.168333333333	5515'N	12610'W	Porphyry Cu-Mo	Cu, Mo		Medium.  Resource of 40.8 to 160 million tonnes grading 0.25% Cu, 0.01% MoS2.	Skeena	B.C. Minfile, 1985; EMR Canada, 1989.	Consists of chalcopyrite, bornite and minor molybdenite that occur in narrow quartz-filled fractures, rimmed with potassium feldspar. Deposit hosted in a 7.6 meter-wide biotite-feldspar porphyry dike of quartz diorite to granodiorite composition that occurs along the contact with Jurassic Hazelton Group volcanics and sediments.  Deposit age interpreted as Late Cretaceous(?). 	Canada

N09-13	Morrison	N	09	13	55 11 24N	126 19 00W	55.19	-126.316666666667	5511'N	12619'W	Porphyry Cu-Au (Mo)	Cu, Ag, Au		Medium.  Resource of 86 million tonnes grading 0.42% Cu, 0.34 g/t Au, 3.4 g/t Ag, 0.017 Mo.	Skeena	Carson and Jambor, 1974; Carter, 1982; EMR Canada, 1989.	Consists of chalcopyrite and pyrite that occur in a stockwork of veinlets and fractures, and as disseminations in biotite-hornblende-plagioclase porphyry of the Eocene Babine Suite and in peripheral Jurassic sedimentary rocks.  Porphyry and intruded sedimentary rocks are displaced by a fault.  Deposit age interpreted as Eocene. 	Canada

N09-14	Bell Copper (Newman)	N	09	14	55 00 12N	126 13 48W	55.0033333333333	-126.23	5500'N	12614'W	Porphyry Cu-Au (Mo)	Cu, Au, Ag		Medium.  Production and reserves of 71.75 million tonnes grading 0.46% Cu, 0.23 g/t Au, 0.48 g/t Ag, 0.006 Mo.	Skeena	Carson and Jambor, 1974; Carson and others, 1976; Noranda Inc., annual report, 1990; B.C. Minfile, 1991; Butrenchuk, 1991.	Consists of chalcopyrite and lesser bornite that occur as disseminations and in quartz lenses and stockwork veinlets. Deposit hosted in biotite-feldspar porphyry of the Eocene Babine Intrusions and the adjacent Jurassic metasedimentary rocks and metavolcanic rocks of the Hazelton Group.  Two rock types are juxtaposed along the northwest-trending Newman fault.  K-Ar biotite isotopic age of 51.0 Ma for porphyry interpreted as age of deposit.  Ore zone exhibits pervasive potassic (mainly biotite) alteration with a surrounding concentric halo of chlorite and sericite-carbonate alteration. Alteration coincides with a two-km-wide pyrite halo that surrounds the deposit.  Better copper grades occur in a 60 x 90 m-thick, flat-lying deposit which is connected to a central pipe-like zone, centered on the western contact of the intrusion.  Past production was 28.7 million tonnes grading 0.46% Cu.  Reserves include the Extension zone.  A supergene chalcocite zone caps the deposit and extends to depths of 50 to 70 meters.  Deposit age interpreted as Eocene. 	Canada

N09-15	Granisle	N	09	15	54 56 42N	126 09 18W	54.945	-126.155	5457'N	12609'W	Porphyry Cu-Au (Mo)	Cu, Au, Ag		Large.  Production and reserves of 66.2 million tonnes grading 0.42% Cu, 0.12 g/t Au, 1.12 g/t Ag, 0.009 Mo.	Skeena	Kirkham, 1971; Carson and Jambor, 1974; Fahrni and others, 1976; EMR Canada, 1989; Dawson and others, 1991.	Consists of chalcopyrite, bornite and pyrite with low grade Au and Ag and local minor molybdenite that occur in quartz-filled fractures associated with Eocene Babine porphyry intrusions (avg. isotopic age 51.2 Ma) that intrude Lower Jurassic Hazelton Group volcanic and sedimentary rocks.  Deposit centered on the contact between biotite-feldspar porphyry and an earlier quartz diorite phase.  A central potassic alteration zone is enveloped successively by a quartz-sericite-carbonate-pyrite zone and by a chlorite-carbonate-epidote zone.  Deposit age interpreted as Eocene.	Canada

N09-16	Glacier Gulch (Hudson Bay Mountain)	N	09	16	54 48 48N	127 18 00W	54.8133333333333	-127.3	5449'N	12718'W	Porphyry Mo	Mo	W, Cu	Large.  Resource of 100 million tonnes grading 0.297% MoS2, 0.06% WO3.	Bulkley	Kirkham, 1967; Bright and Jonson, 1976; EMR Canada, 1989; BC Minfile, 1995.	Consists of molybdenite and minor scheelite that occur in stockwork and quartz vein swarms that are associated with a sheet-like granodiorite body and a later rhyolite porphyry plug. Igneous rocks intrude Jurassic Hazelton Group.  The strongest mineralization occurs in to a crudely layered granodiorite sheet in the volcanic pile.  Hydrothermal alteration patterns are irregularly developed.  Deposit age interpreted as Late Cretaceous. 	Canada

N09-17	Big Onion	N	09	17	54 48 36N	126 53 42W	54.81	-126.895	5449'N	12654'W	Porphyry Cu-Mo	Cu, Mo		Medium.  Reserves of 18 million tonnes grading 0.36% Cu.	Skeena	 Mustard, 1976; Carter, 1982; EMR Canada, 1989.	Consists of chalcopyrite, molybdenite and minor bornite that occur in a quartz stockwork and as disseminations in an Eocene pluton of the Nanika Suite and in the surrounding andesite of the Jurassic Hazelton Group.  The pluton is an elongate, complex intrusion, formed of two phases, an early quartz feldspar porphyry and a core of younger quartz diorite porphyry.  Highest copper grades are in the quartz diorite porphyry; highest molybdenum grades are  in quartz feldspar porphyry, and the pyrite occurs in volcanic rocks.  K-Ar age isotopic age of 48.7  1.9 Ma obtained from a post-mineral dike.  Deposit age interpreted as  Eocene. 	Canada

N09-18	Serb Creek	N	09	18	54 38 42N	127 45 18W	54.645	-127.755	5439'N	12745'W	Porphyry Mo	Mo		Medium.  Resource of 41.2 million tonnes grading 0.08% MoS2.	Skeena	Soregaroli and Sutherland Brown, 1976; EMR Canada, 1989; Dawson and others, 1991.	Conists of molybdenite that is widely distributed in fractures and quartz vein stockwork in the quartz monzonite core of an Eocene granodiorite stock that intrudes Hazelton Group volcanic rocks.  Deposit age interpreted as Eocene. 	Canada

N09-19	Lucky Ship	N	09	19	54 01 42N	126 59 12W	54.0283333333333	-126.986666666667	5402'N	12659'W	Porphyry Mo	Mo		Medium.  Reserves of 18.1 million tonnes grading 0.16% MoS2.	Skeena	Soregaroli and Sutherland Brown, 1976; Carter, 1982; EMR Canada, 1989.	Consists of molybdenite that occurs in a stockwork and fractures that are concentrated along the contact between two phases of an Eocene rhyolite porphyry plug that intrudes Jurassic sedimentary and volcanic rocks of the Hazelton Group.  Rhyolite porphyry consists of two porphyritic and two breccia phases.  Surrounding sedimentary and volcanic rocks are contact metamorphosed.  Silicification and molybdenum mineralization are most intense around the younger porphyritic phase where the stockwork is developed.  A pyrite halo surrounds silicification in an earlier porphyritic phase, and in breccia and the hornfels.  K-Ar isotopic age of 49.9+2.3 Ma obtained from biotite in hornfels.  Deposit has potential for open-pit mining.  Deposit age interpreted as Eocene. 	Canada

N09-20	Poplar	N	09	20	54 01 00N	126 59 12W	54.0166666666667	-126.986666666667	5401'N	12659'W	Porphyry Cu-Mo	Cu, Mo, Ag		Medium.  Reserved of 144.1 million tonnes grading 0.368% Cu, 0.10% MoS2, 2.8 g/t Ag.	Bulkley	Mesard and others, 1979; EMR Canada, 1989.	Consists of disseminated chalcopyrite and pyrite that occur in a Late Cretaceous biotite-monzonite porphyry stock.  Molybdenite occurs in veins with quartz and gypsum.  Porphyry stock intrudes Hazelton Group volcaniclastic and epiclastic rocks.  Deposit age interpreted as Late Cretaceous. 	Canada

N09-21	Nadina (Silver Queen)	N	09	21	54 05 18N	126 43 36W	54.0883333333333	-126.726666666667	5405'N	12644'W	Ag polymetallic vein	Zn, Pb, Ag, Au, Cu		Medium.  Reserves of 1.72 million tonnes grading 6.19% Zn, 328 g/t Ag, 2.7 g/t Au.	Skeena	EMR Canada, 1989; Leitch and others, 1990; Dawson and others, 1991.	Consists of sphalerite, galena and chalcopyrite that occur in a gangue of quartz, rhodochrosite, chalcedony and barite  in Late Cretaceous andesite and altered fragmental volcanic rocks.  Deposit age bracketed by porphyritic diorite and later felsite dikes and sills, similar to the Eocene Goosly Lake Intrusions.  Deposit age interpreted as Eocene.	Canada

N09-22	Equity Silver (Sam Goosly)	N	09	22	54 11 24N	126 15 42W	54.19	-126.261666666667	5411'N	12616'W	Ag polymetallic vein	Ag, Cu	Au, Sb, As	Medium.  Production and reserves of 32.1 milion tonnes grading 71.3 g/t Ag, 3.90 g/t Au.	Skeena	Church, 1971; Carter, 1982; B.C. Minfile, 1988; Northern Miner, March 28,1988; Schroeter and Lane, 1991.	Consists of pyrite, chalcopyrite, pyrrhotite and tetrahedrite, with minor sphalerite and galena and silver sulfosalts that are accompanied by argillic alteration.  Sulfides occur in veins, disseminations, and massive sulfide replacement bodies, up to 120 m thick, that are situated in tabular fracture zones roughly parallel to stratigraphy.  Reserves of 5,915,454 tonnes grading 72.01 g/t Ag, 0.82 g/t Au and 0.22% Cu.  Total gold content (production + reserves) estimated as 16,936,034 g (16.9 tonnes).    Deposit occurs between the two intrusives, the Cretaceous Skeena Assemblage sedimentary and pyroclastic rocks are intruded by a granitic stock (58 Ma) and a gabbro-monzonite stock (48 Ma) of the Goosly Lake Intrusions. Deposit age interpreted as Eocene. 	Canada

N09-23	Ecstall	N	09	23	53 52 24N	129 30 42W	53.8733333333333	-129.511666666667	5352'N	12931'W	Kuroko Zn-Pb-Cu massive sulfide	Zn, Cu, Au, Pb, Ag, Fe		Medium.  Reserves of 6.9 million tonnes grading 0.63% Cu, 2.6% Zn.	Tracy	 Bacon, 1953; B.C. Minfile, 1989; EMR Canada, 1989; Hoy, 1991.	Consists of pyrite, chalcopyrite, sphalerite, pyrrhotite, marcasite and galena that occur as two tabular massive stratabound lenses in Paleozoic schist, quartzite and granitoid gneiss remnants of the Nisling terrane within Coast Plutonic Complex.  Deposit occurs in a volcanic sequence close to a volcanic center.  Intense hydrothermal alteration consists of chlorite, sericite and silica.  Deposit age interpreted as Paleozoic. 	Canada

N09-24	Nanika (DW, New Nanik)	N	09	24	53 45 06N	127 41 06W	53.7516666666667	-127.685	5345'N	12741'W	Porphyry Cu-Mo	Cu	Mo	Medium.  Reserves of 18.14 million tonnes grading 0.437% Cu.	Skeena	George Cross Newsletter, no. 213, October 30, 1973; Carter, 1982; EMR Canada, 1989; B.C. Minfile, 1991.	Consists of chalcopyrite, pyrite, pyrrhotite, molybdenite and bornite that occur in dacite porphyry of the Jurassic Hazelton Group. Porphyry intrudes along a faulted contact with quartz monzonite of the Eocene Nanika Suite.  Sulfides occur as disseminations, fracture-fillings and veinlets.  Alteration minerals in the dacite are biotite, silica and chlorite.  Deposit age interpreted as Eocene.	Canada

N09-25	Berg	N	09	25	53 48 12N	127 25 48W	53.8033333333333	-127.43	5348'N	12726'W	Porphyry Cu-Mo	Cu, Mo	Pb, Zn, Ag, Au	Medium.  Reserves of 238 million tonnes grading 0.39% Cu, 0.05% MoS2, 2.84 g/t Ag.	Skeena	Panteleyev and others, 1976; Panteleyev, 1981; EMR Canada, 1989; Dawson and others 1991.	Consists of chalcopyrite, molybdenite and pyrite with minor sphalerite, galena and arsenopyrite. Deposit occurs within a fine-grained stockwork of quartz-filled veinlets that are distributed in a broad asymmetrical zone around a semicircular quartz-monzonite porphyry stock of the Eocene Nanika Suite and within the peripheral ,contact-metamorphosed Hazelton Group volcanic rocks.  Most intense molybdenum concentrations occur in the stock, most intense copper concentrations occur 60 meter beyond the contact. A pyrite halo occurs 300 - 600 meters from the contact.  Extensive oxidation, leaching and secondary enrichment is present.  Deposit age interpreted as Eocene.	Canada

N09-26	Whit (Whiting Creek)	N	09	26	53 45 30N	127 12 12W	53.7583333333333	-127.203333333333	5346'N	12712'W	Porphyry Mo-Cu	Mo, Cu		Medium.  Resource of 123.5 million tonnes grading 0.043% MoS2, 0.062% Cu.	Skeena	B.C. Minfile, 1986; EMR Canada, 1989.	Consists of pyrite, chalcopyrite and molybdenite that occur in Jurassic Hazelton Group fragmental rocks that are intruded by Late Cretaceous stocks.  The largest stock is a hornblende-biotite granodiorite.  Deposit occurs  in veinlets and quartz stockworks in contact metamorphosed fragmental rocks and in sericite-altered porphyry.  Highest  Mo concentrations  accompanied by quartz flooding.  Deposit age interpreted as Eocene. 	Canada

N09-27	Huckleberry	N	09	27	53 40 48N	127 10 18W	53.68	-127.171666666667	5341'N	12710'W	Porphyry Cu-Mo	Cu, Mo	Ag, Au	Medium.  Reserves of 91.2 million tonnes grading 0.52% Cu , 0.014% Mo,  0.064 g/t Au, 3.1g/t Ag.	Bulkley	Southerland Brown, 1969; Carter, 1970; James, 1976; B.C. Minfile, 1988; EMR Canada, 1989;  Mining Review, 1992; Society of Exploration Geologists Newsletter, no. 20, January, 1995, p. 26.	Consists of chalcopyrite and minor molybdenite that occur in fractures dominantly within contact metamorphosed and altered Jurassic Hazelton Group tuffs at contact with an Upper Cretaceous granodiorite porphyry stock of the Burkley Suite.  Magnetite occasionally accompanies chalcopyrite.  Potassic, pyrite and chlorite alteration haloes surround the stock.  Deposit age interpreted as Late Cretaceous. 	Canada

N09-28	Ox Lake	N	09	28	53 40 30N	127 03 18W	53.675	-127.055	5341'N	12703'W	Porphyry Cu-Mo	Cu, Mo	Au, Ag	Medium.  Reserves of 17.2 million tonnes grading 0.33% Cu, 0.06% MoS2.	Bulkley	Sutherland Brown, 1969; Carter, 1970, 1982; Richards, 1976;  EMR Canada, 1989; Dawson and others, 1991.	Consists of pyrite, chalcopyrite, hematite, magnetite, pyrrhotite and molybdenite  that occur as disseminations and as stockworks in Jurassic felsic tuff, andesite tuff, sandstone and siltstone intruded by an Upper Cretaceous granodiorite stock of the Bulkley Suite.  Copper minerals are dominate in the hornfels, and molybdenum minerals are dominant in the porphyry.  Pyrite forms a halo extending beyond deposit.  Porphyry stock has a K-Ar age isotopic date of 83.4  3.2 Ma.  Deposit age interpreted as Upper Cretaceous.	Canada

N09-29	Redbird	N	09	29	53 17 48N	127 00 18W	53.2966666666667	-127.005	5318'N	12700'W	Porphyry Mo	Mo	Cu	Medium.  Reserves of 63.5 million tonnes grading 0.17% MoS2.	Skeena	Carter, 1982; EMR Canada, 1989; Dawson and others, 1991.	Consists of molybdenite and pyrite that occur in a stockwork of quartz veinlets within peripheral concentric alteration zones of a quartz-monzonite porphyry stock of the Eocene Nanika Suite that intrudes Middle Jurassic pyroclastic rocks.  Stock is dominantly one phase, and hosts a peripheral ring of molybdenum.  Potassic (K-feldspar), silica-sericite, and kaolinite alteration are present.  Stock has a K-Ar isotopic age 49.0  2 Ma.  Deposit age interpreted as Eocene.	Canada

N09-30	Burnaby Iron (Jib)	N	09	30	52 24 54N	131 17 42W	52.415	-131.295	5225'N	13118'W	Fe skarn	Fe	Cu	Medium.  Reserves of 7.26 million tonnes grading 60% Fe.	Island Porphyry	B.C. Minfile, 1992; Sutherland Brown, 1968, Anderson and Reichenbach, 1991.	Consists of aconcordant body of magnetite that replaces the contact of Upper Triassic Kunga Group limestone and Upper Triassic Karmutsen, Vancouver Group greenstone.  Both are intruded by Middle to Late Jurassic monzonitic stocks of the Burnaby Island Plutonic Suite.  Stratified rocks strike northeast, dip moderately northwest, and are offset by steeply dipping northwest faults.  Massive magnetite bodies grade into skarns.  Sulfides are erratic and consist mainly of pyrite, with rare chalcopyrite, pyrrhotite and sphalerite.  Deposit age interpreted as Middle Jurassic.	Canada

N09-31	Jedway (Magnet, Jessie)	N	09	31	52 17 36N	131 11 48W	52.2933333333333	-131.196666666667	5218'N	13112'W	Fe skarn	Fe		Medium.  Pre-production reserves of 4.30 million tonnes grading 62% Fe.	Island Porphyry	Sutherland Brown, 1968; Anderson and Reichbach, 1991; B.C. Minfile, 1992.	Consists of replacement bands of magnetite, separated by skarn, that occur mainly basalt, conformable to bedding and also  along faults. Hosted in basalt of the Upper Triassic Karmutsen Formation that is overlain by Upper Triassic Kunga Group limestone and argillite. Volcanic and sedimentary rocks intruded by greenstone, and diorite porphyry to quartz diorite of the Middle to Late Jurassic Jedway stock of the Burnaby Island Plutonic Suite, and by younger rhyolite and basaltic dikes.  Skarns related to the stock.  Operated from 1962-1968. Produced 3,938,682 tonnes of ore.  Deposit age interpreted as Middle Jurassic. 	Canada

N09-32	Alamo	N	09	32	55 45 00N	130 45 00W	55.75	-130.75	5545'N	13045'W	Kuroko massive sulfide(?)	Ag, Au, Cu, Zn		Grab samples and drill core with up to 0.2 to 0.7% Cu, 0.2 g/t Au, 50 g/t Ag, and minor Zn	Tracy	Berg and others, 1977	Disseminated and vein-like(?) masses of chalcopyrite, pyrite, pyrrhotite, and sphalerite in zone up to 25 m wide in Paleozoic(?) paragneiss of the informally named Coast plutonic-metamorphic complex of Brew and Ford (1984) near foliated granodiorite.	Alaska

N09-33	Sea Level	N	09	33	55 22 00N	131 12 00W	55.3666666666667	-131.2	5522'N	13112'W	Au quartz vein	Au, Ag		Unknown amount of gold produced in early 1900's	Juneau	Wright and Wright, 1908	Quartz fissure veins with pyrite, galena, sphalerite and sparse gold in upper Paleozoic or Mesozoic schistose metatuff of the informally named Coast plutonic-metamorphic complex of Brew and Ford (1984).  Local disseminated sulfides in wallrocks.  Sulfide and gold concentrations higher where quartz vein crosscuts altered feldspar porphyry dikes.  Minimum strike length of 600 m.  One 36-m-deep shaft, and 363 m of horizontal workings. 	Alaska

N09-34	Goldstream	N	09	34	55 18 00N	131 39 00W	55.3	-131.65	5518'N	13139'W	Au quartz vein	Au, Cu, Pb, Zn		Produced several thousand tonnes ore	Juneau	Wright and Wright, 1908	Quartz veins contain gold, pyrite, chalcopyrite, galena, sphalerite, and arsenopyrite.  Veins cut greenschist, quartz-sericite schist, and pelitic schist of in Upper Jurassic and Lower Cretaceous Gravina-Nutzotin belt.  Principal vein about 1 to 2.5 m wide.  Several hundred meters of workings. 	Alaska

N09-35	Moth Bay	N	09	35	55 18 00N	131 21 00W	55.3	-131.35	5518'N	13121'W	Kuroko massive sulfide	Cu, Zn		Estimated 91,000 tonnes of 7.5% Zn grading 1% Cu.  Additional 181,000 tonnes of 4.5% Zn, 0.75% Cu	Ketchikan	Robinson and Twenhofel, 1953; Berg and others, 1978; Henry C.  Berg, written commun., 1984	Discontinuous lenses and layers of massive pyrite and pyrrhotite, with minor chalcopyrite and galena.  Associated with disseminated pyrite locally.  Host rocks are light brown-gray, upper Paleozoic or Mesozoic muscovite-quartz-calcite schist, subordinate pelitic schist and quartz-feldspar schist, and possibly metachert.  Layers and lenses of massive sulfides up to 1 m thick parallel compositional layering of schist.  Host rocks part of the informally named Coast plutonic-metamorphic complex of Brew and Ford (1984).  Several open cuts and about 230 m of underground workings.	Alaska

N09-36	Red River	N	09	36	55 04 00N	130 31 00W	55.0666666666667	-130.516666666667	5504'N	13031'W	Kuroko massive sulfide	Cu, Mo		No data	Tracy	Berg and others, 1978	Disseminated grains and small masses of pyrite, pyrrhotite, magnetite, and molybdenite occurring along layering in Paleozoic(?) paragneiss intruded by pegmatite and gneissic granodiorite, of the informally named Coast plutonic-metamorphic complex of Brew and Ford (1984).  Sulfide-bearing layers range from a few centimeters to 30 m thick.  	Alaska

N09-37	Duke Island	N	09	37	54 55 00N	131 21 00W	54.9166666666667	-131.35	5455'N	13121'W	Zoned mafic-ultramafic Cr-PGE	Cr, PGE		Grab samples contain 0.037 g/t Pt and 0.033 g/t Pd	Klukwan-Duke	Clark and Greenwood, 1972; Irvine, 1974; Berg and others, 1981	Disseminated to locally massive titaniferous magnetite and sparse chromite in hornblende-clinopyroxene phase of Cretaceous zoned ultramafic pluton.  Ultramafic pluton intrudes early Paleozoic felsic metavolcanic rocks, early Paleozoic diorite, and Triassic gabbro of Alexander terrane.	Alaska

N10-01	Lorraine (Duckling Creek)	N	10	01	55 55 36N	125 26 12W	55.9266666666667	-125.436666666667	5556'N	12526'W	Porphyry Cu-Mo	Cu	Au, Mo	Medium.  Resource of 9.1 million tonnes grading 0.70% Cu, 0.27 g/t Au.	Copper Mountain (North)	Wilkinson and others, 1976; Garnett, 1978; B.C. Minfile, 1985; Dawson and others, 1991; EMR Canada, 1989.	Consists of two fault-bounded zones of chalcopyrite, bornite and magnetite that occur as disseminations in a syenite migmatite of the Copper Mountain Suite that intrudes monzonite and diorite of the Hogem batholith.  K-Ar isotopic age of 175  5  Ma for syenite intrusion and associated deposit.  Sulfides are dominantly disseminated, but also occur in veins. In a Lower Zone, sulfides occur in mafic-rich lenses and are zoned from chalcopyrite + pyrite at the rim, through chalcopyrite with minor bornite to bornite with minor chalcopyrite at the core.  Magnetite is common in veinlets and as an accessory mineral.  An Upper Zone is similar but is highly oxidized.  Copper deposition associated with high biotite and chlorite content, potassium feldspar and sericite alteration.  Deposit age interpreted as Middle Jurassic.	Canada

N10-02	Mount Milligan	N	10	02	55 07 30N	124 01 42W	55.125	-124.028333333333	5508'N	12402'W	Porphyry Cu-Au	Cu, Au		Medium.  Reserves of 298.4 million tonnes grading 0.22% Cu, 0.45 g/t Au.	Copper Mountain (North)	EMR Canada, 1989; Delong and others, 1991; McMillan, 1991; Gosh, 1992; Nelson and others, 1991; Barrie, 1993, E & M J , April 1992.	Consists of pyrite, chalcopyrite, bornite and magnetite that occur as disseminations and in quartz veinlets. Hosted in augite porphyritic andesite of the Witch Lake Formation of the Upper Triassic to Lower Jurassic Nicola Assemblage that is intruded by several small brecciated diorite and monzonite porphyry dikes and stocks.  Deposit related to the intrusion of the MBX and Southern Star stocks.  A U-Pb zircon age of 183  1 Ma is obtained for the Southern Star monzonite.  Cu and Au minerals associated with moderate to intense potassic alteration around intrusive contacts.  Propylitic alteration is widespread and peripheral to potassic alteration.  Deposit age interpreted as Middle Jurassic.	Canada

N10-03	Pinchi Lake	N	10	03	54 37 54N	124 26 00W	54.6316666666667	-124.433333333333	5438'N	12426'W	Silica-carbonate Hg 	Hg		Medium.  Reserves of 1.1 million tonnes grading 0.32% Hg.	Pinchi Lake	Armstrong, 1949; Paterson, 1977; B.C. Minfile, 1989; EMR Canada, 1989; Dawson and others, 1991.	Consists of cinnabar that occurs in a stockwork of thin quartz veins, replacement, lodes and breccia fillings. Hosted in marine limestone and carbonatized ultramafic rocks that occur in shears along the Pinchi Fault.  Fault separates the Mississippian to Triassic Cache Creek Terrane from the Upper Triassic rocks of Quesnellia and is interpreted as providing a zone of permeability for mercury-bearing hydrothermal solutions. Ultramafic rocks, chert, argillite and greenstone are part of Cache Creek ophiolite and are intensely altered along the fault zones to an assemblage of Fe-Mg carbonates, quartz, mariposite and talc.  Mineralization postdated both the Upper Triassic blueschists and Upper Cretaceous-Early Tertiary conglomerates. Production of 6000 tonnes of Hg between 1942 to 1975.  Deposit age interpreted as Eocene-Oligocene(?). 	Canada

N10-04	Endako	N	10	04	54 02 12N	125 06 30W	54.0366666666667	-125.108333333333	5402'N	12507'W	Porphyry Mo	Mo		Large.  Reserves of 280.0 million tonnes grading 0.08% Mo.	Francois Lake	B.C. Minfile, 1989; Dawson and others, 1991; Kimura and others, 1976; Dawson and Kimura, 1972; White and others, 1970.	Consists of molybdenite, pyrite and magnetite that occur in an elongate stockwork of quartz-sulfide veins that occur along a northwest-trending axis. Deposit hosted in quartz monzonite of the Late Jurassic Francois Lake Suite and occurs mainly along a series of en echelon east-striking veins, at or near the intersection of regional northwest and east structures.  Alteration includes pervasive kaolinite and  vein envelopes of potassium feldspar and sericite.  Intrusive has a K-Ar isotopic age of 141 Ma.  Deposit age interpreted as Late Jurassic-Early Cretaceous. 	Canada

N10-05	Capoose Lake	N	10	05	53 17 00N	125 09 30W	53.2833333333333	-125.158333333333	5317'N	12510'W	Ag-Au polymetallic vein	Ag	Pb, Zn, Cu, Au	Large.  Reserves of 28.3 million tonnes grading 36 g/t Ag, 0.91 g/t Au.	Skeena	Church and  Diakow, 1982; EMR Canada, 1989; Mining Review, 1992.	Consists of high Au and Ag concentrations associated with galena, pyrite, pyrrhotite, chalcopyrite, arsenopyrite and sphalerite that occur as disseminations, replacement of garnet, and fracture filling in Jurassic volcanic rocks of the Hazelton Group in structurally controlled zones. Volcanic rocks associated with subvolcanic porphyritic pluton of the Eocene Quanchus Suite.  Deposit age interpreted as Eocene. 	Canada

N10-06	Cariboo-Barkerville District (Aurum, Mosquito Creek, Island Mountain)	N	10	06	53 05 24N	121 33 36W	53.09	-121.56	5305'N	12134'W	Au quartz vein	Au	Ag	Medium.  Production (1933-1987) of 38-05 t Au, 5.1 t Ag, Reserves of 401,768 tonnes grading 5.08 g/t Au.  Average grade of 5.08 g/t Au.	Cariboo	Andrew and others, 1983; B.C. Minfile, 1989; Robert and Taylor, 1989; Schroeter and Lane, 1991.	District contains three principal mines (Cariboo Gold Quartz, Mosquito Creek, and Island Mountain Mines) that consists of quartz-sulfide veins and pyritic replacement lenses. Quartz-sulfide veins occur in phyllite and quartzite of the "Rainbow Member" usually within 100 meters of the local contact with mafic volcanic rocks and minor limestones of the "Baker Member" of the Lower Cambrian Downey Creek Formation of the Cariboo terrane. Pyrite lenses occur discontinuously in marble bands within the "Baker Member".  Two sets of quartz-sulfide-Au veins are associated with major north-trending faults.  Veins intrude  the pyrite-Au lenses that appear to predate deformation and are interpreted to be syn-metamorphic.  Producted 2.7 million tonnes ore (1933-1987),  with average grade of 13.94 g/t Au, 1.87 g/t Ag.  Deposit age interpreted as Middle Jurassic and Early Cretaceous. 	Canada

N10-07	Gibraltar (Pollyanna, Granite Mt)	N	10	07	52 30 54N	122 15 36W	52.515	-122.26	5231'N	12216'W	Porphyry Cu-Mo	Cu, Mo	Ag, Au	Large.  Production and reserves of 413 million tonnes grading 0.35% Cu, 0.016% MoS2, 0.006 g/t Au.	Guichon	Drummond, and others, 1976; B.C. Minfile, 1990; McMillan, 1991; Dawson and others, 1991, Gibraltar Mines Ltd., news release, March 21, 1994.	Consists of chalcopyrite, chalcocite, molybdenite, cuprite and bornite with minor magnetite and pyrite that occur as stockworks and fracture-filling veins. Deposit hosted in the metamorphosed  and deformed Granite Mountain quartz diorite pluton of the Guichon Suite.  Pluton intrudes volcanic and sedimentary rocks of the Cache Creek terrane.  K-Ar age of 204 Ma  6 Ma (Early Jurassic) for pluton age.  Multiple intrusions, deformation, greenschist facies metamorphism and mineralization are interpreted to have occurred contemporaneously with amalgamation of Cache Creek terrane with Quesnellia and Stikinia to the east and west respectively.  Current reserves of 54 million tonnes grading 0.38% Cu.  Deposit age interpreted as Early Jurassic.	Canada

N10-08	Mt. Polley (Cariboo-Bell)	N	10	08	52 33 48N	121 38 12W	52.5633333333333	-121.636666666667	5234'N	12138'W	Porphyry Cu-Au	Cu, Au		Medium.  Reserves of 48 million tonnes grading 0.38% Cu, 0.55 g/t Au.	Copper Mountain (South)	EMR Canada, 1989; B.C. Minfile, 1991; McMillan, 1991; Mining Review, 1991; Gosh, 1992; Fraser and others, 1993.	Consists of magnetite, chalcopyrite and minor pyrite that occur in several intrusive phases and three distinct breccias in an Early Jurassic pseudoleucite-bearing alkaline complex that intrudes Upper Triassic Nicola alkaline volcanic and volcaniclastic rocks of the Quesnel Trough.  Some skarn and vein occurs in Nicola Group tuffite and flows.  Supergene mineralization includes malachite, native copper, cuprite, chalcocite and covellite.  U-Pb zircon age of (200  1.5 Ma) for diorite and of monzonite porphyry.  Deposit age interpreted as Early Jurassic. 	Canada

N10-09	Eaglet (Quesnel Lake)	N	10	09	52 34 06N	120 58 54W	52.5683333333333	-120.981666666667	5234'N	12059'W	F vein	F	Ag, Zn, Pb, Mo, W	Medium.  Reserves of 21.8 million tonnes grading 11.5% CaF2 (w/ up to 514 g/t Ag).	Unassigned	Ball and Boggaram, 1985; B.C. Minfile, 1989; EMR Canada, 1989; Dawson and others, 1991.	Consists of fluorite in feldspar-mica gneiss of Kootenay terrane that is intruded by masses of pegmatite, aplite and granitic rock.  Fluorite occurs as disseminated grains, as thin films on fractures, as veinlets and scattered veins up to 15 cm thick, and as pods and irregular masses 15 to 20 cm wide.  North to northwest-trending mineralized zones dip steeply.  Other ore minerals are galena, sphalerite, molybdenite, celestite, pyrite and silver. Deposit contains chlorite, sericite, and potassic alteration.  Deposit age interpreted as Early Cretaceous.	Canada

N10-10	Frasergold (Eureka Peak, Kay, Mac)	N	10	10	52 18 18N	120 34 36W	52.305	-120.576666666667	5218'N	12035'W	Au quartz vein	Au	Ag, Cu, Zn, Pb	Medium.  Resource of 12.7 million tonnes grading 1.85 g/t Au.	Cariboo	Bloodgood, 1987; B.C. Minfile, 1989; Eureka Resources Inc., annual report,1990; Mining Review, 1992.	Consists of disseminated pyrrhotite and pyrite (5% to 10%) with trace sphalerite, chalcopyrite, galena and coarse-grained gold that occur in deformed quartz-carbonate veins and stockwork. Occurs as stratabound bodies in porphyroblastic phyllite (locally referred to as "knotted phyllite") of the Upper Triassic Quesnel River Group.  Veins are interpreted as forming early in the structural history of the area and  generated  by metamorphic segregation during the accretion of Quesnellia terrane to ancestral North America.  The Frasergold Main Zone has been traced by drilling over a strike length of 8 km with gold deposits occurring in at least three stratigraphic horizons within the phyllite.  Reserves of 12.7 million tonnes are based on a mining depth of 100 meters.  Mineable reserves estimated as 3.17 million tonnes grading 1.71 g/t.  Deposit age interpreted as Middle Jurassic. 	Canada

N10-11	Boss Mountain	N	10	11	52 05 42N	120 54 24W	52.095	-120.906666666667	5206'N	12054'W	Porphyry Mo	Mo		Medium.  Reserves of 3.84 million tonnes grading 0.135% Mo.	Bayonne	EMR Canada, 1989; Soregaroli and Nelson, 1976.	Consists of molybdenite that occurs in quartz veins, fracture zones and in collapse breccias hosted by the granodiorite phases of the composite Early Jurassic Takomkane batholith that is associated with the mid-Cretaceous Boss Mountain stock.  Emplacement of the stock was accompanied by rhyolite dikes, brecciation and multiple stages of veining and Mo deposition.  Pyrite forms a 1.5 km-wide halo.  Alteration assemblages consists of garnet, hornblende, biotite, sericite, potassium feldspar, chlorite and talc. Produced 2.2 million tonnes grading 0.7% MoS2 between 1965 and 1982.  Deposit age interpreted as mid-Cretaceous.	Canada

N11-01	Forgetmenot Pass	N	11	01	53 45 00N	119 53 18W	53.75	-119.888333333333	5345'N	11953'W	Stratbound gypsum	Gypsum	magnesite	Medium.  Reserves of 2.3 million tonnes grading 75% to 90% gypsum.	Southern Rocky Mountain	EMR Canada, 1989; B.C. Minfile, 1991; Butrenchuk, 1991.	Consists of four concordant beds of gypsum that are hosted in Upper Triassic dolomite of the lowermost Whitehorse Formation.  Beds range from 2 to 26 meters thick, occur over a 100-meter stratigraphic interval, strike northwestward, and dip from 25 to 30 southwest.  Solution breccia is locally present.  Potential resource of 25 to 30 million tonnes at grades similar to reserves.  Deposit age interpreted as Upper Triassic. 	Canada

N51-01	Bamskoe (Chul'bango)	N	51	01	55 59 00N	123 54 00E	55.9833333333333	123.9	5559'N	12354'E	Au-Ag epithermal vein	Au, Ag		Medium.  Average grade of  8.4 g/t Au and  25 g/t Ag	Stanovoy	A.V. Lozhnikov and others, written commun., 1989; Kurnik, 1992.	Consists of thirty-five zones of listwanite-beresite hydrothermal alteration that occur in granite and gneiss.  Altered zones contain eight Au-bearing prospects with abundant veins, pods, and small quartz and quartz-carbonate veinlets. Prospects range from 140 to 960 m long and have an average thickness of about 3 m. Deposit associated with Early Cretaceous(?) subvolcanic rhyolite and rhyodacite stock, and occurs around the periphery of stock that intrudes Late Proterozoic granite and biotite-amphibolite gneiss of the Stanovoi terrane.	Russia

N51-02	Berezitovoe	N	51	02	54 19 00N	122 35 00E	54.3166666666667	122.583333333333	5419'N	12235'E	Polymetallic sufide and Au vein	Zn, Pb, Au, Ag		Medium.  Average grade of 3.3 g/t Au, 14.3 g/t Ag, 0.93% Zn , 0.57% Pb. Contains an estimated 42.3 tonnes Au, 201.0 tonnes Ag, 131.0 thousand tonnes Zn, 80 thousand tonnes Pb.  	Unassigned	A.K. Ivashchenko and A.A. Kuzin, written commun., 1982;  Vakh, 1989.	Massive Pb-Zn sulfides occur in a lenticular, northwest-striking, steeply-dipping (75-85) zone that ranges up to 1000 m long and from 100 to 160 m thick.  Polymetallic sulfide deposit hosted in Early Proterozoic gneissic granite. Sulfides metamorphosed; galena-sphalerite aggregates contains later andradite garnet and gahnite (zinc spinel).  Host muscovite-quartz-potassium feldspar rock also contains metamorphic garnet.  Adjacent Mesozoic igneous rocks not metamorphosed, indicating pre-Mesozoic mineralization. Au deposit occurs in narrow northeast-trending fracture zones.  Au mineralization is later than polymetallic sulfide mineralization. Thin Au-bearing zones, associated with quartz-sericite altered rock,  occur beyond the polymetallic sulfide deposit in gneissic granite. 	Russia

N51-03	Kirovskoe	N	51	03	54 27 00N	124 14 00E	54.45	124.233333333333	5427'N	12414'E	Granitoid-related Au	Au		Small.  Mined until 1961.  About 10 tonnes gold produced.  	Stanovoy	Gurov, 1969;  G.P. Kovtonyuk, written commun., 1990.	Consists of northwest-striking gold-quartz-sulfide veins hosted in an Early Cretaceous granodiorite stock.  Veins commonly occur along contacts of diabase porphyry dikes that cut the granodiorite.  Contacts of veins are generally sharp, although host rock is hydrothermally altered.  Veins range from 0.5 to 1.0 m thick, and the surrounding altered rock ranges from 5.0 to 9.0 m thick. Altered rocks consist mainly of quartz, albite, sericite, and hydromica; the veins consists predominantly of 40 to 95% quartz.  Main sulfides are pyrrhotite, arsenopyrite, and chalcopyrite, with less abundant galena, sphalerite, bismuthite, and tennantite-tetrahedrite.  Gold ranges up to 0.28 mm diameter.  Fineness of 844 to 977.  Deposit source for the placer deposits of the Dzhalinda, Yannan, and Ingagli Rivers, the largest in the Russian Far East.  	Russia

N51-04	Burindinskoe	N	51	04	53 41 00N	124 54 00E	53.6833333333333	124.9	5341'N	12454'E	Au-Ag epithermal vein	Au, Ag		Small.  Average grade of 9.5 g/t Au, 42.6 g/t Ag.  Reserves of about 827,400 tonnes. Inferred reserves of 6,230 kg gold and 38,200 kg silver.	Stanovoy	V.A. Taranenko, written commun., 1991; G.P. Kovtonyuk, written commun., 1993.	Occurs in steeply-dipping quartz and quartz-carbonate gold-bearing veins.  Veins range up to 200 m length, with an average thickness of about 10 m. Hosted in an Early Cretaceous volcanic sequence overlying the Gonzhinsky terrane of the Burea-Khanka superterrane.  	Russia

N52-01	Zolotaya Gora	N	52	01	54 19 00N	126 44 00E	54.3166666666667	126.733333333333	5419'N	12644'E	Au quartz vein	Au		Small. Average grade of grade 52 g/t Au. Intermittently mined from 1917 to 1948.  2.5 tonnes gold produced.	Stanovoy	Mel'nikov, 1984	Consists of quartz veins and zones of hydrothermally altered metamorphic rocks that occur conformably to host rock layering.  Alteration is predominantly sericite-quartz and chlorite-amphibole-quartz.  Main mineral assemblage is sulfides-biotite-quartz, sulfide-sericite-quartz and biotite-quartz-amphibole-chlorite. Less common are amphibole-quartz-feldspar mineral assemblages.  Four successive stages of mineralization are identified:  (1) magnetite-chalcopyrite-pyrrhotite-quartz; (2) gold-carbonate-sulfide; (3) zeolite; and (4) supergene.  Gold occurs both in early and late quartz, and in hydrothermally-altered rocks.  Gold generally forms films and fine plates in fractures. Gold concentrated in selvages of quartz and quartz-pyrite veins.  Gold fineness  high ((985). Deposit hosted in gneissic granite, granulite, calcareous shale, and quartzite of Stanovoi block of North Asian Craton. 	Russia

N52-02	Pioneer	N	52	02	53 27 00N	126 27 00E	53.45	126.45	5327'N	12627'E	Granitoid-related Au	Au		Small.  Average grade of 2.7 g/t Au, and 5.2 g/t Ag. Reserves of 17.1 tonnes Au, 20.1 tonnes Ag. 	North Bureya	N.E. Malyamin and V.E. Bochkareva, written commun., 1990; V.N. Akatkin, written commun., 1991.	Consists of quartz, quartz-feldspar, quartz-tourmaline, and quartz-carbonate veins, and zones of altered quartz-potassium feldspar-sericite-albite rocks. Zones are 1 to 50 m thick, and in plan commonly branch and change trends. Ore zones are large, have low Au content and no visible boundries. Extent of deposit determined by geochemical sampling. Gold and gold-sulfide ore assemblages are distinguished. Gold assemblage consists of quartz-adularia-carbonate veins; gold-sulfide assemblage consists of quartz veins with pyrite, galena, stibnite, and silver sulfosalts. Deposit hosted along margin of an Early Cretaceous granodiorite intrusion; both within the intrusion, and in adjacent contact metamorphosed Jurassic sandstone and siltstone. 	Russia

N52-03	Pokrovskoe	N	52	03	53 08 00N	126 17 00E	53.1333333333333	126.283333333333	5308'N	12617'E	Au-Ag epithermal vein	Au, Ag		Medium.  Average grade 4.4 g/t Au and 15 g/t Ag. Reserves of 15 million tonnes. 	North Bureya	Khomich and others, 1978; Mel'nikov, 1984; V.D. Mel'nikov, written commun., 1993; Khomich, 1990.	Consists of gently-dipping quartz veins and zones of hydrothermal alteration. Main alteration types are propilitic (albite, sericite, calcite, chlorite, and pyrite), berezite (quartz, sericite, and hydromica), and argillic (kaolinite, montmorillonite, hydromica, carbonates, quartz, and pyrite). Largest ore bodies consist of gently-dipping zones of altered rock located near the lower contact of andesitic sequence with a granodiorite porphyry sill. Hydrothermally altered rocks composed of quartz (25-85%), carbonate (2-5%), hydromica (5-12%), adularia (up to 5%), kaolinite (5-7%), and sulfides (less than 1%, mostly pyrite). Gold is fine-grained (0.0005 to 0.032 mm) and associated mainly with quartz rather than with sulfides. Silver grains (0.002 to 0.016 mm) occur in Fe hydroxide. Deposit hosted in Late Cretaceous andesite, dacitic, and tuff. that overlies a Jurassic coal-bearing sequence of sandstone, siltstone, and argillite. Deposit interpreted as forming in Late Cretaceous.  	Russia

N52-04	Malomyr	N	52	04	53 06 00N	131 50 00E	53.1	131.833333333333	5306'N	13150'E	Au quartz vein	Au		Medium.   Average grade of 5.0 to 12.4 g/t Au.  Estimated reserves of 30-50 tonnes gold.	Selemdzha-Kerbi	K.F. Klyzhko and V.P. Levshuk, written commun., 1982;  S.G. Parada, written commun., 1984; B.D. Melnikov, written commun., 1993.	Consists of quartz veins and local stockworks, with an area of 12 km2.  Most (94%) of gold reserves occur in the gently-dipping Diagonalnaya zone that is about 3 km along strike and ranges from 30 to 150 m thick.  Diagonalnaya zone has average grade of 1-2 g/t Au and consists of ten gently-dipping (20 to 30) ore bodies ranging from1.0 to 28 m thick and 50 to 400 m long with an average grade of 5 to 12.4 g/t Au. Assemblages in deposit formed during five successive stages:  (1) quartz breccia with abundant disseminated pyrite; (2) quartz-sulfide veinlets; (3) veinlets of chalcedony-like quartz; (4) monomineral pyrite veinlets; and (5) quartz-carbonate veinlets with pyrite. The second and third stages separated by the intrusion of dikes of Early Cretaceous granodiorite porphyry and diorite porphyry.  Only pre-dike mineral assemblages contain gold.  Dikes occur within ore zones and are controlled by the same fractures as ore bodies.  Gold is fine-grained and ranges up to 0.02 mm. Shape of gold grains is predominatly lumpy, less commonly platy.  Gold fineness ranges of 700 to 820.  Typical admixtures are Fe, Ti, Cu, and Hg. Deposit hosted in Early Paleozoic quartz-micaceous rocks, shale, slate, and metasandstone of the Tukuringra-Dzhagdi terrane.  	Russia

N52-05	Kamenushinskoe	N	52	05	52 43 00N	129 07 00E	52.7166666666667	129.116666666667	5243'N	12907'E	Cu massive sulfide 	Cu, FeS		Small	Gar	P.N. Radchevsky, written commun., 1956 , V.V. Ratkin, this study.	Consists of lenses, from 100 to 800 m long and 2 to 12 m thick, that occur conformable to bedding. Eleven ore bodies prospected to depths of 300 m. Pyrite is the most common ore mineral; however, some ore bodies consist of hematite-magnetite-pyrite ore. Chalcopyrite locally comprises up 1 to 2%. Deposit locally contact metasomatized into skarn during the intrusion of Paleozoic granite. Deposit is interpreted as of sedimentary-exhalative origin that was associated with felsic seafloor volcanism. Deposit hosted in Cambrian rhyolite of the Mamyn terrane. The rhyolite underlies a basaltic and limestone sequence that contains volcanogenic Fe (magnetite) Gar deposit.	Russia

N52-06	Gar	N	52	06	52 34 00N	129 04 00E	52.5666666666667	129.066666666667	5234'N	12904'E	Volcanogenic Fe	Fe		Large.  Average grade of 41.7% Fe.  Estimated reserves of 389.1 million tonnes. Not mined	Gar	Zimin, 1985; Zimin and Konoplev, 1989.	Consists of sheeted Fe layers, mainly magnetite, that occur in metamorphosed Early Cambrian(?) felsic and mafic volcanic and associated rocks with limestone lenses, all part of the Gar terrane. The Fe layers occur chiefly in the upper Early Cambrian(?) section, composed mainly of mafic volcanic rocks, within a section that is about 220 to 250 m thick. Most of the ore, about 75 percent, occurs within an interval ranging from 156 to 184 m thick. The deposit occurs for 4 km along strike. Deposit intruded by Early Paleozoic gabbro, diabase, and plagiogranite and is locally metamorphosed to skarn. Similar volcanogenic Fe deposis occur to the north and need further exploration.	Russia

N52-07	Chagoyan	N	52	07	52 19 00N	128 22 00E	52.3166666666667	128.366666666667	5219'N	12822'E	Stratiform Pb-Zn	Pb, Zn, Ag		Small. Average grade of 1.42% Pb, 5.16% Zn, and up to 3,000 g/t Ag. Estimated reserves of 65 thousand tonnes zinc.	Gar	I.G. Khel'vas, written commun., 1963;  V.V. Ratkin, this study.	Consists of a galena-sphalerite aggregate that occurs as cement between grains in sandstone, although veinlets are also common. Deposit isabout 270 m long and 1.0 m thick. Hosted in quartz-feldspar sandstone that underlies Cambrian(?) limestone and dolomite of Mamyn terrane. Galena and sphalerite are the dominant ore minerals, with subordinate pyrite, pyrrhotite, and chalcopyrite. Post-ore dikes and stocks of Early Cretaceous diorite and granodiorite cut ore bodies. The Mesozoic igneous rocks the stratiform ore bodies locally exhibit hydrothermal alteration to quartz, sericite, and tourmaline. Deposit occurs on the northern bank of the Zeya River.  	Russia

N53-01	Bogidenskoe	N	53	01	55 37 58N	133 41 39E	55.6327777777778	133.694166666667	5538'N	13342'E	Anorthosite apatite Ti-P	Ti, P		Large. Average grade of 3-15% apatite averaging 5.7% P2O5.  Contains an estimated 34.3 million tons P2O5. Extends to depth of 400 m.	Dzhugdzhur	Lennikov, 1968, 1979; Panskikh and Gavrilov, 1984; Neimark and others, 1992.	Consists of densely disseminated and massive lenticular and sheeted bodies that occur in distinctly stratified rhythmic bands in olivine gabbro, gabbro-syenite, syenite, anorthosite, gabbro-norite, and pyroxene.  The sheeted ore bodies extend for over 10 km along strike.  Ore minerals are alternating massive, spotted, and disseminated apatite-ilmenite-titanium-magnetite.  Apatite contains up to 2.4% F. Ti magnetite contains up to 21% TiO2 and from 0.3 to 1.1 % V2O5; Ilmenite contains up to 3.1% Fe2O3.  U-Pb isotopoic age determination on the igneous host rocks of 1,700 Ma . Deposit occurs in the upper basins of the Bogide and Soroga Rivers. 	Russia

N53-02	Gayumskoe	N	53	02	55 42 58N	134 14 51E	55.7161111111111	134.2475	5543'N	13415'E	Anorthosite apatite Ti-P  	Ti, P		Large. Average grade of 8.7% P205.  Locally contains up to 31.6% P205. Estimated 40 million tonnes P2O5.   	Dzhugdzhur	Lennikov, 1968, 1979; Panskikh and Gavrilov, 1984; Neimark and others, 1992.	Consists of a series of closely-spaced, veined and stock-like bodies (nelsonites) of apatite, ilmenite, titanomagnetite hosted in anorthosite that is associated with lenticular and irregular bodies of olivine gabbro, gabbro-pyroxenite, pyroxenite, and dunite.  Apatite is a hydroxyl-fluorine-bearing variety, containing up to 2.75% H2O. Titanomagnetite contains from 3.8 to 21% TiO2. Ilmenite is fairly oxidized and contains up to 2.5% Fe2O3.   U-Pb isotopic age determination on the igneous host rocks of 1,700 Ma. Deposit occurs in the upper reaches of the Gayum River.	Russia

N53-03	Maimakanskoe	N	53	03	55 37 11N	134 29 42E	55.6197222222222	134.495	5537'N	13430'E	Anorthosite apatite Ti-P	Ti, P		Large.  Contains an estimated 63 million tons P2O5 extending to 400 m depth.   	Dzhugdzhur	Lennikov, 1968, 1979; Panskikh and Gavrilov, 1984; Neimark and others, 1992.	Consists of sparsely to densely disseminated, sheeted and lenticular, apatite-ilmenite-titanium magnetite ore bodies in olivine gabbro, gabbro-norite, gabbro-pyroxenite, and pyroxenite. Ore minerals are massive apatite, apatite-ilmenite, ilmenite, and apatite-ilmenite-titanium magnetite in steeply dipping (50-60) veins (nelsonite) that are hosted in coarse-grained anorthosite.  Apatite-ilmenite-titanium magnetite ore is predominate and comprised up to 80% of the deposit.  Apatite contains fluorine. Titanium magnetite averages 13.6% TiO2 and 0.37% V2O5.  Ilmenite contains 6 to 7% Fe2O3.  Apatite content up to 50-60% in massive and spotted apatite ore, but averages 15-20%.  U-Pb isotoic age determination on the igneous host rocks of 1,700 Ma. Deposit occurs in the upper reaches of the Maimakan River near Kendeke Spring, over an area of approximately 30 km2. 	Russia

N53-04	Dzhaninskoe	N	53	04	55 30 43N	134 08 56E	55.5119444444444	134.148888888889	5531'N	13409'E	Anorthosite apatite Ti-P	Ti, P		Large. Low grade of up to 4% P205 .  Contain an estimated 78 million tons P2O5 to a depth of 400 m.   	Dzhugdzhur	Lennikov, 1968, 1979; Panskikh and Gavrilov, 1984; Neimark and others, 1992.	Consists of sparsely disseminated apatite, ilmenite, and titanium magnetite in olivine melanocratic gabbro, gabbro-pyroxenite, and pyroxenite that form stock-like bodies in anorthosite.  Apatite contains up to 1.14% F;. Titanium magnetite is moderately titanium-bearing with up to 10.7% TiO2 and with 0.28 % V205 .  Ilmenite contains 7.8% Fe2O3.  U-Pb isotopic age determination on the igneous host rocks of 1,700 Ma. Deposit occurs on the right bank of the Dzhana River near the mouth of the Kurung River.  	Russia

N53-05	North-Shantarskoe	N	53	05	55 09 15N	137 35 06E	55.1541666666667	137.585	5509'N	13735'E	Sedimentary phosphorite   	P		Small.  Average grade of less than 6-8% P2O5.  	Galam	Shkolnik, 1973.	Consists of phosphorite deposits that occur in a sedimentary breccia with indistinct borders.  Deposit is as much as 15-16 m thick.  Deposit hosted in carbonate rocks in a sequence of chert and volcanic rocks that are partially altered to quartz-carbonate rock. Sequence occurs for approximately 8-10 km at the northeast end of Bolshoi Shantar Island.  	Russia

N53-06	Nelkanskoe	N	53	06	54 18 26N	134 59 22E	54.3072222222222	134.989444444444	5418'N	13459'E	Sedimentary phosphorite   	P		Small.  Ranges from 4 to 30% P2O5 , averages 7-11%.  	Galam	Shkolnik, 1973.	Consists of phosphorite sedimentary breccia that occur in a steeply-dipping sequence of jasper and volcanic rocks that are exposed in an erosional windows below gently-dipping Jurassic sedimentary rocks.  Hosted in silicified dolomite and limestone. Phosphorite cannot be traced beyond altered carbonate rocks.  Phosphorite beds range up to 1.8 km in length, although some are only several tens of meters long. Thickness varies from 2 to 41.4 m.  Deposit drilled to almost 300 m. In addition to fragments of primary phosphorite, deposit contains fragments of silicified carbonate rocks that are generally 0.5 to 2 cm in diameter, and are cemented by phosphate and hydromica. Phosphates are radioactive.  	Russia

N53-07	Ir-Nimiiskoe-2	N	53	07	54 08 08N	134 37 30E	54.1355555555556	134.625	5408'N	13438'E	Sedimentary phosphorite	P		Medium.  Phosphorus anhydrite ranges from 3 to 12%, averages 7-8%.  	Galam	S.G. Kostan'yuan and others, written commun., 1973.	Consists of numerous deposits of unusual phosphorites, that occur in sedimentary breccia formed at atoll fans and seamounts. Deposits occur in an area 25-30 km long and 6-8 km wide and are hosted in complex, steeply-dipping and folded rocks that represent a reef edifice.  Some of the carbonate is silicified.  Boundaries of deposits are gradational due to the variable amount of fragments of primary phosphorite in host dominant limestone, dolomite, and cherty carbonate, and in rare jasper, volcanic, and cherty claystone fragments. Primary phosphorites seldom occur in situ, but occur in thin beds and small lenses of coquina formed predominantly of inarticulate brachiopods with phosphate shells and some Cambrian trilobites. Phosphorite breccia occurs at different stratigraphic levels and has no clear boundaries; margin determined by sampling.  Approximately 30 phosphorite layers are identified. Layers range from several tens of m to several km long, but are commonly discontinuous. Deposit generally has simple mineral composition; in addition to phosphorite contain quartz, dolomite, calcite, rare  pyrite, chert, and volcanic rock fragments.  Thickness of the phosphorite ranges from 0.5 to 24 m, but varies greatly even over short distances. 	Russia

N53-08	Ir-Nimiiskoe-1	N	53	08	54 08 31N	134 36 14E	54.1419444444444	134.603888888889	5409'N	13436'E	Volcanogenic Mn   	Mn		Small.  Average grade of 22.4% Mn.  	Galam	Shkolnik, 1973.	Consists of partly metamorphosed, steeply-dipping, lenticular and sheeted, bedded Mn bodies that occur in a diverse Lower Cambrian sequence of jasper, shale, schist, spilite, basalt, and basaltic tuff that overlays a carbonate reef complex with seamounts.  Mn bodies are several tens to several hundred m long, with a thickness of 1.5 to 120 m. Bodies vary from massive and banded to thinly-banded.  Mn bodies consist of oxidized braunite to hausmannite-rhodochrosite and rhodochrosite, and rhodonite-rhodochrosite.  Bodies also contain quartz and minor amounts of magnetite, hematite, manganite, sulfides, piedmontite, manganophyllite, tordite, viridine, amphiboles, muscovite, and plagioclase.  Mn content varies greatly, reaching 50-56% in oxidized ore and 47% in carbonate ore.  P ranges from 0.01 to 0.12%, Fe up to 3%, and SiO2 9 to 70%. 	Russia

N53-09	Milkanskoe	N	53	09	54 03 33N	134 08 14E	54.0591666666667	134.137222222222	5404'N	13408'E	Volcanogenic Fe   	Fe		Large.  Average grade of 30.9% total Fe, 29.1% soluble Fe, 2.1% Mn, 0.27% P, 0.01% S.	Galam	Shkolnik, 1973.	Consists of several deposits in a district of 100 km2. Deposits consists of numerous lenticular and sheeted magnetite bodies that consist of conformable, steeply-dipping bodies of complex composition. Magnetite bodies occur in a layer up to 600 m thick that consists of alternating, weakly metamorphosed Cambrian jasper, schist, shale, spilite, basalt, and basaltic tuff that is interlayered with rare sandstone, siltstone, limestone, and dolomite.  Largest deposit consists of a sheeted body over 6 km long and a variable thickness of 100 to 330 m that is ntercalated with jasper and poorly mineralized schist and shale. About 2/3 of sequence is potentially economic.  Individual deposits range up to 40-50 m in thickness; maximum thickness of interlayered barren rock is 25 m.  Deposit explored for 530 m downdip and exhibits constant thickness.  Geophysical data indicates the deposit may extend about one km downdip.  Seven smaller deposits extend 600 to 800 m along strike and contain mainly magnetite and local magnetite and hematite that is  often intercalated with spherolitic siderite.  Smaller deposits are finely-bedded, banded, rarely massive, have variable mineral compositions, and contain relatively abundant Fe chlorite, hydromica, stilpnomelane, muscovite, sericite, and apatite, and rare pyrite, covellite, and chalcocite. 	Russia

N53-10	Lagapskoe	N	53	10	53 53 53N	134 15 47E	53.8980555555556	134.263055555556	5354'N	13416'E	Sedimentary phosphorite   	P		Medium.  Contains from 4 to 30% anhydrous phosphorous, averages 5-7%.	Galam	Zagorodnykh, 1984.	Consists of carbonate beds that contain phosphorite-bearing breccia with Cambrian fossils.  Beds are locally up to 30 m thick, but generally range from several tens of cm to 20 m.  Phosphorite-bearing breccia contains fragments of primary phosphorite, dolomite, limestone, and rare jasper, schist, and shale.  Carbonate is commonly completely altered to quartz. Carbonate bed intercalated with jasper, shale, schist, siltstone, spilite, basalt, and basaltic tuff.  	Russia

N53-11	Galamskoe	N	53	11	53 36 47N	133 55 54E	53.6130555555556	133.931666666667	5337'N	13356'E	Volcanogenic Fe   	Fe	Mn, P2O5, S	Large.  Average grade of 42.4% total Fe; 39.8% soluble Fe; 1.7 to 13.6% Mn and averages  6.9%; averages 0.9% P2O5, 0.03% S.	Galam	Shkolnik, 1973.	Consists of six lenticular, steeply-dipping bodies in jasper beds that are contact metamorphosed zone adjacent to Late Cretaceous granite and granite porphyry.  Additional undiscovered ore bodies may occur.  Individual bodies range from 10 to 90 m thick, extend for up to 3 km, with beds of barren rock. Dominant ore mineral is magnetite that grades from massive to banded, brecciated, and fine-grained forms. Also occurring are minor pyrite, pyrrhotite, chalcopyrite, bornite, sphalerite, galena, arsenopyrite, actinolite, hornblende, cummingtonite, dannemorite, grunerite, olivine, chlorite, garnet, rhodonite, and apatite.  	Russia

N53-12	Gerbikanskoe	N	53	12	53 29 14N	133 12 18E	53.4872222222222	133.205	5329'N	13312'E	Volcanogenic Fe   	Fe		Large.  Average grade of 42-43% Fe, soluble Fe is 33-53%; average of 1.8% Mn and 9.6% P.	Galam	Shkolnik, 1973.	Consists of two zones separated by a sequence of sandstone and siltstone that consists of approximately 30 steeply-dipping sheeted and lenticular bodies composed of magnetite-hematite, magnetite, and hematite.  Individual bodies are several tens of m to 5 to 7 km long, are sometimes closely spaced in an en-echelon pattern.  Thickness varies from 5 to 50 m and is commonly 8 to 28 m.  Fe ore varies from banded to thinly-banded, lenticular-banded, and bedded and consists of finely-dispersed hematite, magnetite, and rare pyrite and chalcopyrite.  	Russia

N53-13	Kurumskoe	N	53	13	53 22 35N	132 52 40E	53.3763888888889	132.877777777778	5323'N	13253'E	Volcanogenic Fe   	Fe	Mn, S, P2O5	Small.  Averages 42% total Fe, 40% soluble Fe, 0.8% Mn, 0.4% S, 0.85% P.	Galam	Shkolnik, 1973.	Consists of steeply-dipping, lenticular and sheeted bodies of contact metamorphosed magnetite ore that ranges from 1.5 to 2.0 km long and 15-30 m thick. Bodies occur in a band up to 4.0 km long along the contact of a Late Cretaceous granodiorite.  Host rocks are mainly jasper, schist, and shale, with rare sandstone and siltstone.  Ore ranges from massive to fine-banded.  In addition to magnetite, bodies contain from1-2% each of ilmenite, pyrrhotite, chalcopyrite, arsenopyrite, and pyrite, along with actinolite, tremolite, chlorite, biotite-like mica, and quartz.  	Russia

N53-14	Itmatinskoe	N	53	14	53 21 06N	133 24 08E	53.3516666666667	133.402222222222	5321'N	13324'E	Volcanogenic Fe   	Fe	P2O5, S, Mn	Medium.  Averages 40-43% total Fe, 39-42% soluble Fe, 0.6% P, 0.05% S, 1.5% Mn.	Galam	S.G. Kostan'yuan and others, written commun., 1973.	Deposit hosted in a steep syncline that contains up to 17 conformable, lenticular, and sheeted bodies of magnetite-hydroxide iron minerals in a zone up to 4 km long and 40 to 50 km thick.  Total length of zone of bodies is 12 to 15 km and total stratigraphic thickness ranges up to 135 m. Host rocks are dark gray jasper, schist, and shale, with subordinate mafic extrusive rocks, sandstone, and sedimentary breccia.  Ore varies from massive to, banded, is fine-grained, and consists of magnetite-goethite-hydrogoethite with intergrowths of martite, manganosiderite, manganite, pyrite, and Mn hydroxides.  Other minerals are quartz, colloidal silica, Fe-bearing quartzite, clay minerals, calcite, gypsum, and actinolite. Magnetite/iron hydroxide ratio ranges from 1:2 to 1:8.  Fe hydroxides formed from weathering.  	Russia

N53-15	Poiskovoe	N	53	15	53 08 00N	132 12 00E	53.1333333333333	132.2	5308'N	13212'E	Granitoid-related Au	Au		Small. Average grade 37.4 g/t Ag. Partly mined at surface.	Selemdzha-Kerbi	N.S. Ostapenko and G.I. Neronsky, written commun., 1975.	Consist of northeast-trending, steeply-dipping quartz veins. Six veins are identified that occur for 400 m, and range from 0.25 m to less commonly 1.5 m thick. In addition to fine-grained gold (less than 0.5 mm), veins contain galena, pyrite, and arsenopyrite.  Pyrite and arsenopyrite are gold-bearing, containing 98.22 and 26.0 g/tonne Au respectively. Host granodiorite exhibits berezitie hydrothermal alteration.  Veins occur in a Late Paleozoic granodiorite that intrudes metamorphosed Paleozoic shale. Deposit interpreted as forming between Late Jurassic and Early Cretaceous.  Deposit not explored at depth. 	Russia

N53-16	Zazubrinskoe	N	53	16	53 09 00N	132 22 00E	53.15	132.366666666667	5309'N	13222'E	Au quartz vein	Au		Small.  Estimated reserves of 9,046 thousand tonnes ore grading 11.2 g/t Au. Mined from 1927 to 1947.	Selemdzha-Kerbi	O.F. Shishkanova, written commun., 1970.	Consists of gently- and steeply-dipping quartz veins with gold (fineness 750), predominante arsenopyrite, and lesser pyrite, sphalerite, galena, chalcopyrite, cassiterite, and molybdenite.  Up to 7% As.  Veins are about 2.5 m thick and up to 600 m long. Steeply-dipping veins are richest in gold.  Gold is fine-grained.  Mineralization interpreted as forming in Late Jurassic to Early Cretaceous. Deposit hosted in quartz-micaceous schist of the Nilan subterrane (Galam terrane). 	Russia

N53-17	Tokur	N	53	17	53 09 06N	132 49 29E	53.1516666666667	132.824722222222	5309'N	13249'E	Au quartz vein  	Au		Medium.  27.1 tonnes Au mined between 1933 and 1940.  	Selemdzha-Kerbi	Radkevich E.A., Moiseenko V.G., Molchanov P.Ya., Melnikov V.D., and Fat'yanov I.I., 1969;  Eirish, 1972;  Mel'nikov V.D. & Fat'yanov I.I., 1970; P.H. Layer, V. Ivanov, and T.K. Bundtzen, written commun., 1994.	Consists of gold-bearing veins. Ore minerals comprise 3% of the veins and consist of pyrite, arsenopyrite, gold, sphalerite, galena, chalcopyrite, pyrrhotite, tetrahedrite, tennantite, and scheelite. Gangue minerals are quartz, adularia, sericite, chlorite, and calcite. Gold fineness of 650 to 800. Sphalerite and arsenopyrite increase with depth. Carbonaceous material occurs along vein margins. Vein zones normally range from 25 to 90 m thick.  Veins commonly occur conformable to bedding of host rocks are are locally discordant. Veins range up to 800 m in length and vary from 0.2 to 0.7 m thick.  Maximum depth of deposit is 500 m. Host rocks are argillite, sandstone, and quartzite. Diorite dikes and stocks cut the veins.  Ar-Ar isotoipic study of adularia indicate an Early Cretaceous  age of mineralization. Veins are hosted in a structurally-deformed Middle Paleozoic sandstone-schist sequence.  	Russia

N53-18	Ingagli	N	53	18	53 03 39N	133 21 36E	53.0608333333333	133.36	5304'N	13322'E	Au quartz vein  	Au		Small. 	Selemdzha-Kerbi	Eirish, 1972.	Consists of a quartz vein hosted in a Late Paleozoic stock. Vein contains quartz, gold, arsenopyrite, pyrite, chalcopyrite, and sphalerite.  Gold fineness of 720.	Russia

N53-19	Sagurskoe	N	53	19	52 58 46N	132 35 54E	52.9794444444444	132.598333333333	5259'N	13236'E	Au quartz vein  	Au		Small.   Average grade of 0.3 to 35.2 g/t Au. 2,940 kg gold mined from 1944 to 1956. 	Selemdzha-Kerbi	Eirish, 1972;  B.I. Shestakov, written commun., 1988.	Consists of comformable quartz veins that crosscut foliation, and dip from 30 to 60.  Veins are 0.1 to 1.0 m thick and a few m to 240 m long. About 80 veins are known.  Veins contain gold (grains up to 3 mm, fineness 857), and arsenopyrite, pyrite, sphalerite, galena, sheelite, and scorodite.  Gold distributed unevenly in veins; hanging walls of veins generally richer in gold. Deposit hosted in Early Paleozoic metamorphic rocks consisting of quartz-micaceous schists with less common actinolite and epidote-actinolite schist.  	Russia

N53-20	Kharga	N	53	20	52 57 05N	133 37 37E	52.9513888888889	133.626944444444	5257'N	13338'E	Au quartz vein  	Au		Small.  Intermittently mined from 1901 until 1955; 5.3 tonnes Au produced. Contains up to 40 g/t Au, up to 2.5 g/t Ag, and up to 0.4% WO3 . 	Selemdzha-Kerbi 	Moiseenko V.G., 1965;  Eirish, 1972.	Consists of two types of veins: (1) thick veins that intrude Early Paleozoic greenstone (spilite); and (2) short, branching veins that intrude carbonaceous schist and highly altered zones in albite-micaceous-quartz schist.  Veins have constant dip thickness and along strike range from 0.5 to 3 m across and up to a few hundreds of meters long.  Quartz comprises up to 95 to 97% of veins.  Ore minerals are gold and arsenopyrite, with minor pyrite, pyrrhotite, chalcopyrite, sphalerite, tetrahedrite, and tennantite.  Scheelite occurs locally.  Two generations of gold occur, early gold is 636 fine; later gold is 800 to 950 fine.  Deposit cut by dikes. Thirty ore bodies are known, including both quartz veins and zones of hydrothermally altered rocks. Twenty-four bodies have been mined. 	Russia

N53-21	Afanas'evskoe	N	53	21	52 49 41N	133 23 32E	52.8280555555556	133.392222222222	5250'N	13324'E	Au quartz vein  	Au		Small.  Average grade of 6.3 g/t Au.  Mined from 1929 to 1949.	Selemdzha-Kerbi	Eirish, 1972; Tsykunov Yu.P., 1981; B.D. Melnikov, written commun., 1993.	Consists of quartz veins and zones of hydrothermal alteration (quartz-albite-chlorite-carbonate-sulfide).  Zones are up to 1100 m long; thickness rarely exceeds 2.0 m. Largest zone consists of a series of quartz veins and veinlets that occur in brecciated quartz- and chlortite-rich rock.  Zone is 0.1 to 1.8 m thick and grades 10 g/tonne Au. Deposit hosted in early Paleozoic sequence of micaceous-albite-quartz, chlorite-quartz shale, and metamorphosed polymictic sandstone.  	Russia

N53-22	Talaminskoe	N	53	22	52 42 00N	133 24 00E	52.7	133.4	5242'N	13324'E	Sb-Au vein	Sb, Au		Small.  Average grade of 6.94% Sb, 0.3% As, 1.5 g/t Au, 15 g/t Ag. Mined from 1938 to 1943. Produced 511 tonnes of stibnite concentrate. 	Selemdzha-Kerbi	A.F. Amerikantsev, written commun., 1953.	Consists of quartz veins, less common quartz-calcite veins, with stibnite, pyrite, chalcopyrite, and arsenopyrite, and one vein of quartz-scheelite.  Eighteen veins, dipping at 45 to 90, have been prospected.  Veins range from a few cm to 4 m thick, and from 40 to 680 m long.  Prospecting occurs to 42 m depth. Deposit interpreted as forming during a Late Jurassic to Early Crtetaceous period of regional  metamorphism. Deposit hosted in early Paleozoic micaceous schist of the Nilan subterrane.  	Russia

N53-23	Ezop	N	53	23	52 27 58N	134 10 55E	52.4661111111111	134.181944444444	5228'N	13411'E	Sn polymetallic vein   	Sn		Small.  Contains up to 0.2% Sn.  	Badzhal-Ezop	Usenko and Chebotarev, 1973.	Consists mostly of sulfide-bearing veins, net-like veinlets, and disseminations. Disseminated zones range up to 18.7 m thick; veins vary from 0.1 to 2 m thick.  Sulfides, including arsenopyrite and pyrrhotite, form up to 80% of the veins.  Pyrite, cassiterite, sphalerite, and rare stannite and wolframite, are subordinate.  Gangue minerals are quartz and tourmaline; with rare topaz.  Deposit hosted in a system of east-west en echelon fracture zones in Upper Cretaceous felsic extrusive rocks. Deposit occurs along contact of the Late Cretaceous high-potassium Ezop Granite.  	Russia

N53-24	Olgakanskoe	N	53	24	52 20 41N	134 04 17E	52.3447222222222	134.071388888889	5221'N	13404'E	Sn greisen	Sn	W, Mo, Bi	Small   	Badzhal-Ezop	Usenko and Chebotarev, 1973.	Consists of three varieties of greisen:  (1) pods and veins in granite;  (2) flattened bodies in the apices of dome-like granite cusps and partly in Late Cretaceous felsic extrusive rocks; and  (3) zones with late-stage, cassiterite-quartz and cassiterite-sulfide veinlets at the granite contacts.  Quartz-mica greisen bodies are small, several m thick, and occur in zones up to 80 m along strike.  In addition to quartz and mica, greisen contains wolframite, cassiterite, arsenopyrite; and minor molybdenite, bismuthinite, and native bismuth.  Sulfide veinlets contain arsenopyrite, sphalerite, galena, chalcopyrite, and pyrite. Deposit associated with Late Cretaceous Ezop Granite. 	Russia

N54-01	Yuzhno-Tominskoe	N	54	01	54 06 16N	142 57 10E	54.1044444444444	142.952777777778	5406'N	14257'E	Podiform Cr   	Cr		Small   	Schmidt and Terpeniya Peninsulas	Sidorenko, 1974.	Consists of of magnesium pyroxenite that contains disseminated and massive, lenticular magnesian chromite in zones up to 20 to 25 m long.  Pyroxenite is Late Jurassic to Early Cretaceous in age and intrudes Mesozoic rocks. Deposit occurs on eastern Schmidt Peninsula .	Russia

N54-02	Mnogovershinnoe	N	54	02	53 53 22N	139 48 24E	53.8894444444444	139.806666666667	5353'N	13948'E	Au-Ag epithermal vein  	Au, Ag		Medium	Lower Amur	Zalishchak and others, 1978; Ivanov and others, 1989.	Consists of hydrothermally altered, adularia-sericite-quartz vein-like zones up to 800 m long that consist of a series of adularia-quartz veins and veinlets. Some veins and veinlets contain rhodonite-carbonate or lenses of skarns and sulfides. Ore minerals are pyrite, marcasite, gold, argentite, Au and Ag tellurides, galena, sphalerite, chalcopyrite, and freibergite. Ore minerals comprise up to 1% of veins. Au/Ag ratio is 1:1. Deposit  hosted in Paleocene andesite-dacite that is part of a multiphase intrusion of highly alkaline granitic rocks. K/Ar isotopic studies indicate age of mineralization is 49 to 69 Ma. During formation of local Au-bearing skarns, presumably formed during intrusion of Paleogene subalkaline granite, gold was remobilized. Associated Placer Au deposits.	Russia

N54-03	Belaya Gora	N	54	03	53 23 00N	140 14 00E	53.3833333333333	140.233333333333	5323'N	14014'E	Au-Ag epithermal vein	Au, Ag	Hg, Cu, Pb, Zn	Medium   	Lower Amur	Mel'nikov, 1978	Consists of disseminations and stockworks that occur in extrusive bodies of subalkalic rhyolite-dacite and explosive breccia in an Eocene-Oligocene igneous complex. Alteration consists of quartz (50-90%), kaolinite, dickite, sericite, hydromica, and adularia. Ore minerals are gold, silver, argentite, pyrite, marcasite, chalcopyrite, sphalerite, galena, hematite, and cinnabar. Ore assemblages are gold-quartz and gold-sulfosalts-sulfide-quartz. Gold distribution is highly irregular and ore bodies do not exhibit clear boundaries. Deposit extends to depth of 100 m.	Russia

N54-04	Bukhtyanskoe	N	54	04	53 03 00N	140 29 00E	53.05	140.483333333333	5303'N	14029'E	Au-Ag epithermal vein  	Au, Ag		Small   	Lower Amur	Martynov and others, 1985; P.Layer, V.Ivanov, and T.Bundtzen, written commun., 1994.	Consists of lenticular and irregular mineralized zones consist of highly altered, orthoclase-adularia-sericite-pyrite-quartz rock with numerous thin quartz veinlets ranging from 5-10 mm thick. Ore minerals are gold, pyrite, marcasite, chalcopyrite, sphalerite, galena, argentite, and molybdenite. Ore-bearing assemblages are gold-quartz and gold-sulfide-quartz. Deposit explored to a depth of 50 m.  Ar-Ar isotopic study of adularia yields of age of 38 Ma for the Au-Ag veins. Deposit hosted in Eocene-Oligocene extrusive subalkaline rhyolite-dacite and explosive breccia.  	Russia

N54-05	Tyrskoe	N	54	05	52 57 21N	140 27 25E	52.9558333333333	140.456944444444	5257'N	14027'E	Porphyry Cu   	Cu	Au	Small.   Average gradc of  0.02 to 0.7% Cu; up to 2.5 g/t Au, 0.005% Mo.	Lower Amur	Sukhov and Rodionov, 1986.	Consists of disseminated sulfides, and veinlets of quartz, quartz-sulfides, and carbonate minerals.  Ore minerals are pyrite, chalcopyrite, magnetite, molybdenite, and gold. Hosted in a diorite porphyry stock that is hydrothermally altered over an area 0.5 by 20 km. Altered to orthoclase, hornblende-albite, and quartz-sericite rock.   Typical porphyry Cu deposit of the Nizne-Amur zone.  	Russia

N54-06	Bichinskoe	N	54	06	52 32 11N	139 32 24E	52.5363888888889	139.54	5232'N	13932'E	Sn greisen   	W, Sn		Small.  Avearge grade of up to 0.2% Sn, 0.155% W, and 0.01% Mo.  	Lower Amur	Usenko and Chebotarev, 1973.	Consists of a stockwork of veinlets, small veins, and greisen in granite, porphyry dikes, and hornfels over an area of 0.2 km2.  Ore minerals are cassiterite and wolframite, with rare molybdenite, arsenopyrite, pyrite, pyrrhotite, chalcopyrite, sphalerite, and magnetite.  Cassiterite, wolframite, molybdenite, and arsenopyrite form an early assemblage; other minerals form a later assemblage. Deposit occurs along contact of the Paleogene Chayatinsky granitic stock with K-Ar isotopic age of 55 Ma.  The hornfels is cut by granite porphyry, aplite, and spessartite dikes. Complex composed of granite porphyry and fine-grained granite. Age of mineralization interpreted as Paleogene.  	Russia

N57-01	Sukharikovskie Grebni	N	57	01	55 39 30N	158 38 43E	55.6583333333333	158.645277777778	5540'N	15839'E	Au-Ag epithermal vein	Au, Ag		Medium.   Average grade of 7.4 g/t Au,  21.6 g/t Ag.	Central Kamchatka	Aprelkov and Frolov, 1970; Shchepot'ev , 1989.	Consists of zones of quartz-adularia and quartz-adularia-carbonate veins that form a series of thick, long zones in a Miocene dacitic ignimbrite sequence. Some veins dip steeply, others are oblique to strike of zones. Individual veins range from 50 to 700 m long and up to 60 m thick.  Zones of veins are a few km long. Host rocks are hydrothermally altered along faults, where silica-rich and quartz-sericite-hydromica assemblages are found.  High Au and Ag concentrations occur in quartz-adularia veins.  Veins are sulfide poor.  Two main ore assemblages are gold-chalcopyrite-quartz and gold-acanthite-adularia-carbonate-quartz.  K-Ar age determinations on the host ignimbrite range 6 to 13 Ma; average is about 10 Ma.	Russia

N57-02	Kumroch	N	57	02	55 39 52N	161 09 53E	55.6644444444444	161.164722222222	5540'N	16110'E	Au-Ag epithermal vein	Au, Ag, Cu, Pb, Zn		Medium.  Up 15 g/t  Au; up to 500 g/t Ag; about 10% Pb, 3% Zn, and 0.5% Cu. Inferred reserve of 60 tonnes Au.   	East Kamchatka	B.V. Oleinik and others, written commun.,1985.	Consists of steeply dipping, quartz and quartz-adularia veins and brecciated zones that occur in Paleocene clastic rocks cut by hypabyssal Miocene diorite porphyry. Host rocks are propylitiically altered and silicified. Veins range from 200 to 400 m long and 0.2 to 6.8 m thick.  Ore minerals are pyrite, chalcopyrite, galena, gold, tennantite, tetrahedrite, argentite, and silver sulfosalts.  Gold-sulfide-quartz and gold-sulfosalt-quartz assemblages are identified. Gangue minerals are quartz, adularia, sericite, hydromicas, montmorillonite, kaolinite, and chlorite. Au is distributed unevenly. 	Russia

N57-03	Aginskoe (Aga)	N	57	03	55 30 37N	157 51 54E	55.5102777777778	157.865	5531'N	15752'E	Au-Ag epithermal vein	Au, Ag, Te		Medium.  Estimated resource of 30-50 tonnes Au and 10-20 tonnes Ag.  Average grade of 20 g/t Au.	Central Kamchatka	Shchepot'ev,1989.	Consists dominantly of fine-grained, chalcedony-like quartz, adularia, and hydromica with colloform banding. Ore minerals comprise 0.3 to 1.0% of veins. Major ore minerals are tellurides, including hessite, altaite, calaverite, silvanite, and petzite. A total of 55 ore minerals are identified. Fold fineness ranges from 740 to 990, and the Au/Ag ratio varies from 2:1 to 7:1. Six stages of ore deposition are identified: (1) quartz-pyrite; (2) gold-adularia-corrensite-quartz with a gold fineness of 924 to 968; (3) gold-adularia-quartz with a gold fineness of 936 to 952 at upper levels, and a gold fineness of 740 to 854 at deeper levels; (4) gold-calaverite-quartz with a gold fineness 940 to 960; (5) gold-hessite-corrensite-quartz with a gold fineness 816 to 880 and (6) quartz-zeolite-calcite. Endogenous zoning is marked by a vertical change of ore composition, texture, and structure. The concentration of tellurides and sulfides increases with depth. The deposit occurs in a volcanic caldera composed of Miocene basaltic andesite and basaltic andesite tuff. Ore occurs in fracture zones and zones of intense jointing. Ore-bearing structures consist of shear and breccia tectonic zones, which include numerous andesitic dikes and veins, lenses, and veinlets of adularia-quartz and quartz-carbonate composition. The main ore-bearing zones are at Aginskaya and Surpriz. In the main ore-bearing zones, short ore bodies merge at depth forming a gently-dipping mineralized band; complicated in the upper part by steeply-dipping ore shoots. Hydrothermal alteration, commonly propylitic, is common. 	Russia

N57-04	Shanuch	N	57	04	55 08 33N	157 12 11E	55.1425	157.203055555556	5509'N	15712'E	Hornblendite peridotite Cu-Ni	Ni, Cu, Co, Au, Pt		Small.  Average grade of 4.62% Ni, 0.8% Cu, 0.24% Co, 0.3 g/t Au, 0.5 g/t Pt, 0.57 g/t Pd	Kvinumsky	A.V. Ignatyev, written commun., 1979.	Consists of two deposits that occur at the margin of a granite-granitic-gneiss dome approximately 5 km in diameter that intrude an Early Cretaceous metagabbro. One deposit, explored to a depth of 200 km, consists of a steeply-dipping pipe-like body with a northwest trend.  This deposit consists of rich, massive, brecciated sulfide ore.  The other deposit consists of disseminated sulfides, and sulfides in veinlets, and pods.  Both deposits are presumed to join at a depth of about 200 m.  Massive and brecciated ore contains an average of 4.62% Ni, 0.8% Cu, 0.24% Co, 0.3 g/t Au, 0.5 g/t Pt, and 0.57 g/t Pd.  In both deposits, ore minerals are mainly pyrrhotite, pentlandite, and chalcopyrite. Deposit oxidized to a depth of about 10 m.	Russia

N57-05	Kirganik	N	57	05	55 00 48N	157 37 35E	55.0133333333333	157.626388888889	5501'N	15738'E	Porphyry Cu	Cu, Au		Medium.  Average grade of 0.1-1% Cu and 0.2 to 0.4 g/t Au in disseminated and veinlet ore; up to to 0.8 g/t Au in oxidized ore.	Iruneiskiy	Vlasov, 1977; A.V. Ignatyev, written commun., 1980.	Consists of zones of disseminated ore and veinlet copper and gold minerals. Ore minerals are pyrite, chalcopyrite, magnetite, bornite, chalcocite, hematite, and gold. The richest Au values occur in rich chalcocite-chalcopyrite-bornite ore with more than 1% Cu.  An oxidized zone occurs in heavily fractured rocks, to a depth of 100 to 120 m, and contains up to 0.8 g/t Au. The richest ore consists of metasomatically-altered biotite-K-feldspar rock. Altered rocks containing both pyroxene and K-feldspar are essentially devoid of ore. Ore zones are generally conformable with the host rocks. Zones are steeply-dipping, exhibit biotite-K-feldspar metasomatic alteration, and occur in an area 10-15 m thick, up to 1200 m long. Deposit hosted in Late Cretaceous siliceous volcanic rocks. K-Ar isotopic age of the altered biotite-K-feldspar rocks is 65-75 Ma. 	Russia

N57-06	Baran'evskoe	N	57	06	55 05 33N	158 12 44E	55.0925	158.212222222222	5506'N	15813'E	Au-Ag epithermal vein	Au, Ag		Medium.  Average grade of 15 g/t, Au  20-30 g/t Ag.	Central Kamchatka	Shchepot'ev, 1989.	Consists of gold-bearing quartz-adularia veins that are associated with quartz-sericite-hydromica and diaspore-quartz alteration assemblages. Veins occur along northeast and north-south trending faults. Two ore assemblages are identified,  tennantite-tetrahedrite-chalcopyrite and gold-quartz.  Gold is fine-grained, and fineness ranges from 672 to 940, commonly about 770. Deposit occurs in a caldera of a Neogene volcanic complex consisting of stocks of hornblende and pyroxene-hornblende andesite and andesite-dacite. Complex is cut by hypabyssal subvolcanic andesite to dacite intrusions and dikes. Igneous rocks are propylitically altered.  	Russia

N57-07	Oganchinskoe	N	57	07	54 56 52N	157 45 40E	54.9477777777778	157.761111111111	5457'N	15746'E	Au-Ag epithermal vein	Au, Ag		Small. Average grade of  10-15 g/t  Au and  20-30 g/t Ag. Reserves of 2 tonnes Au.	Central Kamchatka	Shchepot'ev, ed., 1989	Consists of veins and veinlets. Ore minerals are gold, galena, sphalerite, pyrite, chalcopyrite; and rare tetrahedrite, hessite, petzite, argentite, silver sulfosalts, and cinnabar.  Seven mineral assemblages are distinguished, from oldest to youngest:  (1) pyrite-quartz; (2) Au-quartz; (3) Au-sulfides (sphalerite and galena); (4) amethist-sulfides (sphalerite and galena); (5) wurtzite (sphalerite)-metacinnabatite; (6) cinnabar; (7) quartz-carbonate.  Gold and silver occur in gold-quartz and gold-sulfide assemblages.  The gold-sulfide assemblage increases with depth.  Deposit exhibits both propylitic and silicifica alteration. K-Ar isotopic age of 35-36 Ma for adularia associated with deposit. Ore bodies trend northeast and are hosted occur in volcanic and hypabyssal rocks near the caldera of the Levinson-Lessing volcano, near the western contact of a Miocene granodiorite stock. 	Russia

N57-08	Zolotoi	N	57	08	55 03 20N	158 21 26E	55.0555555555556	158.357222222222	5503'N	15821'E	Au-Ag epithermal vein	Au, Ag		Medium.  Average grade of 10-125 g/t Au, 40 g/t Ag.  

	Central Kamchatka	A.A. Shadrin, written commun., 1992.

	Consists of veins in a large northwest-trending shear zones, spaced up to 2 km apart. Richest orebodies occur in a small fault/fracture zone that trends diagonally to the main shear zones.  Deposit occurs over an area of about 40 km2.  Gold is known in 100 quartz veins, but only 11 are of interest for exploration.  Veins are up to 20 m thick and up to 2 km long.  Mineralization occurs from about 500 to 1100 m elevation.  The most carefully studied vein is 2.7 m thick, 700 m long, has a gold content of 10-125g/t, and silver content of 40 g/t.  The gangue minerals are quartz (90%), calcite, hydromica, and adularia (up to 10%).  Ore minerals (no more than 2%) are pyrite, chalcopyrite, galena, sphalerite, and argentite.  Gold grains are 0.05-0.2 mm.  Gold fineness is 720-980.  Deposit hosted in Late Cretaceous volcanoclastic rocks (andesite tuff) and chert, near the contact with overlapping Miocene andesite and basalt.  An economically important Au deposit in Kamchatka.

	Russia

N57-09	Malakhitovoe	N	57	09	54 45 41N	157 20 30E	54.7613888888889	157.341666666667	5446'N	15721'E	Porphyry Cu-Mo	Cu, Mo	Re	Medium.  Average grade of 0.55% Cu and 0.021% Mo in oxidized zone. Contains up to 1.26% Cu and 0.1% Mo.  	Sredinny 	A.V. Ignatyev, written commun., 1988.	Consists of a Cu-Mo stockwork hosted in subalkaline granite porphyry stock. Richer part of deposit occurs along contact of stock. Both stock and the country rocks exhibit sericite, chloritie, and silica alteration and contain disseminations and veinlets of ore minerals. A central, quartz-rich core consists of silicified and K-feldspar-rich rocks with low-grade chalcopyrite-molybdenite that contains 0.03% Cu and 0.008% Mo. Quartz veinlets are up to one cm wide, rarely up to 0.4 m wide, and contain coarse-grained flakes of molybdenite.  Richest part of deposit crops out over an area 200-300 by 600 m, and contains 0.4% Cu and 0.02% Mo.  Oxidized zones average 0.55% Cu and 0.021% Mo;  locally contains up to 1.26% Cu and 0.1% Mo. Molybdenite contains up to 600 g/t Re. Deposit size approximately 2.5 km2.	Russia

N57-10	Tumannoe	N	57	10	54 21 12N	157 22 52E	54.3533333333333	157.381111111111	5421'N	15723'E	Au quartz vein	Au		Small.  Average grade of 0.4-2.2 g/t Au and 3 g/t Ag.	Sredinny	D.A. Babushkin and others, written commun., 1986.	Deposit  consists of a stockwork hosted in quartz phyllite interbedded with Late Paleozoic metasandstone and metasiltstone.  Major ore minerals are gold, arsenopyrite, and pyrite, with rare chalcopyrite and magnetite.  Mineralized zones are 30 to 115 m long and 20 to 50 m thick.  Deposit probably remobilized from black shale.	Russia

N57-11	Anomalnoe	N	57	11	54 04 17N	157 23 43E	54.0713888888889	157.395277777778	5404'N	15724'E	Metamorphic REE(?)	Ta, Nb		Small.  Average grade if 0.02% Ta, 0.04%Nb.	Sredinny	D.A. Babushkin and others, written commun., 1986.	Consists of a quartz vein associated with K-feldspar and albite alteration. Deposit hosted in Proterozoic schist.  Vein trends north-south and forms a steeply-dipping ore body over 1 km long, and from1 to 12.5 m thick. Ore minerals are columbite-tantalite and ilmenite-rutile, with accessory K-feldspar, albite, and rare epidote grains.  K-Ar K-feldspar age of 170 Ma for vein.	Russia

N57-12	Krasnogorskoe	N	57	12	53 58 15N	157 27 50E	53.9708333333333	157.463888888889	5358'N	15728'E	Porphyry Co-Mo	Mo		Small.  Average grade of 0.04 to 0.1% Mo, 0.9% Cu.  	Central Kamchatka	M.A. Sukharev, written commun., 1957.	Consists of a series of thin intersecting sulfide veinlets (10 to 30 per 1 m length) with pyrite, chalcopyrite, molybdenite, and pyrrhotite; as well as disseminated sulfides. Quartz veins with mostly molybdenite range up to 30 cm thick and up to tens of meters long. Ore minerals are molybdenite, chalcopyrite, and pyrite. Molybdenite contains up to 500 g/t Re. Deposit occurs along contact of Miocene diorite porphyry with Proterozoic gneiss and occurs along an east-west trending fracture zone that dips 50-80 south. 	Russia

N57-13	Kvinum	N	57	13	53 37 59N	157 02 07E	53.6330555555556	157.035277777778	5338'N	15702'E	Gabbroic Cu-Ni	Ni, Cu, Co, Au, Pt		Small. Up to 1.0% Ni, 0.5% Cu, 0.03% Co, 0.5 g/t PGE.	Kvinumsky	A.C. Gamovsky, written commun., 1990.	Consists of disseminations and scattered pods of syngenetic and epigenetic breccia-like bodies. Ore minerals are pentlandite, chalcopyrite, gold, PGE, pyrrhotite, and Ni- and Co-arsenides. Hosted in pyroxenite-peridotite-norite at the base of gabbro-peridotite intrusions that occur along a thrust zone at the contact of Proterozoic schist and Late Paleozoic phyllite. Host rocks are regionally metamorphosed, ranging from chlorite-biotite subfacies of greenschist facies to epidote-amphibolite facies.  	Russia

N57-14	Kuvalorog	N	57	14	53 27 55N	157 23 44E	53.4652777777778	157.395555555556	5328'N	15724'E	Hornblendite peridotite Cu-Ni	Ni, Cu, Co, Pt		Small.  Average grade of 0.1-9.8% Cu, 0.1-4.4% Ni, 0.1-0.04% Co, 0.1-6.7 g/t Pt.  	Kvinumsky	V.P. Zotov, written commun., 1982.	Consists of steeply-dipping ore bodies in lenses and veins. Ore minerals are pyrrhotite, pentlandite, chalcopyrite, pyrite, magnetite, cobaltite, and marcasite. Hosted in lopolith-shaped multiphase Early Cretaceous Kuvalorog intrusion that includes gabbro, norite, and peridotite and intrudes Late Paleozoic and Proterozoic metamorphosed rocks.  	Russia

N57-15	Kitkhoi	N	57	15	53 25 31N	158 17 23E	53.4252777777778	158.289722222222	5326'N	15817'E	Au-Ag epithermal vein	Au, Ag, Zn, Pb		Small.   Average grade of 2-3 g/t Au, up to 100 g/t Ag.	East Kamchatka	Vlasov, 1977.	Deposit consists of veins and stockworks in a zone extending tens of km.  Deposit contains Au, Ag, Pb, and Zn. Major ore minerals are sphalerite, galena, chalcopyrite, and pyrite. Gangue minerals are quartz, carbonate, chlorite, epidote, rare albite, prehnite, and adularia.  Ore minerals are concentrated along vein contacts in thin veinlets and disseminations. Deposit occurs on both sides of the contact of a diorite porphyry stock that intrudes Miocene volcanic rocks. Age of mineralization interpreted as Middle Miocene.  	Russia

N57-16	Rodnikovoe	N	57	16	52 50 25N	158 16 00E	52.8402777777778	158.266666666667	5250'N	15816'E	Au-Ag epithermal vein	Au, Ag		Medium.  Average grade of 11.3 g/t Au and 40-50 g/t Ag. Estimated reserves of 40 tonnes gold.	East Kamchatka	I.D. Shchepot'ev, 1989; D. Petrenko, written commun., 1991.	Consists of a major vein, and related quartz and quartz-carbonate veins and veinlets in the apical part of a gabbro-diorite intrusion. Veins and veinlets contain goldfieldite, silver sulfosalts, and argentite. Gold fineness of 400 to 600. Alteration includes propylitic, (chlorite-carbonate and epidote-chlorite), kaolinitic, quartz-hydromica alteration with montmorillonite, and silicic with quartz and pyrite. Altered rocks are laterally zoned. Deposit occurs in a complex vein system with several funnel-shaped ore shoots that narrow with depth. Shoots dip 30-50 south. Vertical extent of deposit less than 150 m. High Au concentrations (25-30 g/t) occur in upper level of deposit. Quartz-adularia veins with K-Ar ages of approximately 12 Ma. 	Russia

N57-17	Mutnovskoe	N	57	17	52 44 04N	158 23 44E	52.7344444444444	158.395555555556	5244'N	15824'E	Au-Ag epithermal vein	Au, Ag, Cu, Zn, Pb		Medium. Up to 3 g/t Au and 10 g/t Ag. Reserves for North deposit are 1.8 million tonnes ore averaging 16 g/t Au and 315 g/t Ag. Reserves for the South deposit are 5.2 million tonnes ore averaging 12.4 g/t Au, 1300 g/t Ag, and 69,000 tonnes combined Pb and Zn. 	East Kamchatka	Shchepot'ev, 1989; I.D. Petrenko, written commun., 1991; Lattanzi and others, 1995.	Consists of a thick vein and some apophyses, with intervening zones of quartz veinlets. Heavily weathered zones, generally at the Southern deposit, contain quartz with10-18% sulfides. Less weathered Northern deposit  is sulfide-poor and contains 0.2-2% base metals. Major ore assemblages are gold-tennantite-tetrahedrite, gold-argentite-pearsite, and chlorite-galena-sphalerite. Canfieldite, as well as the telluride minerals, hessite and altaite, also occur. Deposit is vertically zoned, with gold, tennantite, and tetrahedrite that occur in upper part of the veins, and chalcopyrite, galena, sphalerite occurring in the lower part of the veins. Deposit extends to a depth of 500 m below the surface. Hosted in the central part of a paleovolcano composed of Oligocene-Miocene mafic- and intermediate-composition volcanic rocks. Plutonic rocks consist of Miocene diorite intrusions and numerous dikes of varied composition. Age of mineralization is interpreted as Oligocene to Early Miocene.   	Russia

N57-18	Asachinskoe	N	57	18	52 07 33N	157 54 16E	52.1258333333333	157.904444444444	5208'N	15754'E	Au-Ag epithermal vein	Au, Ag, Se		Medium.  Up to 20 g/t Au and 40-50 g/t Ag.  Estimated reserve of 1.56 million tonnes averaging 35 g/t Au and 62 g/t Ag. 	East Kamchatka	Shchepot'ev, 1989; A.I. Pozdeev, written commun., 1991.	Consists of a zone of quartz-adularia veins that occur along a north-south trending, strike-slip fault.  Veins split and pinch out in tuff and andesitic lava.  Ore body is a nearly flat-lying band, gently dipping to the south, and conformable to the hypabyssal host rocks. Ore exhibits colloform-banded structure. Ore minerals comprise less than 1% of the veins. Ore mineral assemblages are: gold-hydromica, gold-naumanite-polybasite, and gold-adularia-quartz.  Major ore minerals are pyrite, gold, selenium polybasite, and naumanite. Deposit occurs in center of a hypabyssal dacite dome at the intersection of three large linear faults.  Deposit associated with hypabyssal volcanic rocks that are inferred in cross-section. K-Ar isotopic age of 12 Ma for adularia associated with deposit.	Russia

O04-01	Kagati Lake	O	04	01	59 52 00N	159 54 00W	59.8666666666667	-159.9	5952'N	15954'W	Sb-Hg vein	Sb, Hg		No data; minor production	Southwestern Kuskokwim Mountains	Sainsbury and MacKevett, 1965	Stibnite, cinnabar, and quartz veinlets along joint surfaces in a stock of Late Cretaceous monzonite and granodiorite.  The zone of veinlets strikes northwest-southeast, varies from 10 to 600 cm thick, and is traceable for 15 m.  The stock intrudes Lower Cretaceous volcaniclastic rocks of the Gemuk Group.  Workings consist of several trenches and a few pits.  Sporadic development from 1927 through 1981.  	Alaska

O04-02	Kemuk Mountain	O	04	02	59 44 00N	157 45 00W	59.7333333333333	-157.75	5944'N	15745'W	Zoned mafic-ultramafic	Fe, Ti, PGE		Estimated 2,200 million tonnes grading 15 to 17 % Fe, and 2 to 3 % TiO2	Southwestern Alaska	Humble Oil and Refining Company, written commun., 1958; Eberlein and others, 1977; Charles C. Hawley, written commun., 1980	Buried titaniferous magnetite deposit in crudely zoned pyroxenite, interpreted as part of zoned "Alaskan-type" ultramafic pluton.  Steeply-dipping, high-temperature contact metamorphic zone with adjacent Permian quartzite and limestone.   Aeromagnetic survey indicates pluton about 1,500 m thick and underlies about 6 km2 area.	Alaska

O04-03	Rex	O	04	03	57 12 00N	157 00 00W	57.2	-157	5712'N	15700'W	Porphyry Cu	Cu, Au		No data	Alaska Peninsula and Aleutian Islands	Thomas K. Bundtzen, written commun., 1984; Frederic H. Wilson, written commun., 1985	Stockwork of chalcopyrite, pyrite, and molybdenite in disseminations and coatings on joint surfaces in series of intensely fractured, small hypabyssal andesite stocks.  Hematite zones in brecciated hornfels in contact metamorphic aureoles.  Stock about 3 sq km in area.  Stocks intrudes the lower Tertiary Tolstoi Formation and overlying volcanic rocks of the Meshik Formation.  K-Ar ages of stocks and hydrothermal alteration range from 34 to 39 Ma.  Drilling in 1977.	Alaska

O04-04	Kilokak Creek	O	04	04	57 11 00N	156 24 00W	57.1833333333333	-156.4	5711'N	15624'W	Polymetallic vein(?)	Pb, Zn		No data	Alaska Peninsula and Aleutian Islands	Frederic H. Wilson, written commun., 1985	Zone of alteration and sparse veins with anomalous Pb and Zn values in black siltstone of the Upper Cretaceous Hoodoo Formation, and shallow-water to nonmarine sandstone, shale, and conglomerate of the Chignik Formation, and in Eocene(?) volcanic and hornblende andesite plug.  Little alteration of andesite plug; extensive disseminated pyrite in country rock surrounding plug.  Zone of alteration and sparse veins on periphery of, but predates, the Pliocene Agripina Bay (granodiorite) batholith. 	Alaska

O04-05	Mike	O	04	05	57 03 00N	157 13 00W	57.05	-157.216666666667	5703'N	15713'W	Porphyry Mo	Mo	Au, Ag, Pb, Zn	No data	Alaska Peninsula and Aleutian Islands	Frederic H. Wilson and Dennis P. Cox, written commun., 1985; Robert L. Detterman, oral commun., 1986	Area of intense silicic alteration, and weak propylitic and potassic alteration, with disseminated molybdenite, pyrite, and chalcopyrite on joint surfaces with local pyrite zones.  Alteration and mineralization occur in fractured Pliocene dacite and rhyodacite stock intruding sandstone, conglomerate, and siltstone of the Jurassic Naknek Formation.  Samples with anomalous Au, Ag, and Mo from center of altered zone, and with anomalous Pb and Zn on periphery of altered zone.  K-Ar age of 3.65 Ma for stock.  Drilling in 1977.	Alaska

O04-06	Cathedral Creek, Braided Creek	O	04	06	56 30 00N	158 44 00W	56.5	-158.733333333333	5630'N	15844'W	Polymetallic vein	Cu, As, Zn, Pb		No data	Alaska Peninsula and Aleutian Islands	R.F. Robinson, written commun., 1975; Cox and others, 1981; Wilson and Cox, 1983; Frederic H. Wilson, written commun., 1985	Quartz, arsenopyrite, sphalerite, chalcopyrite, and galena in veins adjacent to various late Tertiary stocks of pyroxene andesite, hornblende andesite, and biotite dacite.  Textures and field relations indicate shallow emplacement of stocks.  Minor chalcopyrite and pyrite in zones of sericitic alteration of stocks and adjacent sedimentary rocks.  Stocks intruded into the Chignik, Hoodoo, Tolstoi, and Meshik Formations.  Stock at Cathedral and Bee Creek, and others in area aligned along 65 km east-west-trending lineament that ends at Black Peak, a Holocene volcanic center.	Alaska

O04-07	Mallard Duck Bay	O	04	07	56 14 00N	158 30 00W	56.2333333333333	-158.5	5614'N	15830'W	Porphyry Cu-Mo and(or) polymetallic vein(?)	Cu, Mo		No data	Alaska Peninsula and Aleutian Islands	Wilson and Cox, 1983	Pyrite, chalcopyrite, and molybdenite veinlets in swarms concentrated along intersections of joint systems in Oligocene andesite flows, breccias, and lahars.  Cut by numerous diorite dikes.  Intense sericitic alteration over several square kilometers with weak propylitic alteration to northwest.  	Alaska

O04-08	Bee Creek	O	04	08	56 31 00N	158 24 00W	56.5166666666667	-158.4	5631'N	15824'W	Porphyry Cu	Cu, Au		Grab samples contain up to 0.25% Cu, 0.01% Mo, 0.06 g/t Au.  Estimated 4.5 to 9.1 million tonnes grading 0.25% Cu, 0.01% Mo, and trace Au	Alaska Peninsula and Aleutian Islands	E.D. Fields, written commun., 1977; Cox and others, 1981; Wilson and Cox, 1983; Robert L. Detterman, oral commun., 1986	Disseminated chalcopyrite in arkosic sandstone near late Tertiary hypabyssal dacite stock.  Zonal alteration pattern with a potassic-altered core, and a propylitically altered periphery.  Sericite alteration superposed on both core and periphery.  Altered part of dacite stock about 3 sq km in area.  Stock intruded into the Upper Jurassic Naknek Formation.	Alaska

O04-09	Warner Bay (Prospect Bay)	O	04	09	56 10 00N	158 20 00W	56.1666666666667	-158.333333333333	5610'N	15820'W	Porphyry Cu, Polymetallic vein	Cu, Mo, Pb, Zn		Average grade of 0.3% Cu, unknown Mo grade	Alaska Peninsula and Aleutian Islands	Atwood, 1911; Wilson and Cox, 1983; Thomas K. Bundtzen, written commun., 1984	Disseminated molybdenite and chalcopyrite along joint surfaces in closely jointed granodiorite.  Galena and sphalerite in veins parallel to main set of joints, or in distinct hematite-rich breccia zones.  Occurs in several square kilometer area in the late Tertiary Devils batholith which ranges from quartz diorite to granodiorite.  Little to no sericite or argillic alteration.  Diatreme or breccia pipe at north end of deposit contains clasts of propylitically altered granodiorite cemented by galena, sphalerite, pyrite, calcite, and zeolites.	Alaska

O04-10	Canyon Creek	O	04	10	59 38 00N	161 08 00W	59.6333333333333	-161.133333333333	5938'N	16108'W	Ironstone	Fe		Not estimated.	Kilbuck	Bruce Hickok, T.K. Bundtzen, and M.L. Miller, written commun., 1992.	Deposits consists of rhythmically-layered hematite, magnetite, and siderite in layers up to 4 cm thick that occur in bleached Early Proterozoic quartzite (Bruce Hickok, T.K. Bundtzen, and M.L. Miller, written commun., 1992). The host rocks are mainly quartzite, garnet-biotite schist, metafelsic volcanic rocks, and amphibolite that are metamorphosed at amphibolite facies. The occurrence is about 150 m long, but is poorly exposed.	Alaska

O05-01	Pebble Copper	O	05	01	59 53 00N	155 24 00W	59.8833333333333	-155.4	5953'N	15524'W	Porphyry Au-Cu	Au, Cu, Mo		Inferred reserves of 500 million tonnes grading 0.35% Cu, 0.4 g/t Au, 0.015% Mo	Eastern-Southern Alaska	Phil St. George, and T.K. Bundtzen, written commun., 1991; Bruce Bouley, oral commun., 1992	Disseminated chalcopyrite, pyrite, and molybdenum, accompanied by minor to trace galena, sphalerite, and arsenopyrite in stockwork vein system.  Mineralization hosted in early Tertiary granodiorite porphyry and adjacent hornfels aureole.  Granodiorite is part of larger composite 40 square km volcanic-plutonic complex that includes pyroxenite, alkali gabbro, quartz monzonite, and dacite volcanic overlyers.  Chemically, volcanic and plutonic rocks plot in alkali-calcic and quartz alkali fields.  Sulfides were introduced during late stage intense hydrofracture episode that was preceded by potassic, silicic, and sericitic alteration events.  Tourmaline breccias locally present.  Two K-Ar ages of 90 and 97 Ma, respectively, on hydrothermal sericite and igneous K-Spar.  	Alaska

O05-02	Fog Lake (Pond)	O	05	02	59 31 00N	154 23 00W	59.5166666666667	-154.383333333333	5931'N	15423'W	Au-Ag epithermal vein	Au, Cu, Ag		Grab samples with up to 37 g/t Au, 5 g/t Ag, >0.5% Cu	Alaska Peninsula and Aleutian Islands	Reed, 1967; Gary L. Andersen, written commun., 1984	Zone with swarms of pyrite- and chalcopyrite-bearing veinlets that cut altered quartz porphyry that intrudes Tertiary dacite tuffs, lahars, and breccias.  Zone about 550 by 305 m.  Veinlets are best developed at intersections of northwest-, northeast-, and east-northeast-trending structures.  Envelopes of argillic alteration about 7 cm wide adjacent to veinlets.  Outer, weaker propylitic alteration.  To the northwest, mineralization grades into sphalerite and minor galena with anomalous Ag and Au.  Quartz porphyry altered to sericite and pyrite; propylitic alteration in adjacent volcanic rocks.  Dacite tuffs, lahars, and breccia, and associated agglomerate and conglomerate unconformably overlie Late Cretaceous to Paleocene(?) quartz diorite to granodiorite pluton.  Andesite to dacite dikes crosscut volcanic rocks.	Alaska

O05-03	Kuy	O	05	03	59 16 00N	154 38 00W	59.2666666666667	-154.633333333333	5916'N	15438'W	Au-Ag epithermal vein	Au, Ag, Cu		No data	Alaska Peninsula and Aleutian Islands	Gary L. Andersen, written commun., 1984	Quartz veins and quartz-vein breccia with gold-silver tellurides and chalcopyrite.  Veins occur in gash fractures that strike west-northwest and dip steeply southeast.  Fracture zone about 300 m wide and 900 m long.  Veins exposed for about 90 m along strike.  Abundant vugs and comb quartz.  Quartz bodies form flattened rods that plunge steeply southeast.  Veins and fracture system occur in dacite tuff-breccia that is the upper part of a dissected Tertiary summit caldera.  Fracture zone exhibits intense argillite and pyrite alteration; silicic alteration occurs in narrow envelope surrounding quartz veins.  Basement is Mesozoic(?) sedimentary rocks.  	Alaska

O05-04	Crevice Creek (McNeil)	O	05	04	59 08 00N	154 40 00W	59.1333333333333	-154.666666666667	5908'N	15440'W	Cu-Au skarn	Au, Cu	Ag, Fe	Produced 11 tonnes from high-grade zones, with 4.5 g/t Au, 514 g/t Ag, and 17.5% Cu	Alaska Peninsula	Martin and Katz, 1912; Richter and Herreid, 1965	At least ten epidote-garnet skarn bodies occur in limestone over a 2 km2 area adjacent to southwest part of the Jurassic(?) granodiorite stock of Pilot Knob.  Skarn bodies 3 to 800 m long and a few centimeters to 60 m wide.  Magnetite-rich skarn in isolated pods in nearby metavolcanic rocks.  Skarn bodies developed in limestone, chert, and argillite of the Upper Triassic Kamishak Formation and in overlying metavolcanic rocks of the Jurassic Talkeetna Formation.  Local disseminated magnetite zones in epidote-garnet skarns.  Largest skarn body at Sargent Creek contains epidote, garnet, actinolite, quartz, pyrite, and chalcopyrite.  Lenses up to 1 m wide and 10 m long average 7% Cu.  Numerous magnetic anomalies in area surrounding granodiorite stock.	Alaska

O05-05	Nuka Bay District (Nualaska, Lost Creek, Alaska Hills)	O	05	05	59 33 00N	150 35 00W	59.55	-150.583333333333	5933'N	15035'W	Au quartz vein	 Au		Produced about 258,000 g Au; channel samples contain from 1 to 300 g/t Au	Chugach Mountains	Richter, 1970	Quartz veins up to 1.0 m wide and 100 m long with sparse gold, arsenopyrite, pyrite, chalcopyrite, and galena.  Veins of irregular shape with local pinching and swelling generally strike east-west, normal to regional structure.  Veins mainly fissure fillings in metagraywacke and to lesser extent in phyllite of the Upper Cretaceous Valdez Group.  Veins probably fill tensional cross joints formed during late stages of regional folding of host rocks.  Sparse Tertiary quartz diorite dikes are cut by quartz veins.  Several mines and prospects.  Explored and developed from about 1909 to 1940.  About 1,300 m underground workings.  Minor subsequent mining activity.  	Alaska

O05-06	Red Mountain	O	05	06	59 22 00N	151 30 00W	59.3666666666667	-151.5	5922'N	15130'W	Podiform Cr	Cr		Two largest deposits are estimated to contain 87,000 tonnes of about 25 to 43% Cr2O3.  One additional low-grade deposit with 1.13 million tonnes Cr2O3	Kodiak Island and Border Ranges	Guild, 1942; Bundtzen, 1983b; Burns, 1985; Foley and Barker, 1985; Foley and others, 1985	Layers and lenses of chromite concentrated in several areas several hundred meters long and 60 m wide in dunite tectonite.  Largest chromite layer about 190 m long and up to 1.5 m wide.  More than 10 smaller ore bodies.  Occurs in Early Jurassic or older dunite tectonite interlayered with subordinate pyroxenite in zones about 60 m thick.  Locally abundant serpentinite, especially at contacts of bodies.  Ultramafic rocks part of the Early Jurassic or older, informally named, Border Ranges ultramafic and mafic complex of Burns (1985). Faulted at base.  Sporadic exploration and development from about 1919 to present.  Several hundred meters of underground workings and trenches.  About 26,000 tonnes of ore, ranging from 38 to 42% Cr2O3, produced from 1943 to 1957.  Nearby Windy River chromite placer deposit in glaciofluvial sand and gravel deposits downstream from Red Mountain, is estimated to contain 15.6 million m3 with 1.33% Cr2O3.	Alaska

O05-07	Claim Point	O	05	07	59 12 00N	151 49 00W	59.2	-151.816666666667	5912'N	15149'W	Podiform Cr	Cr		Estimated 82,000 tonnes Cr2O3.  Produced about 2,000 tonnes of chromite	Kodiak Island and Border Ranges	Guild, 1942; Burns, 1985; Foley and Barker, 1985	Layers and lenses of chromite up to 60 m long and 14 m wide, over area of about 500 by 500 m, in Early Jurassic or older dunite tectonite.  About 14 separate deposits.  Few olivine-pyroxene dikes; locally abundant serpentinite.  Ultramafic rocks part of Early Jurassic or older, informally named Border Ranges ultramafic and mafic complex of Burns (1985). Faulted at base.  Explored and developed from about 1909 to 1919.  Mining from 1917 to 1918.  Several hundred meters of underground workings and trenches.  Sporadic exploration since; most recently in mid-1980's.  	Alaska

O05-08	Chalet Mountain (Cornelius Creek)	O	05	08	57 48 00N	152 20 00W	57.8	-152.333333333333	5748'N	15220'W	Au quartz vein	W, Au, Ag		Grab samples with up to 1.75% WO3, 9.6 g/t Au, 120g/t Ag	Chugach Mountains	Seitz, 1963; Rose and Richter, 1967	Silicified zones and quartz veins with disseminated scheelite and gold(?) occur within a 100 by 500 m area of silicified metagraywacke of the Upper Cretaceous Kodiak Formation at Chalet Mountain, and in nearby granodiorite pluton at Anton Larsen Bay.  Scheelite concentrated in silicified zones localized in calcareous-rich part of metagraywacke.	Alaska

O05-09	Halibut Bay	O	05	09	57 22 00N	154 36 00W	57.3666666666667	-154.6	5722'N	15436'W	Podiform Cr	Cr		Eight low-grade deposits with estimated 180,000 tonnes Cr2O3	Kodiak Island and Border Ranges	Foley and Barker, 1984; Burns, 1985	Scattered small layers and lenses of chromite in dunite and subordinate clinopyroxenite tectonite in areas up to 300 m long and about 100 m wide.  Ultramafic rocks part of the Early Jurassic or older, informally named Border Ranges ultramafic and mafic complex of Burns (1985). Faulted at base.	Alaska

O08-01	Nunatak (Muir Inlet)	O	08	01	58 59 18N	136 06 00W	58.9883333333333	-136.1	5859'N	13606'W	Porphyry Mo-Cu	Mo	Cu	Medium.  Main stockwork contains estimated 2.03 million tonnes grading 0.067% Mo and 0.16% Cu; remaining stockwork contains estimated 117.5 million tonnes grading 0.026% Mo and 0.18% Cu.	Central-Southeastern Alaska	MacKevett and others, 1971; Brew and others, 1978, 1991; Berg, 1984.	Consists of numerous closely spaced molybdenite-bearing quartz veins, stockwork, and minor disseminated molybdenite in hornfels, skarn, and a mineralized fault zone that occur around a Tertiary(?) granite porphyry stock.  Disseminated sulfides in granite porphyry include varying amounts of pyrite, pyrrhotite, chalcopyrite, and sparse tetrahedrite and bornite.  Some massive sulfide pods occur in silicified skarn adjacent to stock in calcareous sedimentary rocks. Granite porphyry intrudes tightly folded Paleozoic metasedimentary rocks.	Canada

O08-02	Windy Craggy (Alsek River Area)	O	08	02	59 44 18N	137 45 00W	59.7383333333333	-137.75	5944'N	13745'W	Cyprus massive sulfide	Cu, Co	Au, Ag	Large - World Class.  Reserves of 265.7 million tonnes grading 1.44% Cu, 0.070% Co, 0.20 g/t Au.	Alexander	Cordilleran Geology and Exploration Roundup, 1990; EMR Canada, 1989; Harper, 1992; Schroeter & Lane, 1991; G. Harper, Massive sulphide potential of the northwestern Cordillera of British Columbia and the significance of the Alta Basin, Geddes Resources Ltd., written commun., 1992; MacIntyre and others, 1993.	Consists of two principal massive pyrrhotite, pyrite and chalcopyrite bodies that are hosted in Upper Triassic basaltic volcanic flows and intercalated siltstone and limestone.  Both zones have adjacent sulfide stringer stockworks. Stockwork more extensive at North Zone.  Reserves for the North zone are 148.3 million tonnes grading 1.44% Cu, 0.066% Co, 0.23 g/t Au and 4.16 g/t Ag.  Reserves for the South zone are 117.5 million tonnes grading 1.44% Cu, 0.075% Co, 0.16 g/t Au and 3.37 g/t Ag.  Additional 31.7 million tonnes are reported for the Ridge and other massive sulfide zones in the Windy Craggy mountain area.  Five additional stratiform Cu occurrences were discovered in the area in 1992.  Deposit age interpreted as Late Triassic. 	Canada

O08-03	O'Connor River	O	08	03	59 39 00N	136 44 00W	59.65	-136.733333333333	5939'N	13644'W	Stratabound gypsum	Gypsum, Anhydrite		Medium.  Reserves of 6.35 million tonnes grading 90% gypsum.	Unassigned	White, 1986; B.C. Minfile, 1988.	Consists three stratabound gypsum layers that occur in deformed Permian to Triassic limestone, limestone breccia, and black calcareous argillite.  Reserves are  for the West and Kim zones.  An additional  reserve for East zone is 2.5 million tonnes grading 79% gypsum.  Deposit age interpreted as Permian-Triassic.	Canada

O08-04	Adanac-Adera (Ruby Creek)	O	08	04	59 42 36N	133 24 12W	59.71	-133.403333333333	5943'N	13324'W	Porphyry Mo	Mo, W	U, Sn, Cu	Medium.  Reserves of 182.3 million tonnes grading 0.059% MoS2.	Surprise Lake	Christopher and Pinsent, 1982; B.C. Minfile, 1988; EMR Canada, 1989; Dawson and others, 1991; Mining Review, 1992.	Consists of molybdenite with accessory pyrite, fluorite, chalcopyrite, scheelite and wolframite with minor arsenopyrite that occur in a quartz-vein stockwork. Hosted by a quartz monzonite stock associated with the Late Cretaceous Surprise Lake Batholith.  Siliciic and potassic alteration occur as envelopes up to several centimeters thick around quartz veins.  Minor uranium occurs in the deposit. K-Ar age of 70.6  3.8 Ma for Surprise Lake Batholith.  Associated W-, Cu-, Sn-greisen veins and W-, Sn- (Cu, Pb, Zn) skarns occur along stock contacts with limestone of Cache Creek Assemblage.  Deposit age interpreted as Late Cretaceous.	Canada

O08-05	Klukwan	O	08	05	59 25 42N	135 53 00W	59.4283333333333	-135.883333333333	5926'N	13553'W	Zoned mafic-ultramafic Fe-Ti	Fe, PGE, Ti, V		Large. Estimated 12 billion tonnes grading 13% magnetite, 1.5 to 4.4% TiO2, and 0.2% V2O5. Reserves of 45 million tonnes grading 10.3 g/t Au, 0.1% Cu, 1.0 g/t Pt and 1.0 g/t Pd. 	Klukwan-Duke	Wells and Thorne, 1953; Robertson, 1956; MacKevett and others, 1974; Wells and others, 1986; Brew and others, 1991; Berg, 1984; Wells and others, 1986.	Consists of titaniferous magnetite with minor chalcopyrite, hematite, pyrite, pyrrhotite, spinel, and leucoxene that occur either as disseminations or in tabular zones in a pyroxenite body surrounded by diorite.  Magnetite occurs interstitial to pyroxene and is idiomorphic against hornblende.  Cretaceous pyroxenite and diorite intrude Triassic or older rocks. Best known part of the deposit is nearby Klukwan fan (Takshanuk Mountain) magnetite placer deposit that contains estimated 453 million tonnes grading 10% titaniferous magnetite.  Placer deposit occurs in an alluvial fan at the foot of the mountain slope along a road below Klukwan lode deposit. 	Canada

O08-06	Haines	O	08	06	59 14 30N	135 30 00W	59.2416666666667	-135.5	5915'N	13530'W	Zoned mafic-ultramafic Fe-Ti	Fe, Ti		Large.  Reserves of greater than 1 billion tonnes grading less than 10% magnetite, 1.3% to 1.8% TiO2.	Klukwan-Duke	 Wells and others, 1986; Brew and others, 1991.	Consists of titanium-bearing magnetite that occurs as primary magmatic segregations in pyroxenite that forms part of zoned complex of the Union Bay Suite. Complex contains a pyroxenite core that surrounded by epidote-bearing granite, and intrudes metabasalt of the Taku Terrane.  Deposit age interpreted as mid-Cretaceous. 	Canada

O08-07	Orange Point	O	08	07	58 55 18N	136 59 54W	58.9216666666667	-136.998333333333	5855'N	13660'W	Kuroko Zn-Pb-Cu massive sulfide	Zn, Cu	Ba,Pb,Ag,Au	Medium.  Reserves of greater than 1 million tonnes grading 19% Zn, 5.2% Cu, 3.5 g/t Au, 70 g/t Ag.	Alexander	Berg, 1984; Brew and others, 1991.	Consists of pyrite, pyrrhotite, sphalerite and chalcopyrite that occur as elongated zones of massive and disseminated sulfides up to 25 meters wide and 170 meters long. Deposit hosted in Permian and (or) Triassic meta-andesite flows and tuffs.  Deposit age interpreted as Permian and Triassic.	Canada

O08-08	Kensington	O	08	08	58 52 00N	135 05 00W	58.8666666666667	-135.083333333333	5852'N	13505'W	Au quartz vein	Au	Ag, Pb	Produced 10,900 tonnes grading about 5.8 g/t Au.  Proven and probable reserves are 7.6 million tonnes grading 5.2 g/t Au	Juneau	Wright and Wright, 1908; Knopf, 1911; Eakins, 1918; Goldfarb and others, 1988, 1991; Harvey and Kirkham, 1991	Stockworks of quartz veins in high-angle zones of sheared and chloritized Cretaceous quartz diorite.  Veins contain mainly pyrite with some chalcopyrite and rare galena.  Pyrite varies from disseminated euhedral crystals to massive veins up to 0.1 m wide.  Alteration varies with intensity of veining, and is marked by chlorite, epidote, sericite, and locally K-feldspar.  Gangue dominantly quartz with lesser amounts of carbonate and albite.  Veins are irregular and vary from 2 to 10 cm wide.  Veins generally parallel stockwork boundaries.  Vein system trends generally north-south with an areal extent of 24 by 48 m and a vertical extent of 300 m.  The deposit occurs in Cretaceous diorite that intrudes Upper Triassic greenstone, graywacke, and argillite of the western border of the informally named, Coast plutonic-metamorphic complex of Brew and Ford (1984).  Origin of gold interpreted to be from deep-crustal metamorphic fluids.  Mined from 1886 to 1924.  About 1,800 m of workings.  	Alaska

O08-08	Jualin	O	08	08	58 52 00N	135 05 00W	58.8666666666667	-135.083333333333	5852'N	13505'W	Au quartz vein	Au	Ag, Cu, Pb	Medium. Reserves of 907,000 tonnes grading 10.5 g/t Au.  Produced about 1.5 million g Au	Juneau	Knopf, 1911; Jones and others, 1984a; Barnett, 1989; Bundtzen and others, 1990; Goldfarb and others, 1991; Brew and others, 1991; Swainbank and others, 1991.	Consists of four or five major quartz fissure veins and pipe-like stockworks that contain minor gold, and considerable pyrite, chalcopyrite, galena, minor sphalerite, and secondary copper minerals. Deposit hosted in Cretaceous quartz diorite.  Pyrite is dominant sulfide.  Gold associated with pyrite as minute blebs in goethite rims and fracture fillings in corroded crystals.  Gangue of quartz with lesser ankerite, chlorite, and sericite. Age of mineralization is interpreted as 55 Ma. Quartz diorite adjacent to veins exhibit proximal ankerite, quartz, and sericite alteration, and more widespread propylitic alteration.  Quartz diorite intrudes Upper Triassic greenstone, graywacke, and argillite of Alexander terrane.  More than 5,500 m of horizontal workings.  Origin of gold interpreted to be from deep-crustal metamorphic fluids.  Principal mining from 1895 to 1920.	Canada

O08-09	Tulsequah Chief (Big Bull)	O	08	09	58 44 18N	133 34 30W	58.7383333333333	-133.575	5844'N	13335'W	Kuroko Zn-Cu-Pb massive sulfide	Zn, Cu, Au, Ag, Pb		Medium.  Reserves of 8.8 million tonnes grading 1.21% Pb.  Grade: 6.42% Zn,1.3% Cu, 2.51 g/t  Au, 106.36 g/t  Ag.	Coast	B.C. Minfile, 1989; EMR Canada, 1989; Dawson and others, 1991; Redfern Resources Ltd., summary report,1995.	Consists of massive to disseminated pyrite, sphalerite, chalcopyrite and galena with tennantite and tetrahedrite that are hosted in mafic volcanic rocks of the Upper Devonian to early Mississippian Mount Eaton series.  Hanging wall  composed of dacite tuffs; footwall composed of more massive andesitic flows.  Alteration associated with mineralization consists of sericite-pyrite with local anastomosing quartz veins grading to pervasive silicification.  Deposit contains lenses of massive sulfides up to 10 meters thick and 170 meters long.  Seven conformable lenses are identified.  Deformation of the lenses is intense, with at least 3 phases of deformation.  Production from 1951 and 1957 was 574,000 tonnes grading 1.8% Cu, 1.3% Pb, 6.7% Zn, 3.4 g/t Au and 110 g/t Ag.  Deposit age interpreted as Devonian and Mississippian. 	Canada

O08-10	Erikson-Ashby	O	08	10	58 39 30N	133 28 24W	58.6583333333333	-133.473333333333	5840'N	13328'W	Kuroko Zn-Pb-Ag massive sulfide and Zn Skarn	Ag, Pb, Zn, Au		Medium.  Reserves of 907,190 tonnes grading 215 g/t Ag, 2.3% Pb, 3.8% Zn, 1.7g/t Au.	Unassigned	B.C. Minfile, 1988; EMR Canada, 1989.	Volcanogenic massive sulfides occur in Upper Cretaceous to Lower Eocene rhyolitic volcanics and associated volcaniclastic sediments and Mn-rich skarn replacement bodies in Permian (?) limestone and Paleozoic to Triassic chert, greywacke and intercalated intermediate volcanics and phyllites.  Rhyolite-hosted part of deposit generally consists of lenses of pyrite and magnetite overlain by massive pyrite, sphalerite and galena.  Galena and magnetite are concentrated upward in massive sulfide sections.  Skarns occur as veins and replacement bodies with associated rhodochrosite and magnetite.  Deposit age interpreted as Late Cretaceous-E. Tertiary.	Canada

O08-11	Sutlahine River Area (Thorn, Kay)	O	08	11	58 32 12N	132 47 18W	58.5366666666667	-132.788333333333	5832'N	13247'W	Porphyry Cu-Mo	Cu, Mo, Ag	Pb	Medium. 	Surprise Lake	B.C. Minfile, 1988.	Consists of brecciated rhyolite contains chalcopyrite, pyrite, quartz, minor galena, barite, calcite and siderite.  Chalcopyrite and molybdenite occur as disseminations and fracture fillings with quartz and orthoclase.  Minor enargite, tetrahedrite, pyrite and stilbite occur in quartz veins in shear zones and in breccias.  Deposit hosted in a silicic intrusive-extrusive complex of Tertiary Sloko Group, cored by a quartz feldspar porphyry intrudes the contact between pre-Upper Triassic metasedimentary rocks, and volcanic rocks, including porphyritic andesite, rhyolite and tuff of the Upper Triassic Stuhini Group.  Complex is extensively altered to pyrite, hydrothermally altered. Deposit age interpreted as Early Tertiary.	Canada

O08-12	Mount Ogden (Nan, Moly-Taku)	O	08	12	58 26 18N	133 21 30W	58.4383333333333	-133.358333333333	5826'N	13322'W	Porphyry Mo	Mo	Zn, Cu, Ag, W	Large.  Reserves of 218 million tonnes grading 0.30% MoS2.	Surprise Lake	Mining Review, 1981; B.C. Minfile, 1988; EMR Canada, 1989.	Consists of molybdenite hosted by an alaskite-quartz monzonite stock of the Coast Plutonic Complex (Cretaceous and early Tertiary), that intrudes amphibolite-grade, metamorphosed  Permian and Triassic limestones, clastic sedimentary and volcanic rocks.  Country rocks locally contain skarn that contains disseminated pyrite, pyrrhotite, magnetite and traces of sphalerite and scheelite, and a white calc-silicate hornfels with calcite, and wollastonite or tremolite.  Molybdenite occurs mainly in the alaskite as platy crystals in veins, in veinlets, as rosettes in vuggy quartz and as interstitial grains.  Some molybdenite veins range up to 10 cm wide and occur over 30 meters.  Alteration consists of quartz-sericite, with fluorite, biotite, minor pyrite and sphalerite.  Deposit age interpreted as Late Cretaceous and early Tertiary.	Canada

O08-13	Alaska-Juneau	O	08	13	58 17 42N	134 20 24W	58.295	-134.34	5818'N	13420'W	Au quartz vein	Au	Pb, Ag	Medium. Produced 108 million g Au, 59.1 million g Ag, and 21.8 million kg Pb from 80.3 million tonnes ore.  Reserves of 61.6 million tonnes grading 1.8 g/t Au	Juneau	Spencer, 1906; Twenhofel, 1952; Wayland, 1960; Herreid, 1962; Goldfarb and others, 1986, 1988, 1991; Newberry and Brew, 1987, 1988; Light and others, 1989; Brew and others, 1991; Alaska Mineral Industry, 1993, p.13.	Consists of a network of lenticular quartz veins a few centimeters to 1 m thick contain sparse scattered masses of gold, pyrite, pyrrhotite, arsenopyrite, galena, with minor sphalerite, chalcopyrite, and silver.  Vein lode system about 5.6 km long and 600 m wide.  Deposit consists of a series of parallel quartz stringers in phyllite and schist near the contact between the Upper Triassic Perseverance Slate, in amphibolite derived from late(?) Mesozoic gabbro dikes and sills, and in the informally named Gastineau volcanics of Permian and (or) Upper Triassic age.  Deposit is in the western metamorphic belt of the informally named Coast plutonic-metamorphic complex of Brew and Ford (1984).  Most of ore occurs in quartz veins; some in adjacent altered metamorphic rocks.  Metagabbro forms irregular dikes and sills.  Large-volume, low-grade mine.  A few hundred kilometers of underground workings and several large glory holes.  Production from about 1893 to 1944.  Origin of gold interpreted to be from deep-crustal metamorphic fluids, or possibly a remobilized strata-bound deposit.	Canada

O08-14	Bohemia Basin (Yakobi Island)	O	08	14	57 58 30N	136 25 18W	57.975	-136.421666666667	5759'N	13625'W	Gabbroic Ni-Cu	Ni, Cu		Medium. Estimated 19 million tonnes grading 0.33% Ni, 0.21% Cu, 0.01% Co	Yakobi	Kennedy and Walton, 1946; Johnson and others, 1982; Himmelberg and others, 1987, Still, 1988; Brew and others, 1991; Berg, 1984.	Consists of magmatic segregations, chiefly of pyrrhotite, pentlandite, and chalcopyrite.  Occur in trough-like body about 45 m thick near base of basin-shaped, composite norite La Perouse lopolith of Tertiary age.  Norite locally grades into gabbro and diorite.  Norite stock intrudes metagraywacke, phyllite, and greenschist of the Cretaceous and Cretaceous(?) Kelp Bay Group.  Considerable drilling exploration during late 1970's to early 1980's. 	Canada

O08-15	Greens Creek 	O	08	15	58 04 42N	134 37 30W	58.0783333333333	-134.625	5805'N	13438'W	Kuroko Zn-Pb-Cu massive sulfide	Ag, Zn, Au, Pb	Cu,Bi,Sb	Medium.  Reserves of 12.5 million tonnes grading 456 g/t Ag, 4.1 g/t Au, 12.8 % Zn, and 4.0 % Pb.	Alexander	Dunbier and others, 1979; Drechsler and Dunbier, 1981; J. Dunbier and D. Sherkenbach, written commun., 1984; Henry C. Berg, written commun., 1984; Newberry, Brew, and Crawford, 1990; Brew and others, 1991; Wells and others, 1986; Berg, 1984.	Consists of sphalerite, galena, chalcopyrite, and tetrahedrite in a pyrite-rich matrix in massive pods, bands, laminations, and disseminations, associated with pyrite-carbonate-chert exhalite.  Hanging wall of chlorite and sericite sedimentary rocks.  Footwall of black graphitic argillite.  "Black ore" forms an extensive blanket deposit, and is composed of fine-grained pyrite, sphalerite, galena, and Ag-rich sulfosalts in laminations in black carbonaceous exhalite and argillite; "white ore" occurs along edges of massive pods, and is composed of minor tetrahedrite, pyrite, galena, and sphalerite in laminations, stringers, or disseminations in massive chert, carbonate rocks, or sulfate-rich exhalite.  Local veins with bornite, chalcopyrite, and gold below massive sulfides.  Veins may be brine conduits.  Sulfides and host rocks underlain by serpentinized mafic volcanic flows and tuffs.  Host rocks form Triassic suite of metasedimentary and metavolcanic rocks in Alexander terrane and apparently overlain structurally several kilometers away by fossiliferous Permian black carbonaceous metasedimentary rocks.  Host rocks tightly folded into southeast-plunging, overturned antiform.  Interpreted to be an exhalative marine massive sulfide deposit formed in a Triassic back-arc or wrench fault extensional basin during deposition of arc- or continent-derived clastic and volcaniclastic sediments intermixed with mafic flows and tuffs.	Canada

O08-16	Chichigof, Hirst-Chichagof	O	08	16	57 39 48N	136 05 48W	57.6633333333333	-136.096666666667	5740'N	13606'W	Au quartz vein	Au	Ag	Medium. Produced about 24.6 million g Au, 1.24 million g Ag, and minor Pb and Cu from 700,000 tonnes of ore.  Average grade of 7.2 g/t Au, 2.0 g/t Ag. Reserves of 91,000 tonnes grading 41.2 g/t Au in several ore bodies	Baranof 	Reed and Coats, 1941; Still and Weir, 1981; Johnson and others, 1982;  Berg, 1984; Bundtzen, Green, Deager, and Daniels, 1987; Brew and others, 1991.	Consists of tabular to lenticular quartz veins a few meters thick, extend a few hundred meters along strike, and up to a few thousand meters along plunge.  Mainly ribbon quartz with minor pyrite, arsenopyrite, galena, sphalerite, chalcopyrite, and some scheelite and tetrahedrite locally.  Ore shoots localized within shear and gouge zones in Hirst and Chichagof faults, especially along undulations in the fault planes.  Veins cut metagraywacke and argillite of the Cretaceous Sitka Graywacke.  Production from about 1905 to 1940.  Extensive underground workings on 12 levels to 1,200 m deep and 1,440 m long.  Considerable drilling and exploration in the 1980's.	Canada

O08-17	Castle Island, Kupreanof Island	O	08	17	56 39 12N	133 09 42W	56.6533333333333	-133.161666666667	5639'N	13310'W	Bedded barite, kuroko Ba-Zn-Pb-Cu massive sulfide	Ba	Zn, Pb, Ag, Cu	Medium. Produced 680,000 tonnes ore grading 90% barite. Sulfide-rich layers contain up to 5% galena and sphalerite, and 100 g/t Ag.	Alexander	Berg and Grybeck, 1980; Berg, 1984; Grybeck and others, 1984; Brew and others, 1991.	Castle Island: Consists of lenses of massive barite interlayered with metamorphosed Devonian or Triassic limestone, calcareous and tuffaceous clastic rocks.  Sulfide-rich interbeds contain sphalerite, galena, pyrite, pyrrhotite, bornite, tetrahedrite, and chalcopyrite.  Mined by surface and underwater stripping.  Kupreanof Island Deposit:  Consists of lenses of massive pyrite and lesser galena and sphalerite in Upper Triassic metamorphosed felsic volcanic and volcaniclastic rocks, chert, slate, and marble.  Sulfide lenses up to 30 m long and 3 m wide.  Complexly folded and faulted.	Canada

O08-18	Polaris-Taku (Whitewater)	O	08	18	58 42 00N	133 38 00W	58.7	-133.633333333333	5842'N	13338'W	Au quartz vein	Au, Ag, Cu, As, Sb		Medium.  Resource of 2.196 million tonnes grading 14.74 g/t Au.	Texas Creek	B.C. Minfile, 1983; Marriott, 1992; Mihalynuk and Marriott, 1992.	Consists of native gold associated with arsenopyrite and stibnite in quartz-ankerite veins. Deposit underlain by late Paleozoic to Triass Stuhini Group volcanic and sedimentary rocks.  Volcanic rocks composed of andesite and basalt flows and pyroclastic rocks host gold in that occurs in an assemblage of arsenopyrite, ankerite, sericite, pyrite, fuchsite, and stibnite.  Structures hosting deposit are splays of the Tulsequah River shear zone. Production of 231,000 oz Au from 760,000 tons of ore, with a recovered grade of 0.30 oz Au/t.  Deposit age iinterpreted as Early Jurassic(?). 	Canada

O08-19	Muddy Lake (Golden Bear, Totem)	O	08	19	58 12 42N	132 17 18W	58.2116666666667	-132.288333333333	5813'N	13217'W	Au quartz vein	Au	Ag	Medium.  Reserves of 720,000 tonnes grading 5.75  g/t Au.	Texas Creek	Schroeter, 1987; Northern Miner, August 31,1987; Melis and Clifford, 1987; Osatenko and Britton, 1987; Dawson and others, 1991; North American Metals Corp, news release, February 1995.	Consists of disseminations and fracture-fillings of extremely fine-grained pyrite that occur along fault contacts of tuffite and limestone.  Deposit interpreted as a mesothermal Au-quartz veins  hosted by silicified limestone, dolostone and tuff of the Permian Asitka Assemblage. Occurs in a north-trending, 20 km long fault zone. Production started in 1983. Four deposits occur on the property: Bear, Fleece, Totem and Kodiak zones.  Deposit age interpreted as Early Jurassic. 	Canada

O08-20	Glacier Creek	O	08	20	59 24 00N	136 23 00W	59.4	-136.383333333333	5924'N	13623'W	Kuroko massive sulfide	Ba, Cu, Zn	Pb, Ag, Au	At least 680,000 tonnes of 45% barite and up to 3% combined Cu and Zn	Alexander	MacKevett and others, 1971; Hawley, 1976; Still, 1984; Still and others, 1991	Fine-grained sphalerite, galena, chalcopyrite as disseminations, and in massive layers and lenses associated with metamorphosed Paleozoic and lower Mesozoic mafic pillow flows, highly altered and metamorphosed quartz-feldspar porphyry, thin phyllitic siltstone and limestone.  Sparse disseminated pyrite, magnetite, and tetrahedrite.  Main sulfide layers and lenses associated with lenses of sericite-talc-quartz schist as much as 180 m thick in the metamorphosed mafic volcanic rocks.  Schist formed partly by alteration of mafic extrusive rocks, and partly from quartz-feldspar porphyry.  Deposits up to 9 m thick and 600 m long.  Sulfide layers and lenses interfoliated with beds of nearly pure barite up to 20 m thick.  Sedimentary origin indicated by conformable relations between sulfide layers and bedding.  Host rocks part of Alexander terrane; age of host rocks uncertain.	Alaska

O08-21	Margerie Glacier	O	08	21	59 01 00N	137 05 00W	59.0166666666667	-137.083333333333	5901'N	13705'W	Porphyry Cu and lesser polymetallic vein	Cu, Ag, Au		Estimated 145 million tonnes of 0.02% Cu, 0.27 g/t Au, 4.5 g/t Ag	Central-Southeastern Alaska	Brew and others, 1978	Chalcopyrite, pyrite, arsenopyrite, sphalerite, molybdenite, and minor scheelite in quartz veins in shear zones, masses of sulfide, and as disseminations in propylitically altered, Cretaceous or Tertiary porphyritic granite stock and in adjacent hornfels.  Granite intrudes Permian(?) metamorphosed pelitic and volcanic rocks, and sparse marble of Alexander terrane.  	Alaska

O08-22	Reid Inlet	O	08	22	58 52 00N	136 52 00W	58.8666666666667	-136.866666666667	5852'N	13652'W	Au quartz vein	Au, Pb		Produced 220,000 to 250,000 g Au	Baranof	MacKevett and others, 1971; Brew and others, 1978	Zone of narrow, discontinuous, steeply dipping quartz veins up to a few hundred meters long and up to 1.1 m thick in altered Cretaceous granodiorite, contact-metamorphosed Permian(?) pelitic and volcanic rocks, and sparse marble of Alexander terrane.  Veins trend north-south, northeast, and east-west.	Alaska

O08-23	Brady Glacier	O	08	23	58 33 00N	136 56 00W	58.55	-136.933333333333	5833'N	13656'W	Gabbroic Ni-Cu	Cu, Ni, PGE		Estimated 82 to 91 million tonnes of 0.53% Ni, 0.33% Cu, 0.03% Co, minor PGE.  Grab samples of 0.18 to 1.30 g/t PGE	Yakobi	Brew and others, 1978; Czamanske and Calk, 1981; Himmelberg and Loney, 1981	Disseminated and lenses of pyrrhotite, pentlandite, and chalcopyrite, with rare pyrite near base of large layered Tertiary lopolith consisting mainly of gabbro with sparse peridotite, all part of the La Perouse layered gabbro.  Locally up to 10% disseminated sulfides.  Deposit almost entirely beneath Brady Glacier, but exposed in small nunataks.  Gabbro intrudes metagraywacke and phyllite of the Cretaceous Sitka Graywacke.  Considerable drilling and exploration in 1970's, but now in National Park. Exploration stopped short of development.  	Alaska

O08-24	Apex and El Nido	O	08	24	57 57 00N	136 16 00W	57.95	-136.266666666667	5757'N	13616'W	Au quartz vein	Au, Ag	Cu, Pb, W, Zn	Produced about 622,000 g Au and 93,300 g Ag	Baranof	Reed and Coats, 1941; Still and Weir, 1981; Johnson and others, 1982	Quartz fissure veins up to 2 m thick and stockworks with sparse pyrite, arsenopyrite, chalcopyrite, galena, sphalerite, tetrahedrite, and gold.   Host rocks are altered Mesozoic diorite pluton and amphibolite mass within pluton.  Minor sulfides in the altered diorite wall rocks.  Deposit also contains disseminations, veinlets, and small masses of scheelite. Vein system symmetrical around vertical fault that bisects deposit.  Pluton intrudes upper Paleozoic low-grade pelitic and intermediate volcanic rocks.  About 1.6 km of workings.  Production from 1912 to 1939.	Alaska

O08-25	Cobol	O	08	25	57 51 00N	136 13 00W	57.85	-136.216666666667	5751'N	13613'W	Au quartz vein	Au	Cu, Pb, Zn	Produced about 3,100 g Au from about 120 tonnes ore	Baranof	Reed and Coats, 1941; Johnson and others, 1982	Quartz fissure vein up to 0.6 m wide with arsenopyrite, sphalerite, galena, pyrite, and chalcopyrite cuts Cretaceous(?) quartz diorite, and upper Paleozoic greenstone, quartzite, and siliceous limestone.  Quartz diorite locally altered near veins.	Alaska

O08-26	Mirror Harbor	O	08	26	57 47 00N	136 19 00W	57.7833333333333	-136.316666666667	5747'N	13619'W	Gabbroic Ni-Cu	Ni, Cu	Co	Largest ore body contains about 7,300 tonnes with about 1.57% Ni, 0.88% Cu, and 0.04% Co	Yakobi	Pecora, 1942; Kennedy and Walton, 1946; Johnson and others, 1982	Disseminated, intergrown pyrrhotite, pentlandite, and chalcopyrite in composite Tertiary norite stock.  Sulfide pods locally.  Stock intrudes contact-metamorphosed metagraywacke and phyllite of the Cretaceous Sitka Graywacke.	Alaska

O08-27	Treadwell	O	08	27	58 15 00N	134 21 00W	58.25	-134.35	5815'N	13421'W	Au quartz vein	Au, Ag, Cu		Produced about 90.1 million g Au from 25 million tonnes ore	Juneau	Spencer, 1905; Buddington and Chapin, 1929; Light and others, 1989; Goldfarb and others, 1991	Large deposit with disseminated sulfides and quartz and quartz-calcite vein systems that contain sparse gold, pyrite, magnetite, molybdenite, chalcopyrite, galena, sphalerite, and tetrahedrite in shattered albite diorite dikes and sills.  These intrude Jurassic(?) and Lower Cretaceous(?) slate and greenstone derived from basaltic tuff or agglomerate; part of the Treadwell Slate in the Gravina-Nutzotin belt.  Some ore in zone at least 1,100 m long in slate inclusions and in adjacent wall rock.  Best ore associated with abundant quartz and calcite veinlets.  Deposit mined from above sea level to 790 m beneath Gastineau Channel.  Four major mines connected underground.  Principal mining from 1885 to 1922 when most workings flooded during a catastrophic influx of sea water.  Origin of gold interpreted to be deep-crustal metamorphic fluids.	Alaska

O08-28	Sweetheart Ridge	O	08	28	57 55 00N	133 37 00W	57.9166666666667	-133.616666666667	5755'N	13337'W	Kuroko massive sulfide	Ag, Au, Cu, Pb, Zn		Estimated 6,600 tonnes of 7.9 g/t Au, 10.6 g/t Ag, 0.7% Cu	Tracy	Brew and Grybeck, 1984; Kimball and others, 1984	Strata-bound sulfide disseminations and thin, layers of massive chalcopyrite, pyrite, subordinate sphalerite, and sparse galena occur in zones up to 2 m thick in cataclastic upper Paleozoic or Mesozoic quartz-rich paragneiss and to a lesser extent in schist.  Deposit occurs just west of the informally named Coast plutonic-metamorphic complex of Brew and Ford (1984).  Scattered sulfides in veins may represent remobilized portions of strata-bound deposit.	Alaska

O08-29	Sumdum	O	08	29	57 47 00N	133 28 00W	57.7833333333333	-133.466666666667	5747'N	13328'W	Kuroko massive sulfide(?)	Ag, Cu, Zn		Estimated 24 million tonnes grading 0.57% Cu, 0.37% Zn and 10.3 to 103 g/t Ag, assuming deposit continues beneath Sumdum Glacier.	Tracy	MacKevett and Blake, 1963; Brew and Grybeck, 1984; Kimball and others, 1984	Massive lenses and disseminated zones with pyrrhotite, pyrite, chalcopyrite, sphalerite, and lesser bornite, malachite, azurite, and galena in bodies up to 15 m wide.  Zones occur parallel to layering along crest and flanks of isoclinal fold in Paleozoic or Mesozoic metasedimentary schist and gneiss at the western edge of the informally named Coast plutonic-metamorphic complex of Brew and Ford (1984).  Sulfide-bearing veins(?) and fault breccia that may postdate strata-bound deposit and represent remobilization of the original mineralization.	Alaska

O08-30	Sumdum Chief	O	08	30	57 39 00N	133 27 00W	57.65	-133.45	5739'N	13327'W	Au quartz vein	Au, Ag, Cu, Pb, Zn		Produced about 750,000 g each of Ag and Au.  Average grade about 13.7 g/t Au	Juneau	Spencer, 1906; Brew and Grybeck, 1984; Kimball and others, 1984; Goldfarb and others, 1988, 1991	Two quartz-calcite fissure veins with gold, auriferous pyrite, galena, sphalerite, chalcopyrite, and arsenopyrite.  Uneven gold distribution, mainly in pockets where small veins intersect main veins.  Veins, up to 6 m thick, occur in upper Paleozoic(?) or Mesozoic graphitic slate and marble of the informally named Coast plutonic-metamorphic complex of Brew and Ford (1984).  Minimum of 1,820 m horizontal workings.  Moderate former production.  Origin of gold interpreted to be deep-crustal metamorphic fluids.	Alaska

O08-31	Groundhog Basin	O	08	31	56 31 00N	132 04 00W	56.5166666666667	-132.066666666667	5631'N	13204'W	Polymetallic vein(?), Sn granite, Porphyry Mo	Ag, Pb, Zn		Estimated several hundred thousand tonnes massive sulfide ore grading 8% Zn, 1.5% Pb, 51.5 g/t Ag.  Equal amounts of disseminated sulfide ore grading 2.5% Zn and 1% Pb.	Central-Southeastern Alaska	Buddington, 1923; Gault and others, 1953; Grybeck and others, 1984; Newberry and Brew, 1988	Disseminated to massive pyrrhotite, sphalerite, and galena with lesser pyrite, arsenopyrite, chalcopyrite, cassiterite,and magnetite.  Sulfides occur in several tabular or stratiform zones up to 1 m thick and in veins adjacent to altered Miocene granite porphyry.  Zones and veins occur in upper Paleozoic or Mesozoic calc-silicate, quartz-feldspar, and hornblende-rich gneiss and schist of the informally named Coast plutonic-metamorphic complex of Brew and Ford (1984).  Deposits and host rocks intruded by granite porphyry and by younger quartz porphyry sills and dikes.  Deposit interpreted as skarn and polymetallic vein deposit related to tin granite. Altered granite porphyry may contain 1 million tonnes of undiscovered resources containing 0.8% Sn.	Alaska

O08-32	Funter Bay	O	08	32	58 14 00N	134 52 00W	58.2333333333333	-134.866666666667	5814'N	13452'W	Gabbroic Ni-Cu	Cu, Ni, Co		Estimated 450 to 540 thousand tonnes with 0.33 to 1% each of Cu and Ni, and 0.05 to 0.32% Co	Klukwan-Duke	Barker, 1963b; Noel, 1966	Disseminated pyrrhotite, pentlandite, and chalcopyrite in Mesozoic olivine-hornblende gabbro at base of Late(?) Mesozoic gabbro-norite pipe.  Remainder of pipe contains much less sulfide.  Pipe intrudes upper Paleozoic or Triassic quartz-mica schist of Alexander terrane. 	Alaska

O09-01	Midway (Silver Tip)	O	09	01	59 55 36N	130 20 24W	59.9266666666667	-130.34	5956'N	13020'W	Pb-Zn-Ag  skarn and manto	Ag, Pb, Zn	Au, Sb, Bi	Medium.  Reserves of 1.18 million tonnes grading 9.6% Zn, 7.0% Pb, 410 g/t Ag.	Cassiar	B.C. Minfile, 1988; Bradford and Godwin, 1988; EMR Canada, 1989.	Consists of sphalerite, galena and pyrite with minor silver, gold, antimony and bismuth minerals occur as irregular, pipe-like, open-space filling and replacement bodies. Deposit hosted by Middle Devonian McDame Group carbonates beneath a major unconformity.  SEDEX Ba, Pb, and Zn deposits occur in the overlying Devonian and Mississippian Earn Group turbiditic clastic rocks. K-Ar age of 66 Ma for sericitized Earn Group sedimentary rock near quartz- feldspar porphyry dikes, about 2 km from the deposit, interpreted as age of mineralization.  Deposit age interpreted as Late Cretaceous. 	Canada

O09-02	Leguil Creek (Letain)	O	09	02	59 46 18N	127 12 24W	59.7716666666667	-127.206666666667	5946'N	12712'W	Bedded barite	Ba		Medium.  Production of about 10,000 tonnes (1987-88).  Grade not available.	Liard 	B.C. Minfile, 1990.	Consists of veins and lenses of barite that occur in a thinly bedded sequence of Lower Paleozoic shale and siltstone of Cambrian and Devonian age. Sequence gently folded into a series of northwest-trending anticlines and synclines.  Three zones are identified.  The main zone occurs in a braided fault zone, rarely exceeding 3.5 m thickness, and is intruded by a diorite dike.  Veins in the other two zones vary from 1 to 4 meter wide, trend northeast, and are vertical.  Deposit age interpreted as Devonian(?). 	Canada

O09-03	Lower Liard (Gem, Tee, Tam)	O	09	03	59 26 54N	126 05 06W	59.4483333333333	-126.085	5927'N	12605'W	Southeast Missouri Ba-F	F, Ba		Medium.  Reserves of 2.4 million tonnes grading 34-73% CaF2.	Liard 	BCGS, 1972; B.C. Minfile, 1988; EMR Canada, 1989.	Consists of fluorite with barite, witherite, barytocalcite, quartz and calcite that occur along contact between limestone of the Middle Devonian Dunedin Formation and shale of the overlying Middle to Upper Devonian Besa River Formation.  Fluorite occurs in limestone, as veins and pods, and in brecciated shale.  Deposit age interpreted as Mississippian, based on fission track dating. 	Canada

O09-04	Windy (Balsam, Star, Kuhn, Dead Goat)	O	09	04	59 21 06N	129 51 48W	59.3516666666667	-129.863333333333	5921'N	12952'W	W skarn	W, Mo	Zn, Cu	Medium. Reserves of 616,500 tonnes grading 0.48% WO3, 0.13 MoS2.	Surprise Lake	Cooke and Godwin, 1985; B.C. Minfile, 1988.	Consists of scheelite, molybdenite, pyrite, pyrrhotite and rare magnetite form coarse disseminations interstitial to calc-silicates in massive skarn.  Locally, quartz-molybdenite veins crosscut skarns.  Retrograde massive pyrrhotite-sphalerite skarn replaces other skarn facies.  Skarn minerals include garnet, diopside, actinolite, powellite and fluorite.  Skarn occurs along the lower contacts of marble layers in the Lower Cambrian Atan and Late Proterozoic Ingenika Groups. Skarns occur adjacent to Late Cretaceous Needlepoint stocks of the Surprise Lake Suite with a K-Ar isotopic age of 72.4 Ma.  Deposit age interpreted as Late Cretaceous.	Canada

O09-05	Cassiar (Mount McDame)	O	09	05	59 19 30N	129 49 00W	59.325	-129.816666666667	5920'N	12949'W	Serpentine-hosted asbestos	Asbestos, jade		Large.  Pre-production reserves of 55 million tonnes with high quality chrysotile.	Cassiar Asbestos	Burgoyne, 1986; Leaming,1978; Northern Miner, December 12, 1987.	Consists of a chrysoltile asbestos stockwork hosted in serpentinized alpine ultramafic intrusive rocks that are emplaced at the contact of Slide Mountain terrane and overlying shelf sediments of Cassiar terrane. Area is underlain by four major thrust sheets.  Deposit composed of two-fibre vein type with magnetite in vein partings and in wall rocks.  Pyrite and jade also occur.  Production between 1953 and 1984 of 2.05 million tonnes of fibre.  Deposit age uncertain. 	Canada

O09-06	Mt. Haskin West (Joem, Rain, Moly Zone)	O	09	06	59 20 48N	129 30 42W	59.3466666666667	-129.511666666667	5921'N	12931'W	Porphyry Mo-W, Mo skarn	Mo, W		Medium.  Reserves of 11.76 million tonnes grading 0.17% MoS2.	Surprise Lake	B.C. Minfile, 1989; EMR Canada, 1989; Gower and others, 1985.	Consists of molybdenite and lesser scheelite in a quartz-muscovite stockwork in fine- and coarse-grained monzogranite and syenogranite of the Eocene Mt. Haskin Stock and scheelite-molybdenite skarn extend into adjacent dolomitic sediments.  K-Ar dating of the Mt. Haskin stock gives an age of 50.9 Ma  1.5 Ma.  Located on the northwestern flank of Mt. Haskin. Deposit age interpreted as middle Eocene.	Canada

O09-07	S.Q.E. (Storie, Casmo)	O	09	07	59 14 36N	129 52 18W	59.2433333333333	-129.871666666667	5915'N	12952'W	Porphyry Mo	Mo		Medium.  Reserves of 100.5 million tonnes grading 0.129% MoS2.	Surprise Lake	Panteleyev, 1979; Bloomer, 1981; Sinclair, 1986; EMR Canada, 1989; Dawson and others, 1991; Woodsworth and others, 1991.	Consists of pyrite and molybdenite that occur as fracture-fillings and rosettes in quartz feldspar porphyry dike-like phases of quartz monzonite of the Late Cretaceous Needlepoint Intrusions of the Surprise Lake plutonic suite. K-Ar isotopic age of 73.2 Ma  2.5 Ma for igneous rocks that form plugs or sheet-like dikes.  Deposit related to stockwork greisen and pegmatite.  Deposit age interpreted as Late Cretaceous.	Canada

O09-08	Eaglehead (Eagle)	O	09	08	58 29 42N	129 09 00W	58.495	-129.15	5830'N	12909'W	Porphyry Cu-Mo	Cu, Mo	Ag, Au	Medium.  Reserves of 30.0 million tonnes grading 0.41% Cu, 2.71 g/t Ag, 0.2 g/t Au, 0.0216% Mo.	Unassigned	Sinclair, 1986; EMR Canada, 1989;  B.C. Minfile, 1990; Mining Review, 1992.	Consists of chalcopyrite, bornite, molybdenite and pyrite that occur at the contact between Early Jurassic Eaglehead granodiorite of the Guichon Suite (K-Ar isotopic age of186 Ma)  and Upper Triassic volcanic and sedimentary rocks of the Kutcho Creek Formation.  Deposit hosted in granodiorite cut by feldspar porphyry dikes and is concentrated in steep, chlorite-rich shear zones.  Alteration is dominantly phyllic and propylitic, but chalcopyrite veins  exhibit potassium feldspar alternation.  Malachite, chalcocite, chrysocolla, tetrahedrite, cuprite and native copper also occur.  Deposit age interpereted as Early Jurassic.	Canada

O09-09	Gnat Lake Area (June, Stikine)	O	09	09	58 15 12N	129 49 30W	58.2533333333333	-129.825	5815'N	12950'W	Porphyry Cu	Cu	Au	Medium.  Reserves of 22.7 million tonnes grading 0.44% Cu, 0.31 g/t Au.	Galore Creek	Panteleyev, 1977; EMR Canada, 1989; B.C. Minfile, 1990; Woodsworth and others, 1991; Mining Review, 1992.	Consists of chalcopyrite and minor bornite that occur in andesitic greenstone and porphyritic andesite  of the Upper Triassic Stuhini Group. Sulfides occur as blebs, wisps, disseminations and fractures associated with, and proximal to quartz monzonite and granodiorite of the Middle to Late Jurassic Hotailuh Batholith, part of Three Sisters Suite.  Carbonate alteration is widespread, sericite and silica occur in patches, chlorite and tourmaline occur in veins.  All the rocks exhibit a cataclastic breccia texture.  Pyrite is rare, but magnetite concentrations are common with chalcopyrite.  Deposit age interpreted as Middle Jurassic.  	Canada

O09-10	Letain (Kutcho Creek)	O	09	10	58 20 00N	128 44 06W	58.3333333333333	-128.735	5820'N	12844'W	Serpentine-hosted asbestos	Asbestos		Medium.  Reserves of 15.7 million tonnes grading 4.7% asbestos fibre.	Unassigned	Leaming, 1978; Burgoyne, 1986; Northern Miner, December 12, 1987; B.C. Minfile, 1990.	Consists of chrysotile cross-fibre veins that occur in variably serpentinized alpine ultramafic rocks concordant with metasedimentary and metavolcanic rocks of the French Creek subterrane of Cache Creek terrane.  Deposit occurs in fracture-related veinlets in two prominent sets that strike northeast and northwest. Deposit age interpreted as Late Paleozoic(?). 	Canada

O09-11	Kutcho Creek (Sumac, Esso)	O	09	11	58 12 18N	128 21 30W	58.205	-128.358333333333	5812'N	12822'W	Kuroko Zn-Pb-Cu massive sulfide	Cu, Zn, Pb		Medium.  Reserves of 28.5 million tonnes grading 1.42% Cu, 1.92% Zn, 35 g/t Ag, 0.37 g/t Au.	Unassigned	Bridge and others, 1986; Thorstad and Gabrielse, 1986; B.C. Minfile, 1987; EMR Canada, 1989; Dawson and others, 1991; Mining Review, 1992.	Consists of stratabound, dispersed and massive pyrite, chalcopyrite, sphalerite and bornite that occur in sedimentary and epiclastic calc-alkaline volcanic rocks of the Upper Triassic Kutcho Creek Formation, near the top of a volcaniclastic pile which overlies Cache Creek tholeiite.  Ore zone footwall is a distinctive quartz-eye crystal tuff, often strongly foliated.  Alteration extends 75 meters below the ore zone, and coarse-grained euhedral pyrite occurs in a zone 10 to 20 m above the ore.  Deposit occurs in three lenses, separated by thin argillaceous horizons.  Each lens is zoned from copper-rich at the bottom to zinc-rich at the top.  Reserves include the easternmost Kutcho deposit (17 million tonnes), the central Sumac West deposit (10 million tonnes) and the westernmost Esso West deposit (1.0-1.5 million tonnes).  Deposit age interpreted as Late Triassic.	Canada

O09-12	Red Chris (Money)	O	09	12	57 42 06N	129 47 54W	57.7016666666667	-129.798333333333	5742'N	12948'W	Porphyry Cu-Au	Cu, Au, (Zn, Pb, Mo)		Large.  Reserves of 320 million tonnes grading 0.38% Cu, 0.30 g/t Au.	Galore Creek	B.C Minfile, 1989; EMR Canada, 1989; American Bullion Minerals Ltd., news release, Jan. 1995.	Consists of pyrite, chalcopyrite and rare bornite with trace molybdenite, galena and sphalerite that occur as stockworks and sheeted veins in the elongate 5 km-long porphyritic monzodiorite Red stock.  The Early Jurassic monzodiorite intrudes Late Triassic alkaline volcanic and volcaniclastic rocks.  An early stage of orthoclase-albite-biotite alteration, with varying quartz-sericite was followed by pervasive quartz-ankerite-sericite-pyrite alteration.  Pyrite occurs as a halo to the deposit that is genetically related to east-northeast subvertical faults.  Deposit age interpreted as Early Jurassic.	Canada

O09-13	Schaft Creek (Liard Copper)	O	09	13	57 21 54N	130 56 18W	57.365	-130.938333333333	5722'N	13056'W	Porphyry Cu-Mo	Cu, Mo		Large.  Reserves of 910 million tonnes grading 0.3% Cu, 0.025% MoS2, 0.14 g/t Au.	Texas Creek	Fox and others, 1976; B.C. Minfile, 1988; EMR Canada, 1989.	Consists of bornite, chalcopyrite and molybdenite that in fractures, veinlets and disseminations in hydrothermally altered Triassic andesite associated with diorite and granodiorite of the Late Triassic Hickman Batholith. Granitic rocks contain only 10% of the mineralization.  Quartz vein stockwork with biotite and potassium feldspar occur in a low grade core. K-Ar biotite age of 1825 Ma.  Most of deposit occurs in the intermediate zone with chlorite-sericite alteration.  Epidote occurs appears near boundaries of the main deposit.  Gold grade ranges from 0.11 to 0.32 g/t.  Deposit age interpreted as Late Triassic. 	Canada

O09-14	Toodoggone District (Lawyers)	O	09	14	57 20 18N	127 10 42W	57.3383333333333	-127.178333333333	5720'N	12711'W	Au-Ag epithermal vein	Au, Ag	Cu, Zn, Pb	Medium.  Pre-production resource of 1.76 million tonnes grading 6.8 g/t Au, 242.7 g/t Ag.	Toodoggone	Schroeter, 1983; Vulimeri and others, 1986; B.C. Minfile, 1990.	Consists of native gold, silver and electrum occur with quartz, calcite and barite in veins, stockwork and breccia. Deposit hosted in Early Jurassic Toodoggone volcanic rocks.  Production from four principal deposits, the Cheni, Chappelle, Shas, and AC.  Deposit mainly occurs in intensely silicified zones within propylitic and argillic altered volcaniclastic rocks.  Deposit associated associated with faults and plutons of the calc-alkaline Black Lake Suite, coeval and comagmatic with the Early Jurassic Toodoggone volcanics.  Deposit age interpreted as Early Jurassic. 	Canada

O09-15	Galore Creek (Stikine Copper)	O	09	15	57 08 12N	131 27 12W	57.1366666666667	-131.453333333333	5708'N	13127'W	Porphyry Cu-Au, Cu-Au skarn	Cu	Au, Ag, Zn, Mo	Large.  Reserves of 125 million tonnes grading 1.06% Cu, 7.7 g/t Ag, 0.4 g/t Au.	Galore Creek	Allen and others, 1976; Christopher and Carter, 1976; EMR Canada, 1989; Dawson and others, 1991;  Mining Review, 1992, J. Mortensen, written commun., 1993.	Consists of chalcopyrite, pyrite, bornite and magnetite that occur as disseminations, skarns, coarse replacements and fracture fillings in syenitic porphyry and breccias and Triassic Takla Group metasedimentary and metavolcanic rocks.  Approximately 80% of deposit occurs as skarn and replacement deposits associated with contacts between syenitic intrusives and Triassic volcanic and sedimentary rocks.  Alteration and lithologies are typical of alkalic porphyry deposits.  A  U-Pb zircon age  of 210 Ma is reported for the intramineral syenite porphyry.  Deposit age interpreted as Late Triassic. 	Canada

O09-16	Kemess (Kemess N., Kemess S.)	O	09	16	57 00 24N	126 45 00W	57.0066666666667	-126.75	5700'N	12645'W	Porphyry Cu-Au	Cu, Au		Medium.  Reserves of 345 million tonnes grading 0.21% Cu, 0.55 g/t Au.	Copper Mountain (North)	B.C. Minfile, 1991; El Condor Resources Ltd., annual report, 1992.	Consists of pyrite, chalcopyrite, magnetite, hematite, molybdenite and digenite that occur in stockwork veinlets and fractures and as disseminations. Deposit hosted in Upper Triassic Takla Group volcanic flows and tuffaceous sedimentary rocks.  Mineralization is related to the local emplacement of monzodiorite porphyry intrusives of Early Jurassic age, probably related to the Copper Mtn. Suite.  Kemess deposit consists of two main zones; the Kemess North, where 44 drill holes have defined a  reserve of 116 million tonnes grading 0.19% Cu and 0.38 g/t, and the Kemess South, where reserves, based on systematic drilling on 100 meter centers, are 229 million tonnes grading 0.23% Cu and 0.65 g/t Au.  Deposit age interpreted as Early Jurassic. 	Canada

O09-17	Snip (Shan)	O	09	17	56 39 48N	131 06 18W	56.6633333333333	-131.105	5640'N	13106'W	Au-Pb-Zn polymetallic vein	Au	Zn, Pb, Mo	Medium.  Production and reserves of 1.90 Mt grading 29.5 g/t Au.	Texas Creek	EMR Canada, 1989; Cominco Ltd., annual report,1990; Rhys and Godwin, 1992.	Deposit occurs in a 1 meter to 10 meter thick (avg. 2.5 meters) shear-vein system that cross-cuts Lower Jurassic thick bedded greywackes and siltstones that are intruded by an orthoclase-phyric quartz monzonite stock with K-Ar isotopic age of 195 Ma.  Drilling indicates deposit extends along strike length for 500 m as confirmed by drilling. The main Twin zone exhibits a pronounced internal banding of four ore types: (1) biotite and potassium feldspar with minor pyrite and pyrrhotite; (2) calcite, siderite, pyrite and sphalerite; (3) pyrite, pyrrhotite, arsenopyrite, sphalerite, chalcopyrite, magnetite and galena; and (4) quartz veins with lesser amounts (<2%) of the sulfides.  Deposit age interpreted as Early Jurassic. 	Canada

O09-18	Snippaker Creek (E & L)	O	09	18	56 34 36N	130 41 12W	56.5766666666667	-130.686666666667	5635'N	13041'W	Gabbroic Ni-Cu	Ni, Cu	Pt, Pd, Au	Medium.  Reserves of 2.7 million tonnes grading 0.7% Ni, 0.8% Cu.	Texas Creek	EMR Canada, 1989; B.C. Minfile, 1990.	Consists of pyrrhotite, pentlandite and chalcopyrite that occur in Lower Jurassic Nickel Mountain olivine gabbro stock.  The gabbro intrudes a thick sedimentary and volcanic sequence of the Jurassic Hazelton Assemblage which predate mid-Cretaceous deformation, and constrains the age of the gabbro to 185 to 110 Ma.  Deposit occurs along the intrusion margins as irregular pipe-like zones of veins, disseminations and massive lenses.  Textures indicate sulfides are magmatic.  Gabbro is extensively altered to serpentinite, chlorite, amphibole, epidote, carbonate and prehnite.  Deposit age interpreted as Early Jurassic. 	Canada

O09-19	Eskay Creek-21B Zone	O	09	19	56 38 00N	130 27 00W	56.6333333333333	-130.45	5638'N	13027'W	Kuroko Zn-Pb-Cu massive sulfide	Au, Ag, Pb, Zn, Cu		Medium.  Reserves of 3.9 million tonnes grading 26 g/t Au, 986 g/t Ag.	Coast	EMR Canada, 1989; B.C. Minfile, 1991; Prime Equities Inc., 1991; Ettlinger, 1992; MacDonald, 1992.	Consists of sphalerite, tetrahedrite, boulangerite and bournonite with minor pyrite and galena that occur as stratabound and stratiform massive, semi-massive and disseminated layers in carbonaceous and tuffaceous mudstone of the Lower Jurassic Mount Dilworth Formation of the Hazelton Assemblage.  Gold and silver occur as electrum grains (5 to 80 microns) within fractured sphalerite, commonly in contact with galena.  Included in the 3.9 million tonnes reserves for the 21B zone are 1.04 million tonnes grading 63.8 g/t Au and 2567 g/t Ag.  The 21A zone of the Eskay Creek property is a coeval epithermal vein deposit with reserves of 0.97 million tonnes grading 9.6 g/t Au and 127 g/t Ag.  Deposit age interpreted as Middle Jurassic.  	Canada

O09-20	Sulphurets (Gold Zone)	O	09	20	56 30 18N	130 15 36W	56.505	-130.26	5630'N	13016'W	Porphyry Cu-Au	Au, Cu		Medium.  Reserves of 18.2 million tonnes grading 0.82 g/t Au, 0.35% Cu.	Texas Creek	B.C. Minfile, 1989; Prime Equities Inc., 1991; MacDonald, 1992.	Consists of chalcopyrite, pyrite and lesser bornite that occur in quartz vein stockworks and as disseminations hosted in intermediate volcanics of the Lower Jurassic Unuk River Formation of the Hazelton Assemblage.  The Gold Zone forms a 1.5 km northeast-trending halo surrounding the Main Copper deposit.  Alteration in the Copper deposit consists of quartz-albite-pyrite-chalcopyrite.  Alteration associated with gold mineralization is quartz-pyrite-sericite.  Deposit age interpreted as Jurassic. 	Canada

O09-21	Kerr (Main Zone)	O	09	21	56 28 06N	130 16 00W	56.4683333333333	-130.266666666667	5628'N	13016'W	Porphyry Cu-Au	Cu, Au, Ag		Large.  Reserves of 134.9 millon tonnes grading 0.76% Cu, 0.34 g/t Au.	Texas Creek	B.C. Minfile, 1989; EMR Canada, 1989; MacDonald, 1992.	Consists of fine sooty black chalcocite with minor chalcopyrite, native copper and pyrite that occur in siliceous breccia.  Hosted in Lower to Middle Jurassic Unuk River Formation volcaniclastic and sedimentary rocks of the Hazelton Assemblage.  Deposit occurs along trace of an elongated tectonic shear zone approximately 2 km long and 800 to 900 meters wide.  Deposit  interpreted as hypogene zone of a porphyry Cu-Au deposit in a subvolcanic environment.  Deposit age interpreted as Early Jurassic. 	Canada

O09-22	Snowfields (Sulphurets)	O	09	22	56 28 00N	130 11 18W	56.4666666666667	-130.188333333333	5628'N	13011'W	Au-Ag polymetallic vein	Au, Ag	Cu, Mo	Medium.  Reserves of 20 milion tonnes grading 2.7 g/t Au.	Texas Creek	B.C. Minfile, 1988; MacDonald, 1992.	Consists of Au and Ag in foliated, chlorite-sericite altered zones that occur in Lower-Middle Jurassic volcanic, and sedimentary rocks of the Unuk River formation.  Low-grade gold part of deposit, with pyrite, minor chalcopyrite and molybdenite disseminated in mafic volcanic breccia is not noticeably different from barren rock. Deposit lacks quartz veins and silicification.  Deposit age interpreted as Middle Jurassic. 	Canada

O09-23	Brucejack Lake (West Zone, Shore Zone)	O	09	23	56 28 06N	130 11 30W	56.4683333333333	-130.191666666667	5628'N	13012'W	Au-Ag polymetallic vein	Au, Ag		Medium.  Reserves of 1.44 million tonnes grading 12.9 g/t Au, 764 g/t Ag.	Texas Creek	B.C. Minfile, 1988; MacDonald, 1992.	Consists of electrum that occurs in quartz veins and stockwork with pyrite, pyrargyrite, sphalerite, tetrahedrite, argentite and galena with minor chalcopyrite and sulfosalts. Deposit hosted in intensely altered (quartz-carbonate-sericite-pyrite assemblage) alkalic volcanic and associated sedimentary rocks of the Lower to Middle Jurassic Unuk River Formation of the Hazelton Assemblage.  Reserves for the West Zone are 0.95 million tonnes grading 14.8 g/t Au and 677 g/t Ag; reserves for the Shore Zone (also called Near Shore Zone) are 0.49 million tonnes grading 9.2 g/t Au and 933 g/t Ag.  Deposit age interpreted as Middle Jurassic. 	Canada

O09-24	Sustut Copper	O	09	24	56 36 30N	126 40 30W	56.6083333333333	-126.675	5637'N	12641'W	Basaltic Cu	Cu		Medium.  Reserves of 50 million tonnes grading 1.25% Cu.	Sustut	Kirkham, 1970; Harper, 1977; Wilton and Sinclair, 1988; EMR Canada, 1989; Dawson and others, 1991; Mining Review, 1992.	Consists of a stratabound assemblage of hematite, pyrite, chalcocite, bornite, chalcopyrite and native copper that occurs as disseminatations and as blebs and grains in the matrix of sandstone, conglomerate, tuff breccia and lahar of the Upper Triassic Takla Group.  Deposit occurs in a sheet-like zone up to 76 m thick.  Grade increases in finer grained units. Pyrite forms an incomplete envelope around cupiferous lenses.  Hematite is ubiquitous.  Deposit age interpreted as Late Triassic. 	Canada

O09-25	Granduc (South Leduc)	O	09	25	56 12 42N	130 20 36W	56.2116666666667	-130.343333333333	5613'N	13021'W	Besshi massive sulfide	Cu	Ag, Au, Co	Medium.  Reserves of 32.5 million tonnes grading1.93% Cu, 7 g/t Ag, 0.13 g/t Au.	Coast	Grove, 1986; B.C. Minfile, 1988; Dawson and others, 1991.	Consists of several overlapping tabular massive lenses of chalcopyrite, pyrite, pyrrhotite, magnetite, sphalerite, galena, arsenopyrite, bornite and cobaltite mineralization that occur in Upper Triassic Unuk River Formation, schistose, andesitic volcanic and gypsiferous, graphitic and calcareous sedimentary rocks. Stratified rocks intruded by Jurassic-Tertiary quartz diorite plutons and dikes.  Individual ore zones range up to 10 m thick, several hundred m long, and are multiply deformed.  Deposit age interpreted as Late Triassic. 	Canada

O09-26	Silbak-Premier (Premier Gold)	O	09	26	56 03 06N	130 00 42W	56.0516666666667	-130.011666666667	5603'N	13001'W	Au-Ag epithermal vein	Au, Ag, Pb, Zn		Medium.  Reserves of 6.1 million tonnes grading 2.33 g/t Au, 90.5 g/t Ag.	Texas Creek	Alldrick and others, 1987; Britton and Alldrick, 1988; Dawson and others, 1991; Prime Equities Inc., annual report,1991.	Consists of veins and stockwork in volcanic and volcaniclastic rocks of the Hazelton Assemblage that are intruded by coeval, subvolcanic quartz-K-feldspar porphyry dikes related to the Early Jurassic Texas Creek granodiorite.  Pyrite, sphalerite and galena are the most abundant sulfides.  Gold and silver occur in argentite and electrum.  Deposit ranges from siliceous, low sulfide Au-Ag to semi-massive base metal sulfide ore.  Deposit mainly hosted in the tuffaceous units and occurs as quartz-carbonate-chlorite veins.  Pervasive sericite forms a halo to siliceous ore. Sulfide ore is flanked by carbonate alteration.  Production between 1918 and 1987 was 56.117 tonnes of Au and 1270 tonnes of Ag from 4.237 million tonnes of ore milled.  Deposit age interpreted as Early Jurassic.	Canada

O09-27	North Bradfield Canal	O	09	27	56 23 10N	131 23 25W	56.3861111111111	-131.390277777778	5623'N	13123'W	Fe skarn	Fe, Cu		Drill core averages 65% Fe and 0.1 to 0.5% Cu.	Central-Southeastern Alaska	MacKevett and Blake, 1963; Sonnevil, 1981	Eleven magnetite-chalcopyrite skarn bodies with sparse pyrrhotite form crude strata-bound lenses in upper Paleozoic(?) marble and paragneiss intruded by Tertiary granite of the informally named Coast plutonic-metamorphic complex of Brew and Ford (1984) intruded by Tertiary granite.  Bodies range from 15 to 106 m long and 0.6 to 12 m thick.  	Alaska

O09-28	Riverside	O	09	28	56 00 00N	130 04 00W	56	-130.066666666667	5600'N	13004'W	Au quartz vein or polymetallic vein	Ag, Au, Cu, Pb, W, Zn		Produced about 27,200 tonnes, yielding 93,300 g Au, 3.1 million g Ag, 45,400 kg Cu, 113,500 kg Pb, 9,080 kg Zn, and 3,500 units (318,000 kg) WO3	Juneau	Buddington, 1929; Byers and Sainsbury, 1956; Smith, 1977	Disseminated galena, pyrite, tetrahedrite, pyrrhotite, chalcopyrite, sphalerite, gold, and scheelite in two large quartz veins and in the Lindeberg lode, a combined quartz vein and epigenetic replacement deposit.  Veins occur either in shear zone in schist inclusion, or in mylonitic gneiss derived from the Triassic Texas Creek Granodiorite of the informally named Coast plutonic-metamorphic complex of Brew and Ford (1984).  More than 1,820 m of underground workings.  Production between 1925 and 1952.  	Alaska

O10-01	Churchill (Davis Keays)	O	10	01	58 22 48N	125 11 12W	58.38	-125.186666666667	5823'N	12511'W	Cu vein	Cu		Medium.  Reserves of 1.12 million tonnes; Production of 498,000 tonnes grading 3.43% Cu.	Churchill	Preto and Tidsbury, 1971; Bell, 1982; EMR Canada, 1989; B.C. Minfile, 1992; Dawson and others, 1991.	Consists of chalcopyrite in quartz-carbonate veins and stringers that occur in strongly folded Late Proterozoic dolomites and slates of the Aida Formation (with K-Ar isotopic age 780 Ma), of the Muskwa Assemblage.  At least three, large north-trending diabase dikes locally intrude sedimentary rocks.  The steeply dipping Magnum vein system forms a zone 100 meters wide that trends northeastward, parallel to two dikes.  Grade is highly variable and discontinuous.  Deposit age interpreted as Late Proterozoic.	Canada

O10-02	Driftpile Creek (Saint, Roen)	O	10	02	58 04 30N	125 54 00W	58.075	-125.9	5805'N	12554'W	Sedimentary exhalative Pb-Zn	Pb, Zn, Ba		Medium.  Reserves of 18.1 million tonnes grading 2.38% Pb+Zn.	Gataga 	MacIntyre, 1982; B.C. Minfile, 1990; EMR Canada, 1989; Insley, 1991, Paradis and others, 1995.	Consists of three stratiform pyrite, galena, sphalerite, barite horizons that occur in siliceous black turbidites of the Upper Devonian Gunsteel Formation of the Lower Earn Group. Sedimentary rocks interpreted as a Devonian-Mississippian clastic wedge.  Massive barite occurs in 4-10 cm thick beds over stratigraphic intervals of 3-6 meters and strike length of 50 km in the Gataga district.  Deposit age interpreted as Late Devonian. 	Canada

O10-03	Cirque (Stronsay)	O	10	03	57 31 00N	125 09 00W	57.5166666666667	-125.15	5731'N	12509'W	Sedimentary exhalative Pb-Zn	Pb, Zn, Ag, Ba		Large.  Reserves of 52.2 million tonnes grading 2% Pb, 8% Zn, 47 g/t Ag.	Gataga	Jefferson and others, 1983; Pigage, 1986; EMR Canada, 1989; Dawson and others, 1991; Mining Review, 1992.	Consists of stratiform, laminar banded, massive barite with pyrite, galena and sphalerite that occur in turbiditic shale and argillite of the Upper Devonian Gunsteel Formation. Sedimentary rocks interpreted as a Devonian-Mississippian clastic wedge. Surrounding rocks are silicified and contacts between sulfide bodies and sediments are sharp.  Deposit occurs as a tapering wedge-shaped lens, about 1000 m x 300 m x (10-60 m)  that consists of a barite-rich, pyritic sphalerite-galena and laminar pyritic assemblage. Deposit age interpreted as Late Devonian. 	Canada

O10-04	Redfern L. (Egg, Foo, Be)	O	10	04	57 22 12N	123 51 30W	57.37	-123.858333333333	5722'N	12352'W	Southeast Missouri Pb-Zn	Zn, Pb	Ba, F	Medium (estimate). 	Robb Lake 	Macqueen, 1976; B.C. Minfile, 1992.	Consists of massive barite, barite-calcite and calcite zones that occur in Dunedin Formation limestone that form aprt of a Cambrian-Devonian passive margin. Disseminated sphalerite, galena, and minor chalcopyrite occur in the silicified haloes of these zones.  Sulfides also occur in calcite  barite veins.  Deposit age interpreted as Middle Devonian. 	Canada

O10-05	Robb Lake	O	10	05	56 56 30N	123 43 42W	56.9416666666667	-123.728333333333	5657'N	12344'W	Southeast Missouri Pb-Zn	Zn, Pb		Large.  Resource of: 20.1 million tonnes grading 5.1% Pb-Zn.	Robb Lake 	 Taylor and others, 1975; Macqueen, 1976; BC Minfile, 1982; EMR Canada, 1989; Dawson and others, 1991; Mining Review, 1992.	Consists of sphalerite, galena and pyrite that occur primarily in tabular and lenticular zones parallel to bedding  in dolomite collapse breccias of the Middle Devonian Stone Formation. Sedimentary rocks interpreted as part of a Cambrian-Devonian passive margin. Deposit occurs on the west limb crest of a large south plunging anticline.  Recent figures (1992) for reserves are significantly downgraded to 5.5 million tonnes grading 7.9% Pb+Zn.  Deposit age interpreted as Middle Devonian.

	Canada

O10-06	Aley	O	10	06	56 27 12N	123 44 06W	56.4533333333333	-123.735	5627'N	12344'W	Carbonatite-related REE	Nb, Phosphate, REE		Large.  Reserves of 20 million tonnes grading 0.7% Nb.	Unassigned	Pell, 1986; B.C. Minfile, 1989; Mining Review, 1991.	Consists of fersmite, pyrochlore and columbite with lesser apatite and minor rutile, magnetite and zirconthat  occur in the core zone of a carbonatitie complex that is cylindrical with a nearly vertical axis.  Niobium exhibits zonation with columbite in the core, carbonatite and pyrochlore in the outer carbonatites, and fersmite as a transition between the two.  REE  associated with sovite (calcite carbonatite)  veins.  K-Ar age mica of 349 Ma  12 Ma. Deposit occurs in Mississippian Aley Carbonatite Complex that intrudes quartzite and mudstone of Cambrian and Silurian age juxtaposed by imbricate thrust faulting.  The complex forms a rough oval approximately 3 km to 3.5 km in diameter with a rauhaugite (dolomitic) carbonatite core and an amphibolite margin.  Deposit age interpreted as Mississippian.	Canada

O10-07	Wasi Lake Area (Suzie, Beveley, Regent)	O	10	07	56 08 48N	125 03 24W	56.1466666666667	-125.056666666667	5609'N	12503'W	Southeast Missouri Pb-Zn	Pb, Zn, Ag, Ba		Medium.  Reserves of 2.82 million tonnes grading 2.24% Zn, 1.42%  Pb, 36.3 g/t Ag.	Ingenika	EMR Canada, 1989; Ferri and others, 1992.	Consists of galena and sphalerite that occur in veinlets and disseminated in barite masses. Deposit hosted in Late Proterozoic, Lower Cambrian, and Ordovician to Devonian dolomite. Deposit also consists of stockwork veinlets and fracture fillings in brecciated dolomite.  Deposit occurs in four zones.  Deposit age interpreted as Cambrian to Devonian.  	Canada

O10-08	Akie	O	10	08	57 12 42N	124 28 48W	57.2116666666667	-124.48	5713'N	12429'W	Sedimentary exhalative  Zn-Pb	Zn, Pb, Ag, Ba		Large.  Resource of 20 million tonnes grading 4% Zn, 1% Pb, 10  g/t Au.	Gataga	Metall Mining Corp. news release, January, 1995.	Consists of layers of pyrite, sphalerite, galena and barite that are interlaminated with black shale of the Upper Devonian Gunsteel formation that forms part of a Devonian and Mississippian clastic wedge.  Preliminary drilling in 1994 defined a zone 6-30 m thick, 1400 m long and up to 300 m deep. Deposit age interpreted as Late Devonian.	Canada

O53-01	Gornoe Ozero	O	53	01	59 56 17N	137 00 09E	59.9380555555556	137.0025	5956'N	13700'E	Carbonatite-related REE	REE, Ta, Nb		Average grade of 0.35% REE oxides; 0.09-0.36% Nb205 ; 0.011% Ta205 .	Khamma River	 Elyanov, Moralov, 1973; Kobtseva, Devyatkina, written commun., 1988; Samoilov, 1991.	Consists of early- and late-stage carbonatites. Early stage occurs in steep veins up to 25 m thick and to 150 m long. Veins composed of augite-diopside-calcite, forsterite-calcite, and pyrochlore-betafite.  Late stage occurs in a small stock with an area of 1 km2, composed of aegirine-dolomite, aegirine-ankerite, and ankerite along with contains bastnaesite, parisite, monazite, pyrochlore, and columbite.  K-Ar isotopic ages of 280 to 350 Ma.  Deposit hosted in a Late Devonian intrusive complex that is concentrically zoned and composed of 90% carbonatite along with  pyroxenite, ijolite, and nepheline and alkalic syenite.  Complex covers an area of 10.3 km2. Age of mineralization interpreted as probably 290 Ma.	Russia

O53-02	Yur	O	53	02	59 54 49N	137 48 28E	59.9136111111111	137.807777777778	5955'N	13748'E	Au quartz vein	Au		Small.  Average grade of 3.5-5.7 g/t Au.	Allakh-Yun	Strona, 1960; Kobtseva, written commun., 1988. 	Consists of four interbedded quartz veins that occur in a zone of meridional faults in middle Carboniferous sandstone-shale.  Veins range from  0.3-0.4 m thick and are 100-500 m long.  Main ore minerals are gold, arsenopyrite, galena, pyrite, and sphalerite. Ore minerals comprise up to 2% of veins. Gangue minerals are quartz, ankerite, and albite.  Wallrock alteration is insignificant, but includes sericitie, silicifica, and arsenopyrite alteration.	Russia

O53-03	Urui	O	53	03	59 51 32N	136 46 35E	59.8588888888889	136.776388888889	5952'N	13647'E	Southeast Missouri Pb-Zn	Pb, Zn		Medium to large.  Average grade of 9.9-25.6 Pb; 6.4-21.3% Zn; 6.8-200 g/t Ag; up to 10 g/t Ge.	Sette-Daban	Ruchkin and others, 1977;  Volkodav and others, 1979; Bogovin and others, 1979; Kobtseva and Devyatkina, written commun., 1988.	Consists of stratified ribbon-like deposits, from 2-3 to 40 m thick and 0.5 to 1.2 km long, that occur in metamorphosed Late Proterozoic (Vendian) dolomite.  Ore bodies are conformable to host rocks and strike 30-45NW; and commonly wedge out at a depth of 30-40 m.  Deposits vary from massive, pocket-stringer-disseminated, to banded.  Galena and sphalerite are the main ore minerals; pyrite, maracasite, and arsenopyrite are secondary;  pyrrhotite, chalcopyrite, and electrum are scarce.  Calcite, quartz, and anthraxolite also occur. Deposit associated with a significant recrystallization of dolomite and formation of peculiar zebra dolomite rocks. General structural pattern of deposit controlled by monoclinal strike of sedimentary rocks to the west and by numerous post-ore faults that trend roughly east-west and strike northwest.  Local Paleozoic diabase dikes in area.	Russia

O53-04	Duet	O	53	04	59 47 32N	137 44 14E	59.7922222222222	137.737222222222	5948'N	13744'E	Au quartz vein	Au		Medium.  Average grade of 29 g/t Au.	Allakh-Yun	Kobtseva, written commun., 1988.	Consists of eighteen rootless, conformable, sheet-like quartz veins that occur at different levels within an 60-80 m interval of Middle Carboniferous sandstone and siltstone that is 150 to 120 m thick.  Veins occur in both the limbs and hinge of the Duet syncline, and are up to 1,600 m long and up to 0.9 m thick.  Ore minerals comprise 1-3% of veins and include arsenopyrite, galena, sphalerite, and gold.	Russia

O53-05	Khamna	O	53	05	59 42 39N	136 25 03E	59.7108333333333	136.4175	5943'N	13625'E	Carbonatite-related REE	REE, Nb		Average grade of 0.2-1.93% REE; 0.03-0.26% Nb205 .	Khamma River	Elyanov and Moralev, 1973; Kobtseva and Devyatkina, written commun., 1988.	Consists of steep-lying fluorite-carbonate veins and stockworks that occur in Late Proterozoic metasomatic carbonate in the vicinity of dikes and stocks of probable Late Devonian alkalic syenite and alkalic magmatic breccia.  Veins range from 0.1 to 1.5 km long and from 1.4 to 30 m thick.  Individual stockworks are 100-500 m2 in size.  Disseminated mineralization also occurs.  Main ore minerals are bastnaesite, parisite, and galena.  U-Th-Pb isotopoic age of 240 to 417 Ma for syenite.  	Russia

O53-06	Lugun	O	53	06	59 07 31N	136 39 04E	59.1252777777778	136.651111111111	5908'N	13639'E	Southeast Missouri Pb-Zn	Pb, Zn		Medium.	Sette-Daban	Stavtsev, 1976; Krasny and others, 1979.	Consists of stratiform galena-sphalerite layers in Late Proterozoic (Vendian) algal dolomite.  Sulfide layers range from 3 to 15 m thick.  Deposit associated with bedding silicification and recrystallization of dolomite.  Sulfide layers in zone that is 350 m thick.  Deposit and enclosing strata occur in brachyform fold.	Russia

O53-07	Algaminskoe	O	53	07	58 39 31N	135 33 36E	58.6586111111111	135.56	5840'N	13534'E	Carbonate-hosted Zr (Algoma type)  	Zr, W		Large.  Weathered zones containing 2.8 to 3.2% W2O3  and 0.5 to 40% ZrO2.  	Algama	Nekrasov and Koezhinskaya, 1991; J.N. Aleinikoff, written commun., 1993.	Consists of lense-like bodies up to 1,100 m long with irregular bodies of W-Zr minerals. Ore bodies range from 2, 3, and 5 m thick occur in layers of siliceous, cavenous dolomite. Layers spaced between14 and 25 m apart. Layers contain loose aggregate that is rich in baddeleyite, the principal mineral that contains the Zr and W.  Weathered zones contain from 2.8 to 3.2% W2O3.  Baddeleyite forms cryptocrystalline and colloform aggregates that fill cavities and voids in quartz-bearing dolomite. Hydrous zircon and Ca- and Fe-zirconium silicates also occur in weathered ore.  Zircon dominates  primary ore.  Baddeleyite was deposited from oversaturated chloride-hydroxide solutions at 100-180C.  Deposit originally interpreted as of Latest Proterozoic (Vendian) age; however a recent U-Pb zircon isotopic age of 110 Ma indicates a  Cretaceous age. Deposit hosted in the Yudomsky Dolomite sequence of Latest Proterozoic (Vendian) age at about 7 km from the contact of the alkalic to mafic Ingili stock.	Russia

O53-08	Muromets	O	53	08	58 47 36N	137 38 28E	58.7933333333333	137.641111111111	5848'N	13738'E	Cu-Mo skarn	Cu, Mo, W		Small to medium. Up to 10% Cu, up to 0.92% WO3, up to 0.3% Mo.	Allakh-Yun	Krasny, Rasskazov, 1975; Nikitin, Rasskazov, 1979. 	Skarn occurs in Middle Cambrian dolomite along the contact with Early Cretaceous quartz monzodiorite as a band of skarn bodies that are 1 km long and dip gently (20-40) under the intrusion.  Several ore bodies, range from 6 to 12 m thick, consist of disseminated, stringer-disseminated, and more seldom massive ore.  Minor magnesian skarn in deposit consists of spinel, forsterite, phlogopite, tremolite, diopside, and serpentine.  Predominant limestone skarns consist of salite, diopside, scapolite, grossular, and andradite. Ore minerals are magnetite, chalcopyrite, molybdenite, scheelite, pyrrhotite, bornite, pyrite, galena, and sphalerite.  Skarn formed several stages: (1) magnesian skarn with magnetite; (2) calcareous pyroxene-garnet skarn with magnetite and scheelite;and (3) metasomatic quartz-feldspar rocks with molybdenite and Cu sulfides.  Disseminated Cu  also occurs in adjacent altered quartz monzodiorite that constitutes a skarn-related porphyry Cu deposit.	Russia

O53-09	Malyutka	O	53	09	58 38 17N	137 16 23E	58.6380555555556	137.273055555556	5838'N	13716'E	Au quartz vein	Au		Small. From 0.01-98 g/t Au.	Allakh-Yun	Kobtseva, written commun., 1988.	Consists of approximately east-west-trending mineralized shear zones, up to 1 km long and 0.3-3 m thick, and quartz veins up to 40 m long and 0.5 to 40 cm thick. Shear zone minerals are quartz, ankerite, barite, rutile, fluorite, hematite, pyrite, sphalerite, galena, chalcopyrite, and gold. Deposit hosted in Early  Cambrian sedimentary rocks on the the southeast limb of a syncline.	Russia

O53-10	Borong	O	53	10	58 33 08N	137 40 19E	58.5522222222222	137.671944444444	5833'N	13740'E	Sediment-hosted Cu 	Cu

		Small.  Average grade of  0.1 to 1% Cu.	Bilyakchan	Kogen and others, 1976; Kobtseva and Devyatkina, written commun., 1988.	Consists of supergene minerals such as malachite, azurite, and chrysocolla that occur in fine-fissured stringers. Hosted in a bed of Late Proterozoic quartz-feldspar and polymictic sandstone that  is 2 m thick and extends for 7 km.  	Russia

O53-11	Kondyor	O	53	11	57 32 44N	134 37 55E	57.5455555555556	134.631944444444	5733'N	13438'E	Zoned mafic-ultramafic Cr-PGE 	Pt		Medium   	Kondyor	Marakushev and others, 1990.	Consists of two types:  (1) short lenses about 2 to 50 m long and up to few m thick with veinlet and disseminations; and  (2) oval-shaped deposits, roughly equidimensional in plan, and up to 200 by 300 m in size.  PGE in the first type is associated with chromite and olivine and occurs in intergrowths, small inclusions, and vesicles. Second type consists of chrome diopside, phlogopite, and magnetite  with PGE forming intergrowths with magnetite, pyroxene, and rarely with phlogopite. Isoferroplatinum is the major PGE mineral.  In addition to isoferroplatinum and tetraferroplatinum, second type commonly contains up to 5-8% sulfides and arsenides, including cooperite, sperrylite, hollingworthite, konderite, inaglyite, and laurite-euclimanite.  Both types of deposits are cut by veins and dikes of alkalic rocks including nepheline syenite, lujavrite, ijolite, and urtite. PGE mineralization is associated with a dunite stock 6 km2 in diameter, part of a ring-shaped, Late Proterozoic ultramafic-alkalic stock approximately 12 km2 in area.	Russia

O53-12	Severny Uy	O	53	12	57 42 25N	137 24 08E	57.7069444444444	137.402222222222	5742'N	13724'E	Sediment-hosted Cu	Cu		Small. Average grade of 0.1 to 3.7% Cu.	Bilyakchan	Kutyrev and others, 1986.	Consists of Cu-bearing horizons, from 1 to 3 m thick that occur in Late Proterozoic (Riphean) quartz- and polymictic sandstone and siltstone.  Deposit defined by fine disseminations and pockets of massive ore.  Ore minerals are pyrite, chalcopyrite, bornite, chalcocite, and hematite.  Cu mineralization occurs for more than 30 km along strike.	Russia

O53-13	Dzhagdag	O	53	13	57 22 09N	137 13 03E	57.3691666666667	137.2175	5722'N	13713'E	Basaltic Cu	Cu		Small. Average grade of 0.3 to 2.94 Cu.	Bilyakchan	Kutyrev and others, 1988.	Mineralization occurs in two layers of Upper Proterozoic (Upper Riphean) amygdaloidal basalt, which are 90 and 60 m thick respectively, and are intercalated with tuff and sandstone.  The copper-bearing horizons are 0.4-5 m thick.  Ore is fine disseminated and spotted-disseminated.  Ore minerals include:  chalcocite, bornite, native copper, cuprite, covellite, and malachite.  Copper content correlates with silver content.  	Russia

O53-14	Maly Komui	O	53	14	57 23 00N	137 32 07E	57.3833333333333	137.535277777778	5723'N	13732'E	Cu skarn	Cu

	Pb, Zn	Small-to-medium.  Average grade of 0.1-11.0% Cu; 0.1-9.3% Zn; 0.1-4.9% Pb.	Eastern Asia-Arctic: Koni-Yablon	Krasny and Rasskazov, 1975; Kobtseva and Devyatkina, 1988, written commun.	Disseminations and pockets of chalcopyrite, chalcocite, malachite, galena, and sphalerite occur in garnet-pyroxene skarn bodies along the contact between Upper Proterozoic limestone and Cretaceous granitoid bodies.  Skarn forms three zones with a combined length of 1.5 km and thickness ranging from 1 to 80 m.  No detailed studies of this deposit.  	Russia

O53-15	Ulkanskoe	O	53	15	56 19 01N	134 48 52E	56.3169444444444	134.814444444444	5619'N	13449'E	Felsic plutonic REE	REE, Be, Zr		Data are not available  	Ulkan	Nedashkovsky, 1984; Kirillov, 1993.	Deposit hosted in alkalic, rapakivi-type granitic stock that occurs in the Ulkansky basin containing Proterozoic and Mesozoic volcano-sedimentary and intrusive rocks. Four groups of ore minerals occur:  (1) columbite, zircon, and cassiterite that occur in albitite veins;  (2) cassiterite, wolframite, and chrysoberyl that occur in topaz-muscovite-biotite greisen;  (3) phenakite, zircon, pyrochlore, polylithionite, chevkinite, and columbite that occur in hydrothermal molybdenite-quartz veins and with alkalic granitic pegmatite and fenite; and  (4) bertrandite, helvite, genthelvite, gold, zircon, thorite, gagarinite, parisite, bastnaesite that occur in hydrothermal veins. Deposit similar to the Pikes Peak area in Colorado.	Russia

O54-01	Burgali	O	54	01	59 56 15N	138 50 31E	59.9375	138.841944444444	5956'N	13851'E	Porphyry-Mo (W)	Mo, W		Average grade of  0.2-0.9% Mo;  0.08-1.4% W.	Allakh-Yun	Rasskazov and others, 1979; Kobtseva and Devyatkina, written commun., 1988.	Consists of a quartz stockwork that extends over an area 60 by 80 m composed of veins that range from 0.5 to 40 cm thick.  Veins hosted in Middle Carboniferous clastic rocks of the Ekachan suite, near the contact of Cretaceous granite intrusions.  Ore minerals are molybdenite, wolframite, and cassiterite. Gangue minerals are biotite and sericite.	Russia

O54-02	Balaakkalakh, Diring-Yuryak	O	54	02	59 50 57N	139 00 46E	59.8491666666667	139.012777777778	5951'N	13901'E	Sn polymetallic vein	Sn		Average grade of 0.002-0.04% Sn: 0.01-0.03% W;  from 1% to 10% As;  up to 10 g/t Au.	Verkhne-Yudomsky	Rasskazov and others, 1979; Kobtseva and Devyatkina, written commun., 1988.	Consists of three ore zones that strike northeast, are 10 to 200 m thick, and 100 to 1,100 m long.  Zones consist of quartz-chlorite-sulfide stockworks and stringers.  Stringers range from 0.2 to 1.5 cm thick and consists of shear zones that contain intergrown quartz, tourmaline, and arsenopyrite. Major ore minerals are arsenopyrite, wolframite, chalcopyrite, and pyrrhotite.  Subordinate ore minerals are cassiterite, scheelite, galena, fahlore, and acanthite.  Zones hosted in sandstone, siltstone, and conglomerate of the Middle Carboniferous Ekachan suite and also in a diorite porphyrite dike. Aeromagnetic data indicate a granitic body occurs at a depth of 50-150 m.	Russia

O54-03	Zhar	O	54	03	59 44 31N	138 11 21E	59.7419444444444	138.189166666667	5945'N	13811'E	Au quartz vein	Au		Small. Average grade of 4.2 g/t Au.	Allakh-Yun	Kobtseva,  written commun., 1988.	Consists of a quartz vein that is about 500 m long and 1.5 m thick.  Vein strikes west to northwest and dips steeply (85) to east.  Ore minerals are disseminated pyrite, chalcopyrite, sphalerite, and gold that constitute up to 1% of the vein.  No indications of wallrock metasomatic alteration. Vein hosted in Permian clastic rocks.	Russia

O54-04	Yurievka	O	54	04	59 41 20N	141 44 21E	59.6888888888889	141.739166666667	5941'N	14144'E	Au-Ag epithermal vein	Au, Ag		Proven reserves of 7536 kg Au. Average ore grade of 14.7 g/t Au; Reserves of 9.12 tonnes Ag. Average ore grade of17.9 g/t Ag.  	Eastern Asia-Arctic: Okhotsk	Kobtseva, written commun., 1988.	Consists of adularia-quartz and quartz veins with less common carbonate-quartz veins.  Other vein minerals are chalcedony, barite, hydromica, chlorite, with disseminations and masses, up to 1-3%, of pyrite, pyrrhotite, sphalerite, galena, chalcopyrite, arsenopyrite, sulfosalts of silver, acanthite, and gold (fineness 600-700).  Ore grade decreases with depth.  Veins occur at a depth of 350 m, are 0.5 to 15 m thick, and range up to 650 m long. Deposit hosted in Early and Late Cretaceous volcanic rocks including andesite, andesite-basalt, ignimbrite, and dacite tuff, and in felsic subvolcanic bodies. Deposit occurs at the intersection of four faults.	Russia

O54-05	Krasivoe	O	54	05	59 27 46N	140 22 20E	59.4627777777778	140.372222222222	5928'N	14022'E	Au-Ag epithermal vein	Au, Ag		Veins average 4.2 g/t Au and 5.6 g/t Ag. Zones contain 15 g/t Au and 18 g/t Ag.	Eastern Asia-Arctic: Okhotsk	Kobtseva, written commun., 1988.	Consists of linear zones of stringers up to 15 m thick, and five quartz-adularia veins about 3.5 m thick. Deposit is about 2 km long and hosted in a Late Cretaceous trachyrhyolite flow or tuff and a trachybasalt dike that occur in the middle of a volcanic dome.  Ore minerals are pyrite (1-3%), galena, sphalerite, chalcopyrite, cinnabar, and gold.	Russia

O54-06	Dies	O	54	06	59 10 19N	138 10 50E	59.1719444444444	138.180555555556	5910'N	13811'E	Cu skarn	Cu		Average grade of 0.2-15% Cu; up to 0.8% Zn; 17.3-70 g/t Ag; 0.3-1.7 g/t Au.	Allakh-Yun	Kobtseva and Devyatkina, written commun., 1988.	Consists of garnet-diopside and garnet-epidote skarns that are 20 to 60 m thick and 400 m long. Skarns occur along the contact of Ordovician clastic and carbonate rocks and Lower- to Middle-Cretaceous granitoids that occur along a north-south-trending fault.  Ore minerals occur as stringers and lenses of chalcopyrite, malachite, azurite, bismuthine, acanthite, scheelite, and galena.	Russia

O54-07	Verkhnenyotskoe	O	54	07	58 16 37N	139 06 11E	58.2769444444444	139.103055555556	5817'N	13906'E	Au-Ag epithermal vein	Au, Ag		Average grade of 5.0 g/t Au; 94.0 g/t Ag.	Eastern Asia-Arctic: Okhotsk	Kobtseva, written commun., 1988.	Consists of quartz and quartz-adularia-calcite veins and linear zones of quartz stringers that are 40-50 m long, 0.5 m thick. Veins and zones composed of up to 25% disseminated galena, sphalerite, chalcopyrite, pyrite, and gold.  Deposit occurs around the periphery of a paleo-caldera.  Host rocks are Late Cretaceous  andesite-dacite tuff, rhyolite, and granite-porphyry dikes.  	Russia

O54-08	Etandzha	O	54	08	57 29 14N	138 39 16E	57.4872222222222	138.654444444444	5729'N	13839'E	Porphyry Cu-Mo	Cu, Mo		Average grade of 0.02-2.0% Cu; 0.02-0.74% Mo; up to 4 g/t Au; up to 15 g/t Ag.	Eastern Asia-Arctic: Koni-Yablon	Kobtseva and Devyatkina, written commun., 1988.	Consists of stringers and disseminations of molybdenite and chalcopyrite that occur in Cretaceous quartz diorite. Deposit occurs in a northeast-trending zone 400 by 200 m.	Russia

O55-01	Ikrimun	O	55	01	59 21 19N	146 59 23E	59.3552777777778	146.989722222222	5921'N	14659'E	Porphyry Cu-Mo   	Cu, Mo		Small.  	Eastern Asia-Arctic: Koni-Yablon	Skibin, 1982	Consisits of a stockwork of sulfide veinlets with abundant disseminated sulfides and rare quartz veins that occur in the middle of the Ikrimun granitic pluton of Early Cretaceous age. Pluton intrudes Early Cretaceous rhyolitic to basaltic volcanic rocks.  Ore minerals are pyrite, chalcopyrite, arsenopyrite, and magnetite, with subordinate molybdenite, ilmenite, and sphalerite.  Deposit occurs in silicified, sericitized, and propylitized quartz diorite, tonalite, extrusive breccia, and plagiogranite porphyry.  Plutonic rocks are spatially related to a plagiogranite porphyry dike.	Russia

O56-01	Osennee, Oksa, Usinskoe	O	56	01	59 44 17N	150 16 16E	59.7380555555556	150.271111111111	5944'N	15016'E	Porphyry Cu-Mo   	Mo, Cu	W, Ag	Small to medium.  Ranges from 0.1 to 0.33% Mo and up to 0.1% Cu.  Up to 5 g/t Ag.  	Eastern Asia-Arctic: Koni-Yablon	Firsov and Soboleva, written commun., 1952; Sendek, written commun., 1965	Osennee:  Crescent-shaped ore body in a north-south-trending fractured and foliated zone within the granitic rocks of the Cretaceous Magadan batholith.  Ore body is more than 400 m long and about 30 m thick, with dips of 35-65.  Host rocks are gabbro, granodiorite, subalkalic granite and syenite, granite porphyry, and lamprophyre.  Molybdenite is accompanied by pyrite and lesser pyrrhotite, sphalerite, chalcopyrite, and scheelite.  Molybdenite occurs in quartz, quartz-feldspar, and quartz-tourmaline veinlets and veins; disseminated in porphyry; and in veinlets in silicified, sericitized, chloritized, K-feldspathized, and pyritized rocks within a fault and in adjacent areas.  

Oksa:  Molybdenite is disseminated in quartz and in quartz-feldspar veinlets cutting silicified and sericitized granite porphyry and adjacent amphibole-biotite granodiorite of the Magadan batholith.  Associated minerals are pyrite, with rare chalcopyrite, sphalerite, and pyrrhotite.  Gold ioccurs in the ore along with up to 5 g/t silver.  Deposit is controlled by a zone of fracturing and schistosity that trends northwest to about north-south.  

Usinskoe:  Quartz, feldspar-quartz, and pegmatite veinlets contain molybdenite and locally scheelite.  Minerals also occurs in veinlets and disseminated in the K-feldspathized and tourmalinized granitic rocks of the Magadan batholith.  Mineralization is confined to a nearly north-south fault which controls the porphyry intrusions.	Russia

O56-02	Yapon	O	56	02	59 25 25N	154 52 01E	59.4236111111111	154.866944444444	5925'N	15452'E	Porphyry Cu   	Cu		Small.  Ag to 1-2 g/t.  	Eastern Asia-Arctic: Koni-Yablon	Yaskevich and Yudina, written commun., 1972	Stockwork zone more than 20 m wide is composed of a dense network of quartz and quartz-epidote veinlets with pyrite and chalcopyrite that cut sulfidized, Middle Jurassic basalt and andesite-basalt.  Disseminated veinlets contain native gold and 1-2 g/t silver.	Russia

O56-03	Nakhtandjin, Lora	O	56	03	59 24 41N	153 28 49E	59.4113888888889	153.480277777778	5925'N	15329'E	Porphyry Cu   	Cu	Mo	Medium to large. Probable resource of 178 million tonnes grading 0.5% Cu, 0.025% Mo, and 2.1 g/t Ag.  	Eastern Asia-Arctic: Koni-Yablon	Skibin, 1982; Vorob'ev, 1986 (written commun.)	A stockwork of sulfide, sulfide-quartz, and sulfide-chlorite-quartz veinlets associated with disseminated sulfides occurs along east-, northeast-, and northwest-trending fault zones at the southeast and northern contacts of Srednin granitic pluton.  Pluton intrudes Triassic-Jurassic and Early Cretaceous volcaniclastic and volcanic rocks.  Early Cretaceous tonalite, granodiorite, and explosive breccias that host the deposit are weakly sericitized and propylitized.  Ore minerals are pyrite, chalcopyrite, and molybdenite, with subordinate magnetite and ilmenite.  Deposit is closely associated with a pipe of explosive breccias.	Russia

O56-04	Viking	O	56	04	58 57 57N	152 34 20E	58.9658333333333	152.572222222222	5858'N	15234'E	Porphyry Cu-Mo   	Cu, Mo		Small.  	Eastern Asia-Arctic: Koni-Yablon	Skibin, 1982	A stockwork of sulfide, sulfide-quartz, and sulfide-feldspar-quartz veins, veinlets, and zones of disseminated sulfides, occurs in Early Cretaceous hydrothermally altered tonalite, plagiogranite, and less commonly in quartz monzonite porphyry.  Granitic rocks form the core of a concentrically zoned dome made up mostly of Jurassic volcanic rocks.  The ore body extends several hundred meters along strike, with a vertical extent of 350-400 m; and is parallel to the contact of a porphyry stock.  An inner alteration zone consists of a podiform zone of potassic alteration; quartz-sericite and epidote-chlorite alteration occurs in the outer zone.  Main ore minerals are chalcopyrite, molybdenite, magnetite, and ilmenite; with minor pyrite and chalcocite.	Russia

O57-01	Tutkhlivayam	O	57	01	59 03 31N	161 44 01E	59.0586111111111	161.733611111111	5904'N	16144'E	Au-Ag epithermal vein	Au, Ag, Cu, Pb, Zn, Te, Cd		Medium.  Average grade of 9.6 g/t Au, 530 g/t Ag, 2.3% Cu, 4% Pb, 0.8% Zn, 0.12% Cd, and 5.38 kg/t Te.	Central Kamchatka	A.K. Borovtsov and others, written commun., 1980.	Consists of 27 zones of veins and veinlets distributed over length of 13 km.  Zones range from 50 to 1250 m long and 0.2 to 25.5 m thick.  Zones have complicated morphology and are dominantly brecciated veins that grade into veins and veinlets.  Ore beds are generally up to 6 m thick.  Three geochemical types ore are distinguished: gold-silver low in sulfides (gold/silver ratio of 1:50), gold-silver (1:1 to 1:2), and gold (1:0.5 and more).  K metasomatism very common. Deposit occurs along closely-spaced system of linear deep faults and normal faults around a volcano-tectonic depression filled with Miocene intermediate composition volcanic rocks. 	Russia

O57-02	Ozernovskoe	O	57	02	57 34 44N	160 47 02E	57.5788888888889	160.783888888889	5735'N	16047'E	Au-Ag epithermal vein	Au, Ag, Te		Medium.  Grade ranges from 2-20 g/t Au and 0.01-0.1% Te.  Rare high-grade zones.	Central Kamchatka	Shchepot'ev, 1989.	Consists of gold-bearing quartz-adularia veins, veinlets, and disseminations that are superimposed on various facies of hydrothermally-altered rocks. Ore occurs in fracture-filling veins and veinlets, and as metasomatic replacement of earlier aggregates. Four stages of mineralization are distinguished: (1) gold-goldfieldite-quartz (fineness of 933-938); (2) tellurium-silvanite-goldfieldite-kaolinite-quartz (gold 945 fine); (3) gold-hessite-hydromica-quartz (gold 894 fine); and (4) gold-adularia-hydromica-quartz (gold 643 to 679 fine). Local associated Cu-Mo sulfides and realgar-orpiment. Host rocks exhibit mainly propylitic and silicia alteration. Altered argillite, of quartz-sericite, quartz-kaolinite, and quartz-montmorillonite-hydromica facies, occurs the central part of the ore field, near the main volcanic vent. Altered rocks consist of quartz and pyrite-alunite-kaolinite-quartz assemblages that form tabular, linear, major ore bodies up to 100 m along northwest-trending fault zones. Deposit occurs in a weakly-eroded volcano composed of basaltic andesite, andesite, and dacitic pyroclastic rocks and lava. 	Russia

O57-03	Chempura	O	57	03	56 11 42N	159 17 42E	56.195	159.295	5612'N	15918'E	Volcanic-hosted Hg	Hg		Small.  Average grade of 0.95%Hg.	Central Kamchatka	Vlasov, 1977.	Consists of disseminations or veins associated with hydrothermal alteration that occur in quartz-diorite porphyry bodies emplaced at intersections of northeast- northwest-, and east-west-trending faults. Mercury distribution is irregular; cinnabar forms major ore mineral. Other ore minerals are common pyrite and subordinate realgar, stibnite, sphalerite, and chalcopyrite. Carbonate-chlorite propylitic alteration is most common. All ore bodies are parallel to altered silicified rocks of quartz and quartz-kaolinite-hydromica assemblages.  A few lense-like ore bodies are traced to a depth of approximately 100 m. Maximum thickness of lenses ranges up to 8 m. Deposit is hosted in hypabyssal quartz diorite porphyry that intrudes a Pliocene agglomerate sequence. Deposit and associated hydrothermally altered silicified rocks occur along steeply dipping faults.	Russia

O58-01	Karagin group	O	58	01	58 52 17N	164 01 49E	58.8713888888889	164.030277777778	5852'N	16402'E	Gabbroic Cu	Cu, Zn, Au, Pt, Ni, Co		Medium.  Average grade of 0.5 g/t, Au, 2-5 g/t Ag, 3-5% Cu, 0.5% Zn.	Koryak Highlands	V.D. Mel'nikov, written commun., 1974.	Hosted in Late Cretaceous serpentinized peridotite and serpentinite, and in a complexly faulted Late Cretaceous-Paleogene(?) spilite-siltstone sequence. Tectonic contacts occur between ultramafic and spilite-siltstone sequence. Richest part of deposit, with up to 5% Cu, occurs in spilite-siltstone sequence. Deposit occurs in steeply dipping lenses extending to a depth of 200 m, determined from geophysical studies, and has maximum dimensions of 170 m length and 25 m thickness.  Ore assemblages in  ultramafic rocks are:  (1) chalcopyrite-cubanite-pyrrhotite with pentlandite; (2) chalcopyrite-magnetite with pyrrhotite and pentlandite; and  (3) magnetite-chalcopyrite-sphalerite.  Average Cu content of the ultramafic rocks is 1 to 3%.  In spilite-siltstone sequence, about 90% of ore consists of about equal proportions of chalcopyrite, magnetite, and pyrite; with minor sphalerite, magnetite, pentlandite, and cubanite.  Relative to ore in spilite-siltstone sequence, ore in ultramafic rocks contains more magnetite, pyrrhotite, and pentlandite.	Russia

P04-01	McLeod	P	04	01	63 16 00N	159 16 00W	63.2666666666667	-159.266666666667	6316'N	15916'W	Porphyry Mo	Mo		Extensive chip samples grade 0.09% MoS2 over a 350 by 30 m surface area	Southwestern Kuskokwim Mountains	Mertie, 1937a, b; West, 1954; Jason Bressler, written commun., 1979; Harold Noyes, written commun., 1984	Platy aggregates of molybdenite in quartz veinlets in sericite core of altered Late Cretaceous to early Tertiary quartz-feldspar (granite) porphyry stock.  Deposit underlain by 3-square-kilometer granite stock and associated with biotite latite dikes that intrude mid-Cretaceous graywackes.  High-grade quartz-molybdenite veins up to 15 cm thick associated with nearby latite dikes in sedimentary host rocks.  Pyrite-pyrrhotite-chlorite veinlets, locally comprise up to 10 percent by volume of contact metamorphosed country rock.  Quartz-feldspar porphyry, and to lesser extent, biotite latite dikes exhibit intense silicic, phyllic, and hydrothermal alteration in a 300 by 1,100 m area of southern and western part of stock.  Low-grade stockwork molybdenite occurs in northern part of biotite latite dike system over a 30 by 350 m area.   	Alaska

P04-02	Mount Hurst	P	04	02	63 14 00N	156 55 00W	63.2333333333333	-156.916666666667	6314'N	15655'W	Podiform Cr	Cr, PGE		Grab samples contain 22.0 to 61.2% Cr2O3	Yukon River	Chapman and others, 1982; Loney and Himmelberg, 1984; Roberts, 1984	Masses and bands of chromite in dunite layers in wehrlite tectonite.  Largest of 16 chromite bands strikes north-south; pinches and swells from 10 to 800 cm over strike length of 10 m.  Within bands, chromite varies from 30% to 80% by volume.  Deposit truncated on north by fault.  Cr:Fe ratios in six samples average 1.0.  Probable source of Pt placer on Boob Creek 10 km to north.  Dunite and wehrlite tectonite faulted at base; interpreted as part of intensely deformed and dismembered ophiolite occurring in klippe.	Alaska

P04-03	Win-Won or Cloudy Mountain	P	04	03	63 13 00N	156 04 00W	63.2166666666667	-156.066666666667	6313'N	15604'W	Sn polymetallic vein	Sn, Ag, Cu		Grab samples with up to 2% Sn  and 1,720 g/t Ag	Southwestern Kuskokwim Mountains	Thomas K. Bundtzen, written commun., 1984	Chalcopyrite, tetrahedrite, and cassiterite in en echelon quartz veinlet stockwork.  Hosted in hornfels on northeast margin of Cretaceous(?) Cloudy Mountains volcanic field and related monzonite complex.  About 4 veinlets per meter over a 100-m-wide area.  	Alaska

P04-04	Cirque, Tolstoi	P	04	04	62 53 00N	156 59 00W	62.8833333333333	-156.983333333333	6253'N	15659'W	Polymetallic vein and porphyry Cu	Cu, Ag, Sn	W, Nb	Grab samples with up to 20% Cu, 1,340 g/t Ag, 0.5% Sn; locally to 0.1% Nb	Southwestern Kuskokwim Mountains	Bundtzen and Laird, 1982	Chalcopyrite, tetrahedrite, pyrite, arsenopyrite, and scheelite associated with tourmaline, axinite, and quartz occurring in (structurally) high-level, tourmaline greisen.  Greisen usually along faults, or in tourmaline breccia pipes in cupolas of the Late Cretaceous Beaver Mountains (monzonite) stock.  Monzonite capped by altered olivine basalt and andesite tuff.  	Alaska

P04-05	Independence	P	04	05	62 57 00N	156 59 00W	62.95	-156.983333333333	6257'N	15659'W	Porphyry Au	Au		Independence deposit was briefly developed in 1912. 5 kg of gold were produced from about 113 tonnes of ore. Grab samples from massive vein material at Katz deposit average 1.2 g/t Au and 35% Sb. 	Southwestern Kuskokwim Mountains	Bundtzen and Laird, 1982, 1983a.	Consists of gold-bearing quartz-carbonate-sulfide veins and sulfide disseminations that occur in peraluminous granite porphyry of the Ganes-Yankee Creek dike swarm (Bundtzen and Laird, 1982). The dike swarm extends about 40 km. The best concentration of veins and disseminations occurs in a 4-km by 1/2 km-wide zone that is near the divide separating Ganes and Yankee Creeks, the two largest placer gold mines in the Innoko district. At the Independence deposit, disseminated arsenopyrite, pyrite, cinnabar, stibnite, and sulfosalt minerals occur in dikes and in altered sandstone of the Late Cretaceous Kuskokwim Group. Massive siderite-calcite veins occur in sandstone adjacent to the granite porphyry. The Katz deposit occurs about 2 km southwest of the Independence Mine and consists of massive stibnite-quartz-gold veins that occur along the contact zones between a granite porphyry sill and sandstone. 	Alaska

P04-06	Broken Shovel, Iditarod	P	04	06	62 37 00N	157 10 00W	62.6166666666667	-157.166666666667	6237'N	15710'W	Polymetallic vein	Ag, Pb, Sb		Estimated 14,000 tonnes with 178 g/t Ag, 0.15% Pb, 0.15% Sb	Southwestern Kuskokwim Mountains	Bundtzen and Gilbert, 1983; Bundtzen and Laird, 1983a, 1988; Bundtzen and others, 1985	Tourmaline, tetrahedrite, arsenopyrite, and undetermined sulfosalts in quartz veins in central part of the Cretaceous Moose Creek pluton (monzonite).  Veins, 1 to 3 m wide, occur in altered area marked by sericite and tourmaline about 300 by 400 m in size.	Alaska

P04-07	Golden Horn, Minnie Gulch, Malemute, Iditarod (Flat District)	P	04	07	62 31 00N	157 55 00W	62.5166666666667	-157.916666666667	6231'N	15755'W	Polymetallic vein or Sb-Au vein	Au, Ag, Sb, Hg, W		Golden Horn: produced 479 tonnes grading 174 g/t Au, 171 g/t Ag, up to 20% WO3.  Estimated resource of about 3.15 million tonnes grading 1.3 g/t Au, 2.0 % As and 30 g/t Ag	Southwestern Kuskokwim Mountains	Bundtzen and Gilbert, 1983; Bundtzen and Laird, 1983a; Bundtzen and others, 1985, 1988, 1992a; Bull, 1988	Golden Horn:  Quartz-tourmaline-calcite veins of stibnite, cinnabar, scheelite, sphalerite, Pb-Sb sulfosalts, and chalcopyrite.  Stibnite and cinnabar crosscut arsenopyrite, scheelite, and silver sulfosalt mineralization.  Veins occur in irregularly distributed quartz-filled shear zones in the Late Cretaceous Otter Creek pluton (monzonite), or near intrusive contacts.  Vein system from 3 to 30 m wide and at least 1 km in length; occurs along 3-km-long fault zone on eastern side of pluton.  Pluton intrudes graywacke and shale of Cretaceous Kuskokwim Group.  Malemute and Granite:  Cinnabar, arsenopyrite, pyrite, and gold in quartz-calcite zones that strike north-south to northeast occur in altered basalt west of Otter Creek pluton.	Alaska

P04-08	Chicken Mountain (Flat District)	P	04	08	62 30 00N	158 00 00W	62.5	-158	6230'N	15800'W	Granitoid-related Au-Ag (Cu)	Au, As, Hg, Sb, Cu, Mo		Estimated resource of about 14.5 million tonnes grading 1.2 g/t Au, 0.09 %  Cu, 0.46% Sb

	Southwestern Kuskokwim Mountains	Bundtzen and others, 1988; 1992a; Bull, 1988; Jason Bressler, written commun., 1980; Richard Gosse, written commun., 1990	Deposit contains quartz-sulfide veinlets containing a wide variety  of ore minerals including free gold, stibnite, cinnabar, arsenopyrite, chalcopyrite molybdenite, silver sulfosalts, and arsenian pyrite.  Quartz veins contain (5% total) sulfides.  All mineralization hosted in cupola zones of altered monzonite and syenite of Chicken Mountain stock.  Earlier monzodiorite, alkali gabbro, and wehrlite phases also present.  Pervasive sericite and ankerite alteration halos present.  Dolomite breccia phase synchronous with major sulfide phase.  Surface extent of mineralization occupies a 300 by 800 meter area; drilling indicates at least 250 meters of vertical extent.  Drill results and mapping indicates a vertical temperature zonation is present with epithermal gold-mercury-antimony zones crosscutting older mesothermal gold-copper-molybdenum and arsenic-copper events.  Pluton and mineralization yield coeval K-Ar ages of 70 Ma.	Alaska

P04-09	DeCourcey Mountain	P	04	09	62 15 00N	158 30 00W	62.25	-158.5	6215'N	15830'W	Hot-spring Hg	Hg, Sb, As		Produced 1,200 flasks Hg.  Grab samples contain up to 6.5% Hg	Southwestern Kuskokwim Mountains	Cady and others, 1955; Sainsbury and MacKevett, 1965; Thomas K. Bundtzen and Marti L. Miller, written commun., 1985	Cinnabar, minor stibnite, and traces of arsenopyrite in silica-carbonate dikes that cut sandstone and shale of Cretaceous Kuskokwim Group, and olivine basalt dated at 76 Ma.  Sulfides occur usually in irregular breccia zones, or as replacement along intrusive contact.  Individual ore bodies, from 0.2 to 2.0 m thick in zone 600 by 100 m in area with vertical relief of 20 m.  Individual sulfide bodies rarely more than 20 m long, with common pinching and swelling.  The silica dikes consist largely of quartz, carbonate, and clay minerals and probably represent altered basalt dikes.	Alaska

P04-10	Snow Gulch-Donlin	P	04	10	62 13 00N	158 15 00W	62.2166666666667	-158.25	6213'N	15815'W	Sb-Au vein	Sb, Au, As, Hg		Drill-indicated reserves of 40.4 milion tonnes containing 111, 930 kg gold.	Southwestern Kuskokwim Mountains	T.K. Bundtzen and M.L. Miller, written commun., 1988; Bruce Hickok and Robert Rutherford, written commun., 1990; Bundtzen and others, 1996.	Stibnite, arsenopyrite, and complex arsenic sulfosalts and minor to trace cinnabar and free gold as blades, crystals and disseminations in quartz veins and shear zones associated with 4 km long sheeted dike and sill complex.  At least three ages of dikes have been identified; dikes range in composition from quartz monzonite to alaskite to granite porphyry.  One granite porphyry dike yields K-Ar age of 65 Ma.  Mineralization usually occurs at contacts between dikes and mid-Cretaceous Kuskokwim Group flysch, but locally extensive auriferous zones up to 20 meters wide found permeating clastics and hornfels.  Considerable gold found in lattice structures of arsenic minerals.	Alaska

P04-11	Mission Creek, Headwall, Louise, and Owhat Prospect	P	04	11	61 46 00N	158 32 00W	61.7666666666667	-158.533333333333	6146'N	15832'W	Polymetallic vein	Au, Ag, Cu, As	Sb, Bi, Co, W, Sn, U	Inferred reserve of 225,000 tonnes grading 4.0 g/tone Au,9.5% As, 0.61% Cu, 0.01% Sn, 0.2% Sb, and 0.02% Co	Southwestern Kuskokwim Mountains	Bundtzen and Laird, 1991	Sheet-like greisen veins with tourmaline, tetrahedrite, chalcopyrite, arsenopyrite, cassiterite, metazeunerite, scheelite, and axinite.  Zones of en-echelon vein-greisens all trend N20-25W and dip steeply or vertically.  Zones occur  about 3 km along strike and are about 1 km wide.  Gold occurs as both free milling grains in gangue and in lattice structures of arsenopyrite.  Bismuth sulfosalts bismuthinite, aramayoite, pekoite, and gladite locally in abundant.  Veins occur in zones in cupola of Late Cretaceous porphyritic quartz syenite stock.  Zones up to 20 m wide.  About 300 m of drifts at Mission Creek.  Local numerous euhedral gangue minerals.  Louise deposit contains up to 1.50% Sn.	Alaska

P04-12	Red Devil	P	04	12	61 45 00N	157 23 00W	61.75	-157.383333333333	6145'N	15723'W	Clastic sediment-hosted Hg	Hg, Sb		Produced 34,745 flasks from 68,000 tonnes through 1963.  Produced 4,000 flasks, 1970 to 1972.  Average grade of 1.5% Hg and 2% Sb	Southwestern Kuskokwim Mountains	Herreid, 1962; MacKevett and Berg, 1963; H.R. Beckwith, written commun., 1965; Thomas K. Bundtzen, written commun., 1985; Miller and others, 1989; Goldfarb and others, 1990	Cinnabar and stibnite in about 20 plunging chimney-like ore bodies located along intersections of north-northwest trending silica-carbonate dikes and bedding plane faults in graywacke and shale of the Cretaceous Kuskokwim group .  Ore bodies are crudely prismatic and range from a few centimeters to about 0.4 m in thickness and from 0.1 to 10 m in strike length.  Ore bodies plunge along and near intersections between northeast-southwest-trending altered dikes and northwest-southeast-trending faults.  Vertical zonation in deposit with pure cinnabar at surface, and increasing stibnite to cinnabar ratios at depth.  At 200 m below surface, mainly stibnite and quartz with trace cinnabar.  Largest and best exposed of 15 deposits in Kuskokwim mercury belt.  Produced about 80 percent of Alaska mercury from 1942 to 1974.  Silica-carbonate dikes composed of fine-grained calcite, chalcedony, limonite, and sericite, and subordinate quartz, hematite, and clay minerals.  Relict phenocrysts replaced by calcite.  Relict diabasic textures in Parks and Willis deposits to northwest.  Silica-carbonate veins are interpreted as altered basalt dikes that intrude graywackes and argillite of the Cretaceous Kuskokwim Group.  Approximately 3,000 m of underground workings on five levels as of 1963.	Alaska

P04-13	Wolf Mountain	P	04	13	62 20 00N	161 29 15W	62.3333333333333	-161.4875	6220'N	16129'W	Felsic plutonic U	U, Th, As, Nb, Mo, REE	Hg	150 meter wide zone at Little Lockwood Creek with 180 ppm U, 130 ppm Th, 290 ppm As, 0.02 % Mo, 175 ppm Nb, about 0.10 % REE, and 0.01% Hg	Southwestern Kuskokwim Mountains	T.K. Bundtzen, written commun., 1992, Bruce Hickok and T. Turner, written commun., 1987, 1989	A circular field of andesite, dacite, and pyroclastic tuff has collapsed on an underlying composite pluton composed of granite, alaskite, and adamellite; radiometrically dated (K-Ar) at 57 Ma.  This caldera complex intrudes and overlies oceanic stratigraphy of the Koyukuk terrane.  Extensive ferricrete gossan and ferricrete breccias occur, mainly within high level portions of the Wolf Creek stock at  1) structurally controlled (fault) zones on Little Lockwood Creek,  2) northeast-trending fractures(?) on Tom Gray Creek, and  3) disseminated near pluton-volcanic contacts throughout the caldera complex.  The only sulfides recognized in the field are arsenopyrite and cinnabar.  Monazite and bastinite were also recognized.  Metallogeny similar to that described in Sischu Volcanic field in northeast Medfra quadrangle (Sischu Creek deposit, WC21).  	Alaska

P04-14	Arnold prospect 	P	04	14	61 52 00N	161 58 00W	61.8666666666667	-161.966666666667	6152'N	16158'W	Granitoid-related Au	Au,Ag	W,Cu,Mo	Grab samples with up to 97 g/t and 100 g/t Ag	Southwestern Kuskokwim Mountains	T.K. Bundtzen, written commun., 1991	Consists of an approximate east-west-trending system of low sulfide polymetallic veins system that contain gold in a quartz and carbonate gangue. The sulfide minerals, that comprise less than one percent of the deposit, are disseminated chalcopyrite, molybdenite, galena, and tetrahedrite. Ore zone extends along strike for least 400 meters and ranges from 0.5 to 2m thick.  The vein system occurs in or near sheared alaskite sills. A distinctive albite rhyolite dike or sill parallels the main vein system. The sills intrude Neocomian (early Early Cretaceous) greenstone derived from tholeiite metabasalt and meta-andesite. The deposit extends extends along strike for least 400 meters and ranges from 0.5 to 2 m thick. Abundant carbonate alteration occurs adjacent to the main polymetallic veins. Molybdenum anomalies occur in soils, and Mo averages about 80 ppm in the veins. Deposit is interpreted as forming from late stage hydrothermal fluid derived from Late Cretaceous or early Tertiary alaskite.  	Alaska

P04-15	Fortyseven Creek	P	04	15	61 07 00N	158 15 00W	61.1166666666667	-158.25	6107'N	15815'W	Polymetallic vein(?)	Au, W		Grab samples with up to 17.2 g/t Au	Southwestern Kuskokwim Mountains	Cady and others, 1955; Thomas E. Smith, written commun., 1985	Pyrite, arsenopyrite, gold, wolframite, jamesonite, Au-Ag tellurides, and scheelite in numerous, discontinuous quartz veins and pods in mineralized zone about 1.6 km long and 153 to 256 m wide.  Veins trend northeast and dip from 50 west to 70 east.  Several stockwork zones.  Mineralized zone locally sheared and intruded by altered rhyolite dikes.  K-Ar age of 57 Ma for white mica in veins.  Subsurface drilling shows zone in lithic sandstone about 300 m wide by 4,000 m long, east of Holitna fault.  Veins occur in contact metamorphosed siltstone and sandstone of the Kuskokwim Group.	Alaska

P04-16	Taylor Mountains	P	04	16	60 52 00N	157 40 00W	60.8666666666667	-157.666666666667	6052'N	15740'W	Hg-Ag epithermal vein(?)	Hg, Au	As, Ag	No data	Southwestern Kuskokwim Mountains	Cady and others, 1955; Thomas K. Bundtzen, written commun., 1984	Disseminated arsenopyrite, cinnabar, pyrite, and minor gold in Late Cretaceous rhyolite over an area at least 200 by 300 m.  Sparse sulfide concentrations in quartz-tourmaline veinlets in rhyolite.  Sparse massive pyrite along contacts between lithic sandstone and rhyolite.  Pyrite, cinnabar, and stibnite in nearby placer deposits in Taylor Creek.	Alaska

P04-17	Cinnabar Creek	P	04	17	60 46 00N	158 46 00W	60.7666666666667	-158.766666666667	6046'N	15846'W	Hot-spring Hg	Sb, Hg		Produced about 525 flasks of Hg from selected high-grade ore	Southwestern Kuskokwim Mountains	Cady and others, 1955; Sainsbury and MacKevett, 1965	Stibnite and cinnabar in shear zones, disseminations, irregular veinlets, and breccias in or near silica-carbonate dikes interpreted as hydrothermally altered basalt dikes.  Dikes intrude argillite and other clastic rocks of the late Paleozoic to Cretaceous Gemuk Group.  Most sulfides in altered sedimentary rocks.  Deposit includes Cinnabar Creek shear zone, Lucky Day, and Landau areas.  Ore chutes at Cinnabar exceed 40 m long and 0.5 m wide.  Several periods of small-scale mining; the last in the early 1970's from surface trenches.  	Alaska

P04-18	Sleitat	P	04	18	60 03 00N	157 05 00W	60.05	-157.083333333333	6003'N	15705'W	Tin Greisen and Skarn	Sn, Ag, W, As		Inferred reserves of 25 million tonnes grading 0.20 % Sn with minor Ag, W	Southwestern Kuskokwim Mountains	Burleigh, 1991; Farnstrom, 1991; T.K. Bundtzen and Paul Layer, written commun., 1991	Cassiterite, topaz, and quartz greisen accompanied by lesser amounts of arsenopyrite, pyrite, wolframite, argentite, chalcopyrite, and galena.  Two largest greisens form resistant, irregular, east-west trending, vertically dipping dike-like features that protrude through less resistant host granite.  Greisens vary from less than a meter wide and 20-30 meters long to zones 20-50 meters wide and 1200 meters long.  Most greisens occur at contact between biotite-muscovite granite and muscovite granite phases of Sleitat pluton.  Some mineralization in surrounding hornfels aureole.  Pluton crops out across an area of 1.5 km2.  A much larger 20 km2 hornfels aureole indicates a much larger intrusive mass underlies prospect area.  Pluton intrudes Mesozoic flysch of Kahiltna Terrane or Kuskokwim Group.  About 735 meters of diamond drilling completed; best hole yielded 29 meters of 1.56% Sn and 28 ppm Ag.  Sleitat is probably correlative with other stanniferous plutons of 55-60 Ma McKinley sequence.  Ar 40-39 age determinations indicate 58-59 Ma ages for granite and 56-57 Ma for greisen event.	Alaska

P04-19	Fox Hills	P	04	19	62 48 00N	158 54 00W	62.8	-158.9	6248'N	15854'W	Porphyry Mo	Mo		Selected rock-chip samples contain from 0.01 to 2.0% MoS2 and up to 11 g/t Ag; 	Southwestern Kuskokwim Mountains	Miller and Bundtzen, 1994; Nokleberg and others, 1995a.	Occurs in an alkali granite pluton that contains a central phyllic and sericitic alteration zone rimmed by a thin, 50-m-wide argillic zone. In the southern part of the alteration halo are molybdenite-quartz veinlets that strike 335 in a 120 by 100 m zone. The alkali granite pluton has a surface area of about 8 km2, contains alkali amphibole, and intrudes the Late Cretaceous Kuskokwim Group in the Fox Hills, about 60 km west of Flat (Fig. 7). The phyllic and sericitic alteration zone is about 2 km2 in area and occurs in the western part of the pluton. The Fox Hills alkali granite has a K-Ar amphibole age of 62.9 Ma .	Alaska

P04-20	Molybdenum Mountain 	P	04	20	62 05 00N	158 48 00W	62.0833333333333	-158.8	6205'N	15848'W	Porphyry Mo	Mo		Selected rock samples from the Molybdenum Mountain stock contain up to 5.0% MoS2. 	Southwestern Kuskokwim Mountains	T.K. Bundtzen, unpublished data, 1987; Nokleberg and others, 1995a.	Consists of a stockwork of vein quartz containing massive and disseminated molybdenite, galena, and pyrite in the Molybdenum Mountain (felsic) stock, a small hypabyssal intrusion of 2 km2 area that occurs in an area about 45 km northeast of Aniak. Alteration is mainly silicic and sericitic. A large, elongate contact metamorphic aureole surrounds the Molybdenum Mountain stock and several smaller intrusions that occur about 4 to 6 km to the northeast. The stock intruded pervasively altered, Late Cretaceous flysch of the Kuskokwim Group in a large shear zone that is a splay of the Iditarod-Nixon-Fork Fault, a major dextral-slip Cenozoic fault in west-central Alaska. A K-Ar white mica age of 60.9 Ma has been obtained from the stock.	Alaska

P04-21	Beaver Mountains	P	04	21	62 54 00N	156 58 00W	62.9	-156.966666666667	6254'N	15658'W	Porphyry Cu-Au	Cu, Au, Ag		Cirque prospect: Chip-channel samples range up to 21.0% Cu, 1,000 g/t Ag, 200 ppm Sn, and 1 g/t Au. Tolstoi prospect: scattered assay values range up to 10.0% Cu, 995 g/t Ag, 2.0% As, 0.6 g/t Au, 500 ppm Sb, and 39 ppm Bi.	Southwestern Kuskokwim Mountains	Bundtzen and Laird, 1982; Miller and Bundtzen, 1994; Nokleberg and others, 1995z.	Consists of a variety of mineralized vein stockworks, replacements, and tourmaline breccias that contain anomalous Au, Ag, Cu, Pb, W, Sn, Nb, and As. The deposit occurs in Late Cretaceous and early Tertiary volcanic and plutonic rocks in the Beaver Mountains, about 60 km west of McGrath. The major lode prospects are found in a 15 km2 area centered on the Cirque and Tolstoi prospects (Bundtzen and Laird, 1982) that are also called the South Quartz Zone area by Szumigala (1993). The Cirque deposit consists of a series of parallel tourmaline-axinite-sulfide fracture fillings that occur in the cupola of a quartz syenite phase of the Beaver Mountains pluton. The Tolstoi deposit consists of three, pipe-shaped, sulfide-bearing, tourmaline-bearing breccia zones that occur in another part of the cupola of the Beaver Mountains pluton. These near-vertical zones, possibly breccia pipes, appear to be enveloped in a larger, 2 km2 potassic alteration halo.  Szumigala (1993) interprets the porphyry copper-gold deposits in the Beaver Mountains as occurring in veins that are peripheral to classic porphyry Cu systems. A K-Ar biotite age of 70.3 Ma was obtained by Bundtzen and Laird (1982) from quartz syenite near the northern margin of the Beaver Mountains pluton.	Alaska

P04-22	Donlin Creek 	P	04	22	62 18 00N	158 24 00W	62.3	-158.4	6218'N	15824'W	Porphyry Au	Au		Trenching and drilling indicate that the seven ore bodies at Carolyn, Snow, Queen, Rochelieu, Upper Lewis, Middle Lewis, and Lower Lewis contain an inferred reserve of 3,871,025 tonnes grading 3.15 g/t Au 12,225 kg gold. Exhaustive mineral resource investigations have been completed by private mining firms.	Southwestern Kuskokwim Mountains	Mertie, 1936; Decker and others, 1984; Miller and Bundtzen, 1994; R.M. Retherford and J. McAtee, written commun., 1994; Nokleberg and others, 1995a. 	Consist of seven distinct prospects that occur along strike in an approximately 6-km-long dike and sill swarm. The prospects consist of quartz-stibnite veins in porphyry and adjacent silicified sandstone, quartz-gold replacement of phenocrysts, and thick quartz veins with disseminated quartz-sulfide zones that occur along shears and in stockworks. The sulfide minerals are mainly pyrite, stibnite, cinnabar, arsenopyrite, and sulfosalt minerals. Alteration is mainly argillic, phyllic, silicic, carbonate, and dickite, and occurs along linear shears and faults rather than as concentric halos. Au deposition accompanied As deposition; other metals show low correlation coefficients with Au. 	Alaska

P04-23	Vinesale Mountain	P	04	23	62 36 00N	156 08 00W	62.6	-156.133333333333	6236'N	15608'W	Porphyry Au	Au		Based on about 6,000 m of drilling, a central zone contains a reserve of about 16 million tonnes grading 2.14 g/t Au and accessory Ag and Sb, or about 31,000 kg of gold. 	Southwestern Kuskokwim Mountains	Bundtzen, 1986; DiMarchi, 1993; Nokleberg and others, 1995a.	Consists of Au-Ag-Sb-Pb-As sulfide minerals that occur as disseminations, and in breccias, dolomite veins, and segregations. Mafic minerals are altered by silicification, sericitization, and propylitic replacements. The highest gold concentrations in the central zone of the deposit occur in areas of intense sericite and silica alteration. Over ninety percent of the gold is contained in sulfides and sulfosalt minerals of arsenic and antimony. Correlation coefficients are highest between Au and As (0.81). Deposit  hosted in various phases of the Vinasale pluton, a multiphase, 6 km2 intrusion composed of monzonite, quartz monzonite, and granite porphyry that intruded the Late Cretaceous Kuskokwim Group. A K-Ar biotite age of 69.0 Ma from a quartz monzonite phase of the Vinasale Mountain pluton is described by Bundtzen (1986). 	Alaska

P05-01	Sischu Creek	P	05	01	63 58 00N	153 17 00W	63.9666666666667	-153.283333333333	6358'N	15317'W	Felsic plutonic U	U, Th		Grab samples with 0.002 to 0.007% U and 0.011 to 0.013% Th	Southwestern Kuskokwim Mountains	Miller and others, 1980; Patton and Moll, 1983	Strongly radioactive U- and Th-rich Late Cretaceous and early Tertiary porphyritic sanidine rhyolite and quartz porphyry flows in two belts, each about 1.5 to 3 km wide, 6 km long.  Rhyolite flows exhibit 400 to 600 cps on hand-held scintillometer.  Associated rocks include mafic and intermediate volcanic piles, volcanic-plutonic complexes, silicic dikes, sills, domes, and flows, and numerous granitic stocks and plugs of 60 to 70 Ma (K-Ar).	Alaska

P05-02	Medfra	P	05	02	63 40 00N	154 04 00W	63.6666666666667	-154.066666666667	6340'N	15404'W	Fe skarn	Fe, Cu, Zn, Au		Estimated 12,000 cubic meters grading 85% Fe2O3, with traces of Cu, Au	Southwestern Kuskokwim Mountains	Patton and others, 1980, 1984	Magnetite, very minor chalcopyrite, and sphalerite in epidote and garnet skarn.  Irregular, elliptically-shaped skarn body in Ordovician dolomitized limestone of the lower Paleozoic Telsitna Formation adjacent to Late Cretaceous granite stock.  Computer modeling of magnetic survey suggests 40,000 to 50,000 tonnes of magnetite.	Alaska

P05-03	Reef Ridge	P	05	03	63 29 00N	154 10 00W	63.4833333333333	-154.166666666667	6329'N	15410'W	Southeast Missouri Pb-Zn	Zn, Pb		Grab samples with up to 20% Zn, 5% Pb, minor Ag.  Estimated  to contain about 181,000 tonnes of 15% combined Zn and Pb	Mystic	Harold Noyes, written commun., 1984.	Stringers of brown sphalerite and minor galena in hydrothermal breccia in carbonate rocks of the Silurian and Devonian Whirlwind Creek Formation, part of Nixon Fork terrane.  Minimum strike length of 2,000 m and up to 15 m thick.  Sulfides pinch and swell along strike.  Best known of ten similar nearby occurrences. 	Alaska

P05-04	Nixon Fork-Medfra	P	05	04	63 14 00N	154 47 00W	63.2333333333333	-154.783333333333	6314'N	15447'W	Cu-Au skarn	Au, Cu, Ag, Bi, Sn, W, Th		Produced about 1.24 to 1.87 million g Au, and undisclosed Cu and Ag. Reserves of 85,600 tonnes grading 49.0 g/t Au with minor Bi.	Southwestern Kuskokwim Mountains	Martin, 1921; Brown, 1926; Jasper, 1961; Herreid, 1966; Bundtzen and Gilbert, 1983b; C. Puchner, written commun., 1991; Bundtzen and others, 1996.	Chalcopyrite, pyrite, bornite, and native bismuth occur as irregular replacement bodies in skarns in recrystallized Ordovician limestone of the Telsitna Formation.  Gangue minerals include diopside, garnet, plagioclase, epidote, and apatite.  Oxidized actinolite skarn with limonite, quartz, malachite, pyrite, and gold.  Skarns mainly in fractures up to 1 to 4 m wide and 50 m long, usually within 40 m of intrusive contact with Late Cretaceous monzonite.  A few skarns in roof pendants overlying pluton.  The monzonite pluton about 10 square km near the Nixon-Iditarod fault.  Additional smaller skarn veinlets in fault controlled areas away from main skarn bodies.  Extensive sericitic alteration locally.  Most of ore from zone of secondary enrichment that formed during alteration of primary skarn by groundwater.  Lower grade sulfide-rich ore at depths greater than 60 m.  About 1,300 m of underground workings to depth of 170 m.  Includes Crystal, Garnet, High Grade, Main, Mespelt, Recreation, and Whalen deposits.	Alaska

P05-05	Candle	P	05	05	62 51 00N	155 48 00W	62.85	-155.8	6251'N	15548'W	Polymetallic vein or porphyry Cu?	Cu, Pb, Ag		Grab samples averaging 280 g/t Cu, 185 g/t Pb, 6.8 g/t Ag	Southwestern Kuskokwim Mountains	Bundtzen and Laird, 1983a, b; Thomas K. Bundtzen, written commun., 1984, 1990	Cinnabar, arsenopyrite, and quartz in stockworks in altered, sericite, late Cretaceous monzonite near intrusive contact with overlying altered olivine basalt.  Local quartz-chalcopyrite disseminations in the pluton.  Recent exploration indicates low grade auriferous quartz vein stockwork in monzonite near faulted contact with basalt.  Zone up to 200 m wide and 700 m long.  Central part of basalt field contains 300 by 500 m zone of disseminated sulfides.  Monzonite in creek valley is weakly mineralized with gold and mercury within stockwork quartz veinlets.	Alaska

P05-06	Stampede	P	05	06	63 45 00N	150 25 00W	63.75	-150.416666666667	6345'N	15025'W	Sb-Au vein	Sb		Estimated 410,000 tonnes with 10.5% Sb, minor Ag, Zn, and Au.  Produced 1,570 tonnes ore	East-Central Alaska	Barker, 1963a; Bundtzen, 1981, 1983a; Thomas K. Bundtzen, written commun., 1984	Quartz-carbonate fissure veins with stibnite, and minor pyrite and sphalerite in pods and kidneys.  Massive stibnite zones up to 5 m wide.  Extensive vein system localized in a 5 km long, northeast-trending fault system.  Veins formed before, during, and after several periods of movement on fault.  Paragenetic sequence, from older to younger:  pyrite, sphalerite, and stibnite.  Fault system cuts the Spruce Creek sequence which is composed of middle Paleozoic or older metasedimentary and metavolcanic rocks.  Production from 1937 to 1970.  About 1,000 m of underground workings on two levels.	Alaska

P05-07	Spruce Creek	P	05	07	63 35 00N	151 35 00W	63.5833333333333	-151.583333333333	6335'N	15135'W	Polymetallic vein	Au, Ag, Pb, Zn, Sb		Estimated 77,000 tonnes with 2.4 g/t Au, 276 g/t Ag, and 2.5% combined Pb, Zn, Sb	East-Central Alaska	Bundtzen, 1981, 1983a; Thomas K. Bundtzen, written commun., 1984	Quartz-carbonate fissure veins with galena, sphalerite, arsenopyrite, and gold.  Veins occur along northeast-striking, steeply dipping fault zones in the Spruce Creek sequence composed of middle Paleozoic or older metasedimentary and metavolcanic rocks.	Alaska

P05-08	Banjo	P	05	08	63 34 00N	150 44 00W	63.5666666666667	-150.733333333333	6334'N	15044'W	Polymetallic vein	Au, Ag, Pb, Zn, Sb	Cu	Estimated 160,000 tonnes with 13.4 g/t Au, 123 g/t Ag, 1.5% combined Pb, Zn, Sb	East-Central Alaska	Bundtzen, 1981, 1983a; Thomas K. Bundtzen, written commun., 1984	Quartz-carbonate fissure veins with arsenopyrite, pyrite, gold, and minor scheelite.  Veins occur along northeast-southwest-striking, steeply dipping fault zones within the Spruce Creek sequence composed of middle Paleozoic or older metasedimentary and metavolcanic rocks of Yukon-Tanana terrane.	Alaska

P05-09	Quigley Ridge	P	05	09	63 33 00N	150 45 00W	63.55	-150.75	6333'N	15045'W	Polymetallic vein	Ag, Au, Pb, Zn		Estimated 380,000 tonnes with up to 1,300 g/t Ag, 4.8 g/t Au, 6.4% Pb, and 2.3% Zn	East-Central Alaska	Bundtzen, 1981, 1983a; Thomas K. Bundtzen, written commun., 1984	Quartz-carbonate fissure veins with galena, sphalerite, tetrahedrite, pyrite, chalcopyrite, and siderite.  Paragenetic sequence, from older to younger:  arsenopyrite, pyrite, base-metal sulfides, Ag sulfosalts, stibnite, and covellite.  Locally contain Ag and Pb sulfosalts.  Veins occur along northeast-striking, steeply dipping fault zones in the Spruce Creek sequence composed of middle Paleozoic or older, metavolcanic and metasedimentary rocks.	Alaska

P05-10	Slate Creek, Eagles Den, Caribou Creek	P	05	10	63 25 00N	151 12 00W	63.4166666666667	-151.2	6325'N	15112'W	Sb-Au vein	Sb	Ag, Zn	Estimated 64,000 tonnes grading 12.0% Sb, with minor Ag and Zn	East-Central Alaska	Bundtzen, 1981; Thomas K. Bundtzen, written commun., 1984	Quartz-carbonate fissure veins mineralized mainly with stibnite, and mostly free of other sulfides common to district.  Veins occur along northeast-striking, steeply dipping fault zones that cut metasedimentary and metavolcanic rocks of middle Paleozoic or older Yukon-Tanana terrane.	Alaska

P05-11	Boulder Creek (Purkeypile)	P	05	11	62 53 00N	152 08 00W	62.8833333333333	-152.133333333333	6253'N	15208'W	Sn greisen(?)	Sn		Contains an estimated 136,000 kg Sn.  Grab samples with up to 18% Sn, 7,900 g/t Ag	Southern Alaska	Maloney and Thomas, 1966; Conwell, 1973; Reed and others, 1978; Warner, 1985	Disseminated cassiterite and sulfides in clusters of narrow, open-space fracture fillings, suggestive of stockwork deposit.  Deposit occurs in calc-silicate rock, quartzite, and argillite approximately 100 to 200 m north of Tertiary biotite granite, part of the lower Tertiary McKinley plutonic sequence.	Alaska

P05-12	Shellabarger Pass	P	05	12	62 40 00N	152 30 00W	62.6666666666667	-152.5	6240'N	15230'W	Besshi massive sulfide	Cu, Ag, Fe, Zn		Estimated several hundred  thousand tonnes of unknown grade.  Up to 5% Cu; average of about 2% Cu, 1% Zn	Mystic	Reed and Eberlein, 1972; Bundtzen and Gilbert, 1983	Very fine grained mixture of mainly pyrite and marcasite with lesser sphalerite, chalcopyrite, galena, and pyrrhotite in a gangue of siderite, calcite, quartz, and dolomite.  Sulfides and gangue occur in massive, lenticular sulfide bodies, as replacements of carbonate-rich beds, and as fracture fillings, mainly in chert and siltstone.  Host rocks are Triassic and(or) Jurassic age; and consist of lower sequence of chert, dolomite, siltstone, shale, volcanic graywacke, conglomerate, aquagene tuff, and upper sequence of pillow basalt, agglomerate, and breccia.  At least six individual sulfide bodies.  Highest chalcopyrite concentrations in basal parts of bodies.  Minor sphalerite in or near hanging walls.  Main sulfide bodies may be proximal to basaltic flow fronts.  Extensive hydrothermal alteration in footwall; rare to absent in hanging wall.  High background Cu values of 250 to 300 g/t.	Alaska

P05-13	Tin Creek	P	05	13	62 23 00N	153 38 00W	62.3833333333333	-153.633333333333	6223'N	15338'W	Cu-Pb-Zn skarn	Pb, Zn, Cu		Estimated 230,000 tonnes with 16% combined Pb and Zn	Southern Alaska	Herreid, 1966; Reed and Elliott, 1968a, b; Bundtzen and Gilbert, 1983; Bundtzen and others, 1982; Szumigala, 1984	Pyroxene-rich skarn with abundant sphalerite and minor chalcopyrite, and garnet skarn with chalcopyrite and minor sphalerite; and locally abundant epidote and amphibole.  Pyroxene skarn distal, and garnet skarn proximal to extensive Tertiary granodiorite dike swarm in mid-Paleozoic marble.  Skarns form small, discontinuous bodies up to 3 m wide along dikes, as mantos in marble, and as irregular bodies along thrust and high-angle faults.	Alaska

P05-14	White Mountain	P	05	14	62 10 00N	154 51 00W	62.1666666666667	-154.85	6210'N	15451'W	Carbonate-hosted Hg(?)	Hg		Chip samples contains 5 to 30% cinnabar.  Produced about 3,500 flasks of Hg.	Southern Alaska(?)	Sainsbury and MacKevett, 1965; Brian K. Jones, written commun., 1984; Thomas K. Bundtzen, written commun., 1984	Cinnabar in fault zones between Ordovician limestone and shale along belt about 1 km wide and 3 km long on northwest side of Farewell fault.  In southern zone, cinnabar occurs as thin crystalline coatings in brecciated dolomite, as coatings on breccia fragments, and as irregular veinlets.  In central zone, cinnabar is more irregular and occurs in silicified limestone and dolomite.  In northern zone, rich cinnabar masses occur on both sides of major fault between middle Paleozoic shale and limestone.  One area in north zone contains a massive cinnabar body up to 350 m long and 10 to 15 cm thick.  Locally cinnabar occurs in small karst-like caverns in dolomitized limestone.  Gangue minerals consist of dolomite, chalcedony, calcite, dickite, and limonite.  Production from 1964 to 1974 when mined from a series of open pits.	Alaska

P05-15	Chip-Loy	P	05	15	62 14 00N	154 20 00W	62.2333333333333	-154.333333333333	6214'N	15420'W	Gabbroic Ni-Cu(?)	Ni, Co, Cu		Estimated 9,100 tonnes of 1% Ni, 0.1% Co	Unassigned	Herreid, 1968; Gilbert and Solie, 1983; Bundtzen and others, 1985	Massive to disseminated pyrrhotite, bravoite, and chalcopyrite in irregular, steeply dipping layer; occurs along contact between diabase and Ordovician shale.  Other nearby Ni-Co sulfide deposits occur along contacts between diabase dikes.	Alaska

P05-16	Rat Fork, Sheep Creek	P	05	16	62 14 00N	153 48 00W	62.2333333333333	-153.8	6214'N	15348'W	Cu-Pb-Zn skarn	Cu, Zn, Pb		Grab samples with up to 3% Cu and 10% combined Zn, Pb	Southern Alaska	Herreid, 1968; Reed and Elliott, 1968a, b; Bundtzen and others, 1982; Szumigala, 1987	Large slivers of Cu- and Zn-rich skarn between Tertiary granodiorite dikes in a 3-km-wide dike swarm that cuts lower Paleozoic marble.  Johannsenite-sphalerite skarn in marble, and chalcopyrite-rich garnet endoskarn in dikes.  Local Ag-rich galena vein in marble about 0.5 km north of dike swarm.  Dikes trend east-west; skarn up to 25 m wide.	Alaska

P05-17	Bowser Creek	P	05	17	62 11 00N	153 40 00W	62.1833333333333	-153.666666666667	6211'N	15340'W	Pb-Zn skarn	Ag, Pb, Zn		Higher grade:  estimated 14,000 tonnes with 1,300 g/t Ag, and up to 10% combined Pb and Zn.  Lower grade:  estimated 272,000 tonnes with 20% Pb and Zn, and 100 g/t Ag	Southern Alaska	Bundtzen and others, 1988; Szumigala, 1987	Pyrrhotite, sphalerite, galena, and chalcopyrite in a hedenbergite-johannsenite endoskarn occurring in marble adjacent to felsic dike that cuts an early Tertiary granitic pluton.  Some veins with Ag-rich galena and pyrrhotite occur within marble adjacent to skarn.  Small Zn- and Cu-rich stockwork veinlets in plutons, and disseminated sulfides in plutons and endoskarn occur nearby.	Alaska

P05-18	Gagaryah	P	05	18	61 49 00N	154 28 00W	61.8166666666667	-154.466666666667	6149'N	15428'W	Sedimentary exhalative barite (Pb-Zn)	Ba		Inferred reserves of 2.3 million tonnes containing 51% barite	Mystic	Bundtzen and Gilbert, 1991	Nodular, laminated, composite, and massive, light gray barite in Frasnian (early Late Devonian) shale, limestone and minor chert of Mystic Terrane.  Deposit has minimum strike length of 640 meters, an average thickness of 20 meters, and estimated down-dip extension of 300 meters.  Gagaryah deposits contains slightly elevated levels of silver vanadium, and strontium (as celestite), but no lead or zinc.  Sulfide isotopic analyses of +20 and +24 determined from nodular and massive barite respectively.  Barite was deposited syngenetically into host shale basin with barite rapidly precipitating from low temperature hydrothermal fluids distal from exhalative vents.	Alaska

P05-19	Bonanza Hills	P	05	19	60 45 00N	154 30 00W	60.75	-154.5	6045'N	15430'W	Polymetallic vein and Porphyry Cu	Ag, Cu, Pb, Au		At Main Saddle estimated 45,000 tonnes grading 81 g/t Ag, 0.15% Cu, 0.67% Pb, and 0.15 g/t Au	Southern Alaska	Eakins and others, 1978; Thomas K. Bundtzen, written commun., 1984; Nelson and others, 1985	Main Saddle Deposit: tetrahedrite, arsenopyrite, galena, and chalcopyrite in quartz-limonite vein up to 3 m wide and 150 m long.  Vein occurs in contact-metamorphosed dacite flow and sandstone sequence near Late Cretaceous, two-mica, hypabyssal, granite pluton.  VABM Trail and Bonanza Deposits: stibnite, arsenopyrite, and gold in en echelon veinlets adjacent to dacite porphyry and quartz monzonite plutons.  Extensive sericite and silicic alteration of plutonic rocks.  Plutons intrude Lower Cretaceous shale and sandstone, part of regionally extensive Upper Jurassic and Lower Cretaceous flysch.	Alaska

P05-20	Glacier Fork	P	05	20	60 51 00N	153 12 00W	60.85	-153.2	6051'N	15312'W	Cu-Zn skarn	Cu, Au	Zn, Ag	Chip samples contain 0.76% Cu, 3.4% Zn, 0.38 g/t Au, 20g/t Ag	Alaska Peninsula	Nelson and others, 1985	Layers and veinlets of disseminated and massive pyrrhotite, chalcopyrite, arsenopyrite, and sphalerite in iron-poor, garnet-rich skarn.  Skarn occurs in large roof pendant over granitic pluton. 	Alaska

P05-21	Miss Molly (Hayes Glacier)	P	05	21	60 51 00N	151 48 00W	60.85	-151.8	6051'N	15148'W	Porphyry Mo	Mo		Grab and chip samples with up to 0.38% Mo, 0.16% Zn	Southern Alaska	Fernette and Cleveland, 1984	Quartz veins with medium- to coarse-grained molybdenite, pyrite, and local fluorite.  Regularly spaced, subparallel, veins 2 to 10 cm wide are spaced 2 to 10 m apart.  Veins occur in two zones about 545 m long and up to 150 m wide in early Tertiary leucocratic, equigranular biotite granite stock.  Veins locally fill joints and less commonly shears.  Zones of hydrothermal alteration up to 0.3 m wide are marked by sericite and pyrite and occur adjacent to veins.  Granite stock intrudes siltstone in an Upper Jurassic and Lower Cretaceous flysch unit.  Granitic plutons nearby, yield K-Ar ages of 56 to 59 Ma. 	Alaska

P05-22	Kijik River	P	05	22	60 17 00N	154 15 00W	60.2833333333333	-154.25	6017'N	15415'W	Polymetallic vein and porphyry Cu	Cu, Mo		Grab samples with up to 0.25% Cu, and 0.17% Mo.  Estimated 91 million tonnes	Southern Alaska	Eakins and others, 1978; Nelson and others, 1985; Thomas K. Bundtzen, written commun., 1984	Large area of low-grade, disseminated sulfides in, and adjacent to early Tertiary dacite porphyry.  Distinctive orange gossan over a 3 km2 area with extensive stockwork, and zones of sericite and sulfides.  Extensive propylitic and silicic alteration of dacite porphyry.  Early Tertiary dacite porphyry intrudes older volcanic rocks.	Alaska

P05-23	Kasna Creek (Kontrashibuna)	P	05	23	60 13 00N	154 05 00W	60.2166666666667	-154.083333333333	6013'N	15405'W	Cu-Fe skarn	Cu	Au, Ag, Zn, Fe	Chip samples averaging 0.95%  Cu, 27% Fe, and traces of Au and Ag.  Grab samples with up to 0.25% Zn.  Estimated 9.1 million tonnes grading 1% Cu	Alaska Peninsula	Warfield and Rutledge, 1951; Reed and Lanphere, 1969; Eakins, 1970	Skarn bodies contain specular hematite and lesser magnetite and chalcopyrite in amphibole-chlorite-calcite-quartz gangue that replaces Upper Triassic dolomite and limestone.  Skarn bodies occur parallel to bedding and occur in a zone about 320 m long and 700 m wide adjacent to Jurassic tonalite.  Tuffs, mafic volcanic rocks, and agglomerate associated with limestone.	Alaska

P05-24	Magnetite Island  (Tuxedni Bay)	P	05	24	60 14 00N	152 51 00W	60.2333333333333	-152.85	6014'N	15251'W	Fe skarn	Fe, Ti		Up to several thousand tonnes in zones with 20 to 75% magnetite	Alaska Peninsula	Grantz, 1956; Detterman and Hartsock, 1966	Two magnetite-bearing skarn bodies replace upper Paleozoic to lower Mesozoic marble.  Skarn bodies occur along northeast-striking faults in Upper Triassic marble and associated sedimentary and volcanic rocks adjacent to Jurassic quartz diorite pluton.  Disseminated magnetite in hornfels of eastern deposit.  Massive magnetite and garnet between marble hanging wall and hornfels footwall in western deposit.	Alaska

P05-25	Johnson Prospect	P	05	25	60 07 00N	152 57 00W	60.1166666666667	-152.95	6007'N	15257'W	Kuroko massive sulfide	Au, Zn, Cu, Pb		Estimated resource of 16,795 kg gold and 127,000 tonnes Zn; includes 453,500 tonnes grading 19 g/t Au and 9.0% Zn	Talkeetna Mountains-Alaska Range	R. L. Detterman, oral commun., 1984; Steefel, 1987; Madelyn Mollholyn, written commun., 1988; J. Proffett, written commun., 1991	Stockworks of quartz-sulfide veins and massive sulfide lenses with chalcopyrite, pyrite, sphalerite, galena, and gold.  Stockwork occurs in a discordant, pipe-like body of silicified volcanic rocks.  Veins also contain chlorite, sericite, anhydrite, and barite alteration minerals.  Deposit occurs in volcaniclastic, pyroclastic, and volcanic rocks, part of the Portage Creek Agglomerate Member of the Lower Jurassic Talkeetna Formation.  Deposit may represent deposition of sulfides directly over capped submarine vent system during Jurassic volcanic cycle.  Nearby Late Jurassic quartz diorite and quartz monzonite.	Alaska

P05-26	Von Frank Mountain 	P	05	26	63 38 00N	155 04 00W	63.6333333333333	-155.066666666667	6338'N	15504'W	Porphyry Cu-Ag	Cu, Ag		Average grade of 0.5 to 35 g/t Au and from 0.05% to 0.45% Cu; one drill hole intercepted about 45 m grading 1.2 g/t Au and 0.08% Cu.	Southwestern Kuskokwim Mountains	J. DiMarchi, written. commun., 1994; Nokleberg and others, 1995a.	Occurs about 100 km northeast of McGrath and consists of a stockwork in a quartz diorite and augite-rich, biotite granodiorite. These rocks occur in a down-dropped structural block along the southern limit of a volcanic-plutonic complex exposed at Von Frank Mountain. The stockwork consists of chalcopyrite, arsenopyrite, minor molybdenite, and free gold in quartz-carbonate veins in a cupola of the intrusive system. Alteration minerals include sericite, silica, and dolomite replacement zones that are similar to the Chicken Mountain porphyry Au deposit (Bundtzen and others, 1992). A K-Ar isotopic mineral age of 69.9 Ma was obtained from granitoid plutons north of the prospect (Moll et al., 1981). 	Alaska

P06-01	Sheep Creek	P	06	01	63 54 00N	148 17 00W	63.9	-148.283333333333	6354'N	14817'W	Kuroko massive sulfide?	Zn, Pb, Ag, Sn		Grab samples contain up to 15% combined Pb and Zn, and 102 g/t Ag; zones up to 1 m wide with 1% Sn	Alaska Range and Yukon-Tanana Upland	Gilbert and Bundtzen, 1979; Thomas K. Bundtzen, written commun., 1985	Fine-grained sphalerite, galena, and pyrite in massive lenses in siliceous phyllite and metaconglomerate of the Precambrian or Paleozoic Keevy Peak Formation.  Sulfide zone extends along strike for 300 m, and vertically for 200 m.  Sulfide lenses isoclinally folded; may be distally associated with tuffaceous chlorite schist and metamorphosed lapilli tuff.  	Alaska

P06-02	Anderson Mountain	P	06	02	63 48 00N	147 57 00W	63.8	-147.95	6348'N	14757'W	Kuroko massive sulfide?	Cu, Pb, Zn, Ag		Up to 19% Cu, up to 5% Pb, 28% Zn, and 171 g/t Ag.	Alaska Range and Yukon-Tanana Upland	Gilbert and Bundtzen, 1979; Curtis J. Freeman, written commun., 1984; T.K. Bundtzen, written commun., 1984	Massive sulfide layers with pyrite, chalcopyrite, galena, sphalerite, enargite, and arsenopyrite in gangue of quartz, sericite, chlorite, calcite, barite and siderite.  Hosted in metamorphosed marine tuffaceous rhyolite and metamorphosed calcareous clastic rocks correlated with the Moose Creek Member of the Mississippian Totatlanika Schist.  Numerous high-angle faults.  Sulfide beds appear to lie on irregular paleosurface in footwall.  Domal sulfide accumulations at top of layers.  Absence of footwall alteration and stringer mineralization suggests off-vent deposition.  High geochemical values of As, Sb, Hg, and W may be derived from older schist basement.	Alaska

P06-03	WTF, Red Mountain	P	06	03	63 45 00N	147 22 00W	63.75	-147.366666666667	6345'N	14722'W	Kuroko massive sulfide	Cu, Pb, Zn, Ag, Au		At WTF, estimated 1.10 million tonnes grading 0.15% Cu, 2.5% Pb, 7.9% Zn, 270 g/t Ag, and 1.9 g/t Au	Alaska Range and Yukon-Tanana Upland	Gilbert and Bundtzen, 1979; David R. Gaard, written commun., 1984	Massive pyrite, sphalerite, galena, and chalcopyrite in quartz-rich gangue occurs in felsic metavolcanic rocks derived from crystal and lapilli tuff, minor flows, and in metasedimentary rocks.  Massive sulfide layers on both sides of large east-west trending syncline.  The massive sulfide layers of the Red Mountain deposit occur in a proximal setting on the south limb of the anticline, within sulfide-silica exhalite up to 130 m thick.  An older, southern horizon hosts sphalerite and coarse pyrite in black chlorite schist.  The thin blanket of fine-grained sulfides of the WTF deposit on the north limb of the fold in a distal setting relative to the vent.  Deposits occur immediately below the Sheep Creek Member and above the Mystic Creek Member of the Mississippian Totatlanika Schist. 	Alaska

P06-04	Miyaoka, Hayes Glacier	P	06	04	63 41 00N	146 39 00W	63.6833333333333	-146.65	6341'N	14639'W	Kuroko massive sulfide	Cu, Pb, Zn, Au, Ag		Grab samples with up to 0.92% Cu, 0.72% Pb, 0.5% Zn, 50 g/t Au, 50 g/t Ag	Alaska Range and Yukon-Tanana Upland	Lange and Nokleberg, 1984; Nokleberg and Lange, 1985; Lange and others, 1993.	Zone about 13 km long and up to 0.5 km wide of massive sulfide lenses, pods, and disseminations with pyrrhotite, chalcopyrite, sparse pyrite, and sphalerite.  Individual lenses and pods up to 5 m long and 1 m thick.  Sulfides are in interfoliated former marine sequence of quartz mica schist, muscovite-chlorite-quartz schist, quartz-feldspar augen schist, chlorite schist, calc-schist, and marble.  Host rocks derived from Devonian felsic to intermediate volcanic rocks, mainly andesite, dacite, and quartz keratophyre flows and tuffs, and Devonian or older shale, marl, and marble.  Metavolcanic and metasedimentary rocks part of Yukon-Tanana terrane.  Two periods of metamorphism and deformation, an older period of lower amphibolite facies, and a younger period of lower greenschist facies.  Intensely deformed with locally abundant mylonite schist.	Alaska

P06-05	McGinnis Glacier	P	06	05	63 36 00N	146 14 00W	63.6	-146.233333333333	6336'N	14614'W	Kuroko massive sulfide	Zn, Cu, Pb, Ag		Grab samples with up to 2.3% Zn, 0.26% Cu, 0.25%  Pb, 50 g/t Ag	Alaska Range and Yukon-Tanana Upland	Lange and Nokleberg, 1984; Nokleberg and Lange, 1985; Lange and others, 1993.	Disseminated to massive pods of pyrite, chalcopyrite, and sphalerite in two or three layers exposed discontinuously along a zone up to about 15 m thick and 2 km long. Individual pods up to 1 m thick. Gangue of quartz, chlorite, epidote, biotite, and actinolite. Sulfides occur in interfoliated marine sequence of metasedimentary rocks, mainly quartz schist, chlorite-quartz schist and marble, and lesser amounts of metamorphosed Devonian andesite, dacite, and keratophyre flows, tuff, and volcanic graywacke of the Yukon-Tanana terrane. Two periods of metamorphism and deformation:  an older period of lower of amphibolite facies, and a younger period of lower greenschist facies. Intensely deformed with local abundant mylonite schist.	Alaska

P06-06	Ohio Creek	P	06	06	63 11 00N	149 55 00W	63.1833333333333	-149.916666666667	6311'N	14955'W	Sn greisen and Sn vein	Sn	Ag, As, Cu, Zn	Grab samples with up to 0.1% Sn, and minor Ag, As, Cu, Zn	Southern Alaska	Hawley and Clark, 1974	Zone of muscovite-tourmaline greisen and quartz arsenopyrite veins in tourmaline-bearing Tertiary granite stock.  Zone about 1.6 km long and 0.8 km wide.  Greisen zone about 4 m thick and 45 m long occurs along contact with biotite-rich inclusion.  Stock part of the lower Tertiary McKinley plutonic sequence and intrudes argillite, graywacke, and conglomerate, part of Upper Jurassic(?), Cretaceous, and lower Tertiary(?) flysch in region. 	Alaska

P06-07	Ready Cash	P	06	07	63 09 00N	149 52 00W	63.15	-149.866666666667	6309'N	14952'W	Polymetallic vein(?)	Au, Cu, Pb, Ag, Sn, Zn		Chip sample with 1.4 g/t Au, 857 g/t Ag, 1.5% Cu, and 5% Pb	Southern Alaska	Hawley and Clark, 1974	Arsenopyrite, chalcopyrite, and galena in quartz-arsenopyrite-sulfide veins, massive sulfide-rich veins, and disseminations along a zone at least 1.6 km long.  Zone occurs in Triassic(?) limestone and pillow basalt of Chulitna region.  	Alaska

P06-08	Golden Zone	P	06	08	63 13 00N	149 39 00W	63.2166666666667	-149.65	6313'N	14939'W	Polymetallic vein and Au-Ag breccia pipe or Cu-Au porphyry	Au, Cu, Zn, As, Sb, Ag, Pb		Inferred reserves of 1.6 million tonnes grading 5.2 g/t Au, and 0.5 % Cu.  Produced 49,169 g Au, 267,990 g Ag, 19 tonnes Cu	Southern Alaska	Hawley and Clark, 1974; Swainbank and others, 1977; Charles C. Hawley, written commun., 1985, 1990	Auriferous arsenopyrite with minor chalcopyrite, sphalerite, and pyrite in quartz gangue, fills open spaces of breccia pipe in center of early Tertiary quartz diorite porphyry, and fractures in porphyry adjacent to breccia pipe.  One zone about 125 m in diameter; high-grade ore occurs in breccia pipe approximately 75 m in diameter at surface.  Abundant veins adjacent to porphyry.  Porphyry, dated at 68 Ma; intrudes Permian to Jurassic sedimentary rocks of Chulitna area.  Extensive exploration through much of the 1980's.  	Alaska

P06-09	Nim, Nimbus, Silver King	P	06	09	63 17 00N	149 27 00W	63.2833333333333	-149.45	6317'N	14927'W	Polymetallic vein and Porphyry Cu(?)	Au, Ag, Cu	Zn, Mo, As	Nimbus and Silver King: grab samples with up to 2% Cu, 137 g/t Ag, 13 g/t Au	Southern Alaska	Hawley and Clark, 1974; Swainbank and others, 1977; Richard C. Swainbank, written commun., 1985, 1988	Nim Deposit:  Veins, veinlets, and disseminations of arsenopyrite, chalcopyrite, molybdenite, and chalcocite, with some pyrite, bornite, and pyrrhotite in disseminations and fracture fillings in breccia pipes and in dikes of early Tertiary rhyolite porphyry and quartz porphyry within a body of granite porphyry.  Igneous rocks intrude Triassic(?) and Jurassic(?) clastic sedimentary rocks.  Deposit occurs in area about 1 km by 2 km.  Nimbus and Silver King Prospects:  Lenses of massive chalcopyrite, arsenopyrite, stibnite, pyrite, and sphalerite, 1 to 2 m thick, and up to 10 m long occur in brecciated early Tertiary quartz diorite porphyry dike that occurs in strand of Upper Chulitna fault.	Alaska

P06-10	Coal Creek	P	06	10	63 15 25N	149 14 15W	63.2569444444444	-149.2375	6315'N	14914'W	Sn greisen(?) and Sn vein	Sn, Ag, W, Zn		Estimated 5 million tonnes of 0.28% Sn and about 0.5% Cu.  Grab samples with up to 1.5% Sn, 148 g/t Ag	Southern Alaska	Reed, 1977; Warner, 1985; Gregory Thurow, written commun., 1984	Cassiterite occurs in sheeted vein system as disseminated grains and locally high concentrations; and in minor disseminations within and above apical dome of early Tertiary granite, which intrudes older, related granite; and in thin quartz topaz-sulfide veinlets, 1 to 3 mm wide, that postdate alteration; and in stockwork veinlets.  Veins vary from hairline to 1 cm width, are nearly vertical, and reach a density of 10 veins per m in the most intensely fractured zones.  Veins form stockwork along fracture(?) zone in granite across area of about 4,000 m2.  Sulfides include arsenopyrite, pyrite, pyrrhotite, and sphalerite.  Granite adjacent to veinlets pervasively altered to quartz, tourmaline, topaz, sericite, and minor fluorite.  Granite intrudes and contact-metamorphoses Devonian argillite, graywacke, and minor limestone of Chulitna area.  Granite probably part of the McKinley plutonic sequence (K-Ar ages of 55 Ma).	Alaska

P06-11	Partin Creek	P	06	11	62 54 00N	149 57 00W	62.9	-149.95	6254'N	14957'W	Polymetallic vein or Cu-Ag quartz vein	Cu, Au, Ag		Grab samples with up to 0.7% Cu, 63 g/t Au, 300 g/t Ag	Southern Alaska	Hawley and Clark, 1974	Zone contains pyrite, arsenopyrite, pyrrhotite, and chalcopyrite in veinlets, disseminations, or vesicle fillings.  Zone at least 3,000 m long and 1,000 m wide in Triassic(?) metamorphosed pillow basalt and strongly limonite-stained marble.  	Alaska

P06-12	Treasure Creek	P	06	12	62 53 00N	149 18 00W	62.8833333333333	-149.3	6253'N	14918'W	Porphyry Cu-Mo	Mo, Cu	Au, Zn	No data	Southern Alaska	Richter, 1963; Csejtey and Miller, 1978	Disseminated molybdenite, chalcopyrite, arsenopyrite, sphalerite, fluorite, and epidote in silicified and sheared Tertiary granite stock, and in argillite and metagraywacke intruded by the granite.  Local intense argillic alteration and limonite staining adjacent to fault and extending irregularly up to 100 m into granite stock.  Argillite and metagraywacke part of regionally extensive Lower Cretaceous flysch unit.  Granite stock part of the lower Tertiary McKinley plutonic sequence.	Alaska

P06-13	Latouche, Beatson	P	06	13	60 02 00N	147 51 00W	60.0333333333333	-147.85	6002'N	14751'W	Besshi massive sulfide(?)	Cu, Ag, Zn	Au, Pb	Produced more than 84.4 million kg Cu from 4.5 million tonnes ore.  Average ore grade about 1.7% Cu, 9.3 g/t Ag	Prince William Sound	Johnson, 1915; Tysdal, 1978; Jansons and others, 1984; Crowe and others, 1992	Two major deposits and several smaller ones consisting of massive sulfide lenses and disseminations composed mainly of pyrite and pyrrhotite with minor chalcopyrite, cubanite, sphalerite, galena, silver, and gold.  Gangue of quartz, sericite, and ankerite.  Zone adjacent to major fault in graywacke and argillite of the lower Tertiary Orca Group.  Deposits along a zone up to 120 m thick and 300 long along strike.  Developed and produced mainly from about 1903 to 1934.	Alaska

P06-14	Denali (Pass Creek)	P	06	14	63 09 00N	147 08 00W	63.15	-147.133333333333	6309'N	14708'W	Besshi massive sulfide?	Cu, Ag		Massive sulfide layers with abundant Cu and up to 13 g/t Ag	Alaska Range	Stevens, 1971; Seraphim, 1975; Smith, 1981	Stratiform bodies of very fine grained and rhythmically layered chalcopyrite and pyrite laminations in thin-bedded, shaly, carbonaceous, and limy argillite enclosed in the Upper Triassic Nikolai Greenstone.  Ore body up to 166 m long and 9 m wide, and extends at least 212 m below surface.  Sulfides and host rocks metamorphosed at lower greenschist facies and locally moderately folded.  Several hundred meters of underground workings.  Property developed from 1964 to 1969, but never put into production.  Interpreted to have formed in a submarine volcanic environment of a reducing or euxinic marine basin with abundant organic matter and sulfate reducing bacteria.  	Alaska

P06-15	Fish Lake	P	06	15	63 13 00N	146 48 00W	63.2166666666667	-146.8	6313'N	14648'W	Gabbroic Ni-Co	Cr, Ni, Cu, PGE		Grab samples with >0.5% Cr and 0.3% Ni	Eastern Alaska Range	Nokleberg and others, 1984; Ian M. Lange and Warren J. Nokleberg, written commun., 1985; Bundtzen and others, 1996.	Chromite, disseminated and in wispy layers, in serpentinized olivine cumulate, and Ni-Cu-PGE sulfide minerals occuring at base of ultramafic sill.  Zone up to 15 km long along strike and up to 2 km wide.  Local anomalous Cu and Ni in stream-sediment and rock samples collected nearby.  Olivine cumulate interpreted as comagmatic metamorphosed basalt of the Upper Triassic Nikolai Greenstone.	Alaska

P06-16	Zackly	P	06	16	63 13 00N	146 42 00W	63.2166666666667	-146.7	6313'N	14642'W	Cu-Au skarn	Au, Cu, Ag		Grab samples with up to 6.6% Cu, 4.4 g/t Au, 30 g/t Ag.  Estimated 1.25 million tonnes of 2.6% Cu and 5.4 g/t Au	Southern Alaska	Rose, 1965b; Ian M. Lange and Warren J. Nokleberg, written commun., 1984; Nokleberg and others, 1984; Rainier Newberry, written commun., 1985; Clint R. Nauman, written commun., 1985;  Ford, 1987	Disseminated chalcopyrite, bornite, pyrite, and gold in zone of andradite garnet-pyroxene skarn and adjacent sulfide bodies in contiguous marble.  In Upper Triassic marble along east-west-striking contact with albitized Cretaceous quartz monzodiorite.  Zone about 650 m long and about 30 m wide.  Marble and diorite locally intensely faulted.  Higher Au grades mainly associated with supergene(?) assemblage of malachite, limonite, chalcedony, and native copper.  Gold occurs only in skarn; granitic pluton and wall rocks barren of gold.  General zoning from granitic pluton to skarn with  (1) brown garnet with chalcopyrite,  (2) green garnet with bornite and chalcopyrite,  (3) clinopyroxene and wollastonite, and  (4) marble with magnetite and bornite.	Alaska

P06-17	Kathleen-Margaret	P	06	17	63 17 00N	146 33 00W	63.2833333333333	-146.55	6317'N	14633'W	Cu-Ag quartz vein	Cu, Ag, Au		Grab samples with up to 13% Cu, 3.2 g/t Au, 300 g/t Ag.  About 1.8 tonnes ore produced	Wrangell Mountains	MacKevett, 1965; Nokleberg and others, 1984	Quartz veins up to 140 m long and 3 m wide with disseminated to massive chalcopyrite, bornite, and malachite cut Upper Triassic Nikolai Greenstone.  Veins strike east-west are intruded along shear zones.  Some underground exploration but long dormant.  	Alaska

P06-18	Rainy Creek District	P	06	18	63 20 00N	146 02 00W	63.3333333333333	-146.033333333333	6320'N	14602'W	Cu-Ag skarn	Cu, Ag, Au	Zn	Grab samples with up to 5.6% Cu, 300 g/t Ag, 1.2 g/t Au, 0.07% Zn	Alaska Range-Wrangell Mountains	Rose, 1966; Lange and others, 1981; Nokleberg and others, 1984; Ian M. Lange and Warren J. Nokleberg, written commun., 1984	Scattered garnet-pyroxene skarn bodies that contain disseminated to small masses of chalcopyrite, and bornite, with minor sphalerite, galena, magnetite, secondary Cu-minerals, and sparse gold.  Deposits occur in faulted lenses of marble of the Pennsylvanian and Permian Slana Spur Formation adjacent to late Paleozoic(?) metagabbro, metadiabase, and hypabyssal meta-andesite intrusive rocks.  Local disseminated sulfides in meta-andesite.  Zone of skarns up to about 10 km long and up to 5 km wide.  Sulfide-bearing bodies and adjacent wall rocks locally intensely faulted.	Alaska

P06-19	Rainbow Mountain	P	06	19	63 20 00N	145 41 00W	63.3333333333333	-145.683333333333	6320'N	14541'W	Porphyry Cu	Cu, Ag		Grab samples with up to 10% Cu, 44 g/t Ag, trace Au	Alaska Range-Wrangell Mountains	Lange and others, 1981; Nokleberg and others, 1984; Ian M. Lange and Warren J. Nokleberg, written commun., 1985	Zone with scattered occurrences of disseminated to small masses of chalcopyrite and pyrite, and minor sphalerite and galena in Permian meta-andesite and meta-dacite hypabyssal porphyries.  Zone up to 6 km long and up to 1 km wide.  Locally disseminated sulfides in metavolcanic and metasedimentary rocks near porphyries and meta-andesites.	Alaska

P06-20	Delta District	P	06	20	63 14 00N	144 10 00W	63.2333333333333	-144.166666666667	6314'N	14410'W	Kuroko massive sulfide	Pb, Zn, Cu, Ag, Au		Largest deposit contains 18 million tonnes of 0.3 to 0.7% Cu, 1 to 3% Pb, 3 to 6% Zn, 34 to 100 g/t  Ag, 1 to 3.4 g/t Au	Alaska Range and Yukon-Tanana Upland	Nauman and others, 1980; Lange and Nokleberg, 1984; Clint R. Nauman and Steven R. Newkirk, written commun., 1984; Lange and others, 1993.	Large massive sulfide district covers about 1,000 sq km, with about 26 stratiform, transposed, and fewer replacement deposits occurring along four regional trends.  Consist of varying amounts of pyrite, chalcopyrite, galena, sphalerite, and lesser malachite and bornite.  Gangue mainly quartz, carbonate, and white mica.  Hydrothermal alteration marked by chlorite, quartz, sericite, pyrite, and lead-silver-gold sulfides.  Massive sulfides and adjacent layers with disseminated sulfides occur in zones typically 500 m long, 200 m wide, and 15 m thick.  Hosted in metamorphosed Devonian spilite and keratophyre suite derived from flows, tuffs, and breccia, and metamorphosed shallow- and deep-marine sedimentary rocks; now mainly quartz schist, quartz-chlorite-feldspar schist, calc-schist, and marble of the Yukon-Tanana terrane.  Numerous tholeiitic greenstone sills spatially associated with the massive sulfide bodies, and possibly genetically related to the metavolcanic suite.	Alaska

P06-21	Slate Creek	P	06	21	63 09 00N	144 48 00W	63.15	-144.8	6309'N	14448'W	Porphyry Cu(?)	Cu, Ag, Au	Zn	Grab samples with up to 2% Cu, 70 g/t Ag, 2 g/t Au	Alaska Range-Wrangell Mountains	Lange and others, 1981; Ian M. Lange and Warren J. Nokleberg, written commun., 1984; Nokleberg and others, 1984	Zone with scattered occurrences of disseminated to small masses of chalcopyrite and pyrite, with minor sphalerite and galena in Permian(?) meta-andesite to metadacite hypabyssal porphyries.  Zone about 2 km wide and up to 9 km long along strike.  Disseminated sulfides locally in adjacent metavolcanic and metasedimentary rocks of the Pennsylvanian and Permian Slana Spur Formation.	Alaska

P06-22	Chistochina District	P	06	22	63 04 30N	144 47 00W	63.075	-144.783333333333	6305'N	14447'W	Porphyry Cu and polymetallic vein	Cu, Pb, Ag, Au		Grab samples with up to 20% Pb, 1.4% Cu, 21 g/t Ag, 1.4 g/t Au	Alaska Range-Wrangell Mountains	Richter, 1966; Rainier J. Newberry, written commun., 1985	Several small areas with galena, pyrite, chalcopyrite, tetrahedrite, and gold in quartz veins, small masses, and  disseminations in margins of the Pennsylvanian and Permian Ahtell quartz diorite pluton and in adjacent volcanic and sedimentary rocks of the Pennsylvanian and Permian Slana Spur Formation.  Quartz veins up to 10 m wide, locally contain massive barite, calcite, and cerussite over an area about 5 km long and 3 km wide.  Local, small Cu-Au and Pb-Zn skarns.	Alaska

P06-23	Lucky Hill, Timberline Creek	P	06	23	63 11 15N	147 16 18W	63.1875	-147.271666666667	6311'N	14716'W	Au quartz vein	Au, Ag		348,000 tonnes, averaging 7.1 g/t Au	Maclaren	Smith, 1981; Adams and others, 1992	Free gold and minor pyrite, pyrrhotite, arsenopyrite, galena, and sphalerite in sheeted quartz veins striking east-northeast and dipping steeply to the northwest.  Veins occur in semischist of the Maclaren Glacier metamorphic belt. Veins also cut granodiorite at Timberline Creek.  Distinctive, yellowish ankerite-carbonate assemblage occurs in veins.  At Lucky Hill and Timberline Creek, Ar-Ar isotopic ages on primary micas from pluton yield emplacement age of 90-100 Ma.  The age of mineralization (vein formation) is 57-63 Ma or the same age as that determined for the biotite blocking temperature in the Maclaren Glacier metamorphic belt.  Because of these relations, gold mineralization is interpreted as related to regional metamorphism.  Fluid inclusions are low salinity, high CO2 types with homogenization temperatures of about 270C.  	Alaska

P06-24	Willow Creek District (Gold Cord, Independence, Thope, and others)	P	06	24	61 45 00N	149 30 00W	61.75	-149.5	6145'N	14930'W	Au quartz vein	Au	W, As, Zn, Pb, Te	Average grade of 17 to 69 g/t Au. Produced about 18.4 million g Au from 1909 to 1950. 	Talkeetna Mountains	Ray, 1954; Madden-McGuire and others, 1989	Quartz veins with a few percent or less pyrite, chalcopyrite, magnetite, and gold; with minor arsenopyrite, sphalerite, tetrahedrite, gold tellurides, and galena.  Veins average 0.3 to 1 m thick, but some up to 2 m thick.  Veins occupy east-northeast and north-south-striking shear zones up to 7 m wide.  Considerable alteration of wall rocks to sericite, pyrite, carbonate, and chlorite in parallel bands.  Locally abundant clay-rich fault gouge along shear zones.  Zone of veins in and along southern margin of Jurassic quartz diorite and younger Cretaceous and early Tertiary granitic rocks of the Talkeetna Mountains batholith, and in mica schist at the Thorpe mine.  Veins interpreted as coeval with intrusion of early Tertiary adamellite pluton.  District consists of several mines and many prospects, most in an area about 12.8 km long and 6.2 km wide along southern portion of batholith.  Several thousand meters of underground workings.  Nearly continuous mining and development from 1909 through 1942; sporadic activity from 1951 through present. 	Alaska

P06-25	Bernard Mountain, Dust Mountain	P	06	25	61 32 00N	145 09 00W	61.5333333333333	-145.15	6132'N	14509'W	Podiform Cr	Cr, PGE		Four large low-grade deposits with 330,000 tonnes Cr2O3	Kodiak Island and Border Ranges	Foley and others, 1984, 1985, 1992; Coleman and Burns, 1985; Burns, 1985; Newberry, 1986  	Disseminations and sparse layers and lenses of chromite up to a few tens of meters long and 15 m wide in dunite tectonite.  Largest deposit about 3.5 km long and 2.0 km wide, contains about 300,000 tonnes of material with 5% chromite.  Sample of high-Fe chromian spinel from Dust Mountain contains up to 21 g/t PGE.  Hosted in layered dunite tectonite which is part of the Early Jurassic or older, informally named Border Ranges ultramafic and mafic complex of Burns (1985); faulted at base.  Local abundant serpentinite.  Structural sequence from south to north composed of dunite, harzburgite, wehrlite, garnet gabbro, norite, and hornblende norite.  Sporadic exploration and trenching from about 1940 to present.	Alaska

P06-26	Spirit Mountain	P	06	26	61 18 30N	144 12 45W	61.3083333333333	-144.2125	6119'N	14413'W	Gabbroic Ni-Cu	Ni, Cu, Co, Ag		At least 11,000 tonnes ranging up to 6.2 % Ni and 3.4 % Cu and 0.04 % Co.  (Average 0.88 % Ni and 0.9 % Cu)

	Kodiak Island and Border Ranges	Kingston and Miller, 1945; Herreid, 1970	Disseminated and locally massive pyrrhotite, pyrite, chalcopyrite, pentlandite, and ullmannite (a sulphantimonide of nickel), bravoite, and minor to trace galena and sphalerite in gabbro, peridotite, and hornblendite sills and dikes that cut Mississippian Strelna Formation with an east-west trend.  Ultramafic and mafic rocks may be part of the Early Jurassic or older, informally named Border Ranges ultramafic and mafic complex of Burns (1985).  The sills and dikes are believed to intrude along a major thrust fault that juxtaposes a foliated quartz diorite pluton and the upper Paleozoic rocks.  Deposit(s) occur as a series of lenses 1-3 m thick that extend along strike for about 2 km.  Explored with trenches, pits, and two short tunnels.	Alaska

P06-27	Gold King	P	06	27	61 12 00N	146 44 00W	61.2	-146.733333333333	6112'N	14644'W	Au quartz vein	Au	Pb, Cu, Zn, Sb	Produced about 62,000 g Au.  Chip samples with up to 3.4 g/t Au and 1.3 g/t Ag	Chugach Mountains	Johnson, 1915; Jansons and others, 1984	Two or more quartz fissure veins up to 1.5 m thick with gold, pyrite, galena, sphalerite, chalcopyrite, and stibnite, mainly in metagraywacke of the Upper Cretaceous Valdez Group.  Sulfides compose about 3% of ore.  Mineralized vein cuts small granite pluton.  Graywacke locally shattered and sheared near veins.  About 600 m of underground workings.  Production principally between 1911 to 1924.	Alaska

P06-28	Cliff (Port Valdez)	P	06	28	61 07 00N	146 33 00W	61.1166666666667	-146.55	6107'N	14633'W	Au quartz vein	Au	Cu, Ag, Pb, Zn, Sb	Average grade of 34 to 69 g/t Au.  Produced about 1,610,000 g Au from about 25,000 tonnes ore	Chugach Mountains	Johnson, 1915; Pickthorn, 1982(?); Jansons and others, 1984	Quartz veins up to 3 m thick and 515 m long with gold, pyrite, galena, sphalerite, arsenopyrite, and stibnite in metagraywacke and minor phyllite of the Upper Cretaceous Valdez Group.  Veins in complicated system of intersecting faults.  Sulfides compose about 3 to 5% percent of ore.  A few thousand meters of underground workings.  Production mainly from 1906 to 1940.	Alaska

P06-29	Ramsay-Rutherford	P	06	29	61 12 00N	146 06 00W	61.2	-146.1	6112'N	14606'W	Au quartz vein	Au	As, Cu, Zn, Pb	Produced about 172,000 g Au.  Grab samples with up to 28g/t Au	Chugach Mountains	Johnson, 1915; Jansons and others, 1984	Two main quartz fissure veins up to 2 m thick and 136 m long with sparse gold, silver, pyrrhotite, pyrite, chalcopyrite, sphalerite, galena, and arsenopyrite(?) in metagraywacke of the Upper Cretaceous Valdez Group.  Gangue of quartz, carbonates, and crushed country rock.  More than 450 m of underground workings.  Mined from about 1914 to 1935.	Alaska

P06-30	Midas	P	06	30	61 01 00N	146 16 00W	61.0166666666667	-146.266666666667	6101'N	14616'W	Besshi massive sulfide(?)	Cu, Ag, Au, Zn		Average grade of about 3.2% Cu, 13.7 g/t Ag, 2.1 g/t Au.  Produced 1.54 million kg Cu, 471,000 g Ag, 79,000 g Au from 44,800 tonnes of ores.  Estimated 56,200 tonnes grading 1.6% Cu ore remain	Prince William Sound	Johnson, 1915; Moffit and Fellows, 1950; Rose, 1965b; Winkler and others, 1981; Nelson and Koski, 1987; Jansons and others, 1984; Steven W. Nelson, written commun., 1986; Crowe and others, 1992	Disseminated to massive stratiform chalcopyrite, pyrite, pyrrhotite, sphalerite, and minor galena in ore body up to 7 m thick and 300 m long.  Ore bodies occur in phyllite and metagraywacke of the Upper Cretaceous Valdez Group.  Sulfide layering parallels bedding and is folded with the host sedimentary rocks.  Weak to unmineralized quartz stockwork in footwall may be feeder system for main ore body.   Extensive underground workings with production between 1911 and 1919.  Estimated 44,800 tonnes ore mined.  Earlier workers interpreted deposit as epigenetic replacement in shear zones.	Alaska

P06-31	Ellamar	P	06	31	60 54 00N	146 42 00W	60.9	-146.7	6054'N	14642'W	Besshi massive sulfide	Cu, Au, Ag	Zn	Produced about 7.2 million kg Cu, 1,457,000 g Au, and 5.96 million g Ag from 274,000 tonnes ore	Prince William Sound	Capps and Johnson, 1915; Jansons and others, 1984; Crowe and others, 1992	Pyrite, pyrrhotite, chalcopyrite, cubanite, and sphalerite in disseminations and massive sulfide lenses up to 70 m thick and 150 m long in folded and sheared argillite and graywacke of the lower Tertiary Orca Group.  Local diabase dikes.  Explored and mined from about 1897 to 1920.  A few thousand meters of workings.	Alaska

P06-32	Threeman, Standard Copper	P	06	32	60 51 00N	146 33 00W	60.85	-146.55	6051'N	14633'W	Cyprus massive sulfide	Cu, Au, Ag	Zn	About 14,500 kg Cu and byproduct Au and Ag produced at Standard Copper; 0.5 million kg Cu, 3,141 g Au, and 165,000 g Ag at Threeman	Prince William Sound	Capps and Johnson, 1915; Jansons and others, 1984; Crowe and others, 1992	Two deposits of chalcopyrite, pyrrhotite, sphalerite, cubanite, and galena in lenticular masses and disseminations.  Lenses up to about 2 m wide and 120 m long.  Deposits occur in locally sheared and altered argillite, graywacke, tuff, and pillow basalt of the lower Tertiary Orca Group.  Explored and mined from about 1904 to about 1918.  A few thousand meters of workings.	Alaska

P06-33	Fidalgo-Alaska, Schlosser	P	06	33	60 46 00N	146 25 00W	60.7666666666667	-146.416666666667	6046'N	14625'W	Besshi massive sulfide(?)	Cu, Zn		Produced about 1.89 million kg Cu from 19,440 tonnes ore.  Estimated 23,000 tonnes of 3.2% Cu remain	Prince William Sound	Capps and Johnson, 1915; Jansons and others, 1984; Crowe and others, 1992	Chalcopyrite and pyrite, with rare sphalerite and pyrrhotite occur in broad shear zones up to 90 m long.  Quartz and calcite gangue.  Deposits occur in intensely folded and sheared graywacke, limestone, and argillite of the lower Tertiary Orca Group.  Developed and mined from 1913 to about 1920.  About 750 m of underground workings.	Alaska

P06-34	Monarch, Jewel	P	06	34	61 02 00N	149 06 00W	61.0333333333333	-149.1	6102'N	14906'W	Au quartz vein	Au	Pb, Cu, Zn, As, Mo	Produced about 154,000 g Au.  Chip samples range from 10.6 to 36.7 g/t Au with about 10.6 g/t Ag	Chugach Mountains	Johnson, 1915; Jansons and others, 1984	Two or more quartz veins up to 0.3 m thick with calcite, and sparse galena, chalcopyrite, sphalerite, arsenopyrite, molybdenite, gold, and silver in metagraywacke and phyllite of the Upper Cretaceous Valdez Group.  Few Tertiary felsic dikes and granodiorite.  Over 380 m of underground workings.	Alaska

P06-35	Mineral King (Herman and Eaton)	P	06	35	60 57 00N	148 21 00W	60.95	-148.35	6057'N	14821'W	Au quartz vein	Au	Zn, Pb, Cu, As	Produced about 87,000 g Au.  Grab samples with up to 5.1 g/t Au and 4.5 g/t Ag.  Estimated 450 tonnes ore	Chugach Mountains	Tysdal, 1978; Jansons and others, 1984	Quartz veins up to 2 m wide form lenses up to 22 m long with calcite, sphalerite, pyrite, galena, chalcopyrite, gold, pyrrhotite, and arsenopyrite in metagraywacke and phyllite of the Upper Cretaceous Valdez Group and in Tertiary granite.  About 450 m of underground workings.	Alaska

P06-36	Granite	P	06	36	60 58 00N	148 13 00W	60.9666666666667	-148.216666666667	6058'N	14813'W	Au quartz vein	Au	As, Cu, Pb, Sb, Zn	Produced about 776,000 g Au.  Estimated 1,700 tonnes ore	Chugach Mountains	Tysdal, 1978; Jansons and others, 1984	Fissure up to 4 m wide with brecciated phyllite and metagraywacke cemented by quartz with gold, pyrite, arsenopyrite, chalcopyrite, galena, stibnite, and sphalerite in the Upper Cretaceous Valdez Group and in Tertiary granite.  Extensive development from about 1914 to about 1940.	Alaska

P06-37	Lucky Strike (Palmer Creek)	P	06	37	60 46 00N	149 33 00W	60.7666666666667	-149.55	6046'N	14933'W	Au quartz vein	Au	Cu, Pb, Ag	Grab sample with 7 g/t Ag and 0.15% Pb.  Produced about 172,450 g Au.  Estimated 1,800 tonnes ore	Chugach Mountains	Tysdal, 1978; Jansons and others, 1984	Quartz vein up to 1.7 m thick with sparse gold, pyrite, chalcopyrite, sphalerite, and galena in brecciated and fractured phyllite of the Upper Cretaceous Valdez Group.  Fractures normal to cleavage.  Extensive development; production mainly between 1916 and 1940.	Alaska

P06-38	Alaska Oracle, Gilpatrick	P	06	38	60 37 00N	149 34 00W	60.6166666666667	-149.566666666667	6037'N	14934'W	Au quartz vein	Au		Produced about 106,000 g Au.  Estimated 1,800 tonnes ore.  	Chugach Mountains	Tuck, 1933; Tysdal, 1978; Jansons and others, 1984	Quartz veins up to 2 m thick with gold, arsenopyrite, galena, and sphalerite, and some chalcopyrite, molybdenite, and pyrrhotite.  Veins in fault zones mainly in phyllite of the Upper Cretaceous Valdez Group.  Wall rocks locally altered near veins, with highest grade ore in areas of most alteration.  Over 200 m of underground workings.  Most production from about 1933 to 1940.	Alaska

P06-39	Crown-Point, Kenai-Alaska	P	06	39	60 27 00N	149 18 00W	60.45	-149.3	6027'N	14918'W	Au quartz vein	Au	As, Pb, Zn	Produced about 97,200 g Au.  Estimated 13,600 tonnes ore	Chugach Mountains	Martin and others, 1915; Tysdal, 1978; Jansons and others, 1984	Shear zone up to 900 m long and 12 cm wide in phyllite of the Upper Cretaceous Valdez Group is filled with brecciated phyllite cemented by vuggy quartz that contains gold, arsenopyrite, galena, sphalerite, and calcite.  Local quartz lenses and stringers up to 0.75 m wide.  Extensive development mainly from about 1909 to 1940; over 500 m of underground workings.	Alaska

P06-40	Copper Bullion, Rua Cove	P	06	40	60 21 00N	147 39 00W	60.35	-147.65	6021'N	14739'W	Besshi massive sulfide	Cu	Zn	Estimated 1.0 million tonnes of 1.25% Cu	Prince William Sound	Johnson, 1915, 1918; Stafansson and Moxham, 1946; Tysdal, 1978; Koski and others, 1985; Crowe and others, 1992	Lens-shaped body of pyrrhotite with minor chalcopyrite and sphalerite in sheared pillow basalt of the lower Tertiary Orca Group.  Lens about 200 m long.  No production.  	Alaska

P06-41	Knight Island, Pandora	P	06	41	60 20 00N	147 42 00W	60.3333333333333	-147.7	6020'N	14742'W	Cyprus massive sulfide	Cu	Zn	Produced up to a few thousand tonnes ore	Prince William Sound	Moffit and Fellows, 1950; Tysdal, 1978; Jansons and others, 1984; Crowe and others, 1992	Two major deposits and several smaller deposits with pyrite, pyrrhotite, chalcopyrite, cubanite, sphalerite, and quartz in massive sulfide lenses and disseminations.  Lenses up to 9 m thick; average 1.5 m thick.  Lenses mainly at sheared contacts with host rocks.  Deposits occur in pillow basalt of the lower Tertiary Orca Group.  A few hundred meters of underground workings; minor production.	Alaska

P07-01	Mosquito	P	07	01	63 53 00N	143 28 00W	63.8833333333333	-143.466666666667	6353'N	14328'W	Porphyry Cu-Mo	Cu, Mo		No data	East-Central Alaska	Singer and others, 1976	Disseminated chalcopyrite, molybdenite, and pyrite in hydrothermally altered Late Cretaceous to early Tertiary quartz monzonite and quartz monzonite porphyry.  Granitic rocks intrude mid-Paleozoic or older schist of the Yukon-Tanana terrane.	Alaska

P07-02	Taurus	P	07	02	63 39 00N	141 19 00W	63.65	-141.316666666667	6339'N	14119'W	Porphyry Cu-Mo	Cu, Mo		Estimated 126 million tonnes grading 0.30 % Cu, 0.03% Mo, 0.34 g/t Au	East-Central Alaska	Edward R. Chipp, written commun., 1984; Bundtzen and others, 1992b	At least three areas of mineralization and locally intense potassic, propylitic, and sericitic alteration occur along a zone of hypabyssal plutons about 13 km long and 1.6 km wide.  Plutons consist of early Tertiary granite porphyry, granodiorite, and quartz latite porphyry that intrudes middle Paleozoic or older quartz-sericite schist and gneiss of Yukon-Tanana terrane.  Numerous faults and shears.  Ore consists of chalcopyrite, molybdenite, and pyrite in disseminations and veinlets of quartz-orthoclase-sericite, quartz-magnetite-anhydrite, quartz-sericite-pyrite-clay-fluorite, quartz-orthoclase-biotite, and of solid chalcopyrite.  Magnetite-rich cores of the potassic altered, granite porphyries contain sparse sulfides.  Higher concentrations of Cu and Mo sulfides occur with periphery that contains phyllic alteration.  Sequence of alteration, from oldest to youngest:  propylitic, potassic, phyllic, and argillic.  Potassic alteration in core of plutons, propylitic and sericite alteration in periphery and adjacent wall rocks.  Local tourmaline, fluorite, and replacement of chalcopyrite by chalcocite.   	Alaska

P07-03	Bluff	P	07	03	63 38 00N	141 29 00W	63.6333333333333	-141.483333333333	6338'N	14129'W	Porphyry Cu-Mo	Cu, Mo		No data	East-Central Alaska	Singer and others, 1976; Eberlein and others, 1977	Disseminated pyrite, chalcopyrite, molybdenite, and magnetite in hypabyssal Cretaceous or early Tertiary porphyritic granite, granodiorite, and quartz porphyry.  Intense hydrothermal alteration.  Numerous faults and dikes.  Granitic rocks intrude middle Paleozoic or older schist of the Yukon-Tanana terrane.	Alaska

P07-04	Asarco	P	07	04	63 22 00N	142 30 00W	63.3666666666667	-142.5	6322'N	14230'W	Porphyry Cu-Mo	Cu, Mo		No data	East-Central Alaska	Singer and others, 1976; Helen L. Foster, written commun., 1977, in Eberlein and others, 1977	Disseminated molybdenite and Cu-sulfides in silicified and leached, Tertiary, hypabyssal, quartz porphyry pluton that intrudes middle Paleozoic or older Yukon-Tanana terrane.	Alaska

P07-05	Casino (Patton Hill)	P	07	05	62 44 12N	138 49 00W	62.7366666666667	-138.816666666667	6244'N	13849'W	Porphyry Cu-Mo	Cu, Mo	W, Au	Large.  Reserves of 584 million tonnes (hypogene and supergene) grading 0.26% Cu, 0.025% MoS2, 0.31 g/t Au.	East-Central Alaska	D. Eaton and S. Main, Archer, Cathro, and Associates,  written commun., 1986; EMR Canada, 1989; Mining Review, 1992; Sinclair, 1986; Northern Miner, December 6,1993.	Hypogene part of deposit consists of chalcopyrite and molybdenite that are associated with phyllitic alteration (quartz+sericite+sulfide) in fine breccia, porphyritic dacite, granite and tuffaceous rocks. Igneous rocks are associated with the Late Cretaceous Mount Nansen Igneous suite (with a K-Ar isotopic age 71.3 Ma  2.2 Ma) that is surrounded by older unmineralized quartz monzonite and granodiorite.  A supergene enrichment zone with 95 million tonnes grading 0.43% Cu, 0.031% Mo, averages 80 meters thick and contains malachite, chalcocite, covellite, native Cu, pyrite and molybdenite.  Consistent gold grades in the supergene zone over large areas range from 0.3 to 0.5 g/t.  An additional 31 million tonnes of oxide gold ore grading 0.62 g/t occurs in a leached cap. Deposit age interpreted as Late Cretaceous.	Canada

P07-06	Nabesna, Rambler	P	07	06	62 23 00N	143 00 00W	62.3833333333333	-143	6223'N	14300'W	Fe-Au skarn	Au	Cu, Ag, Pb, Zn, Fe	Nabesna Mine produced about 1.66 million g Au, minor Ag and Cu.  Estimated 18,000 tonnes grading 34.3 g/t Au in Rambler mine.  	Eastern-Southern Alaska	Wayland, 1943; Richter and others, 1975; Donald H. Richter, written commun., 1985; Rainer Newberry and T.K. Bundtzen, written commun., 1985	Nabesna Mine:  massive oxide-sulfide bodies, quartz-pyrite veins, and pyrite veins, all with disseminated gold in Upper Triassic Chitistone or Nizina Limestone near contact with Cretaceous monzodiorite pluton.  Massive oxide-sulfide bodies chiefly pyrite and magnetite with minor chalcopyrite, galena, sphalerite, arsenopyrite, stibnite, and gold.  Pyrite veins formed by replacement of limestone along pre-existing fractures and contain disseminated to small masses of chalcopyrite, galena, sphalerite, magnetite, pyrrhotite, arsenopyrite, stibnite, and gold.  Large body of massive auriferous pyrrhotite and pyrite at Rambler Mine.  Monzodiorite pluton has K-Ar ages of 109 and 114 Ma.  Principal mining at Nabesna from about 1930 to 1941.  Several hundred meters of workings.  Several episodes of exploration since.  	Alaska

P07-07	Orange Hill, Bond Creek	P	07	07	62 12 00N	142 45 00W	62.2	-142.75	6212'N	14245'W	Porphyry Cu-Mo and Cu-Au skarn	Cu, Mo, Au		Estimated 320 million tonnes grading 0.35% Cu and 0.02% Mo at Orange Hill.  500 million tonnes grading 0.30% Cu and 0.02% Mo at Bond Creek.  	Eastern-Southern Alaska	Van Alstine and Black, 1946; Richter and others, 1975. 	Two similar deposits with pyrite, chalcopyrite, and minor molybdenite in quartz veinlets in the Cretaceous Nabesna pluton, a complex intrusion of granodiorite and quartz diorite intruded by granite porphyry.  Abundant biotite-quartz, quartz-sericite, and chlorite-sericite-epidote alteration;  late anhydrite veins.  Altered areas about 1,000 by 3,000 m at Orange Hill, and 2,000 by 3,000 m at Bond Creek.  Associated skarns with pyrite, chalcopyrite, bornite, and magnetite at Orange Hill, and sphalerite, pyrite, pyrrhotite, and chalcopyrite in adjacent areas.  Pluton intrudes upper Paleozoic metavolcanic rocks and marble, and Upper Triassic limestone and Nikolai Greenstone.	Alaska

P07-08	Nabesna Glacier and adjacent areas.	P	07	08	62 07 00N	142 50 00W	62.1166666666667	-142.833333333333	6207'N	14250'W	Polymetallic vein(?)	Cu, Zn, Au		No data.	Southern Alaska?	Richter, 1975	Three contiguous areas with:  (1) quartz veins and veinlets that contain pyrite, with minor chalcopyrite and sphalerite;  (2) a zone of disseminated malachite and azurite;  (3) a zone of intense alteration with breccia cemented by quartz, pyrite, chalcopyrite, and galena.  Deposits occur in late Paleozoic metavolcanic porphyry and metabasalt flows of the Tetelna Volcanics; may be related to nearby Cretaceous and Tertiary granitic plutons and dikes. 	Alaska

P07-09	Baultoff, Horsfeld, Carl Creek	P	07	09	62 05 00N	141 13 00W	62.0833333333333	-141.216666666667	6205'N	14113'W	Porphyry Cu	Cu	Mo	Estimated 240 million tonnes grading 0.2% Cu and <0.01% Mo; trace Au	Eastern-Southern Alaska	Richter and others, 1975	Three separate areas with pyrite and chalcopyrite in veinlets and disseminated in altered Cretaceous granitic plutons composed of quartz diorite, quartz diorite porphyry, or granite porphyry.  Altered areas up to 1,000 by 2,000 m with chlorite, sericite, albite, and pyrite.  Local actinolite veins and disseminations.  Host rocks part of the Cretaceous Klein Creek batholith and associated granitic rocks which intrude Upper Jurassic and Lower Cretaceous flysch of Gravina-Nutzotin belt. 	Alaska

P07-10	Nugget Creek	P	07	10	61 39 00N	143 43 00W	61.65	-143.716666666667	6139'N	14343'W	Cu-Ag quartz vein	Cu, Ag		Grab sample with >200 g/t Ag, and >2% Cu.  Produced 145 tonnes ore and concentrate	Wrangell Mountains	MacKevett, 1976	Quartz vein more than 1 m thick with bornite, chalcopyrite, and pyrite.  Vein occurs along fault in Upper Triassic Nikolai Greenstone.  Slablike copper nugget weighing several tonnes found as float in Nugget Creek.  Development and production from 1916 to 1919.  More than 1,200 m underground workings. Grade decreases at depth.  	Alaska

P07-11	London and Cape	P	07	11	61 34 00N	143 43 00W	61.5666666666667	-143.716666666667	6134'N	14343'W	Porphyry Cu-Mo	Cu, Mo, Ag		Grab samples with up to 10% Cu, 0.007% Mo, 1.5 g/t Ag.  Average grade of about 0.1% Cu	Eastern-Southern Alaska	Moffitt and Mertie, 1923; MacKevett, 1976	Pyrite and chalcopyrite in veinlets and disseminations in locally altered Jurassic(?) granodiorite and quartz diorite.  Granitic rocks intrude Lower Cretaceous sedimentary rocks.  Short adit.  	Alaska

P07-12	Midas (Berg Creek)	P	07	12	61 33 00N	143 47 00W	61.55	-143.783333333333	6133'N	14347'W	Cu-Au skarn	Au, Cu, Ag		Grab samples with up to 8 g/t Au, 10 g/t Ag, and 20% Cu	Eastern-Southern Alaska	MacKevett, 1976	Disseminated to small masses of magnetite, pyrite, and chalcopyrite in quartz veins and skarns in metamorphosed Triassic Nizina Limestone adjacent to Jurassic granodiorite to quartz monzodiorite pluton.  Skarn composed of magnetite and epidote with local pyrite, chalcopyrite, and gold.  Two short adits. 	Alaska

P07-13	Kennecott District	P	07	13	61 31 00N	142 50 00W	61.5166666666667	-142.833333333333	6131'N	14250'W	Kennecott Cu	Cu, Ag		Produced about 544 million kg Cu and 280 million g Ag from 4.3 million tonnes ore	Wrangell Mountains	Bateman and McLaughlin, 1920; MacKevett, 1976; Armstrong and MacKevett, 1982; Edward M. MacKevett, Jr., written commun., 1986	Mainly chalcocite and covellite, with minor enargite, bornite, chalcopyrite, luzonite, and pyrite.  Tennantite, sphalerite, and galena extremely rare. Local surface oxidation of sulfides to malachite and azurite.  Sulfides occur mainly as large, irregular, massive, wedge-shaped bodies, mainly in dolomitic parts of the Upper Triassic Chitistone or Nizina Limestone;  generally less than 100 m above the Middle and(or) Upper Triassic Nikolai Greenstone.  Largest ore body (Jumbo) consists of an almost pure chalcocite and covellite mass about 110 m high, up to 18.5 m wide, and that extends 460 m along plunge. One of the most productive group of mines in Alaska from 1913 until 1938 when the ore was exhausted.  More than 96 km of underground workings.  Major mines in district are Jumbo, Bonanza, Erie, Mother Lode, and Green Butte.  Deposits interpreted by Armstrong and MacKevett (1982) as having formed by mobilization of Cu from the underlying Nikolai Greenstone and deposited during regional metamorphism in fossil karsts of a dolomitic sabkha interface in overlying limestone. Age of deposition interpreted as Cretaceous(?).	Alaska

P07-14	Nikolai	P	07	14	61 28 00N	142 41 00W	61.4666666666667	-142.683333333333	6128'N	14241'W	Cu-Ag quartz vein	Cu, Ag		Grab sample with 1% Cu	Wrangell Mountains	Moffit and Capps, 1911; Miller, 1946; MacKevett and Smith, 1968	Two quartz veins, each less than 1 m thick, with bornite, chalcopyrite, bornite, pyrrhotite, and secondary copper, and iron minerals.  Quartz-calcite gangue.  Veins in shear zone near top of the Middle and (or) Upper Triassic Nikolai Greenstone.  Deposit known to natives in late 1800's.  More than 100 m of underground workings.  Developed in 1899 but little work since.	Alaska

P07-15	Westover	P	07	15	61 24 00N	142 30 00W	61.4	-142.5	6124'N	14230'W	Kennecott Cu	Cu, Ag		Channel samples with abundant Cu, 50 g/t Ag, 0.2% As.  Grab sample with >2% Cu, 50 g/t Ag, 0.2% As	Wrangell Mountains	Moffit and Capps, 1911; Moffit, 1918; Miller, 1946; MacKevett and Smith, 1968; MacKevett, 1976	Wedge-shaped pods and veins of disseminated to massive bornite-rich ore, with minor chalcocite, malachite, and chalcopyrite; in lower part of the Upper Triassic Chitistone Limestone.  Largest pod 10 m long and 3 m wide.  Limestone locally silicified near ore.  More than 400 m of underground workings.  Development and minor production from 1911 to 1920.  Similar to Kennecott deposit.	Alaska

P07-16	Nelson (Glacier Creek)	P	07	16	61 27 00N	142 23 00W	61.45	-142.383333333333	6127'N	14223'W	Kennecott Cu	Cu, Ag		Abundant Cu; grab samples with >2% Cu, 50 g/t Ag, 0.3% As	Wrangell Mountains	Miller, 1946; Sainsbury, 1951; MacKevett and Smith, 1968; MacKevett, 1976; Still and others, 1991	Stringers and discontinuous masses of disseminated to massive chalcocite and covellite with minor enargite, bornite, malachite, chalcopyrite, native copper, and pyrite in basal parts of fault block of the Upper Triassic Chitistone Limestone.  Local faulting and shearing.  Minor production from 1929 to 1930.  Several pits, five short adits, and a few hundred meters of underground workings.  Similar to Kennecott deposit.	Alaska

P07-17	Erickson	P	07	17	61 25 00N	142 15 00W	61.4166666666667	-142.25	6125'N	14215'W	Basaltic Cu	Cu		Grab samples with >2% Cu, 70 g/t Ag	Wrangell Mountains	Miller, 1946; MacKevett and Smith, 1968; MacKevett, 1976	Massive to disseminated native copper, tenorite, cuprite, and minor amounts of other Cu minerals in irregular masses, thin veins, and stringers in rubbly upper parts of flows, and to lesser extent, in amygdules and quartz-epidote veins in the Middle and (or) Upper Triassic Nikolai Greenstone.  Most of copper fine-grained; copper masses to 27 kg.  Minor production in 1917.  About 100 m of underground workings.	Alaska

P07-18	Wellgreen	P	07	18	61 28 00N	139 31 18W	61.4666666666667	-139.521666666667	6128'N	13931'W	Gabbroic Ni-Cu	Ni, Cu, PGE		Medium.  Reserves of 50 million tonnes grading 0.36% Ni, 0.35% Cu, 0.51g/t Pt, 0.34  g/t Pd.	Eastern Alaska Range	Campbell, 1976; Hulbert and others, 1988; EMR Canada, 1989; Mining Review, 1991.	Consists of massive pyrrhotite, pentlandite, chalcopyrite and magnetite lenses that are scattered along the footwall contact of a steeply dipping fault zone in gabbroic rocks of the Late Triassic Quill Creek Complex. Deposit occurs within a 130 km belt of Ni-Cu-Co-PGE occurrences that are hosted in the Pennsylvanian Skolai Assemblage that includes the Canalask deposit at  White River.  Cu-Ni sulfides are disseminated within mafic dikes and peridotite.  Production in 1972-73.  Deposit age interpreted as Late Triassic. 	Canada

P07-19	Bullion Creek	P	07	19	60 59 00N	138 39 00W	60.9833333333333	-138.65	6059'N	13839'W	Strataform gypsum	Gypsum		Medium (estimate). 	Eastern Alaska Range	Dawson and others, 1991; Gordey and others, 1991.	Consists of thick gypsum beds that occur in limestone of the Upper Triassic Nizina Formation for a length of 5 km. Small veins of chalcopyrite occur in vicinity.  Deposit age interpreted as Upper Triassic. 	Canada

P08-01	Keno Hill (Galena Hill)	P	08	01	63 55 00N	135 15 00W	63.9166666666667	-135.25	6355'N	13515'W	Ag polymetallic vein	Ag, Pb, Zn, Cd		Medium.  Production of 4.87 million tonnes grading 1412 g/t Ag , 6.8% Pb, 4.6% Zn, 0.02 g/t Au.	Tombstone	Watson, 1986; EMR Canada, 1989; Lynch, 1989; Murphy and Roots, 1992; Yukon Minfile, 1992.	Consists of argentiferous galena, freibergite, and pyrargyrite with minor polybasite, stephanite, argentite and native silver that occur as fault veins, breccias and sheeted zones. Deposit hosted predominantly within the Keno Hill Quartzite of the Early Mississippian Upper Earn Group that forms part of a Devonian- Mississippian clastic wedge.  Two stages of veining occur: an earlier stage of quartz-pyrite-arsenopyrite-sulphosalts and trace gold that formed prior to movement on fault veins; and a post-fault set of siderite-galena-sphalerite-pyrite-friebergite-pyrargyrite.  K-Ar isotoic age of 90 Ma age interpreted as age of deposit and may be related to granitoid intrusions of similar age north and south of Keno Hill. Between 1921 and 1988 production of 6769 t of Ag, half of which came from the Elsa, Keno No. 9, Lucky Queen, Silver King, Sadie-Ladue and Husky Mines.  More than 65 ore deposits and prospects occur in the area.  Deposit age interpreted as mid-Cretaceous. 	Canada

P08-02	Marg	P	08	02	64 00 42N	134 28 18W	64.0116666666667	-134.471666666667	6401'N	13428'W	Kuroko Zn-Pb-Cu massive sulfide	Zn, Pb, Cu, Ag, Au		Medium.  Estimated 2.097 million tonnes grading 5.0%  Zn , 2.7% Pb, 1.8%Cu, 65g/t Ag, 1.2 g/t Au.	Dempster	EMR Canada, 1989; Eaton, written commun., Archer, Cathro, and Associates, 1989; Yukon Minfile, 1991.	Consists of pyrite, sphalerite, chalcopyrite and galena with minor arsenopyrite and tetrahedrite that occur in a quartz and barite gangue. Deposit hosted in altered and deformed metavolcanic and metasedimentary rocks of Devonian-Mississippian age.  Host rocks are tectonically interleaved  with, and overlain by the Keno Hill quartzite of the Upper Earn Group, part of a Devonian and Mississippian clastic wedge.  Deposit consists of four stacked massive sulfide lenses that occur at the contact of quartz-sericite-chlorite phyllite and graphitic phyllite.  Deposit is banded and zoned.  Deposit age interpreted as Carboniferous.  	Canada

P08-03	Craig (Tara, Nadaleen Mtn)	P	08	03	64 10 00N	133 22 00W	64.1666666666667	-133.366666666667	6410'N	13322'W	Ag polymetallic vein	Pb, Zn, Ag, Au		Medium.  Reserves of 6.1 million tonnes grading 13.3% Zn, 8.2% Pb, 106 g/t Ag.	Tombstone	Yukon Minfile, 1990; Mining Review, 1992.	Consists of galena and sphalerite with accessory pyrite and tetrahedrite, and rare chalcopyrite, realgar and orpiment. Deposit hosted in silicified dolomite breccia which occurs within brown-weathering and green recessive weathering Carboniferous(?) shales.  Five occurences are known over a distance of 6.5 km.  Ag concentrations interpreted as secondary mineralization.  Reserves range up to 0.69 g/t Au. Deposit age interpreted as Cretaceous(?). 	Canada

P08-04	Minto Copper (Def)	P	08	04	62 36 00N	137 15 00W	62.6	-137.25	6236'N	13715'W	Porphyry Cu-Au	Cu	Au, Ag	Medium.  Reserves of 6.55 million tonnes grading 1.87% Cu, 0.51 g/t Au.	Klotassin	Pearson and Clark, 1979, EMR Canada, 1989; Minto Explorations Ltd., news release, January 25, 1994.	Consists of disseminated chalcopyrite, bornite, magnetite and pyrite with minor hessite and native gold that occur in zones of moderate to strong gneissic foliation in diorite of the Triassic Klotassin Batholith.  Deposit interpreted as a metamorphosed porphyry Cu deposit.  Deposit age interpreted as Late Triassic. 	Canada

P08-05	Cash, (Klazan, Johnny)	P	08	05	62 25 48N	137 37 06W	62.43	-137.618333333333	6226'N	13737'W	Porphyry Cu-Mo	Cu, Mo		Medium.  Resource of 40 million tonnes grading 0.17% Cu, 0.018% MoS2, 0.2 g/t Au.	East-Central Alaska	Sinclair, 1986; EMR Canada, 1989; Yukon Minfile, 1991.	Consists of two zones of pyrite, chalcopyrite and molybdenite that occur as fracture filling, in quartz veins and as disseminations. Deposit hosted in altered Late Cretaceous Mt Nansen Group feldspar porphyry stock and adjacent Paleozoic metamorphic rocks.  Reserves are for the Cash occurrence.  K-Ar isotopic age of 68.2 Ma  1.6 Ma interpreted as age of mineralization.  Deposit age interpreted as Late Cretaceous.	Canada

P08-06	Granite Mountain	P	08	06	62 19 00N	136 58 00W	62.3166666666667	-136.966666666667	6219'N	13658'W	Porphyry Cu-Mo	Cu, Mo		Medium: (estimate).  Approximate grade of 1% Cu.	East-Central Alaska	Yukon Minfile, 1991.	Consists of pyrite and chalcopyrite that occur as disseminations and in fracture veinlets, and molybdenite that occurs in quartz veinlets. Deposit hosted in hornblende diorite of the Klotassin batholith, a mid-Cretaceous granitic to dioritic stock, and along the contact between the two.  Alteration varies from propylitic to argillic with potassic alteration associated with veinlet fractures.  Best intersection graded 0.31% Cu for 12.2 meters.  Average grade of about 1% Cu based on diamond drilling.  Deposit age interpreted as Late Cretaceous. 	Canada

P08-07	Williams Creek	P	08	07	62 21 00N	136 42 00W	62.35	-136.7	6221'N	13642'W	Porphyry Cu-Au	Cu	Ag, Au, Mo	Medium.  Reserves of 10.5 million tonnes grading 1.08% Cu, 0.44 g/t Au.	Klotassin	Pearson and Clark, 1979; EMR Canada, 1989; Western Holdings Ltd., annual report, 1992.	Consists of chalcopyrite, bornite, pyrite and minor arsenopyrite and molybdenite that occur as interstitial grains parallel with the gneissic foliation in granodiorite of the Triassic Klotassin Batholith.  Lower Jurassic regional metamorphism has destroyed much of the original features of the deposit.  An oxidized zone up to 200 meters deep contains malachite and azurite replacing copper sulfides.  Deposit age interpreted as Late Triassic. 	Canada

P08-08	Faro (Anvil)	P	08	08	62 21 36N	133 22 00W	62.36	-133.366666666667	6222'N	13322'W	Sedimentary exhalative Pb-Zn	Zn, Pb, Ag	Cu, Ba, Au	Large.  Pre-production reserves of 57.6 million tonnes grading 4.7% Zn, 3.4% Pb, 36 g/t Ag, 1 g/t Au.	Anvil	Jennings and Jilson, 1986; MacIntyre, 1991; Yukon Minfile, 1991.	Consists of massive pyrite, sphalerite, galena, pyrrhotite, chalcopyrite and marcasite with patchy barite and trace tetrahedrite, bournonite and arsenopyrite and a siliceous gangue. Deposit occurs approximately 100 meters stratigraphically below the contact between phyllite and quartzite of the Lower Cambrian Mt. Mye Formation and calcareous sedimentary rocks of the Cambrian and Ordovician Vangorda Formation .  Higher grades are associated with the presence of barite.  Hosted by sedimentary rocks of western Selwyn basin that are interpreted as part of a Cambrian-Devonian passive margin.  Forms deposit of the Anvil district. Deposit age interprreted as Late Cambrian.	Canada

P08-09	Vangorda Creek (Grum, Firth, DY)	P	08	09	62 14 00N	133 02 00W	62.2333333333333	-133.033333333333	6214'N	13302'W	Sedimentary exhalative Pb-Zn	Zn, Pb, Ag	Cu, Au	Large.  Reserves of 59 million tonnes grading 5.5% Zn, 4.0% Pb, 61.4 g/t Ag, 1 g/t Au.	Anvil	Jennings and Jilson, 1986; MacIntyre, 1991; Yukon Minfile, 1991.	Consists of massive sphalerite, galena and pyrite with minor chalcopyrite and traces of tetrahedrite and arsenopyrite that occur as massive sulfide bands. Deposit hosted in the uppermost layers of the Lower Cambrian Mt. Mye Formation, immediately below the contact with carbonate-rich sedimentary rocks of the Cambrian and Ordovician Vangorda Formation interpreted as part of a Cambrian and Devonian passive margin.  Deposit enclosed within an envelope of quartz-muscovite alteration.  Low-grade gold values are associated with chalcopyrite in the lower part of Mt. Mye section in  quartzite and siliceous phyllite.  Reserves are combined data for Dy, Vangorda, Firth and Grum deposits.  Deposit age interpreted as Late Cambrian. 	Canada

P08-10	Swim (Sea, SB)	P	08	10	62 12 48N	133 01 48W	62.2133333333333	-133.03	6213'N	13302'W	Sedimentary exhalative Pb-Zn	Zn, Pb, Ag		Medium.  Reserves of 22.75 million tonnes grading 4.7% Zn, 3.8% Pb, 42 g/t Ag.	Anvil	Jennings and Jilson, 1986; MacIntyre, 1991; Yukon Minfile, 1991.	Consists of massive pyrite, pyrrhotite, sphalerite and galena with minor chalcopyrite and traces of tetrahedrite, bournonite and arsenopyrite. Deposit hosted in phyllite and quartzitie of the Lower Cambrian Mt. Mye Formation immediately below the contact with calcareous sedimentary rocks of the Cambrian and Ordovician Vangorda Formation interpreted as part of a Cambrian and Devonian passive margin.  Deposit age interpreted as Late Cambrian. 	Canada

P08-11	Risby (Cab)	P	08	11	61 52 00N	133 23 00W	61.8666666666667	-133.383333333333	6152'N	13323'W	W skarn	W	Cu, Mo	Large.  Reserves of 3.2 million tonnes grading 0.82% WO3.	Cassiar 	Sinclair, 1986; EMR Canada, 1989; Yukon Minfile, 1990;  Mining Review, 1992.	Consists of two diopside-garnet skarns that occur in Lower Cambrian carbonates that are intruded by granitic sills of the Cassiar plutonic suite.  No. 1 zone has a high pyrrhotite and low chalcopyrite content.  No. 2 zone, which is intruded by a sill, has higher WO3 mineralization and low sulfides.  Reserves of 2.7 million tonnes grading 0.81% WO3 and an additional 500,000 tonnes grading 1% WO3.  Deposit age interpreted as mid-Cretaceous. 	Canada

P08-12	Hopkins (Giltana)	P	08	12	61 17 36N	136 55 00W	61.2933333333333	-136.916666666667	6118'N	13655'W	Cu skarn	Cu	Mo, Ag, Au, W, U	Medium.  Reserves of 600,000 tonnes grading 1.65% Cu (inferred).	Whitehorse	EMR Canada, 1989; Yukon Minfile, 1990.	Consists of magnetite-pyrrhotite-bornite-chalcopyrite skarn with minor molybdenite and scheelite that occur in five or more zones. Skarns hosted in calcareous metasedimentary rocks of the early Paleozoic Nasina Assemblage near contacts with mid- -Cretaceous granodiorite stocks and feldspar porphyry dikes of the Whitehorse Plutonic Suite.  Some dikes contain chalcopyrite and molybdenite.  Deposit age interpreted as mid-Cretaceous. 	Canada

P08-13	Red Mountain (Bug, Fox, Boswell R.)	P	08	13	60 59 00N	133 44 00W	60.9833333333333	-133.733333333333	6059'N	13344'W	Porphyry Mo	Mo	Ag, W, Cu	Large.  Reserves of 187 million tonnes grading 0.167% MoS2 (0.1% cut-off).	Surprise Lake	Sinclair, 1986; EMR Canada, 1989; Dawson, and others, 1991; Yukon Minfile, 1992.	Consists of disseminated molybdenite that occurs in quartz stockwork. Deposit hosted in an altered Late Cretaceous quartz monzonite stock of the Surprise Lake Suite (K-Ar isotopic age of 87.3 Ma  2.0 Ma) and immediately adjacent contact-metamorphosed argillite of the early Paleozoic Nasina Assemblage.  Stock is complex with a classical alteration pattern, and is cut by barren quartz diorite.  Reserves include 21.3 million tonnes grading 0.293% MoS2 using a 0.25% cut-off.  Deposit age interpreted as Late Cretaceous.	Canada

P08-14	Whitehorse Copper Belt (Little Chief, War Eagle, etc.)	P	08	14	60 37 12N	135 03 12W	60.62	-135.053333333333	6037'N	13503'W	Cu skarn	Cu, Au, Ag		Medium.  Production and reserves of 13.2 million tonnes grading 1.4%Cu, 0.7 g/t Au, 8.9g/t Ag (approx.).	Whitehorse	 Watson, 1984; Meinert, 1986; Dawson and others, 1991; Yukon Minfile, 1991.	Consists of twelve calc-silicate skarns with bornite and chalcopyrite, and minor chalcopyrite, native copper, tetrahedrite and molybdenite mineralization. Skarns occur along irregular contacts between Triassic Lewes River carbonates and Cretaceous granodiorite of the Whitehorse Batholith.  Production from 1898-1982 was 142,000 tonnes Cu, 7,090 kg Au and 90,000 kg Ag.  Deposit age interpreted as mid-Cretaceous. 	Canada

P09-01	Jeff (Naomi, Baroid)	P	09	01	63 37 00N	129 40 00W	63.6166666666667	-129.666666666667	6337'N	12940'W	Sedimentary exhalative Ba	Ba		Large.  Reserves of 2.2 million tonnes with specific gravity of 3.49.	MacMillan Pass	Dawson and Orchard, 1982; Yukon Minfile, 1983.	Consists of barite that occurs as discrete spheres from 1 to 5 mm in diameter with internal radial crystalline structure, and as elongated radially crystalline lenses. Deposit hosted by shale of the Middle to Late Devonian Lower Earn Group that are interpreted as part of a Devonian and Mississippian clastic wedge. Barite forms an elongate tabular stratabound body that is exposed at the southeast over a strike length of 200 meters with a thickness of approximately 25 meters.  Deposit age interpreted as Middle and Late Devonian.	Canada

P09-02	Gravity (BA)	P	09	02	63 44 00N	128 52 00W	63.7333333333333	-128.866666666667	6344'N	12852'W	Sedimentary exhalative Ba	Ba		Medium (estimate). 	MacMillan Pass	Yukon Minfile, 1989.	Consists of thin, fissile, bedded barite with pyrite nodules (avg. 1 cm diameter) that occur in Middle and Late Devonian shales of the lower Earn Group  that are interpreted as part of a Devonian and Mississippian clastic.  Barite zone ranges up to 16 meters thick and extends for a strike length of about 650 meters.  Isoclinal folding at the north end of the deposit, where fauulted, has effectively doubled the thickness to over 35 meters.  Deposit age interpreted as Middle to Late Devonian. 	Canada

P09-03	June Creek (Baldwin, Shell)	P	09	03	63 49 00N	127 46 00W	63.8166666666667	-127.766666666667	6349'N	12746'W	Sediment-hosted Cu	Cu, Ag		Medium.  Reserves of 1.4 million tonnes grading 2.8% Cu.	Redstone	Brown and Chartrand, 1983; Yukon Minfile, 1984; Jefferson and Ruelle, 1986;  EMR Canada, 1989.	Consists of pyrite, chalcopyrite and bornite with minor digenite, chalcocite, covellite, malachite and azurite that occur in lensoid stratiform bodies. Deposit hosted in dolomites of the Coates Lake Group of the Windermere Supergroup.  Detritus from eroded copper-bearing basalt flows of the Little Dal Group, that forms part of the underlying Redstone River Formation, are postulated as the source.  Deposit age interpreted as Late Proterozoic. 	Canada

P09-04	Cathy ((Bar, Walt, Hess))	P	09	04	63 16 30N	130 33 00W	63.275	-130.55	6317'N	13033'W	Sedimentary exhalative Ba	Ba, (Pb, Zn, Ag)		Medium.  Reserves of 453,500 tonnes grading 100% BaSO4.	MacMillan Pass	Dawson and Orchard, 1982; Abbott, 1986; EMR Canada, 1989; Yukon Minfile, 1990.	Consists of fve barite beds that occur within a 60 meter-thick, 2 km-long sequence of cherty argillite, chert, siltstone and partially baritic sandstone, minor limestone and conglomerate of the Givetian (Middle Devonian) basal unit of the Middle to Late Devonian lower Earn Group. Host rocks interpreted as part of a Devonian-Mississippian clastic wedge. Sphalerite, galena and tetrahedrite occur in witherite (barium carbonate) at the Hess zone.  A rough zonation exists with brecciated witherite in the core grading outward to layers of massive barite and finally laminated barite.  Deposit age interpreted as Middle Devonian.	Canada

P09-05	MacTung (MacMillan Tungsten)	P	09	05	63 17 06N	130 09 12W	63.285	-130.153333333333	6317'N	13009'W	W skarn	W, Cu	Mo, Zn	Large - World Class.  Reserves of 57 million tonnes grading 0.96% WO3.	Selwyn	Atkinson and Baker, 1986; Sinclair, 1986; EMR Canada, 1989; Dawson and others, 1991; Mining Review, 1992.	Consists of scheelite, pyrrhotite and minor chalcopyrite in several pyroxene-garnet skarns formed in Cambrian to Ordovician limestone and limestone breccia. Host rocks are part of a folded outer shelf carbonate-pelite sequence of a Cambrian and Devonian passive margin. Host rocks flanked and inferred to be underlain by the Late Cretaceous quartz monzonite Mactung stock (K-Ar isotopic age of 89 Ma  4 Ma)  of the Selwyn Plutonic Suite.  Hydrothermal alteration has produced three distinct, concentric skarn zones: peripheral garnet-pyroxene marble skarn; an intermediate pyroxene skarn; and a central pyroxene-pyrrhotite skarn.  Deposit age interpreted as Late Cretaceous.	Canada

P09-06	MacMillan Pass (Tom, Jason East, Jason Main)	P	09	06	63 09 30N	130 12 00W	63.1583333333333	-130.2	6310'N	13012'W	Sedimentary exhalative Pb-Zn	Pb, Zn, Ag, Ba		Large.  Reserves of 23.4 million tonnes grading 7.3% Pb, 6.4% Zn, 75.7 g/t Ag.	MacMillan Pass	Abbott, 1986; Dawson and Orchard, 1982; Bailes and others, 1986; Turner, 1990; MacIntyre, 1991; Mining Review, 1992.	Deposits occur in two or more stratigraphic intervals in the Middle to Late Devonian lower Earn Group, interpreted as part of a Devonian and Mississippian clastic wedge in the MacMillan Pass area. Deposits interpreted as spatially related to syndepositional faults bounding a rift-related trough filled with fine- to coarse-grained siliceous turbiditic clastics.  Recent reserve figures are 9.3 million tonnes grading 7.5% Pb, 6.2% Zn and 69.4 g/t Ag for the Tom deposit, and 14.1 million tonnes grading 7.09% Pb, 6.57% Zn and 79.9 g/t Ag for the Jason deposits.  Deposit age interpreted as Late Devonian. 	Canada

P09-07	Tea (Brock)	P	09	07	63 01 12N	130 36 48W	63.02	-130.613333333333	6301'N	13037'W	Sedimentary exhalative Ba	Ba		Large.  Reserves of 250,000 tonnes grading 100% BaSO4 (S.G.= 4.24).	MacMillan Pass	Dawson and Orchard, 1982; Yukon Minfile, 1991.	Consists of a barite-rich zone approximately 100 meters thick that occurs at the base of a shale member of the Early Mississippian upper Earn Group that is interpreted as part of a Devonian-Mississippian clastic wedge.  Barite is of high quality and suited for use as drill mud with only screening.  Reserves are for an open-pit mining with no strip ratio, which had limited production.  Deposit age interpreted as Early Mississippian. 	Canada

P09-08	Moose (Spartan, Racicot)	P	09	08	63 04 00N	130 12 00W	63.0666666666667	-130.2	6304'N	13012'W	Sedimentary exhalative Ba	Ba		Medium.  Reserves of 3.0 million tonnes grading 84% BaSO4, 12% to 14% SiO2.	MacMillan Pass	Dawson and Orchard, 1982; Yukon Minfile, 1991.	Consists of finely laminated barite that occurs in two beds from 25 to 45 meters thick and exposed for 200 to 250 meters along strike. Deposit occurs near the base of a shale member of the Middle to Late Devonian lower Earn Group, immediately above an underlying chert pebble conglomerate. Host rocks interpreted as part of a Devonian and Mississippian clastic wedge).  Deposit age interpreted as Late Devonian. 	Canada

P09-09	Oro (Buc, Mar, Dar, Tang)	P	09	09	62 37 00N	129 46 00W	62.6166666666667	-129.766666666667	6237'N	12946'W	Sedimentary exhalative Ba	Ba	Zn, Pb	Medium.  Estimated 1 million tonnes.	MacMillan Pass	Dawson and Orchard, 1982; Yukon Minfile, 1984.	Consists of thinly bedded barite with minor sphalerite and galena that occur as a lens-shaped deposit 1100 meters long, 15 to 50 meters wide and up to 50 meters thick. Hosted in Middle Devonian  turbiditic siltstones of the lower Earn Group that form part of a Devonian and Mississippian clastic wedge. Deposit age interpreted as Middle Devonian.	Canada

P09-10	Anniv (OP)	P	09	10	62 34 00N	129 31 00W	62.5666666666667	-129.516666666667	6234'N	12931'W	Sedimentary exhalative Pb-Zn	Zn, Pb		Large.  Reserves of 61 milion tonnes grading 5.4% Zn, 2.1% Pb.	Howards Pass 	Morganti, 1981; Yukon Minfile, 1984; EMR Canada, 1989; MacIntyre, 1991.	Consists of sphalerite and galena that comprise saucer-shaped stratiform and stratabound bodies in Lower Silurian cyclic, rift-related carbonaceous mudstone and chert of the Ordovician to Silurian Road River Group. Host rocks interpreted as part of a Cambrian and Devonian passive margin.  Deposit averages 13 meter thick (maximum 45 meters) over a 1.5 km strike length.  Anniv deposit is one of three related exhalative Zn-Pb deposits of the Howards Pass Area (refer to Howards Pass).  Deposit age interpreted as Early Silurian. 	Canada

P09-11	Coates Lake (Redstone)	P	09	11	62 41 30N	126 37 30W	62.6916666666667	-126.625	6242'N	12638'W	Sediment-hosted Cu	Cu, Ag		Large.  Reserves of 37 million tonnes grading 3.9% Cu, 11.3 g/t Ag.	Redstone	EMR Canada, 1989; Ruelle, 1982; Jefferson and Ruelle, 1986; Yukon Minfile, 1987; Chartrand and others, 1989.	Consists of pyrite, chalcopyrite, bornite, digenite, chalcocite and covellite with secondary malachite and azurite that occur as stratabound disseminations. Deposit hosted in Late Proterozoic Coates Lake Group shallow marine algae carbonates and evaporites along a transgressive contact with underlying continental redbeds of the Redstone River formation.  Deposit age interpreted as Late Proterozoic. 	Canada

P09-12	Howards Pass (XY)	P	09	12	62 28 00N	129 10 00W	62.4666666666667	-129.166666666667	6228'N	12910'W	Sedimentary exhalative Pb-Zn	Zn, Pb		Large - World Class.  Reserves of 422 million tonnes grading 5.4% Zn, 2.1% Pb.	Howards Pass 	Morganti, 1981, Placer Developments Ltd., annual report, June, 1982; Yukon Minfile, 1984; Abbott and others, 1986; MacIntyre, 1991; 	Consists of sphalerite and galena with pyrite as stratiform and stratabound massive bodies, up to 50 meters thick and 3 to 4 km long, that occur in carbonaceous, cyclical, limy mudstone and chert of the rift-related Lower Silurian "Active Zone" of the Ordovician to Devonian Road River Group. Host rocks are interpreted as part of a Cambrian to Devonian passive margin.  The Howards Pass (XY) deposit is one of three related SEDEX Zn-Pb deposits (refer to Anniv and OP) that occupy an elongate 20 km-wide sub-basin of the eastern Selwyn Basin. Deposits are interpreted as forming at the base of the continental slope about 10  km to 20 km seaward of the carbonate platform margin.  Total reserves for the XY and Anniv deposits are 125 million tonnes grading 5.4% Zn, 2.1% Pb, and estimated resource for the two is  about 400 million tonnes at similar grade.  Deposit age interpreted as Early Silurian. 	Canada

P09-13	Lened (Rudi, Godfrey)	P	09	13	62 22 30N	128 37 00W	62.375	-128.616666666667	6223'N	12837'W	W skarn	W, Cu	Mo	Medium.  Resource of 750,000 tonnes grading1.17% WO3.	Selwyn	Yukon Minfile, 1986; Glover and Burson, 1986; EMR Canada, 1989.	Consists of scheelite and chalcopyrite in garnet-diopside and massive pyrrhotite skarn that replace limestone of the Cambrian to Ordovician Rabbitkettle Formation. Host rocks interpreted as part of a Cambrian to Devonian passive margin and are intruded by a mid-Cretaceous (85-92 Ma) quartz monzonite stock of the Selwyn Plutonic Suite.  Deposit is best developed in an imbricate fault zone.  Deposit age interpreted as mid-Cretaceous. 	Canada

P09-14	Cantung (Canada Tungsten)	P	09	14	61 57 00N	128 15 00W	61.95	-128.25	6157'N	12815'W	W skarn	W, Cu	Zn, Bi	Large - World Class.  Production and reserves of 5.7 million tonnes grading 1.6% WO3, 0.2% Cu.	Selwyn	Mathieson and Clark, 1984; Sinclair, 1986; EMR Canada, 1989; Yukon Minfile, 1990; Dawson and others, 1991.	Consists of pyrrhotite, scheelite and chalcopyrite with minor sphalerite in diopside skarn bodies that replace two members of Lower Cambrian limestone. Host rocks are interpreted as part of a Cambrian to Devonian passive margin. Skarns related to intrusion of a  Late Cretaceous quartz monzonite (K-Ar age of 94.6 Ma  2.6 Ma)  of the Selwyn Plutonic Suite.  Two deposits occur, the Pit orebody that produced 1.51 million tonnes of ore yielding 40,087 tonnes of WO3 between 1962 and 1986, and the E-Zone orebody with reserves of 4.2 million tonnes with 1.6% WO3 and 0.23% Cu with associated  bismuth.  Deposit age interpreted as Late Cretaceous.	Canada

P09-15	Matt Berry	P	09	15	61 29 00N	129 24 00W	61.4833333333333	-129.4	6129'N	12924'W	Sedimentary exhalative Pb-Zn	Pb, Zn, Ag, Cu, Sb		Medium.  Reserves of 533,434 tonnes grading 6.81% Pb, 4.8% Zn, 102.9 g/t Ag.	Frances Lake	Ostler, 1979; Bremner and Ouellette, 1991.	Consists of massive galena, sphalerite, pyrrhotite and chalcopyrite that occur with minor antimony-silver minerals in Paleozoic phyllite.  Copper and antimony mineralization appears to be related to local Cretaceous intrusive activity and overprints folded Paleozoic sedimentary exhalative mineralization that formed along a Devonian and Mississippian passive margin. Deposit age interpreted as Devonian and Mississippian.	Canada

P09-16	Bailey (Pat)	P	09	16	60 46 00N	128 50 48W	60.7666666666667	-128.846666666667	6046'N	12851'W	W skarn	W, Cu		Medium.  Reserves of 405,454 tonnes grading 1.00% WO3 (estimate).	Selwyn	Dawson and Dick, 1978; EMR Canada, 1989; Yukon Minfile, 1990.	Consists of scheelite with minor pyrrhotite and trace chalcopyrite in three pyroxene skarns that occur over a strike length of over 3 km. Skars formed along contact between Devonian limestone and a mid-Cretaceous granodiorite of the Selwyn Plutonic Suite. Limestone part of a Cambrian-Devonian passive margin. The bulk of the reserves are from the central (B) zone.  Deposit age interpreted as mid-Cretaceous. 	Canada

P09-17	Logan	P	09	17	60 30 06N	130 28 06W	60.5016666666667	-130.468333333333	6030'N	13028'W	Zn-Ag polymetallic vein	Zn, Ag	Cu, Sn	Medium.  Reserves of 12.3 million tonnes grading 6.17% Zn, 26 g/t Ag.	Cassiar 	Yukon Minfile, 1992; EMR Canada, 1989; Mining Review, 1991.	Consists of sphalerite and pyrite, lesser arsenopyrite and chalcopyrite, and rare sulfosalts and cassiterite that occur in multiple phase quartz + ankerite veins, stockworks, breccias and silicified zones that occur in highly altered granodiorite, latite and andesite dikes that intrude the Marker Lake Batholith of the Cassiar Plutonic suite.  Deposit forms a tabular, fault-bounded body.  Sericite, biotite and silica are the dominant alteration minerals.  A high grade zone is centered over a diatreme breccia pipe.  Deposit age interpreted as mid-Cretaceous. 	Canada

P09-18	Sa Dena Hes (Mt. Hundere)	P	09	18	60 31 00N	128 53 00W	60.5166666666667	-128.883333333333	6031'N	12853'W	Pb-Zn skarn and manto	Pb, Zn, Ag		Medium.  Reserves of 4.8 million tonnes grading 4% Pb, 12.7% Zn, 59 g/t Ag.	Selwyn	 Dawson and Dick, 1978, Abbott, 1981; Bremner and Ouellette, 1991; Northern Miner, October 7, 1991.	Consists of massive sphalerite and galena with trace pyrite that occur in four essentially tabular replacement zones (Jewel Box Hill, Gribbler Ridge, Burnick and Attila). Zones occur in Lower Cambrian phyllite and limestone that are interpreted as part of a Cambrian to Devonian passive margin.  Limestone has been altered to coarse actinolite-garnet-diopside skarn  at the Jewelbox Hill zone.  Elsewhere copper-iron skarn with magnetite, pyrrhotite and pyrite occur. Lead to zinc ratio is 1:2 except at the Burnick zone where the ratio is 1:30.  K-Ar isotopic age of 50 Ma for deposit.  Although no major intrusive bodies crop out in the mine area, the mid-Cretaceous Mount Billings batholith is interpreted to underlie the deposit.  Deposit age interpreted as mid-Cretaceous. 	Canada

P09-19	McMillan (Quartz Lake)	P	09	19	60 29 30N	127 56 36W	60.4916666666667	-127.943333333333	6030'N	12757'W	Pb-Zn skarn and manto	Pb, Zn, Ag		Medium.  Reserves of 1.5 million tonnes grading 6.6% Zn, 5.5% Pb, 102 g/t Ag.	Selwyn	Morin, 1981, Vaillancourt, 1982; EMR Canada, 1989; Yukon Minfile, 1991.	Consists of pyrite, galena and sphalerite with minor arsenopyrite, boulangerite, tetrahedrite and chalcopyrite that occur as tabular bodies, lenses and disseminations. Deposit hosted in limy quartzite and argillite of the Upper Proterozoic to Lower Cambrian Hyland Group that are interpreted as part of a Cambrian-Devonian passive margin.  Deposit occurs both concordantly and discordantly to bedding.  Lead isotopes age of 100 Ma age for deposit; age similar to that for nearby intrusives of the Selwyn Plutonic suite.  Deposit age interpreted as mid-Cretaceous.	Canada

P09-20	Mel (Otter Creek)	P	09	20	60 21 06N	127 24 18W	60.3516666666667	-127.405	6021'N	12724'W	Sedimentary exhalative Pb-Zn	Pb, Zn, Ba		Medium.  Reserves of 5.24 million tonnes grading 2.09% Pb, 7.86% Zn, 49% BaSO4.	Unassigned	Miller and Wright, 1986; EMR Canada, 1989; Yukon Minfile, 1991.	Consists of irregular blobs of sphalerite, galena and pyrite that form a stratabound body. Deposit hosted in baritic limey shale at contact between Cambrian and Ordovician limestone and overlying calcareous slate or phyllite of Rabbitkettle Formation. Highest zinc values are associated with sericite-altered mudstone.  Lead isotope age of Devonian age for deposit.  Reserves include 725,000 tonnes to 60 m depth with comparable grades. Deposit age interpreted as either Cambrian and Ordovician or Devonian(?). 	Canada

P09-21	JC (Viola)	P	09	21	60 11 36N	131 41 48W	60.1933333333333	-131.696666666667	6012'N	13142'W	Sn skarn	Sn	Cu, Zn, Ag	Medium.  Reserves of 1.25 million tonnes grading 0.54% Sn.	Cassiar 	Layne and Spooner, 1986; EMR Canada, 1989; Yukon Minfile, 1991.	Consists of malayite, stannite, stanniferous tetrahedrite and cassiterite in hedenbergite-diopside skarn that occur along contact  between Devonian and Mississippian carbonates and porphyritic quartz monzonite of the mid-Cretaceous Seagull Batholith.  A pipe-like breccia of axinite-fluorite mineralization also occurs.  Deposit age interpreted as mid-Cretaceous. 	Canada

P09-22	Logtung (Logjam Creek)	P	09	22	60 00 42N	131 36 36W	60.0116666666667	-131.61	6001'N	13137'W	Porphyry W-Mo	W, Mo	Zn, F, Be, Cu	Large.  Reserves of 230 million tonnes grading 0.104% WO3, 0.05% MoS2.	Cassiar 	Noble and others, 1984; Sinclair, 1986; EMR Canada, 1989; Dawson and others, 1991; Yukon Minfile, 1991.	Consists of disseminated scheelite, molybdenite and powellite with minor associated fluorite and beryl in garnet-diopside skarn, quartz vein stockwork and fractures. Deposit associated with a large quartz porphyry dike related to a nearby mid-Cretaceous quartz monzonite stock (K-Ar isotopic age of109 Ma  2 Ma)  of the Cassiar Suite.  Igneous rocks intrude Pennsylvanian chert,  argillite and quartzite.  Reserves include 55 million tonnes grading 0.16% WO3 and 0.062% MoS2.  Deposit age interpreted as mid-Cretaceous.	Canada

P10-01	Wrigley (Fry Group)	P	10	01	63 10 00N	123 39 00W	63.1666666666667	-123.65	6310'N	12339'W	Southeast Missouri Pb-Zn	Zn, Pb, Ag	Ba, Cu, F	Medium.  Resource of 9 million tonnes grading 10% Pb-Zn, 34.3 g/t Ag (approx.).	Unassigned	Yukon Minfile, 1982; EMR Canada, 1989.	Consists of galena and sphalerite with minor fluorite and tetrahedrite that occur as disseminations in and as fracture and breccia filling in limestone of the Devonian Nahanni Formation. Host rocks interpreted as part of a Cambrian and Devonian passive margin.  Deposit age interpreted as Devonian. 	Canada

P10-02	Prairie Creek (Cadillac)	P	10	02	61 33 30N	124 47 30W	61.5583333333333	-124.791666666667	6134'N	12448'W	Pb-Zn skarn and manto 	Pb, Zn, Ag		Large.  Reserves of 6.2 million tonnes grading 13.0% Zn, 12.0% Pb, 180 g/t Ag.	Selwyn	EMR Canada, 1989; Yukon Minfile, 1991; San Andreas Resources Corp., news releases, 1992, 1993., 1994, 1995.	Consists of galena and sphalerite with minor tetrahedrite and chalcopyrite that occur in quartz-carbonate gangue as lenticular zones 2.5 m to 15 m wide, dipping 45 degrees and vertical.  Twelve zones occur along a strike length of about 10 km.  Deposit hosted in shale and dolomite of the Middle Devonian Arnica Formation that is interpreted as part of a Cambrian and Devonian passive margin.  Deeper drilling in 1992-94 intersected stratabound Pb-Zn-Ag deposit that occurs in four lenses over 22 m  thick and two other zones, all hosted in the  Ordovician Whittaker Formation.  Deposit has characteristics of a manto, but no intrusion is known.  Deposit age interpreted as Ordovician-Devonian? 	Canada

P53-01	Dzhalkan	P	53	01	63 37 47N	136 37 49E	63.6297222222222	136.630277777778	6338'N	13638'E	Basaltic Cu	Cu		Small. Average grade of 0.3 to 4.5% Cu.	Sette-Daban 	Kutyrev, 1984; Kutyrev and others, 1988.	Consists of disseminated copper in Famennian basalt flows that have a total thickness of 180 m. Flows erupted into shallow water and subaerial environments.  Deposit occurs in horizons from 0.5 to 2.0 m thick in cinders and of amygdaloidal basalt that occur at the top of flows.  Ore minerals are native copper and cuprite with lesser bornite, chalcocite, and chalcopyrite.  Epidosite (epidote + quartz) wallrock alteration occurs locally.  Ore bodies range from 0.3 to 1.0 m thick and up to 100 m long.  Areas of copper mineralization are separated by unmineralized areas of up to several kilometers.  Host basalts are folded, with fold limbs dipping 40 to 60.	Russia

P53-02	Kurpandja	P	53	02	63 31 24N	137 00 59E	63.5233333333333	137.016388888889	6331'N	13701'E	Sediment-hosted Cu	Cu

Sediment-hosted Cu		Medium. Range of 0.45 up to 12% Cu. Resource of approximately 500,000 tonnes Cu.	Sette-Daban	Kutyrev, 1984; Ioganson, 1988.	Consists of more than three stratified horizons of finely disseminated to massive copper ore that is hosted in Upper Devonian to Lower Carboniferous coastal and deltaic sandstone.  Main ore minerals are chalcocite, bornite, chalcopyrite, and pyrite.  Ore bodies range from 0.2 up to 4 m thick and up to 1.5 km long.  Host polymictic sandstone contains pyroclasts of various types of volcanic rocks. Deposit occurs in a stratigraphic interval from 50 up to 300 m thick that is underlain by Famennian basalt that also contains copper mineralization.  Deposit occurs within a major syncline that has an amplitude of up to 4 km.  Ore bodies and host rocks strike at 40 to 70 on syncline limbs.	Russia

P53-03	Segenyakh	P	53	03	63 10 13N	137 50 44E	63.1702777777778	137.845555555556	6310'N	13751'E	Southeast Missouri Pb-Zn	Pb, Zn, CaF2

Mississippi Pb, Zn		No data.	Sette-Daban 	Kutyrev, 1984.	Consists of concordant horizons of disseminations, stringers, and breccia layers of sphalerite and fluorite that are hosted in Late Silurian (Ludlovian) dolomitized limestone that is overlied by Prjidolian marl.  Ore composed of dolomite, calcite, fluorite, sphalerite, and less common galena.  Ores locally associated with metasomatic quartz, microcline, hyalophane, and pyrite.  Bedded breccia contains up to 20% sphalerite and 15% fluorite.  In addition to concordant breccia layers are cross-cutting breccia veins, that contain up to 70% fluorite and up to 8% sphalerite.  At least two ore-bearing horizons are known that trend north-south for 10 km and dipping eastward from 40 to 60.  Distribution and concentration of mineralization is irregular.	Russia

P53-04	Onello (Lider)	P	53	04	62 22 44N	137 51 58E	62.3788888888889	137.866111111111	6223'N	13752'E	Au quartz vein	Au		Small. Up to 264 g/t Ag. Au grade unknown	Allakh-Yun	Kokin, 1987.	Consists of quartz veins and stringers that are hosted in Late Devonian diabase dikes.   Vein minerals are quartz, bornite, and pyrite. Veins range from 0.3 to 0.5 m thick and are short. Host dikes intrude Ordovician and Cambrian carbonate rocks. 	Russia

P53-05	Svetly	P	53	05	61 27 46N	137 18 33E	61.4627777777778	137.309166666667	6128'N	13719'E	Au quartz vein	Au		Small. Average grade of 0.6-3.2 g/t Au.	Allakh-Yun	Kirusenko, written commun., 1963.	Veins are hosted by Late Proterozoic (Riphean) clastic and carbonate deposits.	Russia

P53-06	Bular	P	53	06	61 13 20N	137 49 38E	61.2222222222222	137.827222222222	6113'N	13750'E	Au quartz vein	Au		Small. Average grade of 24 g/t Au.	Allakh-Yun	T.S. Kirusenko, written commun., 1964; Grinberg and others, 1970.	Consists of disseminated galena, sphalerite, arsenopyrite, and gold in a quartz vein that is 0.8-1 m thick and up to 1,200 m long.  Vein strikes N30E and dips steeply (60-80).  Vein hosted in Lower Permian sandstone.	Russia

P53-07	Sardana	P	53	07	60 05 33N	136 44 38E	60.0925	136.743888888889	6006'N	13645'E	Southeast Missouri Pb-Zn	Pb, Zn		Medium to large.  Reserves of more than 1.0  million tonnes Pb+Zn. Pb:Zn ratio of 1:3-4.	Sette-Daban 	 Kuznetsov, 1979; Ruchkin and others, 1979; Kutyrev and others, 1989.	Consists of disseminated, banded, massive, and breccia and ore and stringers that occur within and adjacent to a dolomite bioherm that ranges from 50-80 m thick. Bioherm hosted in the Late Proterozoic (Upper Vendian) Yudom Formation dolomite.  Ore bodies are lenticular, ribbon-like, and cylindrical in form, and are mostly confined to the overturned limb of a syncline. Limb dips eastward at 75-85.  Ore bodies range up to 40 m thick and are 200 to 300 m long at depth.  Drilling indicates additional ore bodies occur at a depth of 200 tp 300 m.  Most ore associated with metasomatic, sugar-textured dolomite and zebra (brown and white striped) dolomite.  Main ore minerals are sphalerite, galena, calcite, and dolomite.  Subordinate ore minerals are pyrite, maracasite, arsenopyrite, quartz, and anthraxolite.  Oxidized ore minerals include:  smithsonite, cerussite, anglesite, goethite, hydrogoethite, and aragonite. Low-grade disseminations occur in Upper Proterozoic (Upper Vendian) dolomite for many kilometers in both limbs and in the axis of a north-south-trending syncline that is 3 km wide and more than 10 km long.  Dolomite of Yudom Formation is 200 m thick and transgressively overlies Upper Proterozoic (Upper Riphean) quartz and quartz-feldspar sandstone and siltstone that in turn is conformably overlain by Lower Cambrian variegated clay and carbonate rocks.  Deposit intruded by sparce diabase and dolerite dikes. 	Russia

P54-01	Pil	P	54	01	63 48 33N	143 38 16E	63.8091666666667	143.637777777778	6349'N	14338'E	Au quartz vein	Au		Small. Contains up to 1.3 kg/t Au.	Yana-Kolyma	Korostelev, written commun. 1963; Rozhkov and others, 1971.	Consists of quartz veins from 0.2 to 1.5 m thick and 100 to 500 m long. Veins contain ankerite, calcite, pyrite, gold, chalcopyrite, and galena.  Veins intrude  Late Triassic to Early Jurassic sandstone and shale and diorite porphyrite dikes.  Host rocks are contact metamorphosed.	Russia

P54-02	Ergelyakh	P	54	02	63 42 48N	143 52 39E	63.7133333333333	143.8775	6343'N	14353'E	Granitoid-related Au	Au		Small. Average grade of 0.1-90 g/t Au; 0.02-0.8% WO3; Locally contains up to 1.37% Bi; up to 0.4% Te; up to 2% As.	Yana-Kolyma	Apeltsyn and Saveliev, 1962; Korostelev, written commun., 1963; Roshkov and others, 1971; Gamyanin, N.A. Goryachev, Bakharev, and others, written commun., 1990.	Consists of variously-oriented quartz veins and stringers that occur along the contact of an Early Cretaceous granodiorite and Upper Triassic terrigenous deposits.  Quartz constitutes 90% of the veins, which also include tourmaline, muscovite, wolframite, arsenopyrite, cobaltite, niccolite, bismuth, bismuthine, gold, joseite, and other Te and Bi minerals.  Ore bodies are cut by crush belts that contain comb quartz, galena, sphalerite, Ag-tetrahedrite, and pyrargyrite that are part of epithermal veins with high Ag grades, up to 200 g/t Ag.	Russia

P54-03	Baryllyelakh	P	54	03	63 34 42N	143 53 36E	63.5783333333333	143.893333333333	6335'N	14354'E	Sn greisen	Sn, W		Small. Up to 0.74% Sn; 0.24% WO3 .	Yana-Kolyma	Rudich, 1958; Korostelev, written commun., 1963; Gracheva, 1974; Ganyanin and Goryachev, 1977.	Consists of greisen zones that occur near the contact and in the apical portion of a Late Cretaceous biotite granite intrusion.  Greisen zones range up to 100 by 600 m and up to 120 m thick.  Greisen composed of tourmaline, quartz, muscovite, dumortierite, andalusite, pyrophyllite with disseminated wolframite, cassiterite, molybdenite, arsenopyrite, lllingite, pyrrhotite, chalcopyrite, monazite, xenotime, and Bi minerals.	Russia

P54-04	Baryllyelakh-Tsentralny	P	54	04	63 26 19N	143 48 06E	63.4386111111111	143.801666666667	6326'N	14348'E	Sn polymetallic vein	Sn, Ag		Small. Average grade of 0.03-11.35% Sn;  0.9% Pb; up to 2.28% Zn; up to 76 g/t Ag.	Eastern Asia-Arctic: Verkhne-Kolyma	Rudich, 1958; Korostelev, written commun. 1963.	Consists of sixteen breccia zones that range from 0.3 to 20 m thick and up to 700 m long that occur in Lower Cretaceous volcanic rocks. Zones composed of quartz, chlorite, kaolinite, calcite, pyrite, cassiterite, chalcopyrite, galena, sphalerite, pyrrhotite, and other minerals.  Volcanic rock exhibit chloritie and silicifica alteration.  A thick oxidation zone is present.	Russia

P54-05	Senduchen	P	54	05	63 21 04N	138 23 59E	63.3511111111111	138.399722222222	6321'N	13824'E	Sb-As vein	As, Sb		Small. Average grade of 10-58% As; 2.9% Sb.	Verkhoyansk-Indigirka	Korostelev, written commun., 1963.	Consists of quartz-carbonate veins that contain orpiment, stibnite, realgar, arsenopyrite, sphalerite, enargite, chalcopyrite, and jamesonite. Individual orpiment concretionsrange up to 10 tons. Veins intrude dark grey Silurian limestone, range up to 3.5 m thick, and occur in a fault zone that cuts an anticline.  	Russia

P54-06	Stibnitovoe	P	54	06	63 13 36N	138 29 39E	63.2266666666667	138.494166666667	6314'N	13830'E	Sb vein	Sb	Cu, Pb, As	Small. Up to 1.37% Sb; up to 0.81% Cu; up to 0.5% Pb; up to 0.17% As.	Verkhoyansk-Indigirka	Korostelev, written commun. 1963;  N.A. Goryachev, written commun., 1992.	Consists of a vertical quartz vein that cuts Devonian limestone.  Vein composed of quartz, calcite, stibnite, sphalerite, tetrahedrite, chalcostibnite, pyrite, and chalcopyrite. Vein ranges from 0.5 to 2 m thick, more than 250 m long. 	Russia

P54-07	Altaiskoe	P	54	07	63 01 19N	140 42 31E	63.0219444444444	140.708611111111	6301'N	14043'E	Ag polymetallic vein	Pb, Zn, Ag	Sn	Small-to-medium.  Pb:Zn ratio of 2:1.	Vostochno-Verkhoyansk	Indolev and Nevoisa, 1974.	Consists of  Ag polymetallic veins, stockworks, and breccia that occur in small, steeply-dipping faults which trend northeast and occur in narrow zones in gently-dipping Permian siltstone. Fault zones and associated veins occur in the dome of a northeast-trending brachyform anticline. Late Mesozoic lamprophyre and diabase dikes are wide-spread within the deposit.  Main ore minerals are sphalerite, galena, arsenopyrite, and pyrite.  Lesser ore minerals are cassiterite, tetrahedrite, pyrargyrite, polybasite, and scarce owyheeite.  Gangue minerals are quartz, siderite, ankerite, and calcite.  Deposit formed in following stages: (1) arsenopyrite-pyrite-quartz with cassiterite and gold-bearing pyrite;  (2) sphalerite-pyrite-siderite;  (3) galena-ankerite-quartz; (4) galena-quartz-calcite; and (5) sphalerite (red)-jamesonite.  Regional metamorphism occured between stages 2 and 3.  	Russia

P54-08	Imtachan	P	54	08	62 57 16N	139 44 23E	62.9544444444444	139.739722222222	6257'N	13944'E	Sn polymetallic vein	Pb, Zn, Sn		Small.	Vostochno-Verkhoyansk	Indolev and Nevoisa, 1974.	Consists of Sn polymetallic veins that occur in a linear, steeply-dippinging fault zone occurs in Upper Permian sandstone and shale.  Main ore minerals are pyrrhotite, pyrite, sphalerite. Lesser ore minerals are galena, arsenopyrite, maracasite, cassiterite, and stannite.  Gangue minerals are quartz, siderite, and manganankerite.  Deposit occurs in the dome of a plunging brachyform anticline, within the contact metamorphic aureole of an unexposed granitoid intrusion.  	Russia

P54-09	Verkhnee Menkeche	P	54	09	62 56 16N	139 27 14E	62.9377777777778	139.453888888889	6256'N	13927'E	Ag polymetallic vein	Pb, Zn, Ag		Medium.  Average grade of 2.7-11% Pb; 3.9-7.0% Zn; 138-332 g/t Ag.	Vostochno-Verkhoyansk	Korostolev, written commun., 1963; Indolev and Nevoisa, 1974.	Consists of abundant Ag polymetallic lens-like veins that occur in a linear steeply-dipping northeast-trending fault zone in Upper Permian sandstone, siltstone, and shale. Fault zone is about 10 km long and 1 km wide.  Ore bodies occur mostly parallel to the fault zone and dip steeply (55-85).  Ore bodies ranges from hundred of meters to 3.5 km long and from 1 to 10 m (average 3 m) thick.  Main ore minerals are galena, sphalerite, pyrrhotite, arsenopyrite, and pyrite.  Lesser ore minerals are cassiterite, chalcopyrite, magnetite, owyheeite, pyargyrite, tetrahedrite, diaphorite, boulangerite, native silver, and gold.  Gangue minerals are quartz, siderite, ankerite, and calcite. Three stages of mineralization consist of:  (1) sphalerite-quartz-siderite; (2) sulphoantimonite-galena; and (3) sulfide-carbonate.  Regional metamorphism occured between stages 2 and 3.  Mineralized fault zone occurs along the dome of a plunging brachyform anticline. Part of deposit occurs within the contact metamorphic aureole of a Late Cretaceous granitoid intrusion that occurs as stocks and numerous dikes of granite-porphyry and granodiorite-porphyry.  Lamprophyre and diabase dikes are wide-spread.	Russia

P54-10	Levo-Dybin	P	54	10	62 50 14N	139 34 36E	62.8372222222222	139.576666666667	6250'N	13935'E	Granitoid-related Au	Au, W, Bi	Te	Up to 3% As, 7-13 g/t Au, up to 2.5% WO3, up to 1% Bi, and up to 0.6% Te.	Allakh-Yun	Kokin, written commun., 1978; Zubkov, 1984; N.A. Goryachev, written commun., 1993.	Consists of abundant quartz stringers, from 0.2 to 0.3 m thick, that form peculiar sheet stockworks in contact metamorphosed Upper Permian sandstone beds, that range from 5 to 20 m thick. Stringers consists of quartz (90-95%), muscovite, potassium feldspar, scheelite, molybdenite, arsenopyrite, niccolite, lllingite, pyrrhotite, bismuth, gold, bismuthine, Bi tellurides and sulfotellurides, and maldonite. Deposit occurs for 800-1,000 m along the strike of the bedding, above an Early Cretaceous granitoid body and in adjacent country rocks. 	Russia

P54-11	Sakyryr	P	54	11	62 42 33N	138 21 39E	62.7091666666667	138.360833333333	6243'N	13822'E	Southeast Missouri Pb-Zn	Zn, CaF2		No data.	Sette-Daban	Kutyrev, 1984.	Consists of sphalerite and fluorite in beds and in crosscutting breccia zones that are hosted in Upper Silurian (Ludlovian) dolomitized limestone that is overlain by the Upper Sulirian Prjidolian Marl.  Bedded breccias range in thickness from 8 to 45 m.  Fluorite comprises up to 60% of one cross-cutting ore shoot.  Mineralized dolomite zone is 5 km long.	Russia

P54-12	It-Yuryak	P	54	12	62 42 03N	139 38 11E	62.7008333333333	139.636388888889	6242'N	13938'E	W vein, Sn (W)-quartz vein	W	Sn	Small. Average grade of 0.05-5% WO3 .  	Allakh-Yun	Korostelev, written commun., 1963; Silichev and Belozertseva, 1979; Shur, 1985.	Consists of quartz-wolframite and sulfide veins and stringers and stringer lodes that range up to 20 m thick.  Ore bodies range up to 250 m long.  Vein minerals are quartz, wolframite, scheelite, muscovite, cassiterite, beryl, arsenopyrite, galena, and sphalerite.  Veins intrude contact metamorhosed Late Permian siltstone and are associated with minor greisen.	Russia

P54-13	Khoron	P	54	13	62 39 01N	140 49 22E	62.6502777777778	140.822777777778	6239'N	14049'E	Sn polymetallic vein	Sn	Pb	No data.	Verkhne-Yudomsky	Andriyanov and others, 1984; Shur, 1985.	Consists in part of cross-cutting quartz and sulfide-quartz veins, stockworks, and shear zones, from 1 to 1.5 m thick and up to 1 km long. Also consists of conformable sub-sheet stockworks that occur in Permian sandstone, and associated greisen that occurs in Upper Cretaceous dikes and a grandiorite-porphryry stock with a K-Ar isotoopic age of 95-104 Ma.  About 50 minerals occur. Main are minerals are quartz, tourmaline, chlorite, muscovite, carbonate, pyrrhotite, arsenopyrite, galena, sphalerite, cassiterite, stannite, bismuthine, and fluorite.  Post-ore grandiorite porphyry bodies have K-Ar isotopic age of 83 Ma. 	Russia

P54-14	Nezhdaninka	P	54	14	62 33 41N	139 18 34E	62.5613888888889	139.309444444444	6234'N	13919'E	Au quartz vein	Au, Ag		Large.  Proven reserves of 475 tonnes Au.  Estimated resources of more than 500 tonnes Au.  Average minimum grade of 5 g/t Au with up to 6,748 g/t Au, and up to 8,300 g/t Ag.	Allakh-Yun	Korostolev, written commun., 1963; Silichev and Skobelev, 1970; Grinberg and others, 1970; Gamyanin and others, 1985; Gamyanin and others, written commun., 1990; Benevolsky and others, 1992.	Consists of disseminated gold that occurs in: (1) steeply-dipping shear zones up to 40 m thick and 5.4 km long; (2) related tension-gash quartz veins up to 200 m long and 1.2 m thick; and (3) quartz lenses within the shear zones. Vein minerals are quartz, carbonate, arsenopyrite, galena, sphalerite, scheelite, sericite, albite, chalcopyrite, tetrahedrite, lead and copper sulfosalts, stibnite, and gold. Wallrock alteration to silica, sulfides, and sericite. Quartz Ag polymetallic ore bodies cross-cut and post-date feathered quartz-veins.  Deposit occurs along a deep fault that  cuts the core of a doubly-plunging anticline in Upper Carboniferous to Lower Permian sandstone and shale. Deposit extends extends more than 1,000 m vertically. Workings include boreholes and seven levels of adits. 	Russia

P54-15	Zarnitsa, Kutinskoe	P	54	15	62 26 54N	140 17 37E	62.4483333333333	140.293611111111	6227'N	14018'E	Polymetallic vein	Pb, Zn, Ag		Medium. Average grade of 4.86-7.75% Pb, 4.1-5% Zn, and 44-326g/t Ag.	Verkhne-Yudomsky	Korostolev, written commun., 1963.	Consists of two deposits separated by 8 km.  Zaritsa deposit consists of two polymetallic quartz-sulfide veins that contain galena, sphalerite, pyrite, chalcopyrite, and silver minerals. Larger vein is up to 500 m long and 6 m thick.  Zaritsa veins intrude Late Cretaceous granite-porphyry and rhyolite and have a fringe of disseminated sulfides up to 20 m thick. Kutinskoe deposit consists of a vein about 3 m thick and 400 m long that is composed of quartz, pyrite, galena, sphalerite, and pyrrhotite. Kutinskoe vein intrudes contact metamorhosed Upper Permian  sandstone and shale.   	Russia

P54-16	Khaardak	P	54	16	62 02 57N	140 43 39E	62.0491666666667	140.7275	6203'N	14044'E	Sn polymetallic vein	Sn	Au, W, Zn	Small. Average grade of 0.3% Sn; up to 0.02% W; up to 0.04% Zn.	Verkhne-Yudomsky	Volkodav, 1978; Shur, 1985.	Consists of steeply-dipping shear zones that contain quartz-chlorite veins up to 8 m thick and stringers. Veins and stringers occur in a major 15 km by 2 km zone in dacite and adamellite porphyry of the Cretaceous Verkhne-Allak subvolcano.  Ore bodies range up to several kilometers long and tens of meters thick.  Vein and stringer minerals are quartz (20-30%), chlorite, cassiterite, hematite, sericite, fluorite, arsenopyrite, pyrite, chalcopyrite, galena, sphalerite, stannite, fahlore, and gold.  Wallrocks exhibit  chloritie and sericitie alteration.	Russia

P54-17	Dzhaton	P	54	17	61 49 00N	140 14 37E	61.8166666666667	140.243611111111	6149'N	14015'E	Pb-Zn polymetallic vein	Pb, Zn, Ag		Small. Average grade of 8-9% Pb; 8-10% Zn; 100-200 g/t Ag.	Verkhne-Yudomsky	Korostelev, written commun., 1963.	Consists of sulfide veins with galena, sphalerite, pyrite, and quartz that occur in Late Permian sandstone and shale along the contact of a major subvolcanic quartz monzonite-porphyry body of Late Jurassic-to-Early Cretaceous age.  Veins are 0.6 to 3.0 m thick and 300-400 m long.	Russia

P54-18	Novinka	P	54	18	61 41 46N	138 17 18E	61.6961111111111	138.288333333333	6142'N	13817'E	Au quartz vein	Au		Small. Up to 90 g/t Au.	Allakh-Yun	Bobin, 1938; Petrusevich, 1939; Grinberg and others, 1970.	Consists of a quartz vein in Permian clastic deposits. Vein ranges up to 0.9 m thick and 100 m long.  Major minerals are quartz, albite, sericite, native gold (fineness 955), galena, pyrite, sphalerite, and tetrahedrite.  	Russia

P54-19	Molybdenitovy	P	54	19	61 32 48N	142 58 32E	61.5466666666667	142.975555555556	6133'N	14259'E	Porphyry Mo	Mo		Up to 3% Mo.	Eastern Asia-Arctic: Koni-Yablon	Korostolev, written commun., 1963; Gamyanin, 1976.	Consists of stockwork and quartz veins with molybdenite and sparse chalcopyrite that are hosted in biotite granodiorite of the Late Cretaceous Okhoto-Kuhtui pluton. Veins range to 0.4 m thick.	Russia

P54-20	Guan-Ti (Arkhimed)	P	54	20	61 30 13N	143 51 14E	61.5036111111111	143.853888888889	6130'N	14351'E	Porphyry Mo	Mo, W		Average grade of 0.1-0.65% Mo; up to 1% WO3; up to 0.01% Be, Sc, Ga, Bi .	Eastern Asia-Arctic: Koni-Yablon	Korostolev, written commun., 1963.	Consists of a stockwork of quartz-molybdenite veins up to 1 m thick, and quartz-feldspar-mica alteration with molybdenite.  Deposit occurs in an area of 2 km2 within a Late Cretaceous granite pluton.	Russia

P54-21	Nivandzha	P	54	21	61 32 40N	141 13 42E	61.5444444444444	141.228333333333	6133'N	14114'E	Polymetallic vein	Pb, Zn, Ag		Small. Up to 12% Pb; up to 14% Zn; up to 100 g/t Ag.	Verkhne-Yudomsky	Korostolev, written commun., 1963.	Consists of ten polymetallic veins composed of quartz, galena, and sphalerite. Veins are up to 3 m thick and up to 700 m long.  Veins occur along a northeast-trending fault zone in Permian clastic deposits. 	Russia

P54-22	Voskhod	P	54	22	61 22 15N	139 22 19E	61.3708333333333	139.371944444444	6122'N	13922'E	Au quartz vein	Au		No data.	Allakh-Yun	Grinberg and others, 1970.	Consists of quartz veins up to 18 m thick and up to 1,000 m long that locally grade into stringers. Veins composed of quartz, albite, carbonate, arsenopyrite, pyrite, galena, sphalerite, chalcopyrite, and gold.  Veins occur in faults that cut Permian sandstone and shale. Host sandstone exhibit quartz, sericite, albite, and carbonate alteration.	Russia

P54-23	Zaderzhnoe	P	54	23	60 27 28N	138 10 31E	60.4577777777778	138.175277777778	6027'N	13811'E	Au quartz vein	Au		No data.	Allakh-Yun	Barakovsky, 1993.	Consists of sort veins (100-300 m long) and contortion zones, both up to 2 m thick, that generally trend east-west.  Veins are composed of quartz (96-98%), carbonate minerals (1-2%), and sulfides (1-2%) including pyrite, arsenopyrite, galena, sphalerite, chalcopyrite, and native gold (fineness 695-815).  Deposit occurs in the core of an anticline formed in Early Permian black shale, argillite, and siltstone in the Anchin fault zone. Pre-ore diorite porphyrite dikes intrude sedimentary rocks. Mineralization extends vertically about 350 m.  	Russia

P54-24	Khakandzhinskoe (Khakandzha)	P	54	24	60 01 35N	142 35 32E	60.0263888888889	142.592222222222	6002'N	14236'E	Au-Ag epithermal vein	Au, Ag		Medium. Reserves of 7.23 million tonnes ore grading 7 g/t Au and 312 g/t Ag.	Eastern Asia-Arctic: Okhotsk	Sidorov and others, 1970.	Consists of metasomatic rocks that contain kaolinite-quartz and hydromica-quartz assemblages. Ore veins and streaks consist of quartz, adularia, hydromica, carbonate, pyrite, argentite, galena, and native silver and gold.  Ore has an anomalous high Mn content and many Mn minerals.  Deposit occurs in metasomatic rocks that contain a series of veins and streaks bearing gold and silver minerals, in a large fracture zone forming the contact between hypabyssal, highly-alkaline rhyolite and Early to Late Cretaceous andesite and rhyodacite. Age of mineralization interpreted as 80 to 50 Ma. 	Russia

P55-01	Uochat	P	55	01	63 45 00N	148 45 11E	63.75	148.753055555556	6345'N	14845'E	Carbonate-hosted Hg   	Hg		Small.  	Urultun and Sudar Rivers	Babkin, 1975	Disseminated, cinnabar-bearing veinlets occur in brecciated Lower(?) Devonian dolomite along a major north-south trending fault that separates a Devonian carbonate sequence from a Carboniferous and Permian clastic sedimentary sequence.  Ore body is about 20 m long and 4 to 7 m thick.  Main ore mineral is cinnabar, which occurs with calcite in masses and irregular veinlets more than 3 mm thick.  Pyrite, quartz, sphalerite, and anthraxolite are present.  Mineralization consisted of several stages:  (1) pre-ore silicification;  (2) pre-ore calcitization;  (3) deposition of cinnabar and calcite; and  (4) post-ore calcite.  Only magmatic rocks in vicinity are Late Paleozoic diabase bodies interlayered in Carboniferous and Permian clastic sedimentary rocks.	Russia

P55-02	Urultun	P	55	02	63 40 15N	148 41 30E	63.6708333333333	148.691666666667	6340'N	14842'E	Southeast Missouri Pb-Zn	Pb, Zn		Estimated resources 23 million tonnes with average grade about 2.85% Pb, 6.74% Zn, and 10% fluorite.  	Urultun and Sudar Rivers	Shpikerman, 1987	Disseminated veinlets and brecciated ore occur in Lower Devonian (upper Emsian) dolomite overlain with Middle Devonian (Givetian) marl.  Ore bodies are composed of dolomite, calcite, fluorite, galena, sphalerite, and anthraxolite.  Barite, pyrite, and cinnabar are present locally.  Quartz is absent.  Mineralization formed in two stages:  (1) an early sphalerite-fluorite stage which resulted in disseminated metasomatic ore, and  (2) a galena-fluorite-calcite stage which resulted in brecciated and veinlet ores.  Fracturing occurred between these stages.  The ore-bearing dolomite sequence is up to 240 m thick along a synclinal limb of a fold that generally trends northwesterly and dips 50-70 to the northeast.  The limbs of the fold are subhorizontal south of the deposit.  From two to five conformable ore horizons, varying in thicknesses from 1 to 10 m, are known within this dolomite sequence; but ore bodies are sporadic within a given horizon.  Ore zone extends over an area of about 20 by 4 km.	Russia

P55-03	Aida	P	55	03	63 36 03N	144 01 08E	63.6008333333333	144.018888888889	6336'N	14401'E	Au-Ag epithermal vein	Ag, Au		Small.  	Eastern Asia-Arctic: Verkhne-Kolyma	Gamyanin, 1974	Adularia-carbonate-quartz veins with pyrite, chalcopyrite, sphalerite, galena, freibergite, pyrargyrite, miargyrite, stephanite, kstelite, and native silver.  Conjugate to linear zones of quartz-adularia-sericite, quartz-chlorite-kaolinite, and quartz-chlorite-carbonate altered rocks up to 30-40 m thick.  Ore bodies are associated with major east-west trending faults and conjugate northeastern fissures, in hypersthene andesite of the southeastern Taryn volcanic complex.	Russia

P55-04	Terrassnoe	P	55	04	63 32 47N	148 55 31E	63.5463888888889	148.925277777778	6333'N	14856'E	Pb-Zn skarn   	Pb, Zn	Cu, Ag	Probable resource of 5.2 million tonnes ore with average grade about 1% Pb, 5% Zn, and 140 g/t Ag.  	Yasachnaya River	Shpikerman, 1987; V.I. Shpikerman and others,  written commun., 1988.	Consists of skarn with sulfide occurrences along the tectonic contact between Upper Devonian (Frasnian) limestone and Upper Paleozoic aluminous-siliceous sedimentary rocks.  Deposit extends for 700 m and occurs in the bottom of a late Jurassic volcanic depression intruded by hypabyssal dikes overlying a buried Late Mesozoic granitic intrusion.  Skarn is composed of hedenbergite, garnet (andradite-grossular), and ilvaite, and sphalerite. Main ore minerals are sphalerite, galena, chalcopyrite, and magnetite.  Silver occurs mainly in  sulfide minerals, but formed subsequent to the skarn.	Russia

P55-05	Prizovoe	P	55	05	63 28 58N	149 33 56E	63.4827777777778	149.565555555556	6329'N	14934'E	Bedded barite   	Ba		Medium.  	Urultun and Sudar Rivers	Shpikerman, written commun., 1989	Conformable, sheet-like, steeply-dipping deposit of massive white barite in siliceous argillite and siltstone of Lower to Middle Carboniferous age.  Deposit is more than 300 m long and about 30 m wide.  Barite exhibits a relic sedimentary structure in the middle of the deposit.  Ore horizons show evidence of bed-by-bed metasomatic replacement of the host rocks.  Barite-bearing, siliceous clastic sedimentary rocks are intensely deformed and contain numerous interlayers of Late Paleozoic diabase.  Host rocks have an anomalously high background content of Mn, Zn, Cu, Ag, and Ba	Russia

P55-06	Prolivnoe	P	55	06	63 29 34N	149 18 28E	63.4927777777778	149.307777777778	6330'N	14918'E	Southeast Missouri Pb-Zn   	Pb, Zn		Small.  	Urultun and Sudar Rivers	Shpikerman, 1987	Disseminated veinlets, brecciated and banded ores, in dark-gray, diagenetic dolomites of Lower Devonian (Emsian) age.  Ore minerals are galena, sphalerite, and fluorite.  Two stages of mineralization can be distinguished:  (1) sphalerite, which subsequently underwent strong deformation; and  (2) coarsely crystalline white dolomite, calcite, fluorite, galena, and large masses of anthraxolite.  Mineralized dolomite sequence is more 200 m thick and includes two conformable mineralized horizons that trend east-west.  Dolomite is overlain by black carbonaceous shales of late Emsian age.	Russia

P55-07	Batko	P	55	07	63 24 38N	149 42 06E	63.4105555555556	149.701666666667	6325'N	14942'E	Basaltic Cu   	Cu	Ag, Ba	Small.  Grab samples contain up to 3.1% Cu and 13.7 g/t Ag.  	Urultun and Sudar Rivers	Shpikerman and others, 1991	Disseminated and irregular masses of sulfides occur in subalkalic, amygdaloidal basalt flows up to 200 m thick, within folded red beds of Middle Devonian (Givetian) age.  Ore minerals are bournonite, chalcocite, and covellite.  Mineralization is confined to the tops of the basalt flows.  Adjacent trachybasalt is intensely epidotized and carbonatized.  Silver and barium are associated with the copper.  Upper mineralized horizon is no more than 2-3 m thick.	Russia

P55-08	Verkhne-Khakchan	P	55	08	63 14 37N	146 13 51E	63.2436111111111	146.230833333333	6315'N	14614'E	Au quartz vein   	Au		Small. Proven reserves of 0.1 t Au. Inferred resource of 86 t Au. Grade ranges from 0.2 to 7.8 g/t Au. Average grade less than 2 g/t Au.	Yana-Kolyma	Panychev, written commun., 1977	Occurs as linear zones in brecciated and silicified, Upper Permian siltstone and shale.  Ore zones are controlled by northwest- and approximately east-west-trending fractures, which have diverse orientation near fault intersections.  Ore bodies include lenticular and stockwork-like occurrences; areas of near-total silicification; and short, narrow quartz veins.  Quartz makes up 98% of the veins with albite, carbonates, chlorite, tourmaline, sericite, pyrite, arsenopyrite, sphalerite, chalcopyrite, galena, ilmenite, tetrahedrite-tennantite, and gold (700-850 fine).  Deposit is located in the vicinity of the Chai-Yurya strike-slip fault.  Geology and structure are similar to that in the Natalka deposit.	Russia

P55-09	Kontrandya	P	55	09	63 13 24N	146 54 55E	63.2233333333333	146.915277777778	6313'N	14655'E	Au quartz vein   	Au		Small.  Ranges from 1.2 to 2500 g/t Au.  	Yana-Kolyma	Filippov, written commun., 1944; Skornyakov, written commun., 1953	Associated with a northwesterly-trending altered rhyolite dike 6 to 23 m thick.  Deposit occurs in steeply folded sandstone and shale of Early Jurassic age; and is related to the Chai-Yurya strike-slip fault.  Gold ore bodies occur in steeply dipping quartz veins 10-15 cm thick, which cut the dike obliquely over an area approximately 150 m long.  Besides quartz, the veins contain albite, arsenopyrite, pyrite, boulangerite, and gold.	Russia

P55-10	Kuranakh-Sala	P	55	10	63 02 38N	144 19 24E	63.0438888888889	144.323333333333	6303'N	14419'E	Sn silicate-sulfide vein   	Sn		Small.  	Eastern Asia-Arctic: Verkhne-Kolyma	Lugov, 1986	Steeply dipping, quartz-tourmaline veins up to 1.5 m thick in a Lower Cretaceous granitic pluton are composed of cassiterite, magnetite, pyrite, arsenopyrite and chalcopyrite.	Russia

P55-11	Taboga	P	55	11	63 03 57N	148 16 15E	63.0658333333333	148.270833333333	6304'N	14816'E	Au quartz vein   	Au		Small to medium.  Mineralized zones contain traces to 78.9 g/t Au and quartz veins contain up to 3652 g/t Au.  	Yana-Kolyma	Veldyaksov and others, written commun., 1973	About 30 mineralized zones of variable size.  They are located in two en echelon structures related to the Taboga strike-slip fault zone.  Quartz veinlets cement fractured Lower and Middle Jurassic shale, siltstone, and sandstone.  Distinct veins are rare.  Mineralized zones are several hundreds of meters long and several meters thick.  They are composed of about 98% quartz with albite, carbonates, barite, arsenopyrite, pyrite, pyrrhotite, galena, bismuthite, gold and native silver.  Fault which controls the deposit cuts diagonally across a northwest-trending fold structure in the sedimentary sequence, and is parallel to the western contact of a large granitic pluton.	Russia

P55-12	Stakhanov	P	55	12	63 06 00N	147 48 12E	63.1	147.803333333333	6306'N	14748'E	Au quartz vein   	Au		Small.  Ranges from 0.2 to 3800 g/t Au.  	Yana-Kolyma	Skiornyakov, written commun., 1953	Lenticular quartz veins and zones of quartz veinlets occur along the walls of gently dipping dikes of hydrothermally altered rhyolite, and are partially in the dikes themselves.  The two known ore bodies extend for 400-450 m.  The sandstone and shale intruded by the dikes is intensely deformed and contact metamorphosed; deformation probably related to the Burganda strike-slip fault.  Folds and dikes trend northwest.  Quartz veins contain albite, ankerite, chlorite and sericite.  Ore minerals are arsenopyrite, pyrite and more rarely, scheelite, galena, sphalerite, pyrrhotite, and gold, with rare cassiterite and molybdenite.  Gold is associated with galena and arsenopyrite.  Gold nuggets up to 2 g occur.	Russia

P55-13	Maldyak	P	55	13	62 55 56N	148 13 54E	62.9322222222222	148.231666666667	6256'N	14814'E	Au quartz vein   	Au		Small. Proven reserves of 800 kg Au.  Grade ranges from traces to hundreds of g/t Au.  	Yana-Kolyma	Aleinikov, written commun., 1945; Fedotov, 1960a	A set of gold-bearing dikes, and zones of veins and veinlets occur in sedimentary rocks near a straight section of the Burganda strike-slip fault.  The Lower Jurassic sandstone and shale host rock is deformed into small steep folds that trend northwest.  Thin, en echelon dikes occur in diagonal shears.  Transverse, extension fractures are filled with short and morphologically complex quartz veinlets and lenses up to 10 m thick.  Major dike is up to 5 km long and is composed of propylitized and albitized basalt and rhyolite.  It is cut and locally offset by an oblique set of shear fractures, which host lenticular quartz veins and reticulate albite-quartz veinlets with sulfides and rich gold ore bodies.  Ore bodies are composed of quartz, albite, ankerite, calcite, sericite, chlorite, apatite, pyrite, arsenopyrite, galena, sphalerite, chalcopyrite, tetrahedrite-tennantite, and gold.	Russia

P55-14	Dorozhnoe	P	55	14	62 50 13N	148 01 31E	62.8369444444444	148.025277777778	6250'N	14802'E	Au quartz vein   	Au		Small.  Ranges from 0.5 to 30,150 g/t Au.  	Yana-Kolyma	Firsov, 1959	Steeply dipping, subparallel, gold-bearing quartz veins occur for about 100-120 m in a granitic pluton which is exposed over an area about 9 km long and up to 1.5 km wide.  Stock (K-Ar age of 131-134 Ma) is composed of granodiorite, biotite granite, and granite porphyry.  Stock trends about east-west, across the strike of the Lower Jurassic sandstone-shale sequence it intrudes.  Veins trend northeast, are complicated in form, and vary in thickness from about 0.1-2 m.  Veins branch and wedge out on entering the hornfels around the granite.  Ore bodies are composed of quartz, sericite (muscovite), albite, calcite, ankerite, chlorite, apatite, arsenopyrite, pyrite, galena, sphalerite, chalcopyrite, electrum; and rare high-grade gold, tetrahedrite-tennantite, and scheelite.  Gold nuggets up to 800 g occur.  Gold characteristically occurs with mica and galena as linear bands parallel to vein contacts.	Russia

P55-15	Kyurbelykh	P	55	15	62 45 45N	145 29 23E	62.7625	145.489722222222	6246'N	14529'E	Sn silicate-sulfide vein and Sn polymetallic vein   	Sn	Ag	Small.  	Eastern Asia-Arctic: Verkhne-Kolyma	Chaikovsky, 1960; Lugov, 1986	Steeply dipping, tin-bearing veins, less common linear zones of veinlets, and metasomatically altered rocks, occur near the northeastern contact of the Early Cretaceous(?) Tass-Kystabyt granitic pluton that intrudes Upper Triassic sandstone and sandy shale.  Mineralized fissures generally strike east-west and north-west and are several hundreds of meters long and up to 1 m thick.  Ore bodies are accompanied by weak contact metamorphism, sericitization, chloritization and, more rarely, tourmalinization.  Veins are composed of quartz, tourmaline, cassiterite, arsenopyrite, pyrite, marcasite, pyrrhotite, chalcopyrite, and sphalerite, with minor galena, tetrahedrite-tennantite, argentite, stannite, bismuthinite, magnetite, hematite, ankerite, and calcite.  Amount of sulfides increases away from the contact of the granitic rocks.  Ore bodies are widely dispersed over the area, sometimes in clusters of 10-15 veins.	Russia

P55-16	Shturm	P	55	16	62 47 24N	149 45 59E	62.79	149.766388888889	6247'N	14946'E	Au quartz vein   	Au		Small to medium.   Averages about 10-12 g/t Au.  	Yana-Kolyma	Skornyakov, written commun., 1953	Deposit consists of sets of auriferous quartz veinlets hosted by a complicated, propylitized, albitized, silicified, and sulfidized basalt-rhyolite dike averaging 4.5 m thick and extending for over 5.5 km.  Gold-quartz stockworks, irregular masses, and reticulate ore bodies are best developed where the dike is crossed by shear fractures that parallel folds in the Lower and Upper Jurassic clastic sequence intruded by the dike.  Dike is broken into small blocks by shear zones.  Alteration and mineralization of dike are concentrated along the shear zones.  Ore minerals are quartz, albite, ankerite, sericite, paragonite, actinolite, chlorite, apatite, tourmaline, arsenopyrite, pyrite, pyrrhotite, boulangerite, gold, sphalerite, galena, chalcopyrite, scheelite, and rutile.  Gold is 900-940 fine and associated with arsenopyrite, sphalerite, and galena.  Gold nuggets up to 300 g have been found.  Deposit is located within the Srednekan-Shturm strike-slip fault zone.	Russia

P55-17	Daika Novaya	P	55	17	62 44 50N	148 05 56E	62.7472222222222	148.098888888889	6245'N	14806'E	Au quartz vein   	Au		Medium.  Typically ranges 0.2 to 21 g/t Au with up to 1385 g/t Au.  	Yana-Kolyma	Shakhtyrov, oral commun., 1991	Steeply dipping dike of diorite porphyry has been hydrothermally altered.  Dike is sulfidized and cut by an orthogonal system of subhorizontal and subvertical quartz veinlets that contain carbonates, feldspars, disseminated arsenopyrite, pyrite, sphalerite, and gold.  Dike trends northeast across a folded Jurassic sandstone-shale sequence.	Russia

P55-18	Svetloe, Kholodnoe	P	55	18	62 43 52N	147 51 47E	62.7311111111111	147.863055555556	6244'N	14752'E	Au quartz vein   	Au		Small. Proven reserves 3.6 t Au.  Grade ranges from 1.0 to 100 g/t Au.  	Yana-Kolyma	Skornyakov, written commun., 1953; Fedotov, 1960b, 1967	Subparallel quartz veins 600-1500 m long average 0.2-0.5 m thick, and 20-80 m apart.  Veins occur as conformable bodies or in acute fractures in the limbs of an asymmetric anticline.  Veins dip 70 to 85.  Ore bodies trend mainly northwest, but range from east-west to north-south.  Upper Triassic and Lower Jurassic sandstone and shale is intruded by a transverse set of dikes of felsic and intermediate composition that host the auriferous quartz veinlets.  Ore minerals are mainly arsenopyrite, pyrite, and galena containing gold (858 fine).  Subordinate ore minerals are:  sphalerite, chalcopyrite, scheelite, pyrrhotite, and native gold.  Kholodnoe deposit, which occurs to the south, is made up of three sets of quartz veins and mineralized fracture zones with a northwest trend.  Some veins occur within the dikes.  Gold is present as very small inclusions or irregular masses.	Russia

P55-19	Chai-Yurya	P	55	19	62 41 18N	147 24 25E	62.6883333333333	147.406944444444	6241'N	14724'E	Au quartz vein   	Au		Small.  Veins contain 0.4 to 425 g/t Au; mineralized zones average about 5 g/t Au.  	Yana-Kolyma	Skornyakov, written commun., 1953	Altered dikes of felsic to intermediate composition are cut by sets of gold-bearing quartz veins.  Lenticular quartz veins occur in silicified and mineralized zones in sedimentary rocks near the dikes.  Quartz veins contain albite, potassium feldspar, carbonates, and biotite.  Ore minerals are pyrite, arsenopyrite, galena, sphalerite, chalcopyrite, pyrrhotite, gold, bismuthinite, tetrahedrite, and boulangerite.  Deposit occurs in Middle and Upper Triassic sandstone and shale.  Ore bodies are controlled by diagonal fractures that acutely intersect the Chai-Yurya strike-slip fault zone.  Veins are numerous, but they are scattered over a large area and are not large.	Russia

P55-20	Chelbanya	P	55	20	62 36 41N	148 02 28E	62.6113888888889	148.041111111111	6237'N	14802'E	Au quartz vein   	Au		Small.  Veins contain 1 to 32 g/t Au.  	Yana-Kolyma	Skornyakov, written commun., 1953	Steep, transverse and oblique quartz veins and veinlets occur near and in dikes of propylitized rhyolite and andesite that intrude a Lower Jurassic sandstone-shale sequence.  Veins are mainly composed of quartz, albite, carbonates, and sericite; with minor arsenopyrite, pyrite, galena, gold, sphalerite, chalcopyrite, pyrrhotite, lellingite, scheelite, hematite, fluorite, ilmenite, rutile, sphene, apatite, tourmaline, cassiterite, and epidote.  Gold occurs as tiny disseminations and in particles up to 5-10 mm in size.  At least one vein 50 m long and 0.3 m thick, which cross cuts a dike, is economic.	Russia

P55-21	Verkhne-Khatynnakh	P	55	21	62 36 18N	149 45 22E	62.605	149.756111111111	6236'N	14945'E	Sn quartz vein   	Sn	Au, Ag	Small.  	Unassigned	Buryanov, written commun., 1940	Northeast-trending steeply-dipping quartz veins and veinlets form productive zones that range in thickness from 5 cm up to 0.5 m.  Mineralized area is made up of intensely contact metamorphosed Middle Jurassic shale and sandstone, but the intrusive body responsible for alteration of the host rocks is not exposed.  Ore bodies are accompanied by halos of tourmalinization, sericitization, carbonatization, and abundant disseminated arsenopyrite.  Gangue minerals include quartz, tourmaline, sericite, albite, apatite, fluorite, calcite, and chlorite.  Ore minerals are cassiterite, scheelite, arsenopyrite, pyrite, sphalerite, chalcopyrite, galena, gold, and sulfosalts of lead and silver.	Russia

P55-22	Burkhala	P	55	22	62 36 05N	149 03 53E	62.6013888888889	149.064722222222	6236'N	14904'E	Au quartz vein   	Au		Small. Proven reserves of 4.6 t Au.  Grade ranges from 0.1 to 5261 g/t Au.  	Yana-Kolyma	Skornyakov, written commun., 1953	Mineralized fracture belts and folded zones up to 5 m thick, contain quartz and quartz-carbonate veins and veinlets with arsenopyrite, pyrite, and gold; and minor galena, sphalerite, pyrrhotite, and scheelite.  Late veinlets contain cassiterite, topaz, and tremolite.  Mineralized area is up to 2 km long and several tens of meters wide.  Deposits are related to the Debin strike-slip fault zone.  Structure of the deposit consists of en echelon fractures that cut the intensely deformed and sulfidized Lower and Middle Jurassic sedimentary rocks.	Russia

P55-23	Tektonicheskoe	P	55	23	62 25 59N	145 14 43E	62.4330555555556	145.245277777778	6226'N	14515'E	Pb-Zn-Ag vein   	Pb, Zn, Ag, Sn		Small.  Contains 0.2 to 22.7% Pb, 0.2 to 8.9% Zn, 12 to 1276 g/t Ag, 0.05 to 0.3% Sn.  	Eastern Asia-Arctic: Verkhne-Kolyma	Fursikov, written commun., 1952	Quartz and ankerite-quartz veins of variable thickness are confined to steeply dipping fractured zones in Upper Triassic sedimentary rocks.  Main ore body trends northwest for 900 m, and is 0.4-5 m thick.  Ore minerals are mainly disseminated Ag minerals.  Veins contain galena, sphalerite, cassiterite, pyrite, arsenopyrite, pyrrhotite, chalcopyrite, jamesonite, tetrahedrite-tennantite, and argentite.	Russia

P55-24	Djelgala-Tyellakh	P	55	24	62 19 00N	148 50 00E	62.3166666666667	148.833333333333	6219'N	14850'E	Au quartz vein   	Au		Small.  Ranges from 1 to 100 g/t Au.  	Yana-Kolyma	Panychev, written commun., 1977	Late Jurassic silicified dikes along a set of parallel shear fractures are cut by a system of ladder and reticulate gold-bearing quartz veinlets.  Deposit extends for 1-1.5 km and consists of a set of saddle-veins in the cores of anticlines composed of fine-grained sandstone.  Dikes are from 100 m to 8 km long with a northwest to generally east-west trend.  Individual ore bodies extend for hundreds of meters.  Veins and veinlets contain albite, ankerite, tourmaline, disseminated pyrite, arsenopyrite, galena, scheelite, bismuth minerals, and gold.  Area is within the hornfels zone of the Bolshoy Annachag granitic body.	Russia

P55-25	Bulunga	P	55	25	62 18 02N	145 42 15E	62.3005555555556	145.704166666667	6218'N	14542'E	Pb-Zn-Ag vein or skarn  	Pb, Zn, Ag		Small.  Contains 2.3 to 8.9% Pb, 0.57 to 4% Zn, 30 to 780 g/t Ag.  	Eastern Asia-Arctic: Verkhne-Kolyma	Rutskov, written commun., 1942; Radchenko, written commun., 1950	Steeply dipping, single and branching veins up to 200 m long occur in contact-metamorphosed Middle Triassic sedimentary rocks that have been intruded by a small quartz diorite stock.  Ores are composed of galena, sphalerite, chalcopyrite, pyrite, arsenopyrite, tetrahedrite-tennantite, argentite, and gold.  Veins also contain anomalous tin, cadmium, indium, cobalt, and bismuth.  Gangue minerals include quartz, carbonate, fluorite, and chlorite.	Russia

P55-26	Tigrets-Industriya	P	55	26	62 16 09N	146 30 30E	62.2691666666667	146.508333333333	6216'N	14631'E	Sn polymetallic vein   	Sn, Ag, Pb, Zn		Small.  	Eastern Asia-Arctic: Verkhne-Kolyma	Lychagin, 1967; Plyashkevich, 1990	Quartz-carbonate-sulfide, quartz-sulfide, and sulfide-quartz veins, and lenticular bodies and zones of veinlets, occur in weakly metamorphosed Upper Permian sedimentary rocks that have been cut by a Late Cretaceous granite porphyry.  Ore bodies are 100-200 m long and 0.1-0.8 m thick, and are localized along northeast trending fractures.  Upper Cretaceous siliceous lava flows are peripheral to the mineralized area.  There are several tin and silver mineral associations in the deposit.  A period of deformation separated an early quartz-cassiterite and polysulfide stage of mineralization marked by cassiterite, arsenopyrite, pyrite, chalcopyrite, sphalerite, galena, canfieldite, Fe-freibergite, stannite, and pyrargyrite, from a later selenocanfieldite-quartz stage that produced quartz, pyrite, sphalerite, galena, stannite, selenocanfieldite, and manganocalcite.	Russia

P55-27	Tokichan	P	55	27	62 00 56N	146 45 14E	62.0155555555556	146.753888888889	6201'N	14645'E	Au quartz vein   	Au		Proven reserves of 296 kg Au. Probable mineral resource of 369 kg Au.  Up to 116 g/t Au; averages 11 g/t Au.  	Yana-Kolyma	Gabdrakhmanov, written commun., 1969; Zhitkov, Zhitkova, and Goryushin, 1991	Quartz veins and zones of veins and veinlets contain disseminated arsenopyrite, pyrite, galena, sphalerite, scheelite, and native gold.  Veins occur in Upper Permian clastic rocks near the Tenka strike-slip fault zone.  There are three zones of alteration:  (1) an outer carbonate-albite-chlorite zone,  (2) a medial sericite-chlorite-quartz zone, and  (3) an inner quartz-sericite zone.  Deposit occurs along a narrow northwest-trending band and is controlled by an intricate system of longitudinal and reverse faults and augen mylonite.	Russia

P55-28	Degdekan	P	55	28	61 57 54N	146 59 53E	61.965	146.998055555556	6158'N	14660'E	Au quartz vein   	Au		Small. Proven reserves of 5.6 t Au.  Average grade of 7.3 g/t Au.  Past production of 116 kg Au.  Active from 1946-47.	Yana-Kolyma	Skornyakov, written commun., 1953; Shlyapnikov, written commun., 1956	Banded and brecciated quartz, carbonate-quartz veins, and zones of quartz veinlets, contain disseminated arsenopyrite, sphalerite, pyrite, chalcopyrite, galena, and gold, with minor tetrahedrite-tennantite, boulangerite, and scheelite.  Veins overlap the contacts between propylitized dikes of intermediate and felsic composition and Upper Permian sandstone and shale.  Veins also occur in fractured belts and zones of sulfidization in the sedimentary rocks.  Dikes generally trend east-west and are conformable with the sedimentary sequence.  Deposit is associated with the Tenka strike-slip fault zone.  Dikes formed both at the same time and later than the ore bodies.  The majority of the ore bodies pre-date dike intrusion.  Veins in post-ore dikes of microdiorite and lamprophyre(?) show evidences of thermal metamorphism.  Mineralized zones include carbonaceous shale beds 100 to 1400 m in length.  Gold is 720-800 fine.	Russia

P55-29	Kharan	P	55	29	61 55 43N	146 02 49E	61.9286111111111	146.046944444444	6156'N	14603'E	Sn polymetallic vein   	Sn		Small.  High-grade ores.  	Eastern Asia-Arctic: Verkhne-Kolyma	Lugov, 1986	Zones of chlorite-sericite-quartz veinlets trend north, northwest and northeast.  Veinlets contain crystalline and colloform cassiterite, pyrrhotite, chalcopyrite, galena, sphalerite, marcasite, and arsenopyrite.  Tin is confined to country rock along the southern contact of the Early to Late Cretaceous Kharan granitoid pluton; which consists of diorite and quartz diorite intruded by granite porphyry.	Russia

P55-30	Khenikandja	P	55	30	61 48 46N	146 30 31E	61.8127777777778	146.508611111111	6149'N	14631'E	Sn silicate-sulfide and Sn polymetallic vein   	Sn		Small.  	Eastern Asia-Arctic: Verkhne-Kolyma	Lugov, Makeev, and Potapova, 1972; Flerov, 1974	Steeply dipping, metasomatic veins, irregular veins and veinlets, and mineralized fracture belts, are associated with metasomatic zones and considerable feldspar.  Ore bodies are 1-3 m thick and trend northwest.  Tin ores are dominated by albite and cassiterite, with locally abundant adularia, anorthoclase, chlorite, quartz, calcite, tourmaline, and biotite.  Metallic minerals, which were mostly deposited after the cassiterite, include galena, sphalerite, pyrite, chalcopyrite, arsenopyrite, magnetite, wolframite, stannite, bismuth, bismuthinite, and bismuth and gold tellurides.  Ore bodies are hosted in Upper Cretaceous biotite porphyry, leucocratic granite, and alaskite porphyry.	Russia

P55-31	Vetrenskoe	P	55	31	61 44 40N	149 33 29E	61.7444444444444	149.558055555556	6145'N	14933'E	Au quartz vein   	Au	W	Small. Average grade ranges from 17 to 22 g/t Au.  Proven reserves of 13.3 tonnes gold.  Well explored with encouraging potential.  Partly mined.  	Yana-Kolyma	Kalinin, 1974, 1975b; Kalinin and Panychev, 1974; Novozhilov and Sher, 1974	Quartz, planar and saddle veins, lenses, and reticulate and ptygmatic veinlets, occur in the central portion of a major strike-slip fault, in its secondary fractures, and in hinges of anticlines and synclines near the northwest trending Chai-Urya fault zone.  Host rocks consist of Upper Triassic and Lower Jurassic shale with rare siltstone and sandstone.  Some interbeds are characterized by a high content of carbon, iron, and titanium.  Ore bodies are identified by sampling within the vein zones.  Portions of the veins subjected to plastic deformation carry the highest gold content.  Veins consist of 85 to 99% quartz, with varying amounts of iron-magnesium carbonate.  Ore minerals are primarily arsenopyrite and pyrite; scheelite is also important.  Minor minerals include sericite, chlorite, albite, oligoclase, galena, sphalerite, marcasite, pyrrhotite, wolframite, tetradymite, graphite, apatite, and titanium oxides.  Native gold (880-890 fine) is present in quartz, and also as intergrowths with arsenopyrite and galena.  Small amounts of gold occur in wall rock impregnated with sulfides.	Russia

P55-32	Natalka	P	55	32	61 39 22N	147 41 04E	61.6561111111111	147.684444444444	6139'N	14741'E	Au quartz vein   	Au		Medium.  Total reserves of 450 t Au.  Encouraging potential.  Low-grade ores average 4 g/t.  Mined since 1945.  Produced 75 tonnes  Au and 22 tonnes Ag. Annual production of 1.5 t Au and 4 t Ag.   	Yana-Kolyma	Firsov, 1957a; Shilo, 1960; Voroshin and others, 1989; Goncharov, 1995.	Zones of subparallel and reticulate quartz veinlets can be grouped into two or three systems.  They converge locally along strike into podiform and platy veins.  Ore minerals cement schistose, brecciated, cataclastic, and graphitized Upper Permian tuffaceous sedimentary rocks.  Deposit is associated with the Tenka strike-slip fault.  In plan, the ore field has an S-shaped, en echelon fault structure 7 km long, trending northwest, and bifurcates to the south.  Deposit forms a steeply dipping "propeller" pattern.  Deformed ore-bearing sequence is complicated by synclines and anticlines near the fault zone and abundant pre-ore and post-ore dikes of felsic to intermediate composition.  Overall zone of mineralized veinlets is approximately 300 m wide, consists of zones 50-300 m long and 1-15 m thick which comprise economic ore bodies.  These bodies converge in a fan-like fashion.  Gangue in the veinlets are mainly composed of quartz (90-95%), albite, anorthoclase, carbonate, chlorite, and sericite; with lesser kaolinite, barite, apatite, and graphite.  Ore minerals are dominated by fine-grained disseminated arsenopyrite intergrown with pyrite in wall rocks.  Subordinate or rare minerals include galena, sphalerite, chalcopyrite, pyrrhotite, lellingite (FeAs2), cobaltite, bournonite, boulangerite, tetrahedrite-tennantite, scheelite, cassiterite, rutile, ilmenite, and stibnite.  Fine-grained and microscopic, low-grade gold (about 750 fine) is commonly associated with arsenopyrite and galena in the veins and veinlets.  A considerable proportion of the gold is intergrown in arsenopyrite in the wall rock adjacent to the veins.	Russia

P55-33	Porozhistoe	P	55	33	61 36 12N	146 27 54E	61.6033333333333	146.465	6136'N	14628'E	Sn polymetallic vein   	Sn		Small.  0.49-1.31 % Sn; up to 112 g/t Ag.	Eastern Asia-Arctic: Verkhne-Kolyma	Lugov, 1986	Steeply-dipping mineralized fracture zones and quartz veins in Lower Triassic clastic sedimentary rocks contain cassiterite, pyrite, arsenopyrite, and galena.	Russia

P55-34	Pavlik	P	55	34	61 32 08N	147 56 44E	61.5355555555556	147.945555555556	6132'N	14757'E	Au quartz vein   	Au		Medium Proven reserves of 57.6 t Au.  Low-grade ore.	Yana-Kolyma	Eremenko, written commun., 1956	Lenticular zones of reticulate quartz veinlets and mineralized zones up to 2 km long and 3-15 m thick occur in Upper Permian sandstone, shale, and tuff.  Ore field is an S-shaped, en echelon fault structure associated with the Tenka strike-slip fault zone.  Few dikes are present.  Veins and veinlets are composed mainly of quartz, with albite, ankerite, sericite, and chlorite.  Ore minerals are arsenopyrite, pyrite, sphalerite, galena, chalcopyrite, pyrrhotite, and gold (790-805 fine).  Gold is commonly associated with arsenopyrite.	Russia

P55-35	Shkolnoe	P	55	35	61 27 32N	148 48 09E	61.4588888888889	148.8025	6128'N	14848'E	Granitoid-related Au	Au	Bi, Te, Ag	Medium Total reserves 32 tonnes Au.  Averages 29 g/t Au and 45 g/t Ag.  Has produced 17 t Au and 17 t Ag since start of mining in 1991.  Annual production of 3 t Au and 3 t Ag.  	Eastern Asia-Arctic: Verkhne-Kolyma	Orlov and Epifanova, 1988; Voroshin and others, written commun., 1990; Palymsky and Palymskaya, 1990; Banin, 1993, written commun;  Goncharov, 1995.	An en echelon system of quartz veins trending generally east-west.  Veins occur in a multiphase granitoid stock about 4 km2 in size composed mainly of granodiorite and adamellite; that is intruded by dikes of granite-porphyry, rhyolite, pegmatite, aplite, and lamprophyre.  Quartz veins are surrounded by zones of beresitic and argillic alteration; skarn- and greisen-like alteration is present locally.  Mineralization occurred in two stages separated by intrusion of lamprophyre dikes:  (1) gold-polymetallic stage marked by molybdenite, arsenopyrite, lellingite, native bismuth, bismuth tellurides, and native gold;  (2) the most economically important stage, marked by arsenopyrite, pyrite, polymetallic sulfides, gold, electrum, freibergite, tetrahedrite, lead-antimony and silver sulfosalts, argentite, and stibnite.  Gold ore bodies extend to great depth, into a large zone of complicated mineralogy, geochemistry, and structure.	Russia

P55-36	Tankist	P	55	36	61 21 04N	147 56 13E	61.3511111111111	147.936944444444	6121'N	14756'E	Porphyry Mo   	Mo		Small to medium.  	Eastern Asia-Arctic: Verkhne-Kolyma	Bubnov, written commun.,1949; Tyukova, 1989	Sets of reticulate and subparallel, molybdenite-quartz, molybdenite-feldspar-quartz, and quartz-molybdenite-arsenopyrite veinlets and veins, several millimeters to 30 cm thick, occur in a hypabyssal granite porphyry intrusion and contact-metamorphosed Upper Permian sedimentary rocks.  Deposit occurs near the northern contact of the Early Cretaceous Sevastopol granitic body.  Disseminated molybdenite also occurs with quartz as magmatic segregations within the pluton.  Associated minerals are sericite, chlorite, carbonates, epidote, fluorite, magnetite, hematite, pyrite, chalcopyrite, pyrrhotite, lellingite, sphalerite, galena, and cassiterite.	Russia

P55-37	Igumen	P	55	37	61 25 07N	148 20 42E	61.4186111111111	148.345	6125'N	14821'E	Au quartz vein   	Au		Small.  Proven reserves of 5.8 t Au.  Produced about 11.5 tonnes Au.  Grade ranging 1 to 50 g/t Au, and up to several kg/t Ag.  Almost completely mined out.  	Yana-Kolyma	Firsov, 1958; Bolotova, Nikolaeva and Filippov, 1982; Tyukova, 1989.	Steeply-dipping extensive and persistent quartz veins occur in Upper Permian sandstone, shale, and tuff along the Tenka strike-slip fault zone.  Veins form a northwest-trending zone about 4 km long and 2.5 km wide, oblique to an anticline axis.  Main ore bodies occur in quartz-cordierite-biotite hornfels in the gently-dipping roof of an Early Cretaceous granitic pluton.  Southeastern flank of the mineralized zone is truncated by this intrusive.  Both the hornfels and quartz veins contain local, post-ore skarn.  Gold-bearing quartz veins are dominated by quartz, albite, iron-bearing carbonate, arsenopyrite, pyrrhotite, chalcopyrite, galena, sphalerite, and gold (765-896 fine).  Near the intrusion, vein quartz was recrystallized and the native gold becomes coarser and more abundant.  Some late-stage bodies have silver values.	Russia

P55-38	Butugychag	P	55	38	61 15 18N	149 04 31E	61.255	149.075277777778	6115'N	14905'E	Sn quartz vein   	Sn	U	Medium.  Averages about 2.5% Sn.  Almost completely mined out.  	Yana-Kolyma	Chaikovsky, 1960; Lugov, Makeev, and Potapova, 1972	Feldspar-quartz veinlets and veins up to 1.5 m thick, and linear stockwork zones 0.2-5 m or more thick and several hundreds meters long, contain abundant cassiterite.  Ore bodies trend northeast and occur in the western dome of Butugychag pluton; a Late Jurassic or Early Cretaceous(?) leucocratic porphyritic granite.  Economic tin veins extend for no more than 40-85 m into the hornfels over the granite dome.  Dominant minerals are quartz, albite, potassium feldspar, muscovite, cassiterite, fluorite, and ankerite.  Topaz, biotite, tourmaline, arsenopyrite, pyrite, and calcite are less common.  Sericite, chlorite, sphalerite, galena, wolframite, and molybdenite occur as minor intergrowths with other minerals.  Carbonates and sulfides increase with depth.	Russia

P55-39	Rodionov	P	55	39	61 16 02N	148 37 15E	61.2672222222222	148.620833333333	6116'N	14837'E	Au quartz vein   	Au		Small.  Proven reserves of 1.5 t Au.  Produced about 4 tonnes Au during 1947-54.  Grab samples with1 to 2000 g/t Au.  	Yana-Kolyma	Firsov, 1957b; Tyukova, 1989	A major gold-bearing quartz vein located on an overthrust structure, which deforms the limb of an anticline composed of Permian tuff and sedimentary rock.  Thrust and fold structures are similar in strike.  Upper portion of the vein dips gently, but it is steep at depth.  Gently-dipping portion has numerous small, steeply dipping veinlets radiating from the hanging wall, which form a "tail" with a vertical extent of 5-8 m.  Vein about 550 m along strike and varies from 5 cm to 9 m thick.  Hanging wall composed of banded quartz with carbonaceous shale interbeds.  Foot wall composed of sedimentary rock breccia cemented by massive quartz.  Gangue minerals are feldspars, ankerite, sericite, paragonite, chlorite, and apatite.  Ore minerals are pyrite, arsenopyrite, pyrrhotite, galena, sphalerite, chalcopyrite, scheelite, and native gold.  Electrum, tetrahedrite-tennantite, and silver sulfosalts are also present.  Weak contact metamorphism occurs with formation of diopside, hedenbergite, and actinolite.  Deposit is located near the Tenka strike-slip fault zone.	Russia

P55-40	Bogatyr	P	55	40	61 02 00N	145 55 00E	61.0333333333333	145.916666666667	6102'N	14555'E	Sn silicate-sulfide vein   	Sn		Small.  0.06-56% Sn.  	Eastern Asia-Arctic: Verkhne-Kolyma	Lugov, 1986	Cassiterite-bearing veins and mineralized zones of quartz-chlorite-sulfide composition in Upper Permian marine clastic rocks occur at the contact with a Late Cretaceous granite intrusion.	Russia

P55-41	Khuren	P	55	41	60 54 00N	147 10 00E	60.9	147.166666666667	6054'N	14710'E	Sn polymetallic vein   	Sn		Small.  0.03-1.2% Sn.  	Eastern Asia-Arctic: Verkhne-Kolyma	Zakandyrin, written commun., 1952	Feldspar-quartz, chlorite-quartz, and sulfide veins occur in mineralized fracture zone in contact-metamorphosed Upper Permian shale, siltstone and sandstone.  Sulfides also cement the matrix of the fractured zone.  Ore occurs in massive and disseminated form, and less commonly in brecciated or banded form.  Main ore minerals are   arsenopyrite and pyrite; subordinate minerals are quartz, chlorite, cassiterite, sphalerite, galena, stannite, native bismuth, and cobaltite.  Ore zones strike northwest and northeast for 70 m to 900 m, with the average thickness 0.7-2.8 m.  Host rocks are intruded by a small stock of greisenized granodiorite, and numerous dikes of felsic and intermediate composition.	Russia

P55-42	Senon, Utro, Serebryanoe	P	55	42	60 40 00N	148 05 00E	60.6666666666667	148.083333333333	6040'N	14805'E	Epithermal vein and volcanic-hosted Sb vein	Ag, Au, Sb		Small.  Ranges 0.2 to 10.6 g/t Au and 20 to 900 g/t Ag.  Utro deposit contains 6.7 to 58% Sb.  	Eastern Asia-Arctic: Okhotsk	Markova, written commun., 1978; Zhuravlev and Garifulin, written commun., 1979; Manafov and others, written commun., 1979	Senon deposit consists of sets of subparallel, quartz and feldspar-carbonate-quartz veins with disseminated pyrite, arsenopyrite, argentite, pyrargyrite, stephanite, chalcopyrite, sphalerite, galena, hessite, bismuthinite, and marcasite along a generally east-west zone of propylitization in Upper Cretaceous andesite.  Utro deposit consists of disseminated veinlets of stibnite accompanied by pyrite, marcasite, arsenopyrite, and, less common miargyrite, berthierite, dyscrasite, plagionite, sphalerite, cinnabar, native silver, and antimony; in silicified and sericitized ignimbrite.  Serebryanoe deposit consists of kaolinite-sericite-quartz altered rock in a hypabyssal dacite body.  Altered zone contains east-west trending veins and reticulate systems of veinlets with irregularly disseminated pyrargyrite, miargyrite, polybasite, tetrahedrite-tennantite, arsenopyrite, pyrite, sphalerite, argentite, native silver, and gold.	Russia

P55-43	Burgagylkan	P	55	43	60 38 00N	146 45 00E	60.6333333333333	146.75	6038'N	14645'E	Au-Ag epithermal vein	Au, Ag	Bi	Small to medium.  Averages about 7.4 g/t Au, 800 g/t Ag, and up to 1% Bi.  	Eastern Asia-Arctic: Okhotsk	Pavlov, written commun., 1977	Quartz, adularia-quartz, and sulfide-quartz veins and stockwork zones contain disseminated pyrite, sphalerite, galena, chalcopyrite, tetradymite, tetrahedrite, sulfosalts of silver, electrum, tellurides of gold and silver, and stibnite.  Gold-silver ore bodies are confined to Upper Cretaceous propylitized andesite and agglomerate of the hypabyssal and vent facies in the margin of a caldera structure.  Veins are several hundreds of meters to 2 km long and up to 15 m wide.  Massive, brecciated, colloform-banded, framework-platy, and cockade ore structures are typical.  Au:Ag ratio ranges from 1:30 to 1:130.	Russia

P55-44	Sentyabr	P	55	44	60 43 46N	149 22 17E	60.7294444444444	149.371388888889	6044'N	14922'E	Au-Ag epithermal vein	Ag, Au	Co, Bi, Te	Medium.  Ranges from 2 to 6273 g/t Ag and 1.4 to 787 g/t Au.  	Eastern Asia-Arctic: Okhotsk	Umitbaev, 1986	Quartz stockworks, hydrothermal breccias, and veins; with precious metals, and polymetallic and silver minerals, occur around the periphery of an intrusive dome.  Host rocks are Lower Triassic siltstone and shale.  Intrusive core of the dome is a Late Cretaceous multiphase stock of gabbro, granite porphyry, and porphyritic granite.  Ore bodies are controlled by arcuate faults and the granite porphyry dikes which radiate from the stock.  Polymetallic stage of mineralization includes quartz, fluorite, arsenopyrite, lellingite (FeAs2), glaucodot [(Co,Fe)AsS], chalcopyrite, pyrrhotite, pyrite, sphalerite, galena, joseite B, and nagyagite (with low Au and Ag); all of which typically occur in hornfels near the stock.  Silver stage of mineralization, characterized by argentite, stromeyerite, tetrahedrite, aguilarite, stephanite, polybasite, pyrargyrite, electrum, and kstelite, is typical of ore zones in low-grade metamorphic rocks further away from the stock.  Both types of mineralization occur together in an intermediate zone.	Russia

P55-45	Oira	P	55	45	60 08 53N	149 44 42E	60.1480555555556	149.745	6009'N	14945'E	Au-Ag epithermal vein	Au, Ag		Small.  Averages about 37 g/t Au and 51 g/t Ag. Produced 300 kg Au.	Eastern Asia-Arctic: Okhotsk	Skibina, written commun., 1977, Naiborodin, 1980; P.Layer, V.Ivanov, and T.Bundtzen, written commun., 1994.	Sets of adularia-chlorite-quartz veins with disseminated pyrite, argentite, pyrargyrite, miargyrite, electrum, and nagyagite occur in three ore zones up to several hundred meters long and 0.2 to 12 m wide.  Zone of ore bodies trends about east-west for 3 to 4 km, and is 1 to 2 km wide.  Ore is confined to the margin of a small volcanotectonic structure resulting from a subsidence of the volcanic roof over an Upper Cretaceous granite-granodiorite pluton.  Upper Cretaceous andesite and dacite that host the deposit are intensely propylitized to epidote-prehnite-chlorite and chlorite-carbonate facies.  Au/Ag ratio is 1:1.  Main stage of mineralization was followed by high-temperature contact-metasomatism related to the emplacement of the granitic complex.  Metasomatic stage is marked by a garnet-prehnite-wollastonite-epidote assemblage containing galena, sphalerite, and chalcopyrite.  Age of adularia in the Au-Ag veins is 76.0 Ma (Ar-Ar).  	Russia

P56-01	Opyt	P	56	01	63 54 15N	152 33 00E	63.9041666666667	152.55	6354'N	15233'E	Cu-Ag quartz vein? 	Cu, Au, Pb, Zn, Ag, Au		Probable mineral resource of 14 million tonnes grading 1.5% Cu, 1.2% Pb, 0.5% Zn, 180 g/t Ag, and up to 1 g/t Au.  	Shamanikha	Lyaski, written commun., 1937; Erzin, written commun., 1946; Ruchkin and Tsykarev, written commun., 1984	Occurs as veins and zones of massive, disseminated, and brecciated veinlets.  Gangue composed of quartz, calcite, dolomite, graphite, and chlorite.  Ore minerals include pyrite, chalcopyrite, bornite, galena, sphalerite, cuprite, native copper, chalcocite, arsenopyrite, and electrum.  Wall rock is copper-bearing, graphitic, sericite-chlorite-quartz schist of Upper Proterozoic age.  Silver-bearing copper-polymetallic veins also occur in Upper Jurassic siltstone and sandstone.  Deposit is located at the intersection of a Late Jurassic depression and a block of old metamorphic rocks near a barely eroded granite body.  Tin content of ore increases toward the granite.  Main ore body is about 2 km long; entire deposit extends northwesterly for about 3 km.	Russia

P56-02	Datsytovoe	P	56	02	63 28 57N	151 00 43E	63.4825	151.011944444444	6329'N	15101'E	Porphyry Cu   	Cu, Ag, Bi		Small.  	Yasachnaya River	V.I. Shpikerman and Savva, written commun., 1988.	Consists of a stockwork of disseminated quartz-carbonate-sulfide veinlets with silver-copper-bismuth minerals that occur in a subvolcanic trachyrhyolite in the middle of a circular volcanic structure.  Stockwork extends over an area of about 0.2 km2.  Pyrite is the dominate ore mineral; chalcopyrite, sphalerite, marcasite, galena, silver-lead-bismuth sulfosalts, acanthite, polybasite, and native bismuth are also present.  Trachyrhyolite, which hosts the ore bodies, is silicified and sericitized.  Skarn is present locally, possibly as xenoliths.	Russia

P56-03	Egorlyk	P	56	03	63 26 49N	154 55 18E	63.4469444444444	154.921666666667	6327'N	15455'E	Sn silicate-sulfide vein   	Sn		Small to medium.  Partly mined out.  	Eastern Asia-Arctic: Omsukchan	Matveenko, 1957; Erilov, 1970	Approximately 200 veins form 17 ore fields with varying economic potential that occur over an area of about 60 km2.  Veins hosted in porphyritic biotite granite and hybrid granodiorite of the Upper Cretaceous Egorlyk pluton.  Tin minerals are confined to steeply dipping fractures that trend northwest.  Veins are up to several hundreds meters long and average about 1.5 m thick.  Ore is composed predominantly of quartz and tourmaline, with cassiterite and muscovite.  Cassiterite occurs in masses up to 10 cm in diameter.  Variable quantities of pyrite, apatite, rutile, sphene, fluorite, calcite, arsenopyrite, magnetite, hematite, wolframite, scheelite, molybdenite, pyrrhotite, chalcopyrite, galena, sphalerite, native bismuth, and marcasite are present.  Wall rocks are tourmalinized and kaolinized, and less commonly chloritized and greisenized.  Total vertical extent of the ore bodies is at least 400-500 m; the highest tin content is at the tops and bottoms of this interval.	Russia

P56-04	Kunarev	P	56	04	63 24 06N	150 55 22E	63.4016666666667	150.922777777778	6324'N	15055'E	Pb-Zn-Cu-Ag skarn   	Pb, Zn, Cu, Ag		Probable mineral resource of 50 million tonnes with average grade of about 0.6% Pb, 3.8% Zn, 70 g/t Ag.  	Yasachnaya River	Shpikerman, 1987; Shpikerman and Savva, written commun., 1988	Consists of numerous lead-zinc occurrences of varying morphology.  Largest skarn occurrence is in a Middle Jurassic calcareous conglomerate overlain by  Middle and Upper Jurassic argillite and siltstone.  Skarn is composed of hedenbergite, garnet (grossular-andradite), epidote, chlorite, quartz, calcite, galena, sphalerite, chalcopyrite, galenobismutite, matildite, stannite, bornite, cobaltite, hematite, and tetrahedrite.  Disseminated metasomatic veinlet and brecciated silver ores occur in Devonian carbonate rocks in the outer part of the ore district.  These ores are mainly composed of quartz, calcite, pyrite, galena, boulangerite, freibergite, owyheeite, sphalerite, pyrargyrite, acanthite, sulfoantimonides of lead, betekhtinite [Cu10(Fe,Pb)S6], and native silver.  Disseminated silver-copper porphyry-type mineralization occurs in rhyolite and diorite in the middle of the volcanic structure.  This zoning is typical of porphyry copper deposits, but mineralization at Kunarev is dominated by skarn-polymetallic ore bodies.	Russia

P56-05	Cherninskoe	P	56	05	63 20 27N	151 04 30E	63.3408333333333	151.075	6320'N	15105'E	Fe (Cu, Pb, Zn) skarn   	Fe	Cu, Pb, Zn	Estimated resources 1 million tonnes with grade about 50% Fe and 10 million tonnes with grade about 0.5% Pb and 5% Zn.  	Yasachnaya River	Ruchkin and others, written commun., 1984	Metasomatic skarn-magnetite bodies 1 to 15 m thick occur in Upper Permian limestone and siltstone along the northern contact of the Late Jurassic Bolshoy Kanyon granite body.  Ores are composed of hedenbergite, ilvaite, epidote, garnet, axinite, magnetite, pyrrhotite, and chalcopyrite.  Small inclusions of cobaltite and glaucodot are also present.  Magnetite skarn is locally overprinted by sulfide minerals such as pyrrhotite, galena, and sphalerite.	Russia

P56-06	Bolshoy Kanyon	P	56	06	63 14 42N	151 04 38E	63.245	151.077222222222	6315'N	15105'E	Sn skarn   	Sn		Proven reserves 6300 tonnes Sn.  Average grade 0.35% Sn.  	Darpir	Politov, 1983	Numerous skarn bodies occur at contacts of Permian limestone and aluminous clastic sedimentary rocks with the Late Jurassic Bolshoy Kanyon granite.  Tin minerals are associated with the ultrafelsic, subalkalic granite phase of the pluton.  Skarns are dominated by a pyroxene-vesuvianite-garnet association; axinite skarns are also present.  Skarns are overprinted by ore stage mineralization characterized by quartz, calcite, fluorite, tourmaline, micas, sulfides, and cassiterite.  Sheets and podiform ore bodies predominate.  Skarn and related mineralization may be as much as 30 m thick near the apex of the granite's roof.  Saddle-like occurrences of skarn up to 70 m thick are developed over low points in the roof of the granite.	Russia

P56-07	Lazo	P	56	07	63 12 00N	152 13 27E	63.2	152.224166666667	6312'N	15213'E	Sn silicate-sulfide vein   	Sn		Active in 1940s but now mined out.  Past production 13,500 tonnes Sn from ore with grade of 1.15% Sn.  	Darpir	Vasetsky, 1966; Politov, 1986	Numerous veins 0.4-0.6 m thick occur in contact metamorphosed Middle Jurassic clastic sedimentary rocks that occur at the western contact of the Deryas-Yuryagin granite body.  Ore bodies are related to northeast-trending fractures.  Veins extend for several hundred meters along strike.  Rich ores are banded or irregular in form, often with an oblique or vertical pitch.  Veins are dominated by a quartz-tourmaline-pyrrhotite-calcite assemblage.  Cassiterite, chlorite, pyrite, arsenopyrite, sphalerite are subordinate.  Amount of scheelite increases toward the intrusion.  Three major mineral associations are distinguished that correspond to three successive stages of mineralization.  First stage is marked by tourmaline, quartz and cassiterite.  Second stage is characterized by sulfides of iron, zinc, tin, and other minerals.  Third stage is dominated by calcite.  Sulfides contain gold and silver.	Russia

P56-08	Verkhne-Seimchan	P	56	08	63 16 36N	151 23 04E	63.2766666666667	151.384444444444	6317'N	15123'E	Co-As vein   	Co, Bi		744.4 tonnes Co produced from 1950 to 1956.  Average grade 0.12% Co, 0.036% Bi, 0.001% Se, up to 1 g/t Au, and up to 480 g/t Ag.  	Darpir	Ruchkin and others, written commun., 1984	A set of veins composed mainly of quartz, iron chlorite, and tourmaline in contact metamorphosed Middle Jurassic siltstone south of the Late Jurassic Bolshoy Kanyon granite pluton.  Sparse calcite, fluorite, and adularia occur in the veins.  Main ore minerals are arsenopyrite, pyrite, cobaltite, and bismuthinite.  Subordinate ore minerals are:  pyrrhotite, chalcopyrite, galena, native bismuth, skutterudite, chloanthite, smaltite, selenides and tellurides of silver, lead, and bismuth; and native gold.  Veins are steeply-dipping, 250-1500 m long, 0.1-6 m thick, and are altered to a depth of 350 m.  Co content decreases at depth, and the quartz-chlorite gangue is replaced by quartz and tourmaline.  Ore bodies occur along a northwest-trending fault and are confined to splays of fault.	Russia

P56-09	Bastion	P	56	09	63 16 30N	153 12 47E	63.275	153.213055555556	6317'N	15313'E	Sn greisen   	Sn		Small.  High grade portion mined out.  Average grade 2.2% Sn.  	Darpir	Aksenova, written commun., 1957; Avdeev and Sadovsky, written commun., 1970	Lenticular and vein-like bodies of tin-bearing, quartz-tourmaline and quartz-muscovite greisens are several tens of centimeters to 5 m thick and 100-200 m long.  Bodies occur in northeast-trending fractures in Late Cretaceous porphyritic granite and granite porphyry.	Russia

P56-10	Arylakh	P	56	10	63 08 08N	154 58 04E	63.1355555555556	154.967777777778	6308'N	15458'E	Au-Ag epithermal vein	Ag, Au	Sn, Co, Bi	Medium.  Grade up to 556 g/t Ag and 1 g/t Au. Reserves of 3.2 tonnes Au, 9,100 tonnes Ag.  	Eastern Asia-Arctic: Omsukchan	Grigoriev, 1978	Quartz, adularia-quartz, and quartz-sulfide veins, from several hundreds of meters to 1 km long, grade into zones of veinlets.  They contain disseminated pyrite, arsenopyrite, galena, sphalerite, chalcopyrite, argentite, pyrargyrite, freibergite, and native silver.  Gold-silver minerals are locally associated with tin and cobalt-bismuth minerals.  Ore bodies occur in Upper Cretaceous rhyolite and ignimbrite, in a band of subvolcanic rocks about 5-6 km wide that rims a caldera.	Russia

P56-11	Chepak	P	56	11	63 04 40N	152 44 52E	63.0777777777778	152.747777777778	6305'N	15245'E	Granitoid-related Au   	Au, W, Bi		Medium.  Ranges 5 to 50 g/t Au, with values as high as 200 g/t Au.  Proven reserves 30 tonnes Au averaging 7-8 g/t.  	Darpir	Skornyakov, written commun., 1951.	Consists of steeply dipping, quartz-sulfide veinlets, veins, and associated alteration zones that cut intensely contact-metamorphosed Upper Triassic sandstone and shale overlying a buried granitic pluton.  Gold ore bodies are grouped into zones of northeast-trending veins.  Host rocks are intruded by dikes of diorite porphyry, lamprophyre, and dolerite; and by small intrusive bodies of Late Jurassic-Early Cretaceous granite porphyry, granodiorite porphyry, dacite, and quartz syenite.  Disseminated veinlets are also present in the magmatic rocks and in hornfels.  Wall rocks are silicified, chloritized, and sericitized.  Veins are composed mainly of quartz (30-40%), sericite, feldspars, chlorite, carbonate, apatite, arsenopyrite, lellingite, scheelite, pyrrhotite, and pyrite.  Less common or rare minerals include chalcopyrite, sphalerite, galena, bismuth, bismuthinite, marcasite, wolframite, tetrahedrite-tennantite, magnetite, ilmenite, rutile, sphene, tourmaline, epidote, and fluorite.  Arsenopyrite and lellingite comprise up to 20-40% of the veins.  Most gold is finely dispersed in arsenopyrite, lellingite, and pyrrhotite.	Russia

P56-12	Lyglykhtakh	P	56	12	62 59 24N	151 19 52E	62.99	151.331111111111	6259'N	15120'E	Sedimentary Mn   	Mn		Small.  Up to 65% MnO.  	Urultun and Sudar Rivers	Merzlyakov and Shpikerman, 1985	Manganese minerals occur in the lower part of an Upper Permian clastic-carbonate sequence 400-750 m thick, which is generally characterized by a high geochemical background for Mn, Ba, Zn, Cu, and Ag.  Ore-bearing member is up to 150-200 m thick and composed of variegated crimson, green, and black shale and siliceous shale intercalating with siltstone, tuffaceous sandstone, and organic limestone.  Ore bodies are commonly podiform and conformable to bedding.  Individual lenses are 0.02 to 1.5 m thick and 0.3 to 6.9 m long.  Several ore horizons are present.  Ore is generally stratified; but concretionary, oolitic, and spherulitic textures are sometimes present.  About two-thirds of the manganese is in rhodochrosite; but pyrolusite, rhodonite, ankerite, and barite are also present.  Manganese-bearing units have been metamorphosed near Late Mesozoic granitic intrusions; as a result piedmontite, apatite, and quartz occur there.  Pyrolusite, psilomelane, vernadite, and limonite are present in the oxidation zone.  Manganese oxide content of primary ore reaches 65%; and supergene ore reaches 57%.	Russia

P56-13	Tidit	P	56	13	62 51 12N	155 10 50E	62.8533333333333	155.180555555556	6251'N	15511'E	Ag-Pb-Zn vein, Polymetallic vein(?)	Ag, Pb, Zn		Small.  Average about 3.4% Pb, 7.6% Zn, and up to 650 g/t Ag.  Has been mined.  Low-grade reserves remain.  	Eastern Asia-Arctic: Omsukchan	Kopytin, written commun., 1987	Altered veins, lenses, and zones of veinlets of quartz-sulfide, chlorite-sericite-quartz, and quartz-rhodochrosite composition, locally highly altered, contain silver-bearing galena, sphalerite, chalcopyrite, pyrite, marcasite, arsenopyrite, pyrargyrite (Ag3SbS3), stephanite, freibergite, argentite, polybasite, proustite, famatinite, owyheeite, diaphorite, gudmundite, stannite, cassiterite, native silver, and adularia.  Ore bodies are richest along the tectonic contact between a Lower Cretaceous sedimentary sequence and Upper Cretaceous ignimbrites.  Mineralized fissures generally strike northeast and dip gently.  Mineralized area extends for 1-3.5 km and is 10-20 m wide.	Russia

P56-14	Novy Djagyn	P	56	14	62 47 46N	155 25 22E	62.7961111111111	155.422777777778	6248'N	15525'E	Porphyry Sn  	Sn		Small.  High grade portion mined out.  Average grade 0.8% Sn.  	Eastern Asia-Arctic: Omsukchan	Bocharnikov, written commun., 1968; Flerov, 1976	A metasomatized zone up to 130 m wide, marked by a quartz-chlorite-tourmaline alteration, extends for 5 km.  It includes sheets, pipe-like bodies, and veined occurrences composed mainly of cassiterite, magnetite, pyrite, hematite, chalcopyrite, arsenopyrite, muscovite, biotite, actinolite, garnet, topaz, dumortierite, and apatite.  Native gold, bismuth, stannite, tetradymite, pyrrhotite, pyrophyllite, kaolinite, rutile, and orthite are minor or rare.  The tourmaline-cassiterite-chlorite-quartz association is the most productive.  Deposit overlies buried granitic intrusion.  Lower Cretaceous conglomerate-shale-sandstone sequence that hosts the deposits is intruded by dikes of Late Cretaceous to Paleogene quartz diorite and granodiorite porphyry.  Sequence is overlain by Upper Cretaceous volcanic rocks near the deposits.  Host rocks are preferentially metasomatized along strike.	Russia

P56-15	Mechta	P	56	15	62 47 33N	155 05 21E	62.7925	155.089166666667	6248'N	15505'E	Ag-Pb-Zn vein , Polymetallic vein(?)	Ag, Pb, Zn	As, Cu	Medium.  Average grade about 1% Pb, and 0.74% Zn, with up to 310 g/t Ag and 0.3 g/t Au.  	Eastern Asia-Arctic: Omsukchan	Tkachenko and others, written commun., 1976-1979; Plyashkevich, 1986; Kopytin, written commun., 1987	A set of en echelon, generally north-south, arcuate fracture zones 3.5-4 km wide and 10 km long host quartz-chlorite-sulfide veins and veinlets.  Area of mineralization extends south to the Maloken district.  Ore bodies form a fan-like structure that branch at the upper levels.  They are hosted by Upper Cretaceous, propylitized, and argillized ignimbrites.  Explosion breccia and tuff is wide-spread.  Main vein minerals are:  silver-bearing galena, sphalerite, chalcopyrite, pyrite, arsenopyrite, freibergite, pyrargyrite, stephanite, famatinite, tennantite, argentite, quartz, chlorite, and hydromica.  Subordinate minerals are:  pyrrhotite, stannite, native gold and silver, feldspar, kaolinite, and carbonate.  Ores are dominated by galena-sphalerite and chalcopyrite-freibergite associations.	Russia

P56-16	Maly Ken	P	56	16	62 43 46N	154 59 33E	62.7294444444444	154.9925	6244'N	15460'E	Sn polymetallic vein   	Sn, Ag		Small.  Partly Mined out.  	Eastern Asia-Arctic: Omsukchan	Pridatko and others, written commun., 1973; Lugov and others, 1974a, b; Shnaider and others, 1977	Deposit consists of metasomatic zones, mainly of quartz-chlorite-hydromica-sulfide composition, with fan-like systems of veins, veinlets, and fracture fillings.  Ore body occurs in Upper Cretaceous volcanic rocks (ignimbrite, rhyolite, andesite, and tuff), that trend north-south and northwest, with a thickness of 60-80 m.  Ore bodies are composed of quartz, chlorite, cassiterite, pyrite, arsenopyrite, lellingite, pyrrhotite, marcasite, stannite, wolframite, galena, sphalerite, chalcopyrite, tetrahedrite-tennantite, argentite, proustite, and native silver and bismuth.  Silver-bearing galena and sphalerite, and tetrahedrite-tennantite and silver sulfosalts, are especially important in the upper levels.	Russia

P56-17	Goletsov (Golets)	P	56	17	62 39 49N	150 06 50E	62.6636111111111	150.113888888889	6240'N	15007'E	Au quartz vein   	Au		Small.  Average grade 20 g/t Au.  	Yana-Kolyma	Kuznetsov, written commun., 1937; Trushkov, written commun., 1937; Skornyakov, written commun., 1953	Numerous steeply-dipping quartz veins and zones of small veinlets occur in folded Lower Jurassic fine-grained sandstone, graywacke, and shale, and less commonly in folded, propylitized, mafic dikes.  Veins average 5-20 cm thick, but some reach 3.5 m thick in the noses of folds.  Veins extend farther down dip than along strike.  Quartz veins contain small amounts of albite, ankerite, mica, chlorite, and rare disseminated arsenopyrite, galena, sphalerite, chalcopyrite, gold, and rutile.  Veins are banded; sulfide accumulations are confined to carbonaceous interbeds.  Deposit is located on a right-lateral, en echelon segment of the Srednekan-Shturm strike-slip fault zone.	Russia

P56-18	Dukat	P	56	18	62 36 06N	155 11 22E	62.6016666666667	155.189444444444	6236'N	15511'E	Au-Ag epithermal vein	Ag, Au		Large.  Proven reserves of 10,000 tonnes Ag and 20 tonnes Au. Hypothetical reserves 40,000 tonnes Ag.  Average grade 1 g/t Au and 300 g/t Ag.  Annual production 0.9 t Au and 900 t Ag.  	Eastern Asia-Arctic: Omsukchan	Brostovskay and others, 1974; Savva and Raevskaya, 1974; Kalinin, 1975a, 1986; Raevskaya, Kalinin, and Natalenko, 1977; Sidorov, 1978; Natalenko and others, 1980; Sakharova and Bryzgalov, 1981; Sidorov and Rozenblum, 1989; Shergina and others, 1990; Pilyasov and Yadryshnikov, 1994; Goncharov, 1995.	Silver occurs in quartz-chlorite-sulfide, adularia-quartz, and rhodonite-rhodochrosite-quartz veins and zones of diverse orientation.  Hydrothermally altered zones and cryptovolcanic breccia bodies also occur.  Ore bodies occur in a sequence of ultrapotassic rhyolites, no older than 93 Ma (K-Ar), in the core of a volcanic dome.  Top of an extensive biotite leucogranite pluton (K-Ar age 802 Ma) is known at depth of more than 1200 m.  Ore zones are up to 1.5 km long and 100 m or more thick.  Silver minerals in the ore include intermetallic compounds, simple and complex two-metal sulfides, sulfoantimonides, sulfostannites, and selenides.  Acanthite, pyrargyrite, stephanite, native silver, and kstelite predominate.  Galena, sphalerite, pyrite, and chalcopyrite are abundant; arsenopyrite, pyrrhotite, magnetite, tetrahedrite, boulangerite, stannite, and other minerals are less common.  Mineralization occurred in three stages:  (1) quartz-chlorite-sulfide,  (2) quartz-adularia, and  (3) quartz-rhodochrosite-rhodonite.  Ore bodies of the first two stages are bordered by quartz-hydromica alteration.  The third stage consists of replacement of rhodochrosite by rhodonite, and the formation of skarn with garnet, helvite, epidote, albite, as a result of the intrusion of the granite pluton.  K-Ar ages of 77 Ms for ore stages. Cassiterite ore bodies are related to late tourmalinization.	Russia

P56-19	Podgornoe	P	56	19	62 37 26N	155 48 05E	62.6238888888889	155.801388888889	6237'N	15548'E	Au-Co-As vein   	Au, Co, Bi, Te, (As)		Small.  Ranges 2.5 to 139 g/t Au and 0.2 up to 2.6% Co.  	Eastern Asia-Arctic: Omsukchan	Osipov, and Sidorov, 1973; Savva, written commun., 1980	Conformable and cross-cutting podiform bodies and veins are associated with sulfidization, silicification, tourmalinization, and chloritization.  Ores are composed of quartz, tourmaline, chlorite, biotite, and Co-lellingite; with subordinate arsenopyrite, native bismuth, bismuthinite, gold, calaverite, tetradymite, molybdenite, pyrite, chalcopyrite, sphalerite, galena, tennantite, chalcocite, fluorite, and aragonite.  District is located in contact-metamorphosed, Lower Cretaceous sandstone and siltstone at the contact of the Late Cretaceous Omsukchan leucocratic biotite granite and hybrid granodiorite.	Russia

P56-20	Khataren-Industrial	P	56	20	62 33 28N	155 33 50E	62.5577777777778	155.563888888889	6233'N	15534'E	Sn silicate-sulfide vein   	Sn		Small.  Almost completely worked out at average grade of 1% Sn.  	Eastern Asia-Arctic: Omsukchan	Lugov, Makeev, and Potapova, 1972; Lugov, 1986	Several tens of banded veins, predominantly of quartz-tourmaline-cassiterite composition, occur in medium-grained biotite granite of the Late Cretaceous Omsukchan pluton.  Veins are nearly vertical and trend northeast.  Veins are thin, but range from several hundreds of meters to 1 km or more in length.  Mineralization occurred in five stages:  (1) quartz-tourmaline alteration;  (2) quartz-tourmaline-cassiterite, with apatite, magnetite, hematite, muscovite, siderophyllite, albite, epidote, allanite, and gadolinite (REE);  (3) quartz-chlorite-cassiterite, with hematite, magnetite, xenotime, arsenopyrite, and fluorite;  (4) a local sulfide stage, with pyrite, marcasite, pyrrhotite, chalcopyrite, and molybdenite; and  (5) fluorite, with calcite, adularia, kaolinite minerals, and quartz.  Cassiterite is commonly present as isometric and prismatic crystals of dipyramidal habit.	Russia

P56-21	Utinka	P	56	21	62 30 46N	151 04 11E	62.5127777777778	151.069722222222	6231'N	15104'E	Au quartz vein   	Au		Small.  Discovered in 1929.  Partly mined out.  Ranges 0.1 to 3,923 g/t Au; ore shoots range 5 to 3,923 g/t Au.  Produced 12 tonnes Au.  	Yana-Kolyma	Yakushev, written commun., 1950; Skornyakov, written commun., 1953	A Late Jurassic suite of ore-bearing dikes that extend for about 35 km cuts a Middle Jurassic sedimentary sequence at an acute angle to bedding.  Sedimentary rocks are isoclinally folded into west-northwest trending structures.  Main ore body extends 12 km and occurs in a steeply dipping dike, 0.4 to 1.3 m thick, of hydrothermally altered andesite porphyry.  Dike intensely crushed and tectonized.  Gold-bearing quartz veins form complicated, often diagonally cross-cutting, systems within the dike.  Some quartz veins also cut the dikes obliquely, and continue out into the surrounding sedimentary rocks.  Arsenopyrite, pyrite, and pyrrhotite make up several per cent of the veins; gold, galena, sphalerite, chalcopyrite, jamesonite, Bi-boulangerite, tetrahedrite, scheelite, marcasite, and stibnite also occur.  Gold distribution is quite irregular; individual ore shoots are 5 to 30 m in strike and several hundreds of meters in width.	Russia

P56-22	Nadezhda	P	56	22	62 22 46N	150 04 30E	62.3794444444444	150.075	6223'N	15005'E	Au quartz vein   	Au		Small.  Ranges 10.2 to 660 g/t Au.  	Yana-Kolyma	Amelchenko, written commun., 1964; Zenkov and others, written commun., 1966	Short, lenticular quartz veins, reticulate veinlets, and silicified dikes of quartz-albite porphyry occur within elongate fracture zones up to 15 m wide.  Quartz veins and veinlets contain arsenopyrite, pyrite, galena, gold, and stibnite. Deposit is located near the Debin strike-slip fault zone, in an anticlinal fold with Lower to Middle Jurassic (Toarcian and Aalenian) siltstone and shale exposed in the core, and Middle Jurassic (Bajocian-Bathonian) siltstone and sandstone in the limbs.  	Russia

P56-23	Galimoe	P	56	23	62 20 32N	155 49 19E	62.3422222222222	155.821944444444	6221'N	15549'E	Sn silicate-sulfide vein   	Sn, Ag		Small.  Most of reserves mined out.  Average grade 0.26% Sn.  	Eastern Asia-Arctic: Omsukchan	Chaikovsky, 1960; Lugov, 1986	Consists of Sn in conformable and cross-cutting ore bodies that are formed in conformable, gently-dipping ore bodies that replace Lower Cretaceous argillite and conglomerate at the contact with Early Cretaceous diorite porphyry and felsite sills.  Ore is banded or massive quartz-tourmaline altered rocks with veinlets and disseminations of cassiterite, chlorite, pyrite, marcasite, arsenopyrite, wolframite stannite, chalcopyrite, sphalerite, and galena.  Silver occurs native and with sulfides, tetrahedrite-tennantite, and sulfosalts.  Paired mineralized layers occur at the roof and floor of the sills, connected by transverse, cross-cutting veins of similar composition; which contain the main bulk of metal.  Ore bodies persist along dip.	Russia

P56-24	Nevskoe	P	56	24	62 15 36N	155 25 56E	62.26	155.432222222222	6216'N	15526'E	Porphyry Sn   	Sn, W, Se		Small to Medium.  Most of reserves mined out.  	Eastern Asia-Arctic: Omsukchan	Lugov, Makeev, and Potapova, 1972; Lugov, 1986	District extends north-northwest along a belt of intensely fractured Lower Cretaceous clastic sedimentary rocks.  Belt is 180 to 350 m wide and separates granite of the Upper Cretaceous Nevsky pluton from extrusive late Cretaceous rhyolite to the west.  Granite contact is tectonic in character.  Rocks along the belt are replaced by quartz, tourmaline, pyrophyllite, kaolinite, and locally, by dumortierite and topaz.  Ore bodies coincide with the most altered rocks; they are pipe-like, and strike for hundreds of meters.  Ores are fine-grained, complexly intergrown, and are composed mainly of pyrophyllite, topaz, quartz, muscovite, and cassiterite.  Tourmaline, chlorite, wolframite, arsenopyrite, chalcopyrite, galena, sphalerite, pyrite, pyrrhotite, marcasite, tetrahedrite-tennantite, stannite, rutile, and scheelite are wide-spread; semseyite, guanajuatite, laitakarite, silver, zunyite, apatite, fluorite and other minerals are rare.  Sn content decreases with depth, as do topaz and pyrophyllite; but quartz increases.	Russia

P56-25	Krokhalin	P	56	25	62 22 03N	152 01 06E	62.3675	152.018333333333	6222'N	15201'E	Sb-Au vein (simple Sb)   	Sb, Au		Small.  Ranges 0.5 to 33% Sb (average grade of 11.4% Sb). Ranges 0.5 to 93 g/t Au (average grade of 3.9 g/t Au).  	Yana-Kolyma	Panychev, and Fedotov, written commun., 1973	A set of beresitized porphyry dikes with gold-antimony minerals occurs in Lower Jurassic flysch.  Main ore-bearing dike can be traced for 3.5 km; it is usually about 0.7 to 1.5 m thick but some reach 15 m thick.  Dike is cut by ladder veins and veinlets composed of albite, carbonate, and quartz with lenses of massive stibnite up to 2.5 m long and 1.5 m thick.  Stibnite is also disseminated and in veinlets in the dike.  Stibnite is associated with fine, disseminated gold, pyrite, arsenopyrite, chalcopyrite, and bournonite.	Russia

P56-26	Srednekan	P	56	26	62 19 45N	152 21 49E	62.3291666666667	152.363611111111	6220'N	15222'E	Au quartz vein   	Au		Medium.  Low-grade ores.  Sulfide concentrates from pilot mill contained up to 1736 g/t Au and 213 g/t Ag.  	Yana-Kolyma	Skornyakov, written commun., 1953	A suite of Late Jurassic diorite porphyry and granite porphyry dikes is cut by transverse and oblique sets of steeply-dipping to sometimes gently-dipping quartz veinlets.  Dikes are broken into boudins, and are intensely fractured, altered, and tectonized.  The necks between boudins are intensely sulfidized.  Ore bodies are composed of quartz, albite, calcite, chlorite, sericite, siderite, arsenopyrite, pyrite, pyrrhotite, sphalerite, galena, chalcopyrite, gold, magnetite, and rutile.  Gold is present in discrete masses, in dendrites, and in veinlets; masses of gold up to 3 g have been found.  Deposit is located along the Srenekan-Shturm strike-slip fault zone.  Suite of gold-bearing dikes obliquely cut the Lower and Middle Jurassic clastic sedimentary rock sequence, which has been deformed into steep east-west and northwest folds.  	Russia

P56-27	Kuzmichan	P	56	27	62 18 26N	152 38 41E	62.3072222222222	152.644722222222	6218'N	15239'E	Clastic sediment-hosted Hg or hot-spring Hg?	Hg		Small.  	Yana-Kolyma	Babkin, 1969	Consists of Hg in Upper Triassic sandstone and shale that are intruded by porphyritic biotite granite and related dikes of the deposit.  The sedimentary and intrusive rocks are cut by northwest-, east-west-, and northeast-trending faults.  Disseminated veinlets of cinnabar occur in deformed and fractured zones which trend northwest; the zones are 4-5 m thick and about 70-80 m long.  Cinnabar also occurs as stockworks in fractured wall rocks.  Gangue minerals are quartz, carbonate, and chalcedony.  Ore minerals are cinnabar, metacinnabarite, pyrite, and marcasite.	Russia

P56-28	Kinzhal	P	56	28	62 16 43N	151 58 28E	62.2786111111111	151.974444444444	6217'N	15158'E	Sn silicate-sulfide vein   	Sn	As, Zn	Small.  Sulfide-tin concentrates contain up to 14.3 g/t gold and 112.4 g/t silver.	Eastern Asia-Arctic: Okhotsk	Matveenko, 1959	Approximately sixty ore bodies include typical fracture-filling veins, altered veins, and mineralized breccias that occur in hornfels and spotted cordierite-mica schist at the contact of the late Cretaceous Verkhne-Orotukan granite.  Veins trend northeast with dips of 30 to 80.  They are several hundreds of meters to 1 km long, average 0.1-0.3 m thick, and locally reach 4 m thick.  Tourmalitization is prominent in deformed belts and adjacent rocks.  Quartz and tourmaline are the main gangue minerals.  Main ore minerals are crystalline and colloform cassiterite, arsenopyrite, pyrite, sphalerite, and marcasite.  Calcite, chlorite, sericite, apatite, fluorite, rutile, sphene, pyrrhotite, chalcopyrite, galena, and stannite are less common.  	Russia

P56-29	Kamenistoe	P	56	29	62 16 11N	151 44 28E	62.2697222222222	151.741111111111	6216'N	15144'E	Au quartz vein   	Au		Small.  Ranges 0.1 to 190 g/t Au.  	Yana-Kolyma	Skornyakov, written commun., 1953	Quartz veins are confined to mineralized and fractured belts in sedimentary rocks.  Fractured belts average 300 m long and are 0.2-3.5 m thick.  Quartz veins are 20 to 25 m long and 0.6-1 m thick.  Most productive quartz vein is 140 m long and varies in thickness from 0.3 to 3.6 m.  It contains disseminated arsenopyrite, pyrite, and gold.  Two ore bodies have been defined.	Russia

P56-30	Yugler	P	56	30	62 09 57N	150 37 20E	62.1658333333333	150.622222222222	6210'N	15037'E	Au quartz vein   	Au		Small.  Ore body partly mined out in 1940-50's.  Produced about 1.1 tonnes Au from ore containing 12.2 g/t Au (about 90,160 tonnes of ore).  	Yana-Kolyma	Novoselov, written commun., 1964	Deposit is associated with an en echelon, granite porphyry dike that intrudes Upper Triassic volcaniclastic rocks and Lower and Middle Jurassic shale and siltstone.  Quartz veins with intergrown carbonates and disseminated pyrite, arsenopyrite, galena, boulangerite, and gold are confined to a one or both contacts of the dike.  Veins cut the dike at an acute angle and extend some distance from dike.  Veins are 100-250 m long and usually are about 0.1 to 1 m thick, but may range up to 3.8 m thick.  Deposit is located near the Debin-Umar strike-slip fault.	Russia

P56-31	Laryukov	P	56	31	62 05 32N	151 52 11E	62.0922222222222	151.869722222222	6206'N	15152'E	Au quartz vein   	Au	As	Small.  Ranges trace to 371 g/t Au	Yana-Kolyma	Skornyakov, written commun., 1953	A set of mineralized fracture zones with quartz veins, one of which is economic.  Vein is 160 m long, up to 1.4 m thick, and is known to a depth of 40 m.  Gold is concentrated in the footwall with arsenopyrite and pyrite.  Ore bodies are controlled by bedding dislocations related to reverse and thrust faults.  Host Lower and Middle Triassic clastic rocks have been deformed into linear and branching folding that trends northeast and east-west.	Russia

P56-32	Vetvisty	P	56	32	62 06 49N	152 07 40E	62.1136111111111	152.127777777778	6207'N	15208'E	Au-Ag epithermal vein	Ag, Au		Small.  	Eastern Asia-Arctic: Okhotsk	Rozenblyum, oral commun., 1991	A set of silver-bearing zones with numerous veins and veinlets extends up to 2.2 km that average 2-2.8 m thick.  These occur in quartz-sericite-chlorite altered rocks developed from contact-metamorphosed Middle Triassic shale.  Main ore mineral is argentite; arsenopyrite, pyrite, and anglesite are common; and chalcopyrite, stephanite, proustite, and electrum also occur.  Au:Ag ratio ranges from 1:1000 to 1:5000.  Mineralization occurs over the southeastern portion of the Late Cretaceous Verkhne-Orotukan granite pluton within a circular structure about 5 km in diameter.  Hypabyssal bodies and dikes of Late Cretaceous granite porphyry occur along arcuate faults bounding the south side of the structure.  Bodies of Late Cretaceous and Paleogene rhyolite occur along a north-south fracture cutting the structure.  Ore bodies are controlled by northwest faults and are associated with the rhyolite dikes.	Russia

P56-33	Okhotnichie	P	56	33	62 04 29N	155 13 52E	62.0747222222222	155.231111111111	6204'N	15514'E	Sn silicate-sulfide vein   	Sn	W, Bi, Co	Small.  Partly mined out.  Up to 59 g/t Ag and 0.4 g/t Au.  	Eastern Asia-Arctic: Omsukchan	Lugov, 1986	Cassiterite-quartz-chlorite veins contain small amounts of tourmaline, sericite, carbonates, and sulfides (arsenopyrite, pyrite, chalcopyrite, galena, and sphalerite).  Most veins are in weakly contact-metamorphosed, Upper Triassic sandstone, siltstone, and shale; but some are in Albian-Cenomanian andesite and tuff; especially the upper portions of the veins.  Subordinate minerals are wolframite, scheelite, bismuthinite, native bismuth, tetradymite, cobaltite, safflorite, tetrahedrite-tennantite, stannite, xenotime, and orthite.  Veins are structurally complex.  Ore bodies occur around the periphery of a circular volcanotectonic structure and show no relationship to the intrusive rocks.  Veins generally occur in north-south fractures and their northwest splays are associated with the Omsukchan fault zone.	Russia

P56-34	Trood	P	56	34	62 03 43N	155 42 21E	62.0619444444444	155.705833333333	6204'N	15542'E	Sn polymetallic vein   	Sn, Pb Zn, Ag		Small to medium.  Ranges 0.1 to 46% Sn, 50 to 4000 g/t Ag, and up to 1.6 g/t Au, 1.9% Pb, and 1.5% Zn.  	Eastern Asia-Arctic: Omsukchan	Lugov and others, 1974a, b; Pridatko and Ananyin, 1980	Cassiterite-quartz-sulfide, sulfide-quartz, and quartz-tourmaline veins and mineralized zones extend for hundreds of meters.  They are confined to steeply-dipping northwest-trending fractures along a deep fault.  Host rocks are mainly Upper Cretaceous andesite flows, tuff, and tuffaceous flows that are underlain by Upper Triassic clastic deposits.  Granite and diorite are less significant.  Area consists of a volcanic dome broken by a complex fracture pattern.  Volcaniclastic rocks are interlayered with Late Cretaceous hypabyssal intrusive bodies.  Sequence is intruded and metamorphosed by tin-bearing granite of the Omsukchan complex.  Ore bodies are composed of pyrite, marcasite, quartz, cassiterite, arsenopyrite, hydromicas, galena, sphalerite, chlorite, siderite, chalcopyrite, calcite, tetrahedrite-tennantite, stannite, tourmaline, anatase, fluorite, pyrrhotite, brookite, and apatite.  Deposits are characterized by high content of Ag, Id, and Cd.	Russia

P56-35	Zatessnoe	P	56	35	61 52 03N	152 35 28E	61.8675	152.591111111111	6152'N	15235'E	Au quartz vein   	Au		Small.  High-grade ore.	Yana-Kolyma	Gutt, written commun., 1949; Baranov, written commun., 1960	Consists of a set of quartz veins that occur in a northeast-trending fractured belt.  Veins are up to 700 m long and dip to the south at 40-70.  Veins cut a gently-folded Triassic sedimentary sequence.  Veins are usually no more than 20-30 cm thick and are composed of quartz, calcite, arsenopyrite, and gold.  Individual gold grains may range up to 8 mm. Gold values are high, but erratically distributed.	Russia

P56-36	Ircha	P	56	36	61 50 47N	155 39 00E	61.8463888888889	155.65	6151'N	15539'E	Porphyry Sn   	Sn, Ag	Cu	Medium.  Considerable potential.  	Eastern Asia-Arctic: Omsukchan	Ananyin, Pridatko, and Terentiev, 1980; Kuleshov, Kopytin, and Pristavko, 1984; Lugov, 1986; Plyashkevich, 1986	This stockwork-like deposit trends northwest in Upper Cretaceous andesite which is underlain by Jurassic tuff and sedimentary rocks.  Ore zone extends for many hundreds of meters and varies in thickness from tens to hundreds of meters.  Ore body is near the contact of a heterogeneous Late Cretaceous pluton composed of gabbro, diorite, and rhyolite.  Jurassic rocks are weakly contact-metamorphosed; the Upper Cretaceous andesite is propylitized.  Ore bodies are en echelon systems of podiform veins, veinlets, and oblique-to-vertical pipe-like bodies.  Gangue is mainly quartz, with intergrown tourmaline, chlorite, sericite, adularia, calcite, and fluorite.  Ore minerals are cassiterite, arsenopyrite, chalcopyrite, pyrite, pyrrhotite; and less common wolframite, scheelite, molybdenite, bismuthinite, bismuth, stannite, teallite, marcasite, galena, sphalerite, sternbergite, freibergite, pyrargyrite, acanthite, and native silver.  Cassiterite deposition was preceded by fracturing of the earlier quartz-tourmaline and quartz-chlorite altered rocks.	Russia

P56-37	Netchen-Khaya	P	56	37	61 42 14N	151 32 15E	61.7038888888889	151.5375	6142'N	15132'E	Granitoid-related Au   	Au, Mo, Bi		Small to medium. Approximate resource of 70 tonnes Au.	Eastern Asia-Arctic: Verkhne-Kolyma	Aksenova, 1990	Zones of en echelon quartz and quartz-tourmaline-sulfide veins, trend northeast in the apical portion of a Cretaceous multiphase intrusion composed of gabbro, diorite, granodiorite, porphyritic granite, and aplite.  Pluton is somewhat elongated to the north, and extends over an area of about 6 by 4.5 km.  Ore bodies are 100-150 m long and 1.5-2 m thick.  Veins are associated with zones of greisenization.  Ore minerals are arsenopyrite (which comprises up to 30% of the vein), lellingite, pyrite, scheelite, molybdenite, tetradymite, bismuthinite, and gold.  Fluorite occurs in the veins; and anomalous values of Ag, Sn, and W are detected.	Russia

P56-38	Ossolonyn	P	56	38	61 43 29N	153 18 47E	61.7247222222222	153.313055555556	6143'N	15319'E	Sn greisen   	Sn		Small.  	Eastern Asia-Arctic: Verkhne-Kolyma	Matveenko, 1959	Greisenized granite porphyry bodies, with zoned quartz-topaz greisen and sericitic alteration, host quartz-topaz-fluorite and quartz-fluorite-sericite veinlets containing cassiterite, arsenopyrite, pyrite, and small amounts of tourmaline, chlorite, apatite, and rutile.  Ores contain notable tungsten and bismuth.  Seven ore bodies trend northwest in contact-metamorphosed Triassic sandstone and shale near the Upper Cretaceous Sredne-Buyund granite.	Russia

P56-39	Bokhapcha	P	56	39	61 44 56N	150 43 34E	61.7488888888889	150.726111111111	6145'N	15044'E	W vein and greisen   	W		Medium.  Ranges from 0.15 to 4.27% WO3, with minor Au, Sn, Bi.  	Yana-Kolyma	Chicherin, written commun., 1970, 1978; Kolesnichenko, Pristavko, and Sobolev, 1985	A linear stockwork composed of variably oriented quartz, carbonate-quartz, and feldspar-quartz veins and veinlets; quartz-muscovite, quartz-topaz, quartz-tourmaline greisens; and greisenized aplites that contain wolframite and some scheelite.  Stockwork extends over an area of about 1600 m by 250 m.  Wolframite occurs as thick tabular crystals and masses up to 30 cm in size.  Minor or rare ore minerals include arsenopyrite, pyrite, molybdenite, cubanite, bismuthinite, and cassiterite.  Ore-bearing stockwork is elongated to the northeast and occurs in contact-metamorphosed Upper Triassic sandstone and shale at a steeply dipping contact with the northwest portion of the Lower Cretaceous Bokhapcha granite.	Russia

P56-40	Ekspeditsionnoe	P	56	40	61 41 12N	150 32 44E	61.6866666666667	150.545555555556	6141'N	15033'E	Au quartz vein   	Au		Small.  Ranges from trace to tens of g/t Au.  	Yana-Kolyma	Baranov, written commun., 1949	Quartz veins, veinlets, and mineralized fracture zones trend east-west and northeast in Upper Triassic shale, siltstone, and sandstone.  Ore bodies generally extend east-west over an area about 1.8 km long and 200-300 m wide.  In addition to quartz, the veins contain calcite, arsenopyrite, pyrite, and gold.  Veins and mineralized zones are up to 160 m long and 1.5 thick.  Ore bodies cut porphyritic dikes, which themselves intrude folds at an acute angle.	Russia

P56-41	Maltan Stock	P	56	41	61 27 40N	150 52 18E	61.4611111111111	150.871666666667	6128'N	15052'E	Granitoid-related Au   	Au, Bi, Te	Mo	Small.  Au and Ag contents variable.  Samples with up to 242 g/t Au, minor Bi, W, and Co.  	Eastern Asia-Arctic: Okhotsk	Kamenikhin and Shtokolova, written commun., 1986; Malinovsky, written commun., 1970; Osipov and Savva, written commun., 1975; Voroshin and others, written commun., 1990	Deposit is associated with en echelon fracture zones in Cretaceous biotite gabbro, quartz diorite, granodiorite porphyry, and porphyritic granite; that intrude Middle and Upper Triassic sedimentary rocks.  En echelon structures are 2.5 to 3 km long.  Ore bodies are controlled by northeast fractures that are transverse to the fractures that control the intrusions.  Mineralization consists of quartz, quartz-carbonate, and sulfide-quartz veins that range from tens to hundreds meters long and from 10-20 cm thick.  Ore minerals are arsenopyrite, lellingite, molybdenite, galena, sphalerite, pyrrhotite, pentlandite, scheelite, boulangerite, native bismuth, bismuthinite, bismuth sulfotellurides, silver tellurides, and native gold (450-1000 fine).	Russia

P56-42	Dneprov	P	56	42	61 19 32N	151 36 20E	61.3255555555556	151.605555555556	6120'N	15136'E	Sn silicate-sulfide vein and Sn greisen  	Sn	W, Mo, Bi, Au, Ag	Medium.  Produced 5,000 tonnes Sn.	Eastern Asia-Arctic: Verkhne-Kolyma	Lugov and others, 1974a, b	Tourmaline-quartz, fluorite-tourmaline, and sulfide-tourmaline veins; most of which trend approximately north-south, but some trend east-west.  Veins occur with quartz-tourmaline, tourmaline-topaz, and muscovite-topaz-quartz tin-bearing greisens.  Veins average about 70 m long, with a maximum length of 600 m, and range from 0.5-3 m thick.  Main gangue minerals are quartz, tourmaline, topaz, fluorite, muscovite, chlorite, calcite, and albite.  Main ore minerals are arsenopyrite, lellingite, cassiterite, ferberite, marmatite, chalcopyrite, pyrite, pyrrhotite, and magnetite.  Minor minerals are beryl, zircon, xenotime, monazite, yttrium-bearing fluorite, apatite, siderite, stannite, galena, marcasite, jamesonite, tetrahedrite, tennantite, bismuthite, molybdenite, native bismuth, gold, silver, and colloform cassiterite.  Ore bodies occur in 12 separate areas along contacts of subalkalic porphyry granite, granite porphyry, and microgranite of the Upper Cretaceous Dneprov pluton; both within and adjacent to pluton.  Main part of the Sn reserves occur along granite margin in a northeastern-trending band.  Some mineralization occurs in contact-metamorphosed Triassic tuff and sedimentary rocks.  Freibergite and sulfides increase with depth.	Russia

P56-43	Kheta	P	56	43	61 05 59N	151 46 45E	61.0997222222222	151.779166666667	6106'N	15147'E	Sn polymetallic vein  	Sn, Zn, Pb, Cu, Bi, Ag		Small.  Moderate Sn content.  Ag values up to 80 g/t or more.  	Eastern Asia-Arctic: Verkhne-Kolyma	Chaikovsky, 1960; Lugov, Makeev, and Potapova, 1972; Lygov and others, 1974a, b	Three pipe-like, steeply dipping, explosion breccia bodies in a volcanic neck cover about 1400 m2.  Breccia bodies occur in sericitized, kaolinized, chloritized, and silicified Upper Cretaceous rhyolite and associated tuff.  Volcanic rocks are intruded by trachyrhyolite and basalt dikes.  Disseminated veinlets, stockworks, and some massive cassiterite-sulfide and sulfide-stannite ores, occur within intensely fractured and hydrothermally altered pipe-like bodies, separated by weakly mineralized rock.  Ore is composed of quartz, iron chlorite, siderite, fluorite, sphalerite, cassiterite, pyrite, stannite, galena, and chalcopyrite; with subordinate sericite, kaolinite, alunite, pyrrhotite, arsenopyrite, marcasite, native bismuth, native lead, tetrahedrite-tennantite, pyrargyrite, polybasite, argyrodite, canfieldite, famatinite, and argentite.  Mineralization consisted of metasomatism superimposed on repeated igneous events.	Russia

P56-44	Suvorov	P	56	44	61 00 05N	152 09 25E	61.0013888888889	152.156944444444	6100'N	15209'E	Rhyolite-hosted Sn   	Sn		Small.  	Eastern Asia-Arctic: Verkhne-Kolyma	Lugov and others, 1974a, b; Flerov, 1974	Colloform cassiterite nodules (wood tin) are present in intensely silicified and kaolinized, fluidal rhyolite, agglomeratic vitric tuff flows, and tuff- and lava-breccia.  The volcanic rocks, of Upper Cretaceous age, are associated with vent facies volcanism.  Cassiterite is associated with fine-grained quartz, hematite, chlorite, kaolinite, pyrite, and arsenopyrite.  Ore is characterized by high iron and indium.	Russia

P56-45	Zerkalnoe	P	56	45	60 57 55N	151 09 58E	60.9652777777778	151.166111111111	6058'N	15110'E	Au-Ag epithermal vein	Au, Ag, Bi, Te		Small.  Ranges 0.4 to 39 g/t Au and 18 to 349 g/t Ag.  	Eastern Asia-Arctic: Verkhne-Kolyma	Ponomarev and Ivanyuk, 1988	Zones of disseminated veinlets occur in a granite porphyry dike 400 m long and 60 m thick that intrudes a Late Cretaceous diorite pluton.  Deposit consists of quartz and quartz-carbonate veinlets containing silver sulfosalts, tetradymite, petzite, hessite, electrum, arsenopyrite, galena, and sphalerite.	Russia

P56-46	Agat	P	56	46	60 57 59N	150 53 17E	60.9663888888889	150.888055555556	6058'N	15053'E	Au-Ag epithermal vein	Au, Ag	Pb, Zn, Cu	Small. Reserves of 3.8 tonnes Au and 70 tonnes Ag. Considerable potential.  Average contents 6.5 to 11.8 g/t Au and 65 to 174 g/t Ag.  Bonanza ores contain up to 30 kg/t Au.  	Eastern Asia-Arctic: Okhotsk	Naborodin, written commun., 1971, 1977	Several tens of quartz, carbonate-quartz, and sulfide-quartz veins occur in sheets of propylitized Cretaceous andesite.  Veins are generally simple in form; they are controlled by fissures trending northwest to north-south.  Ore bodies are usually tens to hundreds of meters long, but sometimes up to 2 km in length. The ore bodies average 0.2-1 m thick, but some reach 50 m.  Hydromicatization, chloritization, and silicification are typically associated with the veins, but less eroded veins are accompanied by weak adularization.  Symmetrical crustification-banding and complex deformation structures are characteristic of the veins.  Main gangue minerals are quartz and carbonates, including calcite, dolomite, siderite, manganese-rich siderite, rhodochrosite, and kutnahorite.  Barite, chalcedony, and opal occur near the periphery of the deposit.  Main ore minerals are:  galena, sphalerite, chalcopyrite, marcasite, and pyrite.  Arsenopyrite, pyrrhotite, tetrahedrite-tennantite, tellurides, sulfosalts of silver and other minerals are present locally.  Gold occurs in the form of electrum (550-500 fine).  Average sulfide content of veins is 5-10%, but locally ranges to 20-30%. A gold-sphalerite-galena-quartz assemblage is the most productive, and is present in most veins.  This assemblage also contains chalcopyrite, tetrahedrite-tennantite, tellurides of gold and silver, pyrargyrite, stephanite, and argentite.  The Au:Ag ratio varies from 5:1 to 1:100, and averages about 1:2-1:5.	Russia

P56-47	Khakandya	P	56	47	60 49 27N	153 32 09E	60.8241666666667	153.535833333333	6049'N	15332'E	Porphyry Mo 	Mo		Small.  Ranges 0.1 to 6.7% Mo, up to 589 g/t Ag, and up to 6.8 g/t Au.  	Eastern Asia-Arctic: Koni-Yablon	Kobylyansky, written commun., 1970	Deposit consists of quartz veins containing molybdenite, arsenopyrite, sphalerite, and galena, and vein-like bodies of quartz-muscovite greisens cut by molybdenite veinlets.  More than 20 ore bodies are known; they are about 120-180 m long and occur in greisenized Late Cretaceous granodiorite and subalkalic granite.  Molybdenum is associated with polymetallic veins containing galena, sphalerite, chalcopyrite, and pyrite; and up to 589 g/t silver and 6.8 g/t gold.	Russia

P56-48	Svetloe	P	56	48	60 46 01N	150 15 43E	60.7669444444444	150.261944444444	6046'N	15016'E	Sn polymetallic vein   	Sn		Small.  	Eastern Asia-Arctic: Verkhne-Kolyma	Umitbaev, 1986	Deposit consists of a set of steeply dipping, quartz-chlorite veins, up to 1 to 2 m thick, that cut contact-metamorphosed Permian sandstone, shale, and tuffaceous shale.  Veins contain fine-grained pyrite, chalcopyrite, and pyrrhotite.  Deposit occurs in the marginal portion of a domal structure related to the intrusion of a Late Cretaceous leucogranite.	Russia

P56-49	Nyavlenga	P	56	49	60 44 06N	153 28 05E	60.735	153.468055555556	6044'N	15328'E	Au-Ag epithermal vein	Au, Ag		Small. Reserves of 8.4  tonnes Au and 475 tonnes Ag. Considerable potential.  Ranges 6.4 to 14.5 g/t Au and 241.5 to 431 g/t Ag.  	Eastern Asia-Arctic: Koni-Yablon	Bocharnikov, written commun., 1977; Bocharnikov and Ichetovkin, 1980; Savva, written commun., 1981; Demin, 1990; P.Layer, V.Ivanov, and T.Bundtzen, written commun., 1994.	Altered chlorite-quartz, adularia-chlorite-quartz, and quartz veins and veinlets occur in the middle of a volcanotectonic depression that occurs at the intersection of north-south, northeast and east-west faults.  Approximately 20 ore bodies, each about 10-20 m thick, occur in three zones.  Two of the zones are in Lower Cretaceous propylitized andesite; and the third one is in an altered quartz-sericite-pyrophyllite rock developed from rhyolite fragmental flows.  Ore textures are colloform to indistinctly banded, massive, and brecciated.  Ore minerals are pyrite, sphalerite, galena, chalcopyrite, arsenopyrite, pyrrhotite, bornite, jamesonite, wittichenite, native silver, kstelite, freibergite, acanthite, stephanite, polybasite, stromeyerite, canfieldite, molybdenite, and hematite.  A gold-silver-chlorite-quartz phase of mineralization is locally superimposed on a later garnet-epidote-quartz association with hematite and magnetite.  Native silver in pyrite is common, and becomes coarser grained with increased thermal metamorphism.  Molybdenum and polymetallic mineralization are associated with the later granitic rocks.  Ar-Ar age dating of adularia in the Au-Ag vein yields an isotopic age of 94 Ma.	Russia

P56-50	Skarnovoe	P	56	50	60 45 45N	150 38 24E	60.7625	150.64	6046'N	15038'E	Pb-Zn-Ag skarn   	Zn, Pb, Ag		Small.  	Eastern Asia-Arctic: Okhotsk	Umitbaev, 1986	Podiform sulfide-polymetallic ore bodies extend for several tens or hundreds of meters and are several meters thick.  They are controlled by weak fractures in a Upper Triassic (Norian) limestone that has been altered to skarn.  Amount of skarn decreases away from a granite pluton.  Pyrrhotite skarn bodies contain varying amounts of magnetite, wollastonite, tremolite, epidote, zoisite, garnet, and carbonate.  Main ore minerals are sphalerite, accompanied by galena.  Silver is mainly in the galena.  Skarn also contains gold and rare earth elements.	Russia

P56-51	Kandychan	P	56	51	60 35 59N	150 20 18E	60.5997222222222	150.338333333333	6036'N	15020'E	Sn polymetallic vein   	Sn, Ag		Small.  Partly mined out.  Produced 2,000 tonnes Sn.	Eastern Asia-Arctic: Verkhne-Kolyma	Firsov, 1972; Lugov and others, 1974a, b; Savva, written commun., 1980	Consists of groups of veins and veinlets occur in a generally north-south band, more than 2 km long and 500 to 600 m wide, in Upper Cretaceous subvolcanic and flow rocks of moderately felsic to felsic composition.  Volcanic rocks are propylitized, silicified, and argillized.  Ore bodies consist of quartz-chlorite-cassiterite-sulfide veins with various carbonates (calcite, siderite, dolomite), sericite, hydromica, kaolinite, dickite, pyrophyllite, fluorite, and tourmaline.  Sulfide minerals include stannite, pyrargyrite, hessite, and argentite; as well as pyrite, chalcopyrite, arsenopyrite, marcasite, pyrrhotite, sphalerite, galena, bornite, and covellite.  Deposits are characterized by high silver, bismuth, cobalt, and gold.  Sulfide veins with colloform cassiterite give way at depth to low-sulfide chlorite-quartz veins with crystalline cassiterite.	Russia

P56-52	Kolkhida	P	56	52	60 37 11N	151 27 18E	60.6197222222222	151.455	6037'N	15127'E	Au-Ag epithermal vein	Ag, Au, Sn		Small.  	Eastern Asia-Arctic: Okhotsk	Umitbaev, 1986	Quartz-carbonate vein with adularia, chlorite, manganocalcite, kaolinite, pyrite, chalcopyrite, tetrahedrite-tennantite, polybasite, native silver, kstelite, argentite, stephanite, galena, sphalerite, marcasite, and cassiterite.  Vein cuts hydrothermally altered Upper Cretaceous brecciated flows and tuff, mainly of rhyolite-dacite, near the contact with a granite porphyry dike.  Au:Ag ratio is about 1:1000.  Vein occurs at the southern end of a small volcanotectonic structure.	Russia

P56-53	Verkhne-Seimkan	P	56	53	60 31 06N	149 59 48E	60.5183333333333	149.996666666667	6031'N	14960'E	Co-Bi-As vein   	Co, Bi		Small.  	Eastern Asia-Arctic: Verkhne-Kolyma	Demin, written commun., 1945; Umitbaev, 1986.	Sets of quartz, quartz-chlorite, and quartz-tourmaline veins in hornfelsed contact-metamorphosed sedimentary rocks near the contact of the Late Cretaceous Seimkan multiphase granitic pluton.  Main ore minerals are cobaltite and cobalt-bearing arsenopyrite.  Subordinate minerals are chalcopyrite, galena, sphalerite, pyrite, marcasite, pyrrhotite, boulangerite, lellingite, glaucodot, bismuthinite, native bismuth, and molybdenite.	Russia

P56-54	Utessnoe	P	56	54	60 25 32N	150 40 30E	60.4255555555556	150.675	6026'N	15041'E	Au-Ag epithermal vein	Ag, Au, Hg		Small.  Typical ore contains up to 5.8 g/t Au and 680 g/t Ag.  	Eastern Asia-Arctic: Okhotsk	Eremin, 1974	A set of discontinuous adularia-quartz veins and veinlets, with associated alteration zones, occur in a subvolcanic body of Late Cretaceous fluidal rhyolite and associated breccia.  Subvolcanic intrusion is controlled by a northeast fault of the Arman volcanic collapse structure.  Veins are grouped in three zones, which tend to converge at the root of a lopolith-like body.  Dominant ore minerals are:  pyrargyrite and stephanite; freibergite, polybasite, miargyrite, native silver, electrum, pyrite, and sulfides of copper, lead, and zinc are minor or rare.  Au:Ag ratio is 1:100 or less.  There is a distinct vertical metasomatic zoning.  Gold-silver ore bodies occur in a quartz-adularia-hydromica zone about 300 m thick; beneath it is a zone of andesite marked by low-temperature propylitization; above the ore zone is a sharp change to quartz-kaolinite and quartz-kaolinite-alunite alternation, with quartz containing disseminated stibnite and cinnabar.  Deposit is barely eroded and formed near the surface; as indicated by the wide occurrence of ultrafelsic metasomatism and the preservation of a layer of subaerial ignimbrite.	Russia

P56-55	Karamken	P	56	55	60 14 24N	150 59 58E	60.24	150.999444444444	6014'N	15060'E	Au-Ag epithermal vein	Au, Ag		Medium.  Discovered in 1964.  Being mined.  Produced 40 tonnes Au from 1978 to 1992.  Average grade of 100 to 129 g/t Au in 1978 and 16-18 g/t Au in 1992.	Eastern Asia-Arctic: Okhotsk	Krasilnikov and others, 1971; Nekrasova, 1972; Goldfrid, Demin, and Krasilnikov, 1974; Nekrasova and Demin, 1977; Sidorov, 1978; P.Layer, V.Ivanov, and T.Bundtzen, 1994, written commun.	Deposit consists of numerous adularia-quartz and adularia-carbonate-quartz veins more than 200 m long and more than 0.2 m thick.  Veins are controlled by arcuate and linear faults which define and crosscut a caldera filled with Upper Cretaceous dacite, andesite-basalt, and rhyolite.  Main deposit, which contains about 80-90% of the reserves, is confined to few major veins that are spatially related to a hypabyssal body cut by circular faults and composed of andesite, andesitic dacite, volcanic breccia of andesite-dacite composition, and rhyolite.  Most productive veins are associated with an altered zone comprised of adularia-hydromica and quartz; and explosion and hydrothermal breccia bodies.  A zone of kaolinite, alunite, and quartz alteration occurs in higher parts of the ore deposit.  Ore minerals are pyrite, sphalerite, chalcopyrite, canfieldite, freibergite, tennantite, naumannite (Ag2Se), polybasite, electrum, kstelite, native silver, and other less common sulfides, selenides, sulfostannates, and sulfosalts of silver.  Au:Ag ratio is 1:3 to 1:4 in the richest portions of Glavnaya vein.  Veins form in clusters, which converge at depth.  Gold-canfieldite-freibergite-chalcopyrite and gold-pyrite-sphalerite zones are the most productive; at depth they are succeeded by a galena-canfieldite zone with tin-silver minerals.  Ar-Ar age isotopic study of adularia in Au-Ag vein yields an age of 79 Ma.  	Russia

P56-56	Julietta	P	56	56	61 10 00N	153 59 00E	61.1666666666667	153.983333333333	6110'N	15359'E	Au-Ag epithermal vein	Au, Ag		Medium. Average grade of 29 g/t Au, 325 g/t Ag. Proven reserves of 18 t Au, 200 t Ag. Estimated resources of 40 t Au and about 1,000 t Ag.	Eastern Asia-Arctic: Okhotsk	S.F. Struzhkov, O.B. Ryzhov, and V.V. Aristov, written commun., 1994.	Deposit consists of Au-Ag sulfide-carbonate-quartz veins located inside a large Late Cretaceous caldera. Volcanic rocks in caldera and associated subvolcanic intrusive rocks comprised of andesite, andesite-basalt, and andesite-dacite. Veins dip steeply and vary from 200 to 500 m length and from 1 to 4 m wide. Major ore minerals are native gold and silver, freibergite, polybasite, galena, sphalerite, chalcopyrite, hessite, acantite, cubanite, pyrrhotite, and naumannite. Associated minerals in adjacent metasomatically-altered volcanic rocks are ankerite, calcite, chlorite, epidote, and hydromica. Ore minerals formed in two stages, an older gold-polymetallic stage, and a younger gold-silver-sulphosalt stage.	Russia

P57-01	Grisha	P	57	01	63 47 36N	159 27 47E	63.7933333333333	159.463055555556	6348'N	15928'E	Au-Ag epithermal vein	Au, Ag		Small.  	Kedon	Korobeinikov, oral commun., 1991	Rare, thin veins and zones of quartz veinlets that extend for several tens or hundreds of meters and range up to several meters thick.  Disseminated native gold, galena, sphalerite, chalcopyrite, and high molybdenum values are present.  Au:Ag ratio is 1:2 to 1:3.  Ore bodies are confined to a zone just inside the northern contact of the Early Paleozoic Anmandykan pluton.  The pluton is composed of alkalic syenite and nordmarkite, and lies along a northeast trending fault zone.  Early Paleozoic and Late Mesozoic stages of mineralization have been identified; the latter involves the remobilization of the earlier.	Russia

P57-02	Sedoi	P	57	02	63 49 01N	158 25 02E	63.8169444444444	158.417222222222	6349'N	15825'E	Ag-Co arsenide vein and Fe-Pb-Cu-Ag-Au skarn  	Ag, Co		Small.  Veins contain up to 8 g/t Au and 196 g/t Ag.  	Eastern Asia-Arctic: Korkodon-Nayakhan	Savva and Vedernikov, 1989	Polysulfide-carbonate veins occur in conformable and cross-cutting bodies of garnet-epidote-sulfide and pyrrhotite-garnet skarn hosted in Ordovician limestone and dolomite.  Some limestone layers replaced by hematite.  Wall rocks are intruded by Late Devonian biotite granite and subsequently by hypabyssal rhyolite emplaced along the granite-limestone contact, locally forming sheets.  Skarn mineralization is marked by tellurides of silver, lead, and bismuth, with rare inclusions of native gold.  Fracture veins related to volcanogenic mineralization are composed of calcite, manganocalcite, galena, sphalerite, and fine-grained intergrowths of proustite, stephanite, pyrargyrite, sternbergite, argentopyrite, and silver-bearing lellingite, glaucodot, and arsenopyrite.  Karst development is widespread, often associated with areas notable for crustification banding that contains native silver.	Russia

P57-03	Kubaka	P	57	03	63 43 45N	160 01 20E	63.7291666666667	160.022222222222	6344'N	16001'E	Au-Ag epithermal vein	Au, Ag		Medium. Proven reserves about 100 tonnes Au.  Average about 17 g/t Au and 15.7 g/t Ag.  	Kedon	Yarantseva and Boldyrev, 1988; Savva and Vortsepnev, 1990; Stepanov and others, 1991; Banin, 1993, (oral commun.); I.N. Kotlar, 1986, (written commun.); V.V. Ivanov and P.W. Layer, 1994, (written commun.)	Veins and zones of adularia-quartz and adularia-chalcedony-hydromica-quartz veinlets containing fluorite, barite, and carbonate, occur in a northwest-trending elongate caldera 4 km in diameter.  The caldera lies transverse to the northeast trend of the main regional structural elements.  The caldera is rimmed by Middle to Upper Devonian volcanic rocks and volcanogenic sediments and is filled with Upper Devonian to Lower Carboniferous volcanic rocks.  Gold-bearing veins occur within the caldera, localized in subvolcanic trachydacite in a stratified volcaniclastic sequence of Middle to Upper Devonian ignimbrite, pumiceous rhyolite to dacite, trachyandesite and rhyolite-dacite sills, and tephra and agglomerate tuff of various compositions.  Deposits die out in the overlying Lower Carboniferous carbonaceous shale and siltstone.  The most intensely mineralized veins trend about east-west and west-northwest.  Cretaceous rhyolite and alkalic basalt dikes occur within and beyond the mineralized tectonic block.  Basalt dikes cross the mineralized veins and are themselves cut by later, gold-poor quartz-carbonate veins and veinlets.  Host rocks are intensely silicified, adularized, and sericitized; with the development of much hydromica.  Initial stage of mineralization is marked by a gold-chalcedony association with colloidal gold (+electrum and kstelite).  Later adularia-quartz stage involves coarser, recrystallized native gold and scattered, disseminated pyrite, arsenopyrite, galena, freibergite, acanthite, aguilarite, naumannite, argentopyrite, and sulfides of gold and silver in fine-grained aggregates.  Native gold predominates markedly over sulfide-bound gold.  Au:Ag ratio is 1:1 to 1:2.  Rb-Sr isochron ages of stratified volcanic rocks and subvolcanic caldera rocks are 332-344 Ma.  Post-ore alkalic basalt dikes yielded 124-155 Ma ages by K-Ar.  Ar-Ar ages on adularia from ore veins range from 110 to 175 Ma, with plateau ages ranging from 110-130 Ma.  Most geologists consider the age of mineralization to be Late Devonian-Early Carboniferous because fragments of gold-bearing calcedonic quartz are found in the adjacent conglomerates which contain Lower-Middle Carboniferous  fossils.  

	Russia

P57-04	Yolochka	P	57	04	63 32 57N	159 38 18E	63.5491666666667	159.638333333333	6333'N	15938'E	Au-Ag epithermal vein	Au, Ag		Small.  	Kedon	Rozenblyum, oral commun., 1991	Zone of veinlets and veins of quartz and carbonate-quartz composition that visually appear unmineralized, are accompanied by haloes of altered aplite-like rock.  Ore bodies are up to 16 m thick, but the gold values are erratic.  Au:Ag ratio is 1:1 to 1:3.  Deposit occurs in Devonian volcanic rocks that form a volcanic dome in the Omolon massif.  Archean schist underlies the volcanic rocks in the western part of the district.  A large, linear body of Devonian diorite porphyry occurs along an east-west fault.  Hypabyssal porphyritic dacite and dacitic brecciated flows are exposed in the middle of the dome.  Deposit is related to the hypabyssal dacite.	Russia

P57-05	Vechernee	P	57	05	63 28 54N	158 49 42E	63.4816666666667	158.828333333333	6329'N	15850'E	Porphyry Mo-Cu   	Mo, Cu		Large.  Averages 0.2% Mo, 0.2% Cu, 0.1 to 0.6 g/t Au, 2 to 10 g/t Ag.  	Kedon	Rozenblyum, oral commun., 1991	Molybdenite-chalcopyrite quartz stockwork zone of altered pyritized, and silicified rocks with illite, occurs in mid-Paleozoic subalkalic granite that forms the core of an intrusive dome in Archean and Upper Proterozoic rocks.  Richest ore bodies are confined to zones along the contacts of the granite; both within and adjacent to the pluton.  Minor tungsten.	Russia

P57-06	Skarn	P	57	06	63 28 41N	158 32 14E	63.4780555555556	158.537222222222	6329'N	15832'E	Fe (Au, Cu, W, Sn) skarn   	Fe	W, Au, Ag	Medium.  Estimated 130 million tonnes containing 56% Fe, 2.96% MnO, 0.16% TiO2, and minor Au and Ag.  	Eastern Asia-Arctic: Korkodon-Nayakhan	Fadeev, 1975	Garnet, garnet-pyroxene, and pyroxene-clinohumite skarns contain numerous steeply-dipping, magnetite ore bodies about 300-800 m by 10-100 m in size.  Massive ores are common and the ore bodies are controlled by faults.  Skarn and associated deposits form a zone up to 150 m wide and about 2.2 km long around a Lower Paleozoic quartz monzonite intrusion.  Skarns are succeeded by tremolite-wollastonite marble farther from the intrusion.  District is mainly composed of a Riphean carbonate terrain that includes Archean migmatite with small jaspilite bodies.  Magnetite skarns characteristically contain tungsten in scheelite, and gold and silver values.	Russia

P57-07	Khetagchan	P	57	07	63 24 13N	157 03 37E	63.4036111111111	157.060277777778	6324'N	15704'E	Granitoid-related Au   	Au, W, Bi		Small.  Up to 20 g/t Au and up to 50-60 g/t Ag.  	Eastern Asia-Arctic: Korkodon-Nayakhan	A.A. Sidorov, written commun., 1990	Zones of sulfide-quartz and sulfide-chlorite-quartz veins and veinlets up to 150 m long and 10-15 m thick occur along the contacts of an Upper Cretaceous granodiorite body; both within and adjacent to the intrusion.  Ore minerals are galena, sphalerite, chalcopyrite, wolframite, pyrite, arsenopyrite, bismuthinite, native bismuth, gold, electrum, tetrahedrite-tennantite, silver sulfosalts, and argentite.	Russia

P57-08	Kegali	P	57	08	63 22 41N	161 42 08E	63.3780555555556	161.702222222222	6323'N	16142'E	Au-Ag epithermal vein	Au, Ag		Medium.  Considerable potential.  	Eastern Asia-Arctic: Okhotsk	Peskov, written commun., 1975; P.Layer, V.Ivanov, and T.Bundtzen, written commun., 1994.	Thick and extensive quartz, adularia-quartz, and carbonate-adularia-quartz veins and zones of veinlets in an area 2 km or more long contain disseminated pyrite, chalcopyrite, argentite, polybasite, stromeyerite, galena, sphalerite, native gold, and native silver.  Veins occur in a large Lower to Upper Cretaceous, hypabyssal dacite body and in volcanic flows of intermediate to basic composition.  Veins are accompanied by the haloes of illite-quartz alteration.  Orientation of the ore bodies is related to sets of arcuate faults between an extrusive dome and an area of local volcanic subsidence.  Au/Ag ratio is 1:3 to 1:10.  Ar-Ar isotiopic studies yield an age of 79.0 Ma for the Au-Ag veins.  	Russia

P57-09	Verkhny-Omolon	P	57	09	63 21 02N	158 22 01E	63.3505555555556	158.366944444444	6321'N	15822'E	Ironstone	Fe		Large.  Estimated to contain 960 million tonnes grading 33 to 51% Fe (average grade 40.5% Fe) and up to 0.3 g/t Au.  	Omolon	Gelman, Titov, and Fadeev, 1974; Fadeev, 1975; Zhulanova, 1990; Milov, 1991.	Sheet-like and podiform bodies of banded iron formation occur in Archean migmatite, amphibole and biotite-amphibole plagiogneiss, amphibolite, and mafic schist.  Banded iron ore is composed of magnetite (45-65%), and quartz (35-55%) intergrown, with apatite and actinolite.  Sulfur is absent.  Ores are variously medium to coarse grained, massive, or banded.  Main deposit extends for 3.5 km and averages 250 m thick in the thickest, central portion.  It locally includes alternating, nearly conformable ore bodies and mineralized horizons of the country rock. The original quartzite and possibly the ironstone deposits may be derived from marine sedimentary rocks that originally contained ironstone (Superior Fe) deposits. The host rocks are extensively granitized. Rb-Sr isotopic data reveal multiple metamorphisms of the Archean basement. Granulite facies metamorphism occurred at 3.4 to 3.8 Ga; regional granitization occurred approximately at 2.0 Ga; and low grade metamorphism and deformation occurred approximately at 1.0 Ga (Zhulanova, 1990; Milov, 1991).	Russia

P57-10	Verkhny-Koargychan	P	57	10	63 07 02N	159 18 58E	63.1172222222222	159.316111111111	6307'N	15919'E	Au-Ag Polymetallic vein	Au, Ag, Pb, Zn		Small.  Samples contain up to 84.9 g/t Au, 538 g/t Ag, 15.8% Pb, 19% Zn, and 0.7% Cu.  	Eastern Asia-Arctic: Korkodon-Nayakhan	Vasetsky and Dorogoy, written commun., 1978	Quartz-sulfide and quartz-carbonate-sulfide veins and sulfidized fractured zones contain massive galena, sphalerite, and pyrite, with Au and Ag.  Host rock is Upper Permian limestone, and less commonly, siltstone.  Ore zones strike predominantly about north-south and extend for several tens or sometimes several hundred of meters.	Russia

P57-11	Druchak	P	57	11	62 59 39N	160 02 36E	62.9941666666667	160.043333333333	6260'N	16003'E	Au-Ag epithermal vein	Ag, Au	Pb, Zn	Small.  Samples contain 0.1 to 5.8 g/t Au, 112 to 3613 g/t Ag, and up to 1% Pb, Zn, Mo.  	Eastern Asia-Arctic: Okhotsk	Lyaschenko and others, written commun., 1990	Steeply-dipping quartz, adularia-quartz, carbonate-quartz, and sulfide-carbonate veins, from 20 to 350 m long, grade along strike into zones of sulfide-carbonate-quartz veinlets.  Ore bodies occur in Upper Cretaceous extrusive rocks and strike northwest and north-northeast.  Ore minerals are argentite, pyrargyrite, polybasite, pyrostilpnite, owyheeite, electrum, galena, sphalerite, chalcopyrite, tetrahedrite-tennantite, and arsenopyrite.  	Russia

P57-12	Irbychan	P	57	12	62 41 13N	159 55 29E	62.6869444444444	159.924722222222	6241'N	15955'E	Au-Ag epithermal vein	Au, Ag		Small.  Up to 12 g/t Au and 220 g/t Ag.  	Eastern Asia-Arctic: Okhotsk	Zhivotnev and Litovchenko, 1977; V.V. Ivanov and P.W.Layer, written commun.,1994.	Gently dipping veins, lenses, and zones of veins formed in three stages:  (1) an adularia-quartz stage with gold and silver values, marked by pyrite, argentite, pyrargyrite, sternbergite, and gold, (Au:Ag = 1:10);  (2) a quartz stage carrying high silver values marked by pyrite, argentite, and native silver (Au/Ag = 1:300-1:500), and  (3) a carbonate-quartz silver-polymetallic stage with pyrite, galena, sphalerite, and chalcopyrite.  Main ore bodies occur in a hypabyssal rhyolite body along approximately east-west-trending faults.  Ore bodies are several hundreds meters long.  Deposit is in the margin of a circular structure dominated by Upper Cretaceous ignimbrite and subject to resurgent doming.  Underlying rocks are Devonian volcanic rocks, and carbonates and clastic rocks of Permian, Triassic and Upper Jurassic age.  Adularia from ore veins yeilded an Ar-Ar age of 82.8 Ma.  	Russia

P57-13	Orlinoe	P	57	13	62 35 02N	157 16 22E	62.5838888888889	157.272777777778	6235'N	15716'E	Porphyry Mo   	Mo	W	Small.  Mo averages 0.01 to 0.03% but ranges up to 8.5%.	Eastern Asia-Arctic: Korkodon-Nayakhan	Okhotkin, written commun., 1957	Steeply-dipping stockwork extending for tens of meters.  It is composed of thin quartz veins and veinlets with disseminated and masses of molybdenite.  Subordinate minerals are pyrite, chalcopyrite, wolframite, powellite, muscovite, fluorite, calcite, chlorite, and garnet.  Molybdenum mineralization occurs in contact-metamorphosed Upper Triassic sedimentary rocks and in intruding Late Cretaceous granite.	Russia

P57-14	Evenskoe	P	57	14	62 32 24N	159 45 06E	62.54	159.751666666667	6232'N	15945'E	Au-Ag epithermal vein	Au, Ag	Te, Bi	Medium.  Reserves of 2.5 million tonnes grading 10 g/t Au, 250 g/t Ag. Considerable potential.	Eastern Asia-Arctic: Okhotsk	Kostyrko, Plyashkevich, and Boldyrev, 1974; Kostyrko, 1977; Kostyrko and Romanenko, 1978, 1980; Sidorov, 1978; P.Layer, V.Ivanov, and T.Bundtzen, written commun.,1994.	Complicated veins, altered zones with veinlets, and linear explosion-hydrothermal breccias.  They occur in ignimbrite and andesite flows; and in sheets, fissured bodies, and extrusive domes of Late Cretaceous rhyolite, trachyrhyolite, rhyodacite, and dacite.  Hydrothermal alteration ranges from low- and middle-temperature propylitization to highly-altered quartz-adularia-illite metasomatite.  Mineralized zones are several hundred meters to 4 km long, and 5-10 m thick.  Several mineral associations are recognized:  (1) a gold-sulfide polymetallic association with gold and silver tellurides in epidote-quartz and quartz veins;  (2) a gold-argentite association with selenides and locally stibnite in adularia-carbonate-quartz and quartz veins;  (3) a gold-sulfide-sulfoantimonide association with selenides and pyrite in veins of the same composition as the previous association; and  (4) a gold-sulfide-sulfoantimonide association in quartz and barite-quartz veins.  Main ore minerals are gold, electrum, kstelite, native silver, argentite, polybasite-pearceite, proustite, pyrargyrite, stromeyerite, tetrahedrite-tennantite, naumannite, aguilarite, and hessite; native bismuth, iron, zinc, and copper; several polymetallic minerals are also known.  Au:Ag ratio is generally about 1:20-1:30.  More than ten independent ore zones occur in a circular hypabyssal complex along the northwest fault that bounds the Turomcha volcanic structure, which extends for 50 km and is approximately 7 km wide.  Ar-Ar isotopic studies of adularia from vein yields an age of 78.0 Ma.  	Russia

P57-15	Olyndja	P	57	15	62 26 05N	157 34 34E	62.4347222222222	157.576111111111	6226'N	15735'E	Au-Ag epithermal vein	Ag, Au		Small.  Ranges up to 4 g/t Au and 3 to 1079 g/t Ag.  	Eastern Asia-Arctic: Okhotsk	Kuzyukov, written commun., 1977	Sets of closely spaced, approximately north-south, quartz, quartz-carbonate, and adularia-quartz veins and veinlets occur over a zone about 1 km long in silicified, kaolinized, and sulfidized Upper Cretaceous volcanic rocks.  Main ore minerals are silver sulfosalts, argentite, xanthoconite, and native silver.  Pyrite, chalcopyrite, and galena are minor.  Zone occurs at the south side of a volcanotectonic depression formed at the intersection of northwest and nearly east-west faults.	Russia

P57-16	Aldigych	P	57	16	62 19 29N	159 58 04E	62.3247222222222	159.967777777778	6219'N	15958'E	Au-Ag epithermal vein	Au, Ag		Small.  Up to 14.5 g/t Au and 98 g/t Ag.  	Eastern Asia-Arctic: Okhotsk	Kostyrko, Plyashkevich and, Boldyrev, 1974	Stockwork zones 200 to 300 m long, include short en echelon and subparallel, quartz and barite-quartz veins and veinlets containing electrum, galena, sphalerite, chalcopyrite, silver-bearing tetrahedrite, sulfosalts of silver, and stibnite.  Upper Cretaceous porphyritic ignimbrite wall rock is locally altered to quartz-kaolinite and siliceous metasomatite.  Some veins are confined to propylitized andesite and hypabyssal gabbro-diorite porphyry.	Russia

P57-17	Nevenrekan	P	57	17	62 13 45N	159 11 19E	62.2291666666667	159.188611111111	6214'N	15911'E	Au-Ag epithermal vein	Au, Ag		Small.  Ore ranges 0.5 to 23 g/t Au and 22 to 746 g/t Ag.  	Eastern Asia-Arctic: Okhotsk	Politov, written commun., 1981	Steeply-dipping quartz, adularia-quartz, carbonate-quartz, and sulfide-quartz veins and zones of veinlets up to several hundreds of meters long occur in weakly altered Upper Cretaceous ignimbrite, felsite, rhyolite, and subordinate andesite.  Ore minerals are argentite, pyrargyrite, native gold, native silver, pyrite, arsenopyrite, chalcopyrite, coarse-grained disseminated galena, sphalerite, magnetite, and supergene copper minerals.  Minor gangue minerals include chlorite, tourmaline, kaolinite, and amphibole.  Deposits are localized at the intersection of a deep, northwest to approximately north-south-trending fault, and a system of northeast to nearly east-west fractures.	Russia

P57-18	Tikas	P	57	18	61 39 50N	161 20 30E	61.6638888888889	161.341666666667	6140'N	16121'E	Porphyry Mo   	Mo		Small.  Veinlets and sulfidized rocks contain 1-5 g/t Ag	Eastern Asia-Arctic: Koni-Yablon	Ivanov, Leonenko, and Livshits, written commun., 1966	Irregularly disseminated molybdenite, pyrite, arsenopyrite, and galena occur in quartz and feldspar-quartz veins and veinlets in silicified, sericitized, and sulfidized sedimentary rocks near the contact of an Early Cretaceous granodiorite which is cut by thin aplite dikes.  Disseminated sulfide minerals also occur in the granodiorite.  Weakly contact-metamorphosed Middle Jurassic sandstone and shale host the pluton and are also cut by sheets of gabbro and granite porphyry.  Veinlets and sulfidized rocks contain 1-5 g/t silver.	Russia

P57-19	Spiridonych, Teply	P	57	19	61 20 19N	156 16 33E	61.3386111111111	156.275833333333	6120'N	15617'E	Au-Ag epithermal vein	Au, Ag		Medium  Samples contain from 0.7 to 16.9 g/t Au, 348.3 to 1630 g/t Au, and >1% Pb, Zn, Cu, Mn.  	Eastern Asia-Arctic: Okhotsk	Kopytin, written commun., 1987; Konstantinov, 1989	Bands of closely-spaced subparallel, mineralized fracture zones with veins and veinlets of quartz, epidote-chlorite-quartz, quartz-chlorite-sulfide, quartz-pyrolusite-rhodonite, and quartz-carbonate composition.  Ore minerals are argentite, stromeyerite, native silver, electrum, pyrargyrite, galena, sphalerite, chalcopyrite, and bornite.  Host rocks are Upper Cretaceous ignimbrite and andesite.  Ore occurs in the centers of volcanic depressions and is spatially related to stocks and dikes of diorite, granodiorite, granite, andesite-bassalt and andesite.  Northwest-striking veins predominate.  Altered wall rock containing quartz, adularia, and illite reflects widespread mid- and low-temperature propylitization.	Russia

P58-01	Sergeev	P	58	01	63 52 00N	165 41 00E	63.8666666666667	165.683333333333	6352'N	16541'E	Au-Ag epithermal vein	Au, Ag		Medium.  Ranges up to 1387 g/t Au, up to 8200 g/t Ag.	Eastern Asia-Arctic: Koni-Yablon	Vasilenko, Rozhkov, and Shepitsyn, 1977;  V.P. Khvorostov, written commun., 1978.	Steeply-dipping quartz, adularia-quartz, and carbonate-quartz veins, altered rocks, and mineralized fracture zones occur in an area of approximately 15 km2 on the tops and limbs of an intrusive dome composed of Upper Cretaceous andesite-basalt and basalt flows that have been intruded by a central laccolith-like body composed of granodiorite and quartz monzonite porphyry cut by numerous dikes and stocks of intermediate to felsic composition.  En-echelon, linear and arcuate ore bodies are controlled by the intersection of a major northeast fault, a set of radial and concentric fractures, and the contacts of the hypabyssal plutons.  Domal structure coincides with an aureole of intense epidote-chlorite propylitization, local areas of actinolite-epidote propylitization, and illite-quartz alteration near the veins.  Mineral assemblages consist of:  (1) an early, high-temperature garnet-epidote-quartz assemblage with hematite;   (2) a productive adularia-quartz assemblage with pyrargyrite, acanthite, electrum, native silver, canfieldite, galena, sphalerite, chalcopyrite, bornite, pyrite, and magnetite; and   (3) a later pyrite-quartz and prehnite-zeolite-carbonate assemblage.  Deposits are characterized by increase in sulfides as mineralization progressed, and by the presence of tellurides.  In upper horizons selenium dominates over tellurium; in the lower horizons the reverse.  Alteration consists of propylitization, with local adularization, argillization, and silicification.  Deposit classified as a gold-silver association, gold-selenide-tellride mineral type.  	Russia

P58-02	Tsirkovy	P	58	02	63 32 44N	165 06 57E	63.5455555555556	165.115833333333	6333'N	16507'E	Granitoid-related Au	Au, Ag, Cu, W, Bi		Small.  	Eastern Asia-Arctic: Koni-Yablon	V.P. Vasilenko, written commun., 1973	Gold-silver-polymetallic veins are associated with Late Cretaceous intrusions of granodiorite porphyry, syenite-diorite, and diorite.  Deposit has affinities with copper-molybdenum porphyry deposits.	Russia

P58-03	Talov	P	58	03	61 49 28N	165 48 38E	61.8244444444444	165.810555555556	6149'N	16549'E	Podiform Cr	Cr		Small.  	Kuyul	Mikhailov, 1961	Podiform and disseminated chromite occurs in serpentinite veins in serpentinized peridotite.  Large boulders and pebbles of massive chromite are scattered in residual and alluvial deposits derived from the peridotite.	Russia

P58-04	Tikhorechen	P	58	04	61 37 19N	164 49 35E	61.6219444444444	164.826388888889	6137'N	16450'E	Podiform Cr	Cr	PGE, Ni	Small.  Ranges 34% to 52% Cr2O3.  	Kuyul	Pokhialainen, written commun., 1965; Gryaznov, 1970	A band of rock debris in a serpentinite melange zone contains massive and finely disseminated chromite.  Melange is 1.5-2 km wide and about 7 km long.  Peridotite outcrops occur in residual deposits and contain chromite masses and lenses up to 5 m wide and 25-30 m long.  Platinum and nickel are present.	Russia

P58-05	Ametistovoe	P	58	05	61 18 39N	164 49 04E	61.3108333333333	164.817777777778	6119'N	16449'E	Au-Ag epithermal vein	Au, Ag		Medium.  Proven reserves 96 tonnes Au.  Average grade 16 g/t Au.  Considerable potential and prospecting.  	Central Koryak	Khvorostov, 1983; V.P. Khvorostov, written commun., 1986; Benevolskyi and others, 1992 	Deposit contains two types of ore bodies: (1) ore pipes with small subparallel veins and veinlets, and (2) steeply dipping veins and zones. The veins are hundreds of meters long and several meters thick; the zones are several tens of meters thick. The veins are composed of quartz, kaolinite-quartz, and sulfide-quartz types. Main ore minerals are gold, argentite, and kstelite. Subordinate minerals are stephanite, stibiopearceite, aguilarite, pyrargyrite, miargyrite, freibergite, naumannite, and native silver. Pyrite, galena, sphalerite, and chalcopyrite are widespread and comprise up to 20 to 30 percent of some veins. Gangue minerals are quartz, kaolinite, adularia, and chlorite. Au:Ag ratio averages 1:3. The richest ore bodies are confined to altered rocks that contain a alteration of kaolinite, illite, and quartz superimposed on widespread epidote-chlorite-carbonate propylitic alteration. Deposit is centered on a magmatic structure that is about 5 to 6 km deep. Host volcanic rocks are Eocene and Oligocene flows with K-Ar ages of 18-24 Ma that consist mainly of andesite, andesite-basalt, andesite-dacite, and dacite. Associated are local abundant extrusive-vent and hypabyssal rocks of similar compositions. Deposit is controlled by: (1) a northwest- and nearly north-south-trending faults; (2) radial and concentric fractures; and (3) extrusive and hypabyssal bodies. 	Russia

P58-06	Sprut	P	58	06	61 20 52N	165 06 46E	61.3477777777778	165.112777777778	6121'N	16507'E	Au-Ag epithermal vein	Ag, Au		Small.  	Central Koryak	Khvorostov and others, written commun., 1982	Veins and zones of veinlets are confined to a system of subparallel fractures trending northwest.  Veins are of kaolinite-adularia-quartz composition and contain proustite, pyrargyrite, electrum, native silver, polybasite, freibergite, and mercury-bearing tetrahedrite.  Au:Ag ratio is 1:500.  Host rocks are Paleogene andesite-dacite and dacite porphyry related to extrusive vents and volcanic domes.	Russia

P58-07	Unnei	P	58	07	61 31 25N	166 06 42E	61.5236111111111	166.111666666667	6131'N	16607'E	Sn polymetallic vein   	Sn, Ag, Au		Small.  	Central Koryak	Rozhkov, 1969	Quartz-chlorite and quartz-sulfide veins trend about north-south and northwest.  They occur in zones of silicification, chloritization, and kaolinization in intricately deformed Upper Cretaceous sandstone, siltstone, and argillite.  Veins contain disseminated cassiterite, stannite, pyrite, arsenopyrite, sphalerite, stibnite, proustite, pyrargyrite, and small amounts of gold.  Sedimentary rocks are intruded by Paleogene granite porphyry stocks and dikes.	Russia

P58-08	Ivolga	P	58	08	61 16 17N	165 20 40E	61.2713888888889	165.344444444444	6116'N	16521'E	Epithermal vein   	Ag, Sn	As, Sb	Small.  	Central Koryak	Rozhkov, 1969; Khvorostov and others, written commun., 1982	Consisits of quartz veins and sets of parallel veinlets that generally trend north-south and contain arsenopyrite, pyrite, marcasite, proustite, pyrargyrite, miargyrite, famatinite, argentite, stannite, and stibnite. Veins and veinlets occur in fracture zones, zones of silicification, pyritization, and kaolinization of Paleogene felsic extrusive rocks and Upper Cretaceous marine clastic rocks.  Au:Ag ratio is 1:1000 or less.  Deposits are associated with a small granite porphyry stock which forms an elongate band trending north-northeast.	Russia

P58-09	Khrustal (Khrustalnoe)	P	58	09	61 27 43N	167 10 28E	61.4619444444444	167.174444444444	6128'N	16710'E	Sn polymetallic vein   	Sn		Small.  Average grade of 0.7%Sn.	Central Koryak	Lugov, 1986.	Occurs in fracture zones up to 400 m long and 1.5 to 5 m thick in a contact-metamorphic zone subsequently altered to combinations of quartz, carbonate, sericite, chlorite, sulfide, and tourmaline. Major ore assemblage is cassiterite-quartz-chlorite. Deposit similar to Ainavetkinsky deposit, except that in the Khrustalnoe deposit, the central silicified vein zone is less distinct.  Limonitie alteration is very common.  Deposit hosted in Late Cretaceous stratified clastic rocks that occur in northeast-trending, complex folds and are cut by numerous faults. Stratified rocks are intruded by a small stock and dikes of diorite porphyry and granodiorite porphyry.  K-Ar isotoic studies indicate an age of 30-27 Ma for the granodiorite porphyry and diorite.	Russia

P58-10	Reznikov	P	58	10	60 50 12N	164 39 11E	60.8366666666667	164.653055555556	6050'N	16439'E	Sn polymetallic vein   	Sn, Ag, Au		Small to medium.  	Central Koryak	Lugov and others, 1974a, b	Tin-bearing quartz, and chlorite-quartz veins and mineralized fracture zones extend for hundreds of meters and contain cassiterite, stannite, and sulfides of iron, copper, zinc, silver, and lead.  Paleogene felsic dikes and intrusions along fractures trend northwest, forming a ladder system that trends northeast.  Tin-bearing bodies often occur along the contacts of diorite porphyry and granite porphyry dikes with Upper Cretaceous clastic sedimentary rocks.  Ore bodies are similar to the Ainavetkin ore district in composition and structure.	Russia

P58-11	Ainatvetkin	P	58	11	60 58 25N	165 16 50E	60.9736111111111	165.280555555556	6058'N	16517'E	Sn polymetallic vein   	Sn, Ag		Medium.   Average grade of 0.6 %Sn.	Central Koryak	Lugov and others, 1974; Lugov and others, 1979b; Lugov, 1986.	Consists of sulfide-chlorite-quartz veins and fracture zones with cassiterite that are a few hundred m long and range from 1.0 to 6.0 m thick. Ore minerals are cassiterite, magnetite, pyrrhotite, chalcopyrite, galena, sphalerite, arsenopyrite, wolframite, scheelite, pyrite, stannite, canfieldite, pyrargyrite, gold, and native copper.  Cassiterite-chlorite-quartz assemblage, containing up to 10% sulfides, predominates. Breccia zones with fragments of metasomatic rocks and quartz-chlorite cement with sulfides contain highest Sn content. Deposit hosted in complexly-folded Upper Cretaceous (Santonian-Campanian) sandstone and shale that is overlain by Late Eocene-Oligocene rhyolite, rhyodacite, rhyodacite tuff, and ignimbrite.  Late Cretaceous clastic rocks are cut by numerous stocks, dikes, and hypabyssal granitoids of Late Paleogene age. Biotite-quartz, cordierite, and quartz-biotite-cordierite hornfels zones occur at the contacts. Hornfels subsequently altered to quartz, chlorite, and sericite.  	Russia

P58-12	Olyutor	P	58	12	60 34 31N	167 48 50E	60.5752777777778	167.813888888889	6035'N	16749'E	Clastic sediment-hosted Hg or hot-spring Hg?	Hg, Sb, As		Medium.  Average grade of 1.4% Hg, and ranging up to 0.4% Sb and 4 g/t Au.  Estimated 700 tonnes Hg.	Olyutor	Babkin, 1975;  Vlasov, 1977	Occurs in steeply-dipping fracture zones, which radiate from a large, northeast trending fault.  Host volcaniclastic rocks are of Paleogene and Neogene age and are deformed into small linear folds.  Ore bodies strike for tens of meters to 600 m.  Veins have numerous apophyses in the form of typical mineralized breccias, which often grade into zones of veinlets.  Most productive ores occur in tuff.  Quartz and kaolinite, and less commonly dolomite, are the main gangue minerals.  Main ore mineral is cinnabar accompanied by stibnite and sometimes realgar, cementing quartz and quartz-kaolinite breccia fragments.  Wall rock alteration includes weak silicification, kaolinization, and carbonatization.	Russia

P58-13	Maletoivayam	P	58	13	60 26 18N	164 22 56E	60.4383333333333	164.382222222222	6026'N	16423'E	Sulfur-sulfide	S		Large.  Contains up to 30% S.  	Olyutor	Vlasov, 1977.	Consists of  lower and upper occurrences that are separated by a 10 to 50 m thick bed of kaolinite-montmorillonite and quartz-kaolinite rock.  Both occurrences are inclined 5 to 10 with respect to bedding in host rock. Upper ore body occurs for 1,800 m along strike, ranges from 80 to 700 m wide, and is 3 to 115 m thick.  Deposit consists of sulfide-sulfur-alunite silicified rock and sulfuric silicified rock. Latter contains major native sulfur tonnage. Sulfide-sulfur-alunite silicified rock contains 18% S, 30-40% alunite, and 10% Fe sulfides.  Ore zone contains up to 30% native sulfur.  Native sulfur of 96-99% purity is separated by thermal reduction.  About 60% potassium sulfate is also separated. Deposit occurs at the southern end of the Olyutorka volcanic belt in the Miocene Korfovsky Formation. 	Russia

P59-01	Orlovka	P	59	01	64 00 17N	168 34 04E	64.0047222222222	168.567777777778	6400'N	16834'E	Epithermal vein   	Au, Zn, Cu, Hg		Small.  	Central Koryak	Rozenblyum, oral commun., 1991	Linear zones of quartz and quartz-carbonate veins and veinlets up to 1 m thick and 100-150 m long contain native gold, pyrite, magnetite, pyrrhotite, sphalerite, chalcopyrite, arsenopyrite, and cinnabar.  Zones occur in areas quartz-sericite and propylitic rock.  Deposits occur in the middle of a volcanic dome consisting of Cenozoic andesite and andesite-basalt.  High gold values are associated with geochemical aureoles of silver, copper, and molybdenum.	Russia

P59-02	Berezovaya	P	59	02	63 59 53N	173 52 21E	63.9980555555556	173.8725	6360'N	17352'E	Sn polymetallic vein   	Sn		Small.  	Central Koryak	Lugov and others, 1974a, b	Quartz-tourmaline-chlorite veins and lenticular breccias with fine-grained and colloform cassiterite that occur in extensive altered zones of sulfidized tourmaline-chlorite-quartz altered rock.  Main ore bodies are related to northeast-trending fractures.  Host rocks are intensely deformed Cretaceous volcaniclastic and clastic sedimentary rocks that are overlain by Cenozoic extrusive rocks of intermediate to felsic composition.  Sedimentary and volcanic rocks are intruded by stocks and dikes of granite porphyry and diabase, and hypabyssal bodies of Paleogene dacite and rhyolite.	Russia

P59-03	Agranai	P	59	03	63 52 57N	173 09 50E	63.8825	173.163888888889	6353'N	17310'E	Volcanic-hosted Hg	Hg	As, Sb	Small.  	Central Koryak	Rozenblyum, Zincevich, and Nevretdinov, 1975	Sheets and lenticular zones with disseminated veinlets containing cinnabar occur in Late Paleogene rhyolite and dacite.  Main minerals are quartz, kaolinite, and cinnabar.  Minor minerals are opal, pyrite, stibnite, realgar, and metacinnabar.	Russia

P59-04	Vaegi	P	59	04	63 32 33N	171 08 34E	63.5425	171.142777777778	6333'N	17109'E	Au quartz vein   	Au		Small.  	Anadyr	Zakharov and V.P. Vasilenko, written commun., 1977	Consists of thin quartz and carbonate-quartz veins and veinlets that contain disseminated gold, hematite, pyrite, and chalcopyrite with spare arsenopyrite. Deposit is hosted in Paleozoic and supposed Proterozoic intermediate metavolcanic rocks. Gold-cinnabar intergrowths occur in nearby heavy mineral placers which have been mined. Deposit occurs in a nappe of early Paleozoic and possibly older metavolcanic rocks that display both greenschist facies metamorphism and extensive host rock replacement by sulfide minerals and quartz, and that may have potential for vein-disseminated gold deposits 	Russia

P59-05	Pervenets	P	59	05	63 27 52N	173 51 17E	63.4644444444444	173.854722222222	6328'N	17351'E	Silica-carbonate Hg   	Hg, As, Sb		Small.  	Central Koryak	Kim, 1978	Scattered cinnabar occurs as disseminations, veinlets, and masses in a northwest trending block of fractured, silicified, and kaolinized, sandstone, siltstone, and conglomerate of Lower Cretaceous (Aptian-Albian) age.  Masses and veinlets of realgar occur with the cinnabar and separately.  Orpiment, metacinnabar, guadalcazarite, and stibnite also occur.	Russia

P59-06	Kuibiveen	P	59	06	62 43 12N	170 06 15E	62.72	170.104166666667	6243'N	17006'E	Porphyry Cu-Mo	Mo, Cu, Au		Small to medium.  	Central Koryak	Zakharov and V.P. Vasilenko, written commun., 1977; I.S. Rozenblyum, written commun., 1991	Quartz-tourmaline breccias, altered rocks, veins, and zones of linear and stockwork quartz-sulfide veinlets, are present in a nearly east-west zone about 25 km long and about 4 km wide.  Deposits are associated with a Neogene complex of small intrusions and dikes of intermediate and felsic composition.  Deposits occur along a fault that thrusts Upper Cretaceous siliceous sedimentary rocks over Oligocene-Miocene sandstone and conglomerate.  Deposit consists of disseminated molybdenite, arsenopyrite, chalcopyrite, galena, and native gold, in zones from tens of meters up to hundreds of meters thick.	Russia

P59-07	Lalankytap	P	59	07	62 08 40N	173 11 12E	62.1444444444444	173.186666666667	6209'N	17311'E	Porphyry Cu-Mo	Mo, Cu		Small to medium.  	Central Koryak	Brazhnik and Kolyasnikov, 1989; Brazhnik and Morozov, 1989	An oval stockwork about 1.2 by 0.6 km in area contains randomly oriented quartz veinlets which contain irregularly disseminated pyrite, molybdenite, and chalcopyrite, with minor pyrrhotite, sphalerite, galena, magnetite, martite, rutile, anatase, and sphene.  Ore minerals occur both in the veinlets and as disseminations between veins.  Cu and Mo minerals are related to a zone of quartz-biotite (with sericite and pyrite) alteration in both a Paleogene quartz diorite and monzodiorite pluton and in Late Cretaceous flysch which both host the deposit.  Pluton is bounded by a nearly east-west zone of pyritized altered rocks more than 11 km long and 1 to 4 km wide.  Small amounts of gold occur in Quaternary, goethite-cemented, alluvial conglomerate near the deposit.  Deposit is controlled by a nearly-east-west suture at the juncture of two major structural boundaries.	Russia

P59-08	Krassnaya Gorka	P	59	08	61 54 13N	168 47 44E	61.9036111111111	168.795555555556	6154'N	16848'E	Clastic sediment-hosted Hg or hot-spring Hg?	Hg		Small.  Average grade 0.1% Hg, but ranges up to 1.4% Hg.  	Central Koryak	Babkin, 1969	Saddle-shaped mercury deposits are confined to beds of Upper Cretaceous sandstone where cross-cutting fracture zones intersect the cores of gentle anticlinal folds.  Cinnabar is disseminated in quartz-dickite-dolomite vein material.  In addition to cinnabar, marcasite, pyrite and native arsenic are present.	Russia

P59-09	Neptun	P	59	09	61 39 52N	168 15 41E	61.6644444444444	168.261388888889	6140'N	16816'E	Clastic sediment-hosted Hg or hot-spring Hg?	Hg, Sb, As		Small.  Estimated to contain about 330 tonnes Hg grading 0.6% Hg.  	Central Koryak	Babkin, 1969; Tarasenko and Titov, 1970	Conformable, mineralized, northwest-trending fracture zones occur in Upper Cretaceous sandstone, siltstone, and shale.  Cinnabar is associated with stibnite, and minor amounts of pyrite, marcasite, realgar, galena, sphalerite, and chalcopyrite.  Ore minerals are scattered in quartz-dickite-dolomite material that cements breccia; or occur in sets of thin branching veinlets associated with quartz and carbonate.	Russia

P59-10	Snezhnoe	P	59	10	61 37 20N	171 39 09E	61.6222222222222	171.6525	6137'N	17139'E	Zoned mafic-ultramafic Cr-PGE	Cr, PGE		Small.  	Koryak Highlands	Kutyev and others, 1988a, b	Natural alloys of iron and platinum occur in chromite bodies within dunite of a zoned ultramafic complex that intrudes gabbro, clinopyroxenite, wehrlite, and dunite that in turn intrude Upper Cretaceous siliceous volcanic rocks.	Russia

P59-11	Lyapganai	P	59	11	61 33 37N	168 01 26E	61.5602777777778	168.023888888889	6134'N	16801'E	Clastic sediment-hosted Hg or hot-spring Hg?	Hg, Sb		Medium.  Estimated to contain 1400 tonnes Hg grading 0.5 to 2.4% Hg.  	Central Koryak	Tarasenko and Titov, 1970; Babkin, 1975;  Vlasov, 1977	Mineralized fracture zone in Upper Cretaceous sandstone and mudstone is cemented by quartz and dolomite with subordinate kaolinite and calcite.  Cinnabar is disseminated in the vein material or coats breccia clasts as thin rims.  Stibnite and pyrite are minor.  Ores are disseminated to massive, brecciated, in veinlets, and in banded disseminations.  Ore bodies vary in size from 0.1 to 4.2 m in width by 110 m to 420 m in length.  The most promising ore bodies occur in faults trending northeast parallel to fold axes.  Deposit has a peculiar high germanium content.  This deposit is similar to many other Hg deposits in the Koryak Upland.	Russia

P59-12	Itchayvayam	P	59	12	61 24 23N	172 19 46E	61.4063888888889	172.329444444444	6124'N	17220'E	Volcanogenic Mn	Mn		Medium.  Ranges 11 to 47.4% Mn.  	Vatyn	Egiazarov and others, 1965	Mn mineralization is confined to the Albian-Campanian basalt-siliceous Vatyn Formation.  Massive, patchy, and brecciated manganese ores form concordant, lens-like bodies 1 to 30 m long and 0.3 to 10 m thick in siliceous rocks.  Main ore mineral is braunite, but pyrolusite is present locally.  Manganese also occurs in veins of metamorphic origin 2 to 10 m long.	Russia

P60-01	Chirynai	P	60	01	63 27 03N	175 44 02E	63.4508333333333	175.733888888889	6327'N	17544'E	Podiform Cr   	Cr, PGE		Medium.  	Tamvatney-Mainits	Silkin, 1983; Dmitrenko and Mochalov, 1986; Dmitrenko and others, 1987	Thirty chromite ore occurrences are known in the Chirynai alpine-type ultramafic body.  Ore bodies occur in chains 100 to 150 m long which consist of thin lenses (up to 20-40 cm thick), masses, and schlieren of nearly massive to massive chromite.  Banded zones of disseminated chromite 5 to 7 m thick and more than 50 m long occur. Chromite occurs in dunite, commonly at the contact zone between dunite and intergrown pyroxenite, dunite, and harzburgite.  Accessory platinum-group minerals occur as Os, Ir, and Ru sulfides; and also as hexagonal solid solutions of ruthenium, osmium and iridium with iron, copper, and nickel.  Most common PGE mineral is an iron-ruthenium solid solution.  	Russia

P60-02	Tamvatney	P	60	02	63 28 44N	174 12 36E	63.4788888888889	174.21	6329'N	17413'E	Silica-carbonate Hg   	Hg, W, As		Large.  Reserves estimated at 30,000 tonnes Hg in ore averaging 0.81% Hg.  	Central Koryak	Rozenblum and others, 1973; Babkin, 1975; Voevodin and others 1979, 1980	Cinnabar, tungstenite, wolframite, and sulfides of iron and arsenic occur in mylonitized, carbonatized, silicified, and argillized serpentinite, serpentinized peridotite, conglomerate, and coarse-grained sandstone, and argillite.  Deposits occur along northern tectonic contact of the Tamvatney lherzolite ophiolite body that overlays a clastic rock sequence of Lower Cretaceous (Aptian-Albian) and Oligocene-Miocene ages.  Ultramafic rocks are intruded by bodies of Early Cretaceous gabbronorite, Late Cretaceous plagiogranite, and Neogene andesite-basalt.  Age of the deposits is assumed as Lower Pleistocene.  Main ore minerals are cinnabar, tungstenite, wolframite, huebnerite, scheelite, marcasite and pyrite.  Minor minerals include metacinnabar, stibnite, realgar, orpiment, arsenopyrite, sphalerite, chalcopyrite, millerite, bravoite, chalcocite, pyrrhotite, and hematite.  Relic ilmenite, chromite, magnetite, niccolite, and pentlandite are present in the serpentinite and silica-carbonate metasomatite.  Gangue minerals in the veins are mainly quartz, chalcedony, magnesite, dolomite, kaolinite, dickite associated with peculiar hard and liquid bitumens, and native sulfur.  Middle portion of the ore-bearing zone is made up of stockworks, masses of ore minerals, veins, and a dense network of sulfide veinlets.  Zone extends for about 20 km with an average thickness of about 20-30 m.	Russia

P60-03	Nutekin	P	60	03	63 25 27N	176 51 48E	63.4241666666667	176.863333333333	6325'N	17652'E	Au quartz vein   	Au, Hg		Small.  	Anadyr	V.P. Vasilenko, written commun., 1977	Consists of steeply-dipping quartz and quartz-carbonate veins which grade into zones of silicified and sulfidized veinlets along strike.  Deposits trend northwest and are up to 500 m long. Gold-bearing veins occur in Early Mesozoic, and less frequently Early Cretaceous, clastic sedimentary rocks. Highest gold contents are in veins within Paleogene dolerite dikes. Gold associated with rare disseminated pyrite and arsenopyrite, and is marked by high mercury content. Deposit occurs in the axial portion of a horst-anticlinorium structure. 	Russia

P60-04	Krassnaya Gora	P	60	04	63 16 19N	175 24 19E	63.2719444444444	175.405277777778	6316'N	17524'E	Podiform Cr   	Cr, PGE		Small to medium.  	Tamvatney-Mainits	Silkin, written commun., 1983, Dmitrenko and Mochalov, 1986; Dmitrenko and others, 1987	Two horizons with numerous chromite bodies occur within the Krassnaya Gora alpine-type ultramafic body.  Upper horizon occurs at the contact of dunite and an overlying intergrown pyroxenite-dunite-harzburgite assemblage. Chromite occurs in dunite bands.  Podiform and schlieren occurrences of nearly massive to massive chromite extend for 35-70 m with a thickness of up to several meters.  Several large podiform bodies at the base of dunite layers contain massive and concentrated chromite for 60-100 m along strike and are more than 1 m thick.  A zone of disseminated chromite 22 m thick occurs.  Platinum-group metals associated with chromite occur as solid solution in the sulfides with Os, Ir, and Ru in hexagonal sites, and Ir, Os, Pt, Ru, and Rh in cubic sites.  Some secondary, rare, platinum, rhodium, and palladium arsenites and sulfoarsenides are also present.	Russia

P60-05	Ugryumoe	P	60	05	63 16 00N	176 38 51E	63.2666666666667	176.6475	6316'N	17639'E	Kuroko Cu-Zn-Ag massive sulfide(?)	Cu, Zn, Pb, Au		Small.  	Mainits	Oparin and Sushentsov, 1988	Massive sulfides contain high concentrations of Cu, Zn, Pb, and Au and occur along a silicified zone up to 3 km long. Sulfides hosted in a Mesozoic sequence of interbedded basalt, plagiorhyolite, tuff, and siliceous tuffaceous siltstone. Sulfide horizons consists of massive pyrite, and chalcopyrite, pyrite, and quartz. Intrusive rocks include granite, plagiogranite, and gabbro. Deposit occurs in the Hettangian and Sinemurian Lazov sequence that consists of interbedded basalt, plagiorhyolite, tuffs, and tuffaceous siltstone. 	Russia

Q01-01	Chaantal	Q	01	01	67 52 00N	179 24 32W	67.8666666666667	-179.408888888889	6752'N	17925'W	Sn quartz vein and Sn greisen  	Sn, W	As	Small to medium.  	Chukotka	Slavtsov, written commun., 1951; Tarakanov, written commun., 1958	Sets of branching, erratic quartz veins, veinlets, and zones of greisenized rock occur within and near the West Iultin biotite granite pluton.  Ore bodies trend easterly and are several tens to hundreds of meters long.  Ore minerals are arsenopyrite, wolframite and cassiterite; chalcopyrite, scheelite, molybdenite, and beryl are less common.  Arsenopyrite and wolframite commonly occur in the middle portions of the quartz veins; cassiterite is confined to greisenized selvages.	Russia

Q01-02	Iultin	Q	01	02	67 51 25N	178 43 36W	67.8569444444444	-178.726666666667	6751'N	17844'W	Sn-W polymetallic vein and greisen	Sn, W		Large.  Discovered in 1937, mined since 1959.  Average grade 0.43% Sn, 1.29% WO3.  	Chukotka	Zilbermints, 1966; Lugov, Makeev, and Potapova, 1972; Lugov, 1986	The deposit occurs as quartz veins, mineralized stockwork zones, and disseminated veinlets in greisen.  Deposit occurs along the contact of the mid-Cretaceous Iultin granite (K-Ar age of 90-110 Ma), and is hosted by Lower and Upper Triassic sandstone and shale that has been successively subjected to contact metamorphism and metasomatism.  Mineralized quartz veins with east-west and north-south trends are the most productive, but some trend northeast and northwest as well.  Veins range from steeply-dipping to gently-dipping.  Some ore bodies wedge out vertically.  Ore bodies occur both as tungsten ore over the top of a leucogranite pluton which is about 300 m below the surface; and as tin ore in the marginal zone of the leucogranite.  Approximately 65 minerals are known, the most common are quartz (95%), muscovite, fluorite, albite, cassiterite, wolframite, arsenopyrite, and lellingite.  Topaz, pyrite, pyrrhotite, bismuthinite, stannite, chalcopyrite, sphalerite, galena, molybdenite, scheelite, hematite, and native silver and bismuth, are less common.  Cassiterite is commonly associated with wolframite, arsenopyrite, and muscovite.  Cassiterite occurs as short, columnar crystals up to 10 cm across.  Large (up to 4-9 cm) and gigantic (up to 0.5 m) wolframite crystals and crystal intergrowths are present.  The vertical extent of economic tin-tungsten ore bodies exceeds 900 m.	Russia

Q01-03	Lenotap	Q	01	03	67 46 30N	178 46 43W	67.775	-178.778611111111	6747'N	17847'W	Au quartz vein   	Au		Small.  Ranges 0.6 to 98 g/t Au, 0.7 to 18.9 g/t Ag, and up to 1.53% WO3.  	Chukotka	Panychev, written commun., 1977	Zones of cross-cutting and conformable quartz veins, veinlets, and silicified breccia occur in Upper Permian and Lower to Middle Triassic sandstone and shale at the contacts of Triassic gabbro-diabase sills.  Ore bodies vary in length from 30 to 220 m and in thickness from 0.5 to 2 m; but locally are up to 28 m thick.  Gold is associated with arsenopyrite, pyrite, galena, sphalerite, and tetrahedrite-tennanite.  Quartz veins have been metamorphosed by the Iultin tin-bearing granite.	Russia

Q01-04	Tumannoe	Q	01	04	67 39 30N	178 06 02W	67.6583333333333	-178.100555555556	6740'N	17806'W	Disseminated Au-sulfide 	Au, As, Sb		Medium.  Ranges 1.4 to 76.1 g/t Au, 0.4 to 15.6 g/t Ag, up to 1% Sb.  	Eastern Asia-Arctic: Chaun	V.P. Vasilenko and R.A. Eremin, written commun., 1977	Auriferous, fractured belts and folded zones trend about northwest and east-west in an Upper Triassic sandstone-siltsone-shale sequence.  Mineralized zones are marked by a clay-mica matrix with fine disseminated sulfides; cut by thin quartz veinlets.  Linear mineralized zones are often associated spatially with quartz-stibnite veins.  Ore structure is associated with an intricate dome-like uplift developed where a fault intersects a syncline.  Early-stage veins and veinlets with rare-earth metal minerals occur within a central granodiorite porphyry stock and the surrounding hornfels.	Russia

Q01-05	Ekug	Q	01	05	67 34 19N	178 04 16W	67.5719444444444	-178.071111111111	6734'N	17804'W	Porphyry Sn or Sn greisen  	Sn, W	As, Cu	Medium.  Sn ore contains 0.2 g/t Au and up to 32.7 g/t Ag.  No data on reserves.  	Eastern Asia-Arctic: Chaun	Greshilov and Kozlov, 1969; Lugov, Makeev, and Potapova, 1972; Lugov, 1986	Stocks and dikes of late Cretaceous quartz porphyry are altered to tSn-bearing quartz-topaz greisen in association with abundant fluorite and sericite.  Subordinate mineralization consists of fractured zones and cassiterite-quartz stockworks in Upper Triassic sandstone and shale.  Highly altered quartz-topaz rocks with abundant disseminated fluorite, arsenopyrite, and lesser cassiterite and wolframite, also occur in contact-metamorphosed sedimentary rocks near the central porphyry stock; especially near radial fractures.  Cassiterite is finely disseminated in greisen; larger crystals are present in quartz-sulfide veinlets.  Cassiterite is typically associated with arsenopyrite, pyrite, and chalcopyrite; and less commonly with galena, sphalerite, and stannite.  By-product Au and Ag occur in sulfides.  	Russia

Q01-06	Granatnoe	Q	01	06	67 11 56N	179 08 53W	67.1988888888889	-179.148055555556	6712'N	17909'W	Porphyry Mo	Mo		Small.  	Eastern Asia-Arctic: Chaun	Rokhlin, written commun., 1961	Quartz veins with feldspar, muscovite, tourmaline, and chlorite up to 130 m long and up to 0.6 m thick are confined to a Cretaceous granite body.  Molybdenite is present as disseminations and masses up to 3-5 cm in size.  Minor chalcopyrite, arsenopyrite, pyrite, pyrrhotite, and wolframite.	Russia

Q01-07	Matachingai	Q	01	07	66 25 21N	179 21 59W	66.4225	-179.366388888889	6625'N	17922'W	Silica-carbonate Hg   	Hg		Small.  	Eastern Asia-Arctic: Chukotka	Babkin, 1975; Kim, 1978; Kopytin, 1978	Small lenses, masses, and irregular occurrences of cinnabar occur in thin monominerallic or quartz- and carbonate-bearing veinlets in serpentinite, silica-carbonate metasomatites, and less commonly in propylitized extrusive volcanic rocks.  Mineralized area is in a mass of serpentinized peridotite in tectonic contact with Upper Cretaceous brecciated basalt and andesite tuff.  Sheet-like bodies of ore-bearing silica-carbonate rocks are mostly steeply dipping, locally gently inclined, and are fault bounded.  They form chain-like strings tens to hundreds of meters long.  Altered rocks are mainly carbonate varieties and are broken by northeast-trending faults.  Cinnabar ore shoots occur at these altered-zone/fault intersections.  Cinnabar is mainly associated with magnesite, dolomite, and quartz; talc, chlorite, kaolinite, pyrite, chalcopyrite, arsenopyrite, marcasite and millerite are less common.	Russia

Q01-08	Eruttin	Q	01	08	66 23 37N	178 55 19W	66.3936111111111	-178.921944444444	6624'N	17855'W	Sn silicate-sulfide vein   	Sn		Small to medium.  	Eastern Asia-Arctic: Chaun	Zilbermints and Kolesnichenko, 1973; Lugov and others, 1974a, b	Consists of a dense network of thin, quartz and quartz-tourmaline veinlets which contain fine-grained cassiterite and sulfides.  Deposit occurs in a zone of intense silicification, sericitization, tourmalinization, sulfidization, and locally kaolinization, up to 2.5 km long; which is controlled by northeast fractures.  High-grade tin-bearing zones are several tens to hundreds of meters long.  Deposit occurs above a Late Cretaceous granitic pluton in a Lower Cretaceous andesite-dacite sequence intruded by numerous stocks and dikes of granodiorite porphyry, granite, andesite-basalt, and dolerite of Early Cretaceous to Paleogene age.	Russia

Q01-09	Elmaun	Q	01	09	66 19 21N	179 45 38W	66.3225	-179.760555555556	6619'N	17946'W	Sn silicate-sulfide vein   	Sn		Small to medium.  	Eastern Asia-Arctic: Chaun	Lugov and others, 1974a, b	Tourmaline, chlorite, and arsenopyrite-quartz veins and veinlets with cassiterite, occur in zones of chlorite and sericite-quartz alteration.  Mineralized area occurs in the periphery of a caldera-like structure composed of Lower and Upper Cretaceous volcanic rocks of intermediate and felsic composition, which are intruded by Cretaceous and Paleogene hypabyssal rocks.  A deeply buried intrusion is suspected.  Sulfide-polymetallic bodies containing sphalerite, galena, chalcopyrite, and other minerals are prevalent in the upper portions of the deposit.	Russia

Q01-10	Pepenveem	Q	01	10	65 52 22N	175 37 01W	65.8727777777778	-175.616944444444	6552'N	17537'W	Au-Ag epithermal vein	Au, Ag	Cu, Pb, Zn	Medium.  Ranges 0.2 to 112.3 g/t Au and 20 to 5430 g/t Ag.  	Eastern Asia-Arctic: Chaun	Berman and Naiborodin, 1967; Sidorov, 1978	Adularia-quartz and adularia-carbonate-quartz veins and veinlets occur in an altered zone up to 1 km long.  Most veins are hosted in an Upper Cretaceous rhyolite-ignimbrite sequence near the periphery of a large volcanic subsidence structure.  Ore bodies are controlled by widespread northwest and northeast fracturing and are associated with widespread hydrothermal alteration of Paleogene volcanic layers.  Alteration includes regional propylitization and local silicification, adularization, sericitization, and kaolinization.  Ore mineral associations are:  (1) pyrite-arsenopyrite (Au:Ag 30:1 to 1:25);  (2) chalcopyrite-galena-sphalerite with tetrahedrite-tennantite, gold, and silver (Au:Ag 1:30 to 1:50);  (3) gold-pyrargyrite with argentite, polybasite, stromeyerite, and native silver (Au:Ag 1:1.5 to 1:3000); and  (4) hematite.  Chalcopyrite-galena-sphalerite and gold-pyrargyrite associations are the most wide-spread.	Russia

Q01-11	Dioritovoe	Q	01	11	65 39 56N	174 06 21W	65.6655555555556	-174.105833333333	6540'N	17406'W	Sn polymetallic vein   	Sn	Ag, Cu, Pb, Bi	Medium.  	Eastern Asia-Arctic: Chaun	Nedomolkin, 1974; Lugov and others, 1974a, b	Ore bodies are confined to zones of fractured and hydrothermally altered Lower Triassic shale, sandstone, and siltstone.  Ore zones vary in thickness from several meters to 150-200 m, and extends 100 m to 2.5 km along strike.  The central zone consists of banded bodies up to 2-3 m thick with abundant quartz-sulfide and sulfide veinlets which contain cassiterite as cryptocrystalline aggregates, wolframite, pyrite, arsenopyrite, galena, tetrahedrite-tennantite, chalcopyrite, and sphalerite.  The outer zone, a band 4-5 m wide, consists of quartz-sericite-chlorite altered rocks and a dense network of cassiterite-bearing quartz-sericite-chlorite, quartz-sulfide, and sulfide veinlets; with pyrite, arsenopyrite, chalcopyrite, and cubanite.  Silver and bismuth values are high.  Magmatic rocks occur within 0.5-2 km; including Early Cretaceous gabbro and gabbro-diorite dikes, hypabyssal bodies of diorite porphyry and granodiorite, Late Cretaceous rhyolite and diorite porphyry dikes, and Paleogene gabbroic dikes.  Tin is assumed to be related to Late Cretaceous volcanism.	Russia

Q01-12	Enpylkhkan	Q	01	12	65 20 06N	174 15 59W	65.335	-174.266388888889	6520'N	17416'W	Pb-Zn skarn   	Pb, Zn, Cu, Ag		Small.  Contains up to 140 g/t silver.  	Eastern Asia-Arctic: Chaun	Spirov, written commun., 1954	Disseminated, massive, and banded galena-sphalerite-chalcopyrite ore bodies occur in skarn in Paleozoic limestone above a Late Cretaceous granite porphyry.  Banded pyroxene skarn is at least 40 m thick and extends for 350-400 m to the northeast.	Russia

Q02-01	Serdtse-Kamen	Q	02	01	66 50 17N	171 44 16W	66.8380555555556	-171.737777777778	6650'N	17144'W	Pb-Zn skarn	Pb, Zn, Cu, Sn, Ag		Small.  	Eastern Asia-Arctic: Chaun	Chaikovsky, 1960	A set of quartz-sulfide and quartz-carbonate-sulfide veins occurs in skarn developed in Paleozoic limestone at the contact of a satellite of a Cretaceous granitic pluton.  Ore is composed of pyrrhotite (25-35%), sphalerite (15-25%), galena (5-15%), and chalcopyrite (5-10%) with subordinate arsenopyrite, pyrite, cassiterite, stannite, scheelite, proustite, pyrargyrite, and gold.	Russia

Q02-02	Barin	Q	02	02	66 22 00N	172 03 33W	66.3666666666667	-172.059166666667	6622'N	17204'W	Ag polymetallic vein and replacement  	Ag, Zn		Medium.  Contains up to 754 to 2148 g/t Ag.  	Eastern Asia-Arctic: Chaun	Kryukov, written commun., 1974	Ore zone at contact between a Late Cretaceous granite-porphry dike and mid-Paleozoic limestone.  Dike trends northeast; it is about 8-10 m thick and 1 km long.  Limestone is cemented by quartz with disseminated sphalerite and small amounts of copper minerals over an area 10-12 m long and 2-3 m wide.	Russia

Q02-03	Melyul	Q	02	03	66 15 47N	172 03 59W	66.2630555555556	-172.066388888889	6616'N	17204'W	Pb-Zn-(Cu)-Ag skarn	Pb, Zn, Ag, (Cu)		Small.  Up to 165 g/t Ag.  	Eastern Asia-Arctic: Chaun	Kryukov, written commun., 1974	Polymetallic occurrence composed of pyrite, galena, sphalerite, and chalcopyrite in epidote-garnet and vesuvianite-pyroxene-garnet skarn at the contact between an Early Cretaceous granitic body and Proterozoic(?) marble.  	Russia

Q02-04	Erulen	Q	02	04	66 09 16N	173 17 07W	66.1544444444444	-173.285277777778	6609'N	17317'W	Sn silicate-sulfide vein   	Sn		Small to medium.  	Eastern Asia-Arctic: Chaun	Nedomolkin, 1974	Quartz-tourmaline and sulfide-quartz-tourmaline veins and veinlets 2 to 20 cm thick with disseminated cassiterite and masses of sulfides, are found in the middle of a zone of tourmaline alteration replacing brecciated granitic rocks.  Also contains muscovite, fluorite, calcite, scheelite, arsenopyrite, pyrite, chalcopyrite, galena, and sphalerite.  Zone of mineralization is about 3.5 km long and up to 500 m wide.  Deposit occurs at the margin of a Late Cretaceous tourmaline two-mica granite pluton that intrudes Permian to Triassic clastic sedimentary rocks and Triassic gabbro.	Russia

Q02-05	Reechen	Q	02	05	64 57 13N	172 29 16W	64.9536111111111	-172.487777777778	6457'N	17229'W	Fe-Pb-Zn-Sn skarn   	Fe, Pb, Zn, Sn		Small.  	Eastern Asia-Arctic: Chaun	Nedomolkin, 1974	Garnet-magnetite-epidote-vesuvianite skarn bodies occur for 250-400 m at the contact between Middle Devonian limestone and phyllite, and Early Cretaceous granite.  Skarn contains lenses and bands up to 2 m thick of pyrite, arsenopyrite, galena, and sphalerite.  Sulfide bodies exhibit high Sn concentrations.	Russia

Q02-06	Chechekuyum	Q	02	06	64 35 50N	172 45 20W	64.5972222222222	-172.755555555556	6436'N	17245'W	Pb-Zn skarn   	Pb, Zn, Cu, Ni		Small.  	Eastern Asia-Arctic: Chaun	Zhukov and others, written commun., 1953	Gently dipping deposit, about 18 m thick and 30 m along strike, composed of pyrrhotite, sphalerite, galena, chalcopyrite, magnetite, pyrite, niccolite, marcasite, calcite, garnet, diopside, and quartz.  Ore bodies confined to a fracture zone in skarn developed in Middle Devonian limestone, that is overlain by Upper Cretaceous felsic extrusive rocks and cut by granite porphyry and spessartite dikes.  Massive and disseminated pyrrhotite ore occurs in the hanging wall.  Massive galena, and less common sphalerite-galena ore, are present in the middle part of the ore body.  Sparse massive sphalerite ore is prominent in the hanging wall.  Ore minerals are sparsely disseminated.  Anomalous Sn, Cd, cobalt, Bi, and Ag occur.	Russia

Q03-01	Iyikrok Mountain	Q	03	01	67 54 00N	163 40 00W	67.9	-163.666666666667	6754'N	16340'W	Podiform Cr	Cr		Grab samples with up to 33% Cr, and 0.2 g/t PGE.  Estimated 130,000 to 350,000 tonnes chromite	Kobuk	Mayfield and others, 1983; Foley and others, 1985, 1992; Foley, 1988 	Disseminated fine- to medium-grained chromite in Jurassic or older dunite and peridotite tectonite that has been locally serpentinized.  Platinum observed in one sample.  Zones with chromite up to 90 m wide and 305 m long in dunite.  Host rocks part of the Misheguk igneous sequence.  Mafic and ultramafic rocks floored by major thrust fault.	Alaska

Q03-02	Ear Mountain area, (Winfield)	Q	03	02	65 56 00N	166 12 00W	65.9333333333333	-166.2	6556'N	16612'W	Sn skarn	Sn, Cu, Ag, Pb, Zn		Produced several hundred tonnes Sn	Seward Peninsula	Killeen and Ordway, 1955; Mulligan, 1959; Sainsbury, 1972; Hudson and others, 1977; Bond, 1983; Hudson and Arth, 1983; Swanson and others, 1988	Cassiterite, stannite, and chalcopyrite in skarn and sparse cassiterite-quartz veins along margin of Late Cretaceous multistage biotite granite stock intruded into argillaceous limestone.  Highly variable contact metamorphic silicate and sulfide mineral assemblages.  Tourmaline-quartz greisen veins in upper part of granite.  Local occurrence of U in oxidized tourmalinized mafic dike and adjacent biotite granite.  Deposit associated with with late-magmatic stage of Late Cretaceous granite about 76.7 Ma.  	Alaska

Q03-03	Cape Mountain	Q	03	03	65 35 00N	168 00 00W	65.5833333333333	-168	6535'N	16800'W	Sn quartz vein	Sn	W	Produced about 940 tonnes of Sn, mainly from placers. Very minor production from lode deposits.	Seward Peninsula	Knopf, 1908; Steidtman and Cathcart, 1922; Mulligan, 1966; Hudson and Arth, 1983; Bundtzen and others, 1990	Occurrences of cassiterite, tourmaline, pyrite, pyrrhotite, fluorite, scapolite, sphalerite, and scheelite along margin of Cretaceous granite.  Deposits occur in periphery of pluton, in dikes, in contact-metamorphosed and contact-metasomatized wall rocks, and in quartz veins in pluton.  Cassiterite also occurs as replacement of limestone near intrusive contact.  Granite intrudes Mississippian limestone, dolomitic limestone, and shale.  Age of granite 78.8 Ma.  Several small lode prospects and one small lode mine whose main production was from 1903 to 1909.  About 9 tonnes cassiterite concentrate shipped in 1905.  Probable source for Goodwin Gulch and Tin City cassiterite placer deposits.  Strong cassiterite production from placers in Cope Creek and Goodwin Gulch from the mid-1970's to 1989 when placers were exhausted.  Total production during this period was about 2.07 million pounds of tin.  	Alaska

Q03-04	Potato Mountain	Q	03	04	65 38 00N	167 35 00W	65.6333333333333	-167.583333333333	6538'N	16735'W	Sn quartz vein	Sn		Up to a few percent Sn	Seward Peninsula	Steidtman and Cathcart, 1922; Sainsbury, 1969; Hudson and others, 1977; Bruce M. Gamble, written commun., 1986	Scattered veins and veinlets of quartz, clay, cassiterite, pyrite, and arsenopyrite associated with contact-metamorphosed tin- and tourmaline-bearing Precambrian or lower Paleozoic carbonaceous phyllite, metasiltstone, and slate, all part of the slate-of-the-York region of Sainsbury.  Gravity data indicate an intrusive body lying within 0.5 km of surface.  One granitic dike exposed.  A small dredge recovered cassiterite for many years and nonfloat placer mining continued in several creeks in the vicinity until the mid-1950's (Cobb, 1973).  Limited exploration over the years including an unsuccessful attempt to drill into the top of the buried pluton in 1990.  	Alaska

Q03-05	Lost River	Q	03	05	65 28 00N	167 10 00W	65.4666666666667	-167.166666666667	6528'N	16710'W	Sn-W skarn, Sn greisen, Carbonate-replacement Sn(?)	Sn, W, F, Be	Zn Cu, Pb, Ag	Reserves of 25 million tonnes grading 0.15% Sn, 0.03% WO3, 16.3% CaF2.  Produced 320 tonnes Sn	Seward Peninsula	Steidtman and Cathcart, 1922; Sainsbury, 1963, 1964, 1965, 1969; WGM, Incorporated, Anchorage, written commun., 1973; Dobson, 1982; Hudson and Arth, 1983; Reed, Menzie, and others, 1989	Several deposits and one mine in veins, skarns, greisens, and intrusion breccia formed above a shallow Late Cretaceous granite stock intruding thick sequence of Lower Ordovician limestone and argillaceous limestone.  Early-stage andradite-idocrase skarn and later fluorite-magnetite-idocrase vein skarns altered to chlorite-carbonate assemblages that are contemporaneous with greisen formation and cassiterite deposition.  Major ore minerals in skarns and greisen are cassiterite and wolframite, with lesser stannite, galena, sphalerite, pyrite, chalcopyrite, arsenopyrite, and molybdenite, and a wide variety of other contact metamorphic and alteration minerals.  Age of granite 80.2 Ma.  Production mostly from 1952 to 1955 from underground workings a few hundred meters deep along the Cassiterite dike.  This dike is a near-vertical rhyolite dike, extensively altered to greisen over the buried granite.  Similar smaller deposits nearby include tin-greisen and veins near the Tin Creek Granite and various polymetallic veins and skarns near the Brooks Mountain Granite.  Large beryllium deposits peripheral to the skarns replace limestone as fluorite-white mica veins that contain diaspore, chrysoberyl, and tourmaline; probably associated with early stages of granite intrusion.  Potential for carbonate-replacement tin deposit.  Some placer tin recovered from creek below Lost River mine but placers now exhausted.  Major exploration program in early 1970's drilled out several large Sn-W-fluorite-Be ore bodies but depressed metal prices caused cancellation of the program short of development.  	Alaska

Q03-06	Kougarok	Q	03	06	65 41 00N	165 14 00W	65.6833333333333	-165.233333333333	6541'N	16514'W	Sn greisen with Ta and Nb	Sn, Ta, Nb		Average grade of 0.5% Sn; 0.01% Ta and 0.01% Nb.	Seward Peninsula	Hudson and Arth, 1983; Christopher C.  Puchner, written commun., 1984; Puchner, 1985, 1986; Reid, 1987	Occurs in association with a buried Cretaceous granitic complex, mainly as disseminated cassiterite in quartz-tourmaline-topaz greisen, associated with disseminated tantalite-columbite in quartz-white mica greisen.  Sn deposits occur in steep cylindrical pipes of greisenized granite, greisenized dikes, in greisen along roof zone of subhorizontal granite sills, and as stockwork veinlets in schist.  Late Cretaceous granite dikes, sills, and plugs above the buried pluton are interpreted as subvolcanic analogues to topaz rhyolite.  Granitic rocks intrude poly-deformed graphitic and calcareous quartz schist, part of the undifferentiated Nome Group of Sainsbury (1972), and probably equivalent to the pelitic schist unit of Till (1984).  Extensive drilling of properties, 1979 to 1983; dormant since.   	Alaska

Q03-07	Serpentine Hot Springs	Q	03	07	65 48 00N	164 32 00W	65.8	-164.533333333333	6548'N	16432'W	Polymetallic vein	Pb, Zn, As, Ag, Au, Sn		No data	Seward Peninsula	Hudson and others, 1977; Joseph A. Briskey, written commun., 1985	Quartz veins and stringers, with disseminated  limonite and pyrite, and possibly minor chalcopyrite and argentiferous galena, cut Paleozoic(?) schist composed of varying proportions of quartz, muscovite, chlorite, chloritoid, graphite, pyrite, pyrrhotite, and albite at Midnight, Humboldt, and Ferndale Creeks.  Schist part of the mixed unit of Till (1984).  Few thin granitic to rhyolitic dikes contain disseminated pyrite and fluorite.  Deposit about 5 km from southeast margin of the Sn-bearing Cretaceous Oonatut Granite Complex.  Limited exploration.  Deposit exposed in trenches cut along northwest- or east-trending faults.	Alaska

Q03-08	Hannum Creek	Q	03	08	65 56 00N	163 21 00W	65.9333333333333	-163.35	6556'N	16321'W	Metamorphosed sedimentary exhalative Zn-Pb?	Pb, Zn, Ag		Up to 10% Pb, 2.2% Zn, 1.4g/t Au, and 60.4 g/t Ag	Northwestern Brooks Range	Herreid, 1965b; Joseph A. Briskey, written commun., 1985.	Blebs, stringers, massive boulders, and disseminations of galena, pyrite, sphalerite, and barite with gangue of quartz, calcite, and limonite gangue; occurs in Paleozoic micaceous quartzite, marble, and quartz-mica-graphitic schist, all within or near exposures of crudely banded micaceous quartzite enclosed in an isolated lens of marble.  Marble interbedded with early Paleozoic quartz-mica-graphite schist, part of mixed unit of Till (1984).  Deposit is highly oxidized; exposure is poor.  Zones of blebs, stringers, and disseminations appear conformable with bedding and banding in quartzite.  Zones up to 90 m wide and extend for about 2 km along northwest-southeast trend.  Two km farther southeast along strike are oxidized stringer zones or lenses of limonite, quartz, and chlorite are cut by veins and stockworks of quartz and chlorite.  Stringer zones and lenses composed of interlayered marble and calcareous quartz-muscovite schist.  Quartzite is interpreted as metamorphosed laminated exhalite, possibly a sedimentary exhalative Zn-Pb deposit.  Thin lenses of marble are interpreted as former limestone mounds that formed near exhalative vents.	Alaska

Q03-09	Independence	Q	03	09	65 41 00N	162 28 00W	65.6833333333333	-162.466666666667	6541'N	16228'W	Polymetallic vein	Pb, Ag		Samples contain up to 30% Pb, 5,145 g/t Ag, 3.4 g/t Au.  Dump specimens average about 20 % Pb and 686 g/t Ag.  Produced a few hundred tonnes ore	Seward Peninsula	Hudson and others, 1977; Joseph A. Briskey, written commun., 1985	Oxidized pyrite, galena, sphalerite, and minor tetrahedrite in a vein now composed primarily of limonite and sheared calcite.  Vein localized in a fault zone trending nearly north-south.  Host rocks are sheared and schistose, micaceous and banded, Paleozoic marble, a Cretaceous granitic pluton crops out about 4 km to the northwest.  Deposit exposed in open cuts 2-4 m wide over a length of 600 m.  Small production in 1921 and 1922, and limited exploration during several periods since.  A few hundred meters of underground workings.	Alaska

Q03-10	Windy Creek	Q	03	10	65 10 00N	162 37 00W	65.1666666666667	-162.616666666667	6510'N	16237'W	Porphyry Mo	Mo	Pb, Zn	Grab samples with up to 0.15%  Mo, 0.05% Sn, 0.05% W, 0.15% Pb	Seward Peninsula	Miller and others, 1971; Hudson and others, 1977; Joseph A. Briskey, written commun., 1984	Veins and stringers of quartz, pyrrhotite, pyrite, fluorite, molybdenite, galena, and sphalerite in hornblende granite of the Cretaceous(?) Windy Creek pluton.  Molybdenite reported in skarn along pluton margin.  Sporadic stringers and veinlets of quartz containing pyrrhotite, pyrite, and fluorite occur near dikes of altered biotite granodiorite intruding the granite.  Wall rocks part of the lower Paleozoic mafic schist, and schist and marble of the mixed unit of Till (1984).  Little, if any, exploration.  	Alaska

Q03-11	Death Valley	Q	03	11	65 03 00N	162 15 00W	65.05	-162.25	6503'N	16215'W	Sediment-hosted U	U		Average grade of 0.27 % U3O8.  Estimated 450,000 kg uranium oxide	Seward Peninsula	Dickinson and Cunningham, 1984; Dickinson and others, 1987	Mainly meta-autunite in Paleocene continental sandstone.  Sandstone occurs in marginal facies of a Tertiary sedimentary basin where nearshore coarse arkosic clasts are interbedded with coal and lacustrine deposits.  Interpreted as forming when uranium-bearing oxidized groundwater moved down from Cretaceous granitic plutons to west along hydrologic gradient.  U precipitated in reducing environment of coal layers.  Age of deposit estimated at middle or late Tertiary. 	Alaska

Q03-12	Omilak area	Q	03	12	65 02 00N	162 41 00W	65.0333333333333	-162.683333333333	6502'N	16241'W	Polymetallic vein 	Pb, Ag, Sb	Au, Cu, Sn, As	About 300 tonnes Au-Pb ore averaging about 73% Pb and 5,000 g/t Ag produced from Omilak mine	Seward Peninsula	Smith and Eakin, 1911; Herreid, 1965b; Mulligan, 1962; Hudson and others, 1977; Joseph A. Briskey, written commun., 1985; Bruce M. Gamble and Alison B. Till, written commun., 1986	Contains the Omilak Mine and two nearby prospects, the Foster and Omilak East.  Deposits consist of lenses and gossans of argentiferous galena associated with  cerussite, anglesite, pyrite, arsenopyrite, unknown tin sulfosalts(?), and traces of chalcopyrite, with highly variable amounts of calcite, dolomite, tremolite, wollastonite, and other calc-silicate minerals.  Veinlets and flat lenses of stibnite also occur at the Omilak mine.  Veins and gossan occur along axes and limbs of northwest-plunging folds in Paleozoic(?) marble, and in graphitic, pyrite-feldspar schist, and micaceous schist.  Bleaching and silicification associated with veins and gossan.  Similar small occurrences are found in an area extending about 12.6 km north from Omilak to the Windy Creek pluton.  Omilak mine consist of 55-m-deep shaft, 150-m-long adit, and two working levels.  Limited underground exploration prior to 1930; only limited surface trenching since.  Production between 1881 and 1890.	Alaska

Q03-13	Nome district, Mt. Distin	Q	03	13	64 40 00N	165 28 00W	64.6666666666667	-165.466666666667	6440'N	16528'W	Au quartz vein	Au		Grab samples with up to 120 g/t Au, 10 g/t Ag, >0.2% As, >0.1% Sb	Nome	Smith, 1910; Cathcart, 1922; Gamble and others, 1985; D.L. Stevens, written commun., 1991	Quartz veins along high-angle faults with sparse disseminated gold, arsenopyrite, and sparse pyrite in gangue of quartz, minor carbonate, and plagioclase.  Minor chalcopyrite, sphalerite, galena, stibnite, tetrahedrite, and scheelite.  Veins range from 2 cm to 1 m wide, most less than 10 cm wide.  Several veins contain up to 50 percent stibnite and minor pyrite. Veins occur along thrust faults in zone with strike length of about 6 km and up to 600 m wide. District includes MacDuffie, Sliscovitch, California Gulch, and Stipec, and Kotovic deposits in the Nome district, and many deposits in the Mt. Distin area.  Faults in two regional sets trending northeast and northwest.  Veins and faults occur in metasedimentary rocks of the Paleozoic mixed unit of Till (1984) and Gamble and others (1985)  and in mafic schist of the Nome Group.  Late Jurassic or Early Cretaceous age estimated for regional metamorphism, with vein formation during waning stages of metamorphism.	Alaska

Q03-14	Rock Creek	Q	03	14	64 35 00N	165 29 00W	64.5833333333333	-165.483333333333	6435'N	16529'W	Au quartz vein	Au, Ag, W		6.04 million tonnes 2.4 g/t Au; up to 0.3% W	Nome	Ted Eggelston and R.V. Bailey, written commun., 1990-1991; Apodaca, 1992	Arsenopyrite, scheelite, galena, stibnite, and pyrite in northeast-trending sheeted quartz vein system.  Surface exposures indicate mineralization extends for 1200 meters along strike and average 70 meters wide and up to 150 meters deep.  Host lithologies are phyllite and schist of Paleozoic Nome Group.  Fluid inclusion studies indicate ore deposition occurred in the mesothermal range (240C-320C).  Ore minerals emplaced along selvages of quartz-host rock contacts.  Deposit is believed to have formed by hydrofracturing and dewatering event during waning stages of mid-Cretaceous metamorphic event.	Alaska

Q03-15	Big Hurrah	Q	03	15	64 39 00N	164 14 00W	64.65	-164.233333333333	6439'N	16414'W	Au quartz vein	Au		Recent assays of 25 to 65 g/t Au.  Produced about 155,500 g Au, averaging about 34.3 g/t Au	Nome	Collier and others, 1908; Cathcart, 1922; Asher, 1969; Mullen, 1984; Gamble and others, 1985; Read, 1985; Read and Meinert, 1986	Four major quartz veins, and zones of ribbon quartz 1 to 5 m thick and a few hundred meters long contain sparse gold, pyrite, and arsenopyrite, with minor scheelite, chalcopyrite, and sphalerite, in gangue of quartz, carbonate, and feldspar.  Intermixed with older, concordant, non-Au-bearing, metamorphic quartz veins.  Au-bearing veins range from discordant tension veins to discontinuous quartz lodes that occur in shear zones crossing foliation.  Au-bearing veins range from 0.5 to 5 m wide, and extend to a depth of at least 90 m.  Most veins are less than 1 m wide.  Veins and zones occur in quartz-rich, Paleozoic, graphitic, quartz-mica schist or quartzite of the Nome Group (the mixed unit of Till, 1984).  Up to 15 percent arsenopyrite occurs in one vein.  Veins interpreted to have formed during shearing and uplift associated with metamorphic dehydration.  Late Jurassic or Early Cretaceous age estimated from regional metamorphism.  Production from 1903 to 1909, and 1953-1954.  Shaft 75 m deep; about 550 m of underground workings.  Periodically re-examined and considerable exploration during the 1980's.  	Alaska

Q03-16	Daniels Creek, (Bluff)	Q	03	16	64 34 00N	163 44 00W	64.5666666666667	-163.733333333333	6434'N	16344'W	Au quartz vein	Au, Ag	As, Sb	At least 5.9 million tonnes grading 3.4 g/t Au.  Grab samples with 4 to 40g/t  Au, 10 g/t Ag, 4.8% As, >0.1% Sb	Nome	Herreid, 1965a; Mulligan, 1971; Hudson and others, 1977; Gamble and others, 1985; Richard Heinze, written commun., 1990; Don Stevens, written commun., 1991	Sulfide poor, arsenopyrite, scheelite, and pyrite bearing, auriferous quartz pods and veins extend for about 2 km strike length in three separate mineralized zones:  Daniels Creek, Koyana Creek, and the Saddle Prospect.  Sheeted veins up to 75 cm wide hosted in Paleozoic marble and quartz-mica-feldspar schist of the Nome Group.  Interstitial native gold in arsenopyrite-rich fractions.  Two quartz veins contain up to 60 percent arsenopyrite.  Mineralization was originally thought to be one or several strata-bound gold-bearing schist units; however drilling has shown that best auriferous mineralization occurs in deformed rocks along two en echelon thrust faults.  Regional metamorphism probably of Late Jurassic or Early Cretaceous age; veins formed in waning stages of metamorphism.  Minor underground workings; negligible production.  Probable source of gold in nearby Daniels Creek placer deposit and some marine placers of the Solomon District.  	Alaska

Q03-17	Eagle Creek	Q	03	17	64 42 00N	162 46 00W	64.7	-162.766666666667	6442'N	16246'W	Felsic plutonic U	U, Th, REE		Grab samples of float with up to 0.15% U3O8, 1.05% Th, and 2% REE	Seward Peninsula	West, 1953; Miller and others, 1976; Miller and Bunker, 1976	U-, Th-, and REE-minerals disseminated along margins of alkaline (pulaskite) dikes intruded into Cretaceous Kachauik granitic pluton, marble, and schist.  Idocrase principal U-, Th-, and REE-bearing mineral.  Local numerous occurrences of U- and Th-minerals in stream-sediment samples underlain by the nearby Darby pluton (granite).	Alaska

Q03-18	Monarch, Cub Bear, American	Q	03	18	64 48 00N	165 24 00W	64.8	-165.4	6448'N	16524'W	Stratabound Fe-Mn	Fe, Mn, F		May contain up to 750,000 tonnes averaging 45% Fe and 8% Mn. Also contains anomalous Zn.	Sinuk River	Herreid, 1978, 1970; Bundtzen and others, 1994, 1995.	Massive segregations and lenses of goethite pseudomorphs of magnatite and pyrolusite, and very minor sphalerite and fluorite. Ore minerals generally occur parallel to flat-lying layering in calc-schist and marble of the Mount Distan sequence, part of the highly-deformed Nome Group. Extensive dolomite replacement near contacts between meta sedimentary rocks in area of deposits suggests thrust fault modification of original stratabound Fe deposits. Deposit interpreted as stratabound deposit modified by subsequent regional metamorphism and penetrative deformation. Gossan at the Monarch deposit occurs along the steeply-dipping Monarch fault.	Alaska

Q03-19	Aurora Creek	Q	03	19	64 46 00N	164 58 00W	64.7666666666667	-164.966666666667	6446'N	16458'W	Kuroko massive sulfide?	Zn, Pb, Cu, Ba, Ag, Au		Nearly 2,400 m of mineralized layers along strike; one zone in one drill core contains an average of 15.9% Zn, 1.38% Pb, 0.07 % Cu, 35% Ba, 2.6 g/t Au, 45 g/t Ag	Sinuk River	Herreid, 1968, 1970; Bundtzen and others, 1994, 1995	Disseminated to massive sphalerite, galena, barite, pyrite, magnetite, and minor chalcopyrite in muscovite-feldspar metavolcanic schist of Aurora Creek sequence that is part of the Late Proterozoic and early Paleozoic Nome Group. Sulfide minerals occur for 2,400 m along strike. Explored by with limited drill cores and trenches. Intense alteration to tourmaline occurs in feldspar-rich metavolcanic schists near massife sulfides and barite occurrences. Limited sulfur isotopic analyes indicate formation in seawater-contaminated, marine volcanogenic setting. Similar, but smaller occurrences occur at nearby prospects at Nelson, Rocky Mountain Creek, and Quarry. Deposit interpreted as stratabound deposit modified by subsequent regional metamorphism and regional deformation. Aurora Creek deposit interpreted as similar to Ansil mine and related deposits in Noranda area of Quebec.	Alaska

Q04-01	Omar	Q	04	01	67 30 00N	161 50 00W	67.5	-161.833333333333	6730'N	16150'W	Kipushi Cu-Pb-Zn	Cu, Pb, Zn, Ag, Co		Grab samples with 15.3% Cu, 0.14% Pb, 0.95% Zn, and 20 g/t  Ag	Northwestern Brooks Range	Degenhart and others, 1978; Jansons, 1982; Mayfield and others, 1983; Inyo F. Ellersieck, written commun., 1985; Folger and Schmidt, 1986	Disseminated to massive chalcopyrite, bornite, lesser chalcocite, minor tennantite-tetrahedrite, very minor galena, supergene copper carbonates, and iron-oxide minerals occur in veinlets, irregular stringers, or as blebs in brecciated dolomite.  Gangue dolomite, calcite, and quartz with anomalously high Zn and Co.  Sulfide zone about 3 km long occurs along north-northwest trending fractures.  Local solution breccia and faulted and brecciated gossan.  Local remobilization of sulfides into fractures.  Host rocks are Ordovician to Devonian dolomite and limestone of the Baird Group; part of Kelly River allochthon.  Host rocks strike north-northeast to south-southeast; dips vary from gentle to vertical.  Few minor isoclinal folds.	Alaska

Q04-02	Frost	Q	04	02	67 28 00N	161 35 00W	67.4666666666667	-161.583333333333	6728'N	16135'W	Cu-Zn-Pb-Ba vein	Cu, Zn, Pb, barite		Estimated to contain 0.9 million tonnes barite; and possibly as much as 9 million tonnes.  One vein with 13.2% Zn, 0.5% Cu, and 21% barite	Northwestern Brooks Range	Degenhart and others, 1978; Inyo F. Ellersieck and J.M. Schmidt, written commun., 1985	Chalcopyrite and galena in undulating quartz-calcite-barite veins, and lenses and pods of barite at least 30 m long by 10 m thick.  Veins, lenses, and pods crosscut Ordovician to Devonian dolomite and limestone of the Baird Group for at least 1.6 km.  Some calcite-barite veins surround barite lenses.	Alaska

Q04-03	Smucker	Q	04	03	67 18 00N	157 12 00W	67.3	-157.2	6718'N	15712'W	Kuroko massive sulfide	Cu, Zn, Pb, Ag		More than 8 million tonnes with 0.8% Cu, 2.3% Pb, 6.8% Zn, 6.4 oz/t Ag, minor Au	Arctic	Charles M. Rubin, written commun., 1984; Rubin, 1984; Hitzman and others, 1986	Stratiform, disseminated fine- to medium-grained pyrite, sphalerite, galena, chalcopyrite, and owyheeite in a quartz-calcite-pyrite matrix occur over a strike length of 1,000 m and widths of up to 60 m.  Deposit occurs on limb of recumbent, asymmetric antiform.  Host rocks:  a mafic and felsic metavolcanic sequence composed of quartz-muscovite-feldspar schist, quartz-chlorite-calcite phyllite, and porphyroclastic quartz-feldspar-muscovite schist; and an interlayered metasedimentary sequence composed of quartz-muscovite-chlorite phyllite, calc-schist, and marble.  Host rocks part of the Devonian and Mississippian Ambler sequence derived from bimodal calcic and calc-alkaline volcanic rocks and impure clastic and calcareous sedimentary rocks.  Deposit and host rocks subjected to greenschist-facies metamorphism.  Host rocks strike west-northwest, dip moderately south, and contain abundant south-dipping, tight to isoclinal folds.	Alaska

Q04-04	Arctic	Q	04	04	67 11 00N	156 22 00W	67.1833333333333	-156.366666666667	6711'N	15622'W	Kuroko massive sulfide	Zn, Cu, Pb, Ag, Au		37 million tonnes with 4.0% Cu, 5.5% Zn, 0.8% Pb, 47 g/t Ag, 0.62 g/t Au	Arctic	Wiltse, 1975; Sichermann and others, 1976; Hitzman and others, 1982; Schmidt, 1983; Jeanine Schmidt, written commun., 1984; Schmidt, 1986, 1988; Hitzman and others, 1986	Stratiform, semimassive to massive chalcopyrite and sphalerite with lesser pyrite, minor pyrrhotite, galena, tetrahedrite, arsenopyrite, and traces of bornite, magnetite, and hematite.  Deposit occurs in thick horizon with areal extent of about 900 by 1,050 m, and in two thinner horizons above main horizon.  Sulfides form multiple lenses up to 15 m thick over stratigraphic interval of 6 to 80 m.  Main horizon hosted in mainly graphitic pelitic schist and metarhyolite porphyry derived from submarine ash-flow tuff.  Host rocks part of the Devonian and Mississippian Ambler sequence.  Gangue mainly calcite, dolomite, barite, quartz, and mica.  Locally abundant chlorite, phlogopite-talc-barite, and pyrite-calcite-white mica occur in hydrothermally-altered wall rocks overlying, underlying, and interlayered with sulfide mineralization.  Alteration interpreted as occurring during rapid influx of cold seawater into a hot hydrothermal vent system.	Alaska

Q04-05	Ruby Creek, (Bornite)	Q	04	05	67 04 00N	156 59 00W	67.0666666666667	-156.983333333333	6704'N	15659'W	Kipushi Cu-Pb-Zn	Cu, Co, Zn, Ag		91 million tonnes grading 1.2% Cu; 4.2 million tonnes of up to 4% Cu	Arctic	Runnells, 1969; Sichermann and others, 1976; Hitzman and others, 1982; Hitzman, 1983; M.W. Hitzman, written commun., 1984; Bernstein and Cox, 1986; Hitzman, 1986	Strata-bound disseminated to massive chalcopyrite, bornite, chalcocite, pyrite, and minor sphalerite in brecciated dolomite and metamorphosed calcareous sedimentary rocks, part of the Devonian Bornite Marble (Hitzman and others, 1982).  Local sparse carrollite, chalcopyrite, reinerite, galena, pyrrhotite, and marcasite.  Large masses of dolomite breccia in matrix of dolomite, calcite, or fine-grained pyrite.  Matrix of pyrite breccia locally replaced by Cu-, Zn-, and Co-sulfides. Individual zoned sulfide bodies with interior containing bornite, chalcocite, and carrollite, middle containing bornite, and chalcopyrite, and exterior containing chalcopyrite, pyrite, and peripheral pyrite.  Hydrothermal mineralization extensive in dolostone bodies of biohermal and back-reef facies. Clasts of hydrothermal dolostone in breccias, possibly synsedimentary, indicate possible coeval mineralization and sedimentation.  Three major hydrothermal dolomite formation events. Subsequent intense polymetamorphism to greenschist facies, and broad folding.	Alaska

Q04-06	Asbestos Mountain	Q	04	06	67 01 00N	156 50 00W	67.0166666666667	-156.833333333333	6701'N	15650'W	Serpentine-hosted asbestos	Asbestos, jade, asbestos, talc		No data	Kobuk	Coats, 1944; Heide and others, 1949; Roeder and Mull, 1978; Loney and Himmelberg, 1985b	Serpentinite with veins of cross- and slip-fiber tremolite and chrysotile; small deposits of talc, soapstone, and nephrite.  About 35 tonnes tremolite mined from 1940 to 1945.  Probably source of nephrite jade boulders in Dahl Creek.  Part of dismembered Jurassic or older ophiolite, exposed discontinuously in klippe in the Jade Mountains-Cosmos Hills area, along the northern flank of Yukon-Koyukuk basin.	Alaska

Q04-07	Wheeler Creek	Q	04	07	66 16 00N	157 20 00W	66.2666666666667	-157.333333333333	6616'N	15720'W	Felsic plutonic U	U		Grab samples with up to 0.0125% U	Northwestern Koyukuk Basin	Eakins and Forbes, 1976; Miller, 1976; Jones, 1977	Uranothorianite and gummite in small, altered, smoky quartz-rich veinlets, and in altered areas in Late Cretaceous alaskite.  Deposit about 500 m long by 50 m wide.	Alaska

Q04-08	Clear Creek	Q	04	08	66 15 00N	156 03 00W	66.25	-156.05	6615'N	15603'W	Felsic plutonic U	U		Grab samples with up to 0.04% U, and 0.055% Th	Northwestern Koyukuk Basin	Eakin and Forbes, 1976; Miller, 1976; Jones, 1977	Uraniferous nepheline syenite and bostonite dikes in Late Cretaceous andesite.  Dikes within contact aureole of Late Cretaceous monzonite to granodiorite pluton of Zane Hills.	Alaska

Q04-09	Zane Hills	Q	04	09	66 12 10N	156 15 00W	66.2027777777778	-156.25	6612'N	15615'W	Felsic plutonic U	U, Th		Grab samples with up to 0.027% Th	Northwestern Koyukuk Basin	Eakin and Forbes, 1976; Miller, 1976; Jones, 1977; Miller and Elliott, 1977	Uranothorianite, betafite, uraninite, thorite, and allanite in veinlets in foliated monzonite border phase of the Late Cretaceous Zane Hills pluton.  Border phase grades to syenite; biotite-hornblende granodiorite in core of pluton.	Alaska

Q04-10	Quartz Creek	Q	04	10	65 30 00N	161 26 00W	65.5	-161.433333333333	6530'N	16126'W	Polymetallic vein	Pb, Zn, As, Ag		Up to 15% combined Pb and Zn, and 340 g/t Ag	Seward Peninsula	Miller and Elliott, 1969; Bundtzen and others, 1984	Disseminated to massive sulfides scattered over zone 3.2 to 8 km wide and over 29 km long in altered andesite and granite of Jurassic or Cretaceous age.  Mainly argentiferous galena, sphalerite, pyrite, and arsenopyrite.  Local realgar, orpiment, and tourmaline also present.  Considerable exploration, including drilling, in early 1970's.	Alaska

Q04-11	Perseverance	Q	04	11	64 45 00N	157 30 00W	64.75	-157.5	6445'N	15730'W	Polymetallic vein(?)	Pb, Ag, Sb		Produced 231 tonnes of ore with average grade of 73% Pb, and 124 g/t Ag.  	Southwestern Kuskokwim Mountains	Brian K. Jones, written commun., 1984	Coarse-grained galena, tetrahedrite, and traces of fibrous jamesonite in veins crosscutting bedding and schistosity of Paleozoic(?) chlorite-mica schist.  Gangue of dolomite and minor quartz.  Vein strikes northeast-southwest and dips southeast.  Oxidized zones of vein contain cerussite, azurite, malachite, and stibiconite(?).  Mined from 1920 to 1927, and 1981.  Age of deposit unknown.  	Alaska

Q04-12	Illinois Creek	Q	04	12	64 05 00N	158 00 00W	64.0833333333333	-158	6405'N	15800'W	Manto-replacement deposit (polymetallic Pn-Zn, Au)	Cu, Ag, Au, Pb, Zn		Contains 1.54 million tonnes grading, 2.4 g/tonne Au and 70 g/t Ag	Southwestern Kuskokwim Mountains	Gillerman, 1988; William W. Patton, Jr., written commun.; G. Booth, written commun., 1991	High-grade galena-sphalerite veins near contact between altered Cretaceous granite porphyry, and massive, pipe-like gossan in marble.  Most of the deposit was originally a massive sulfide body in Paleozoic quartzite, now completely oxidized.  Illinois Creek is one of 3 polymetallic gold-bearing gossans aligned along a 12 km long trend parallel to the Kaltag Fault, a major transcurrent fault in Western Alaska.  Most of the deposit is a completely oxidized massive sulfide body in Paleozoic quartzite.  Abundant sericite alteration in nearby granitic plutons which contain stockwork veinlets with chalcopyrite, galena, and detectable precious metals.  Other areas with epigenetic replacement, veins, and skarn with base-metal sulfides.  Area is poorly exposed.  The plutonic rocks intrude middle Paleozoic and older greenschist, quartzite, limestone, and orthogneiss.	Alaska

Q04-13	Kaiyuh Hills (Yuki River)	Q	04	13	64 10 00N	156 40 00W	64.1666666666667	-156.666666666667	6410'N	15640'W	Podiform Cr	Cr		Estimated 15,000 to 34,000 tonnes Cr2O3 in one deposit.  Largest deposit averages 60% Cr2O3 on surface	Yukon River	Loney and Himmelberg, 1984; Foley and others, 1984	Banded and disseminated chromite from 1 cm to 1 m thick in fresh and serpentinized Jurassic(?) dunite of Kaiyuh Hills ultramafic belt.  Dunite interlayered with harzburgite tectonite.  Largest deposit, 1 m by 100 m, consists of massive chromite with estimated 5,000 tonnes Cr2O3.  Lesser occurrences of banded nodular pods of chromite.  Metallurgical grade chromite with 46% Cr2O3 present.  Dunite and harzburgite tectonite faulted at base; interpreted as part of complexly deformed and dismembered ophiolite, part of Rampart ophiolite belt.	Alaska

Q05-01	Mount Igikpak and Arrigetch Peaks	Q	05	01	67 26 00N	154 07 00W	67.4333333333333	-154.116666666667	6726'N	15407'W	Polymetallic vein, Au quartz vein, Sn skarn, Cu-Pb-Zn skarn	Cu, Pb, Zn, Ag, Au, Sn, W, As		Grab samples with up to 55 g/t Au, 150 g/t Ag, >0.18% Sn, with commonly substantial Cu, Pb, Zn, and W values	Brooks Range	Grybeck and Nelson, 1981; Newberry and others, 1986	Numerous small polymetallic vein, Au quartz veins, and skarn deposits in metasedimentary rocks adjacent to schistose Devonian granitic plutons.  Wall rocks mainly Silurian and Devonian Skajit Limestone or older metasedimentary rocks.  Most common deposits are:  (1) quartz veins with varying amounts of galena, sphalerite, and chalcopyrite; (2) Sn skarns with disseminated cassiterite, magnetite, chalcopyrite, and arsenopyrite, in gangue of garnet, diopside, hornblende, clinozoisite, and idocrase; (3) Cu-Pb-Zn skarns with vein or sparse disseminated pyrrhotite, pyrite, chalcopyrite, galena, sphalerite, arsenopyrite, and fluorite with similar gangue as Sn skarns; and (4) areas of Fe-stained wall rocks with molybdenite and fluorite.  	Alaska

Q05-02	Ann, (Ernie Lake)	Q	05	02	67 25 00N	152 50 00W	67.4166666666667	-152.833333333333	6725'N	15250'W	Polymetallic vein (metamorphosed)	Pb, Zn, Ag		No data	Brooks Range	Grybeck, 1977; John T. Dillon, oral commun., 1986	Vein and stratabound massive galena with lesser sphalerite, bornite, chalcopyrite, and secondary malachite and azurite in marble, calc-schist, and pelitic schist.  Occurs in Late Proterozoic(?) banded schist and paragneiss.  Deposit occurs adjacent to the granite pluton of Ernie Lake, as do similar smaller occurrences nearby, around periphery of pluton.  Deposit may be polymetallic vein, or remobilized stratabound deposit.	Alaska

Q05-03	Michigan Creek	Q	05	03	67 19 00N	151 14 00W	67.3166666666667	-151.233333333333	6719'N	15114'W	Kuroko massive sulfide	As, Au, Ag, Cu, Zn, Pb		Grab samples with up to 8.2% As, 8.3 g/t Au, 3.9 g/t Ag, 0.14% Cu, 0.03% Zn, 0.014% Pb	Arctic	Dillon and others, 1981; William P. Brosge and John T. Dillon, oral commun., 1986	Disseminated to massive chalcopyrite and argentiferous galena in layers up to 0.1 m thick in felsic schist and in cross-cutting pyrite veins.  Occurs in felsic schist, marble, and phyllite of the Devonian and Mississippian Ambler sequence.	Alaska

Q05-04	BT, Jerri Creek	Q	05	04	67 08 00N	155 52 00W	67.1333333333333	-155.866666666667	6708'N	15552'W	Kuroko massive sulfide	Cu, Zn, Pb, Ag		BT:  3-4 million tonnes with 1.7% Cu, 2.6% Zn, 0.9% Pb, and 40 g/t Ag	Arctic	Hitzman, 1978, 1981; Hitzman and others, 1986	BT deposit:  disseminated to massive pyrite, chalcopyrite, sphalerite, galena, and gossan in layers 5 to 12 cm thick.  Sparse tennantite and possible enargite.  Gangue is quartz, muscovite, and barium feldspar.  No vertical zonation.  Hosted in Devonian and Mississippian pelitic schist, calc-schist, and metarhyolite ("button") schist, part of the Ambler sequence.  Strike length of 2,000 m; average width of 1.5 m.  Layering strikes east-west and dips 50 to 70 south.  Similar occurrences in zone up to 10 km long to west, along same stratigraphic horizon.  Jerri Creek deposit:  Mainly disseminated and sparse massive pyrite, sphalerite, and minor chalcopyrite in layers up to 2 cm thick.  Hosted in muscovite-quartz schist, actinolite-garnet-quartz schist, and marble adjacent to metarhyolite, all part of the Devonian and Mississippian Ambler sequence.  Strike length of 20 km.	Alaska

Q05-05	Sun, (Picnic Creek)	Q	05	05	67 04 00N	155 01 00W	67.0666666666667	-155.016666666667	6704'N	15501'W	Kuroko massive sulfide	Cu, Zn, Pb, Ag, Au		Average grade of 1 to 4% Pb, 6 to 12% Zn, 0.5 to 7% Cu, 103 to 343 g/t Ag.  Single quartz-barite bed with 685 to 1,029 g/t Ag. Less than 3 million tonnes ore determined by drilling.  	Arctic	Zdepski, 1980; Christopher D. Maars, written commun., 1984; Hitzman and others, 1986	Stratiform, disseminated to massive sphalerite, chalcopyrite, galena, and argentiferous tetrahedrite with pyrite, arsenopyrite, and barite.  Deposit occurs in at least three horizons.  Upper horizon is Zn-Pb-Ag rich; middle is mainly Cu-rich; and lower is Cu-Zn rich.  Host rock is metarhyolite, muscovite-quartz-feldspar schist, micaceous calc-schist, marble, and greenstone, all part of the Devonian and Mississippian Ambler sequence.  Host rocks generally strike northeast and dip moderately southeast.  Locally well-developed layering in metarhyolite may represent original bedding in tuff protolith.  Bulk of sulfides in felsic schist; thin concordant beds of sulfides in metarhyolite.  Small- and large-scale isoclinal folds in host rocks and sulfide layers.	Alaska

Q05-06	Roosevelt Creek	Q	05	06	67 10 00N	152 30 00W	67.1666666666667	-152.5	6710'N	15230'W	Kuroko massive sulfide	Cu, Zn, Pb, Ag, Au		No data	Arctic	Grybeck, 1977; William P. Brosge and John T. Dillon, oral commun., 1986	Disseminated(?) and massive sulfides, probably mainly chalcopyrite, sphalerite, and galena, in metavolcanic rocks and pelitic schist and marble of the Devonian and Mississippian Ambler sequence.	Alaska

Q05-07	Caribou Mountain, Lower Kanuti River, Holonada	Q	05	07	66 05 00N	150 55 00W	66.0833333333333	-150.916666666667	6605'N	15055'W	Podiform Cr	Cr		Estimated 2,300 tonnes Cr2O3 at Caribou Mountain, 730 tonnes at Lower Kanuti River, and up to 25,000 tonnes at Holonada	Yukon River	Patton and others, 1976; Foley and McDermott, 1983; Foley and others, 1985; Loney and Himmelberg, 1985a	Elongate belt over 100 km long contains podiform Cr deposits in Jurassic or older dunite and peridotite tectonite.  Largest deposits are at Caribou Mountain, lower Kanuti River, and Holonada.  Caribou Mountain:  ten chromite occurrences; three containing bands of massive chromite, and magnesian chromohercynite in layers up to 3 m thick and 20 m long.  Lower Kanuti River:  one layer about 1.5 m wide and at least 25 m long with high-chromium chromite contains 7.5% Cr2O3.  Holonada:  ten occurrences of bands of disseminated to massive chromite several meters thick and long.  One occurrence 1.5 to 3 m thick with exposed strike length of 130 m, with average grade of 20% Cr2O3.  Four other occurrences with about 1,000 tonnes averaging 4% to 8% Cr2O3.  Deposits at all three areas interpreted as part of complexly deformed and disrupted ophiolite, part of Yukon-Koyukuk ophiolite belt.	Alaska

Q05-08	Bonanza Creek	Q	05	08	66 37 00N	150 01 00W	66.6166666666667	-150.016666666667	6637'N	15001'W	W skarn	W, Ag, Cu		Grab samples with up to 0.89% W, 300 g/t Ag, 0.65%Cu	Northeastern Koyukuk River	Clautice, 1980	Scheelite, chalcopyrite, and pyrrhotite in skarn adjacent to intrusive contact with biotite granite pluton.  Scheelite occurs mainly as sparse disseminated grains, associated with very sparse sulfides in garnet-pyroxene skarn and on fracture surfaces in calc-silicate schist.  Local limonite staining.  Local quartz-scheelite veins in calc-silicate schist, and quartz-molybdenite veins in biotite granite.  Granite pluton part of the Kanuti batholith with K-Ar age of 90.6 Ma.  Wall rocks include middle Paleozoic or older pelitic schist, quartz-mica schist, quartz-feldspar schist, quartzite, and calcareous quartz-mica schist.  Deposit associated with marble layer, about 15 m thick, interlayered with pelitic schist.  Exploration limited to several trenches.  	Alaska

Q05-09	Upper Kanuti River	Q	05	09	66 30 00N	150 10 00W	66.5	-150.166666666667	6630'N	15010'W	Polymetallic or epithermal vein	Pb, Zn, Ag		Grab samples with  up to 2% Pb, 0.3% Zn, and 30 g/t  Ag	Northeastern Koyukuk River	Patton and Miller, 1970	Disseminated pyrite, galena, and sphalerite in masses up to 5 mm in diameter occur in extensive altered gossan zone about 100 m long in silicified, locally brecciated, early Tertiary rhyolite porphyry.  Rhyolite caps and probably intrudes a Cretaceous pluton of the Kanuti batholith.  	Alaska

Q05-10	Avnet (Buzby)	Q	05	10	65 16 00N	150 25 00W	65.2666666666667	-150.416666666667	6516'N	15025'W	Mn-Ag vein	Mn, Ag		Grab samples contain 0.6 to 34% Mn and up to 9.6 g/t Ag	East-Central Alaska	Thomas, 1965	Irregular masses of psilomelane up to almost 8 cm long occur in latticework of thin seams of quartz, and as thin surface coatings on fractured lower and middle Paleozoic chert, quartzite, limestone, dolomite, and greenstone.  Exploration consists of one trench and two pits.  	Alaska

Q05-11	Hot Springs Dome	Q	05	11	65 02 00N	150 45 00W	65.0333333333333	-150.75	6502'N	15045'W	Polymetallic vein	Pb, Ag, Zn, Au	Cu, Co	Grab samples contain about 5.8 g/t Au, up to 274 g/t Ag, 3.7% Pb, and 0.32% Zn	East-Central Alaska	Maloney, 1971	Six, east-west-striking veins, possibly in shear zones, in contact-metamorphosed argillite, graywacke, conglomerate, and minor conglomerate; part of Jurassic and Cretaceous flysch sequence.  Veins at surface contain galena coated with anglesite and limonite.  At depth, veins also contain siderite, copper carbonates, chalcopyrite, pyrrhotite, pyrite, and erythrite.  Zone up to 600 m long and 9 m wide.  Numerous quartz veinlets.  Deposit occurs at contact with early Tertiary biotite granite.  Exploration consists of three shallow shafts.  	Alaska

Q05-12	Beaver Creek	Q	05	12	64 45 00N	155 30 00W	64.75	-155.5	6445'N	15530'W	Polymetallic vein	Ag, Pb, Zn		Estimated 14,000 tonnes grading 103 g/t Ag, 0.8% Zn and 0.5% Cu; additional 19,000 tonnes grading 26.1 g/t Ag, 4.2% Pb, 0.16% Zn, 0.2% Cu	Southwestern Kuskokwim Mountains	Brown, 1926; Thomas, 1963; Brian K. Jones, written commun., 1984	Highly oxidized zones with limonite, goethite, argentiferous galena, quartz, and sphalerite; surface occurrences of massive galena and limonite-cerussite gossan.  Two zones occur for 300 m along strike, and range from 2.5 to 5 m thick.  Zones separated by fractured schist and marble occur in middle Paleozoic(?) muscovite schist trending northeast-southwest and dipping steeply northwest.  Deposition of sulfides controlled by metamorphic structures in  host rocks.  Age of deposit unknown.	Alaska

Q05-13	Zane Hill	Q	05	13	66 38 00N	155 55 00W	66.6333333333333	-155.916666666667	6638'N	15555'W	Porphyry Cu-Au	Cu, Au		Contains up to 2.0% Cu, 0.2% Mo, and 2.4 g/t Au.	West-Central Alaska	Miller and Ferrians, 1968; Hollister, 1978; Nokleberg and others, 1995a.	Consists of a stockwork and veins containing chalcopyrite, pyrite, trace molybdenite, and covellite most commonly in a quartz gangue. The stockwork and veins occur in a small monzonite porphyry, exposed over a 5 km2 area, that intrudes older Jurassic andesite, and also in mid-Cretaceous granodiorite. The stockwork and veins occurs in both the Jurassic andesite and in the monzonite porphyry that has K-Ar age of 81 Ma. Like the deposits at Indian and Purcell Mountains, the phyllic-argillic-propylitic alteration assemblage that is annularly distributed around the core of the monzonite porphyry. The Zane Hills deposit occurs about 4 km west of the Hog River placer deposit that has yielded about 6,842 kg of placer gold.	Alaska

Q05-14	Indian Mountain and Purcell Mountain	Q	05	14	66 22 00N	155 02 00W	66.3666666666667	-155.033333333333	6622'N	15502'W	Porphyry Cu-Au	Cu, Au		Indian Mountain: Limited analyses range from 0.07 to 0.15% g/t Cu and 0.1 to 1.5 g/t Au. Purcell Mountain: Contains 0.07 to 0.10% Cu but no gold. Placer gold has been commercially recovered from streams draining plutons in area.	West-Central Alaska	Miller and Ferrians, 1968; Hollister, 1978; Nokleberg and others, 1995a.	Indian Mountain: Consists mainly of tourmaline-bearing breccias with chalcopyrite. Surrounding the breccias are concentric phyllic-argillic-propylitic alteration halos. The halos surround the central parts of a quartz monzonite porphyry intrusion with a size of about 10 km2. A pyrite halo rims the intrusion outboard of the intrusion. Barite, galena, and sphalerite have also been identified at the prospect.  Purcell Mountain: Consists of a porphyry copper deposit consists of stockwork veins with chalcopyrite that are also associated with the concentric phyllic-argillic-propylitic alteration halos. The halos surround the central part of a quartz monzonite porphyry intrusion with a size of about 12 km2. A pyrite halo also rims the intrusion. 	Alaska

Q06-01	Jim-Montana	Q	06	01	67 45 00N	149 05 00W	67.75	-149.083333333333	6745'N	14905'W	Cu-Zn skarn	Cu, Zn, Ag, Pb		No data	Brooks Range	Grybeck, 1977; DeYoung, 1978	Disseminated chalcopyrite, sphalerite, with minor galena, tennantite, and malachite stain in skarn developed in marble of the Silurian and Devonian Skajit Limestone.	Alaska

Q06-02	Sukakpak Mountain	Q	06	02	67 36 00N	149 50 00W	67.6	-149.833333333333	6736'N	14950'W	Sb-Au vein	Au, Sb, Mo	Hg	Grab samples with up to 560 g/t Au, 4.5 g/t Ag, 54% Sb, 1.7% Mo, and 0.50% Hg	Brooks Range	Dillon, 1982	Disseminated stibnite, with sparse cinnabar, gold, and molybdenite(?) in three calcite-stibnite quartz veins along a high-angle fault that cuts Devonian marble, dolomite, graphitic and calcareous quartz schist.  Stibnite forms up to 60 percent of vein.  Zone of veins extends for about 1 km with maximum zone width about 100 m.  Local slickensides and boudins in veins suggest emplacement during movement on fault. 	Alaska

Q06-03	Victor, Venus, Evelyn Lee, and Ebo	Q	06	03	67 38 00N	149 20 00W	67.6333333333333	-149.333333333333	6738'N	14920'W	Porphyry Cu and Cu skarn	Cu, Ag, Mo		Zones in granitic rocks up to 30 m wide contain up to 0.4% Cu.  Grab samples of skarn contain up to 5.5% Cu, 0.41 g/t Au, and 0.29 g/t Ag	Brooks Range	DeYoung, 1978; Donald Grybeck, written commun., 1984; Newberry and others, 1986	Veinlet and disseminated chalcopyrite, bornite, molybdenite, and pyrite in schistose Devonian granodiorite porphyry intruding Silurian and Devonian Skajit Limestone or older marble, calc-schist, and pelitic schist.  Skarn in marble adjacent to plutons contain vugs with interstitial bornite, chalcopyrite, bornite, chalcocite, pyrite, magnetite, and some digenite.  Skarn consists mainly of garnet, magnetite, diopside, and retrograde vein and replacement epidote, amphibole, chlorite, calcite, and quartz.  Skarns were subsequently regionally metamorphosed.  	Alaska

Q06-04	Geroe Creek	Q	06	04	67 41 00N	148 49 00W	67.6833333333333	-148.816666666667	6741'N	14849'W	Porphyry Cu-Mo	Cu, Mo		Zones in plutons up to several m thick with up to 0.6% Cu, 0.02% Mo, and 0.1 g/t Au.	Brooks Range	DeYoung, 1978; Newberry and others, 1986	Veinlet, stockwork, and disseminated molybdenite, chalcopyrite, and pyrite with quartz, sericite, and chlorite in the Devonian Horace Mountain and Baby Creek plutons composed of metaluminous biotite-hornblende granite with local porphyritic phases.  Wall rocks mainly the Silurian and Devonian Skajit Limestone and older calcareous metasedimentary rocks.	Alaska

Q06-05	Chandalar district (Mikado, Little Squaw)	Q	06	05	67 32 00N	148 15 00W	67.5333333333333	-148.25	6732'N	14815'W	Au quartz vein	Au		12,000 tonnes with 75 g/t Au at Mikado and Little Squaw mine.  Estimated 45,000 tonnes grading 80 g/t Au for district	Southern Brooks Range	Chipp, 1970; DeYoung, 1978; Dillon, 1982; Ashworth, 1983; John T. Dillon, oral commun., 1986; Rose and others, 1988	Scattered, minor arsenopyrite, galena, sphalerite, stibnite, and pyrite with gold in several quartz veins up to 3 m thick in a zone about 4.0 km long and 1.6 km wide.  Veins occur along steeply dipping normal faults in Devonian or older quartz-muscovite schist, phyllite, and quartzite.  Veins interpreted to have been emplaced during fault movement.  More than 1,000 m of underground workings at Little Squaw and Mikado mines.  Minor production and several episodes of exploration activity, notably during the 1920's and 1960's.  	Alaska

Q06-06	Sawtooth Mountain	Q	06	06	65 23 00N	149 30 00W	65.3833333333333	-149.5	6523'N	14930'W	Sb-Au vein	Sb	Au, Ag	Grab samples from dump contains up to 46.2% Sb, 0.7 g/t Au, and 15.1 g/t Ag.  Produced about 590 tonnes with 58% Sb2S3 through 1970	East-Central Alaska	R.M. Chapman, written commun., 1985	Massive stibnite in a vertical cylindrical lens about 3 m wide.  Hosted in argillite of Late Jurassic or Early Cretaceous flysch near contact with Cretaceous granite with K-Ar age of 88.3 Ma.  One shaft about 30 m deep.  Most production occurred during Korean War.  Minor production in 1970 and 1985.  	Alaska

Q06-07	Gertrude Creek, Griffen, Ruth Creek	Q	06	07	65 31 00N	148 30 00W	65.5166666666667	-148.5	6531'N	14830'W	Sb-Au vein	Au, Sb	Ag, Pb	Grab samples with up to 15% Sb and 3.9 g/t Au	East-Central Alaska	Foster, 1968a, b; Allegro, 1984a	Quartz stringers up to 8 cm wide with pyrite, arsenopyrite, stibnite, and gold in altered diorite and silica-carbonate rock that consists of dolomite, calcite, and quartz.  Hosted in middle Paleozoic greenstone, slate, calc-schist, and Cretaceous monzonite.  Mineralized quartz stringers also in shear zone adjacent to serpentinite.  Exploration limited to short adit and a few pits scattered across Amy Dome area.	Alaska

Q06-08	Hudson Cinnabar	Q	06	08	65 30 00N	148 22 00W	65.5	-148.366666666667	6530'N	14822'W	Hg quartz vein	Hg		Possibly minor Hg produced	East-Central Alaska	Robinson and others, 1982	Cinnabar in disseminations and quartz veins in altered Late Cretaceous to early Tertiary granite dikes and plutons intruding Ordovician to Devonian siltstone and argillite.  Minor exploration over years but long dormant.  	Alaska

Q06-09	Lime Peak	Q	06	09	65 37 00N	146 43 00W	65.6166666666667	-146.716666666667	6537'N	14643'W	Sn greisen and Sn vein	Sn, Ag, Zn, U, W		Grab samples with up to 0.16% Sn, 0.5% Cu, 0.2% Pb, 1.8%  Zn, 14 g/t Ag.  Estimate 50% probability of 320,000 tonnes of Sn and 10 million ounces Ag	East-Central Alaska	Menzie and others, 1983; Burton and others, 1985; W. David Menzie, written commun., 1985; Smith and others, 1987	Areas of veinlets, breccia zones, and pods of black tourmaline, and areas of chlorite, sericite, green tourmaline, and quartz alteration in early Tertiary hypabyssal, peraluminous, biotite granite pluton.  Granite pluton cut by numerous felsic and minor intermediate dikes.  Veins up to 0.5 m wide.  Areas of veinlets, breccia zones, and tourmaline pods interpreted as deuteric alteration; areas of chlorite, sericite, and quartz interpreted as hydrothermal alteration.  Anomalous high values of Sn and associated pathfinder elements (Ag, B, Bi, Mo, Pb, Zn) found in rock samples from and around pluton.  Rare fluorite, topaz, pyrite, chalcopyrite, and molybdenite in altered areas.  Placer cassiterite in surrounding area.  Two main phases to pluton:  older coarse-grained equigranular biotite granite; younger porphyritic biotite granite with fine-grained groundmass.  Local miarolitic cavities in pluton.  K-Ar ages of 57-66 Ma for granite associated with mineralization; intruding Cambrian(?) sandstone, shale, slate.	Alaska

Q06-10	Roy Creek (former Mount Prindle)	Q	06	10	65 29 00N	147 05 00W	65.4833333333333	-147.083333333333	6529'N	14705'W	Felsic plutonic U	U, Th		Drill core with up to 5 to 10% REE by volume	East-Central Alaska	Burton, 1981	Thin veins with allanite, bastnaesite, monazite, thorianite, thorite, uraninite, and xenotime cut Cretaceous porphyritic biotite syenite and alkali granite.  Deposit contains significant La, Ce, Nd, Pr, Y, and fluorite.  Marked by hematitic alteration of wall rocks and leaching of magnetite in host rocks.  Deposit and granitic rocks occur about 25 km west of Mount Prindle and intrude Cambrian(?) sandstone, quartzite, argillite, and chert.  	Alaska

Q06-11	Dempsey Pup	Q	06	11	65 21 00N	146 33 00W	65.35	-146.55	6521'N	14633'W	Sb-Au vein or polymetallic vein(?)	Sb, Au(?)		Grab samples with up to 28% Sb.  Produced a few hundred tonnes of low-grade ore. 	East-Central Alaska	Killeen and Mertie, 1951	Quartz vein with small lenses and stringers of stibnite and possibly gold.  Hosted in middle Paleozoic or older quartz schist, mica schist, and marble of Yukon-Tanana terrane.  Several short tunnels. 	Alaska

Q06-12	Table Mountain	Q	06	12	65 29 00N	145 53 00W	65.4833333333333	-145.883333333333	6529'N	14553'W	Sn polymetallic vein	Au	Sn, Be, W	Grab samples with up to 140 g/t Au and 0.15% Be	East-Central Alaska	Burack, 1983; Foster and others, 1983; W. David Menzie, written commun., 1985; Newberry and Burns, 1988	A variety of types of deposits, all(?) associated with felsic igneous rocks.  Pyrrhotite, arsenopyrite, minor chalcopyrite, rare enargite and sphalerite, and high Au values occur in black biotite schist and in quartz veins adjacent to fault zone intruded by a hypabyssal felsic dike.  About 5 km northeast, low Au values in felsic dikes and in country rocks adjacent to an early Tertiary granite pluton, and in felsic dikes in the granite.  Granite pluton crops out over 2 km2 area.  Granite and adjacent biotite schist contain high Be values.  Small skarns with high W-Au values.  Local quartz-tourmaline veins with pyrrhotite, arsenopyrite, scheelite, stibnite, and carbonate veins.	Alaska

Q06-13	Miller House	Q	06	13	65 33 00N	145 15 00W	65.55	-145.25	6533'N	14515'W	Au-As polymetallic vein	Au		Grab samples with up to 3.9 g/t Au	East-Central Alaska	Tripp and others, 1982; Menzie and others, 1983	Massive to disseminated arsenopyrite in four large and four small, iron-stained shear zones over 150 m long that cut mid-Paleozoic or older schist of Yukon-Tanana terrane.  Intense alteration along zones.  Possibly Early Tertiary age interpreted for deposit.	Alaska

Q06-14	Ketchem Dome	Q	06	14	65 29 00N	144 52 30W	65.4833333333333	-144.875	6529'N	14453'W	Sn greisen	Sn		Grab samples with up to  0.51% Sn	East-Central Alaska	Foster and others, 1983; Menzie and others, 1983; W. David Menzie, written commun., 1984	Greisen zones, up to 4 cm wide, and quartz veins in intensely altered, chloritic breccia along northern margin of the multi-phase early Tertiary, Circle (granite) pluton (K-Ar age of 60.5 Ma).  Pluton intrudes mid-Paleozoic or older schist of the Yukon-Tanana terrane.  Limited exploration in 1978 and 1981.	Alaska

Q06-15	Bedrock Creek	Q	06	15	65 27 00N	144 50 00W	65.45	-144.833333333333	6527'N	14450'W	Porphyry Cu(?)	Cu, W, Th		No data	East-Central Alaska	Nelson and others, 1954	Disseminated monazite with minor scheelite, pyrrhotite, garnet, ilmenite, zircon, biotite, topaz, and malachite in early Tertiary granite of the Circle pluton (K-Ar age of 60.5 Ma).  Pluton intrudes middle Paleozoic or older schist of Yukon-Tanana terrane. 	Alaska

Q06-16	Salcha River	Q	06	16	65 07 00N	144 38 00W	65.1166666666667	-144.633333333333	6507'N	14438'W	W skarn	W		No data	East-Central Alaska	Foster and others, 1983; Menzie and others, 1983; W. David Menzie, written commun., 1984	Scheelite occurs in discontinuous idocrase-garnet skarn, in layered calc-silicate schist, and in impure marble along contact with early Tertiary granite pluton.  Schist and marble part of mid-Paleozoic or older Yukon-Tanana terrane.	Alaska

Q06-17	Fort Knox	Q	06	17	65 07 00N	147 23 00W	65.1166666666667	-147.383333333333	6507'N	14723'W	Granitoid-related gold	Au, Ag, Mo	Bi	153,8 million tonnes grading 0.82 g/t Au	East-Central Alaska	Robinson and others, 1990; Arne Bakke, written commun., 1991; Bakke, 1995; Bundtzen and others, 1996.	Free gold, bismuthinite, and minor to trace molybdenite and chalcopyrite in sulfide-poor, quartz vein stockwork.  Gold is remarkable pure (980 fine) which is extremely unusual.  Mineralization hosted in porphyritic granodiorite and preferentially emplaced along a steeply dipping fracture system trending North 70 degrees West.  Deposit is at least 1500 meters long, 300 meters wide, and 250 meters deep and open ended at depth.  Chemically, the Fort Knox pluton, which hosts the mineralization, is alkali-calcic and peraluminous.  Mineralization may have occurred during late stages of emplacement of the nearby Gilmore Dome stock which is radiometrically dated at 92 Ma, or alternatively, during a younger heating event that post-dates early Mo-Bi mineralization.  	Alaska

Q06-18	Cleary Summit (Flanks of Pedro Dome)	Q	06	18	65 04 00N	147 25 00W	65.0666666666667	-147.416666666667	6504'N	14725'W	Polymetallic vein, Au-quartz vein	Au, Ag	Pb, Zn, Sb, As, W, Sn	Total production estimated as 145,000 tonnes containing 10 to 55 g/t Au. True north deposit with 6.24 milion tonnes grading 2.23 g/t Au.	East-Central Alaska	Chapman and Foster, 1969; Metz and Halls, 1981; Smith and others, 1981;  Newberry and Burns, 1988; Robinson and others, 1990; Metz, 1991; Buntzen and others, 1996.	Quartz fissure veins from a few centimeters to a few meters thick with various proportions of gold, boulangerite, jamesonite, galena, stibnite, pyrite, arsenopyrite, tetrahedrite, and minor scheelite.  Most productive veins strike northwest-southeast and dip variably to south.  Cleary summit region includes 78 known lode occurrences, 30 with production.  Veins in interlayered mica quartzite, graphitic schist, pelitic schist, chlorite-actinolite greenschist, calc-schist, and marble of the upper Precambrian(?) Cleary sequence, part of the mid-Paleozoic or older Yukon-Tanana terrane.  Several theories of origin have been proposed.  The older is that the veins are related to Cretaceous intermediate composition plutons, several of which are exposed or are proposed under the Cleary anticline.  More recently, several workers have proposed that the metals and the veins were remobilized from the Cleary Sequence.  The veins are the source of rich placers in creeks that drain the area.  Several periods of active mining, mostly before 1941.  The largest producers were the Cleary Hill and Hi-Yu mines.  Persistent, though somewhat erratic, exploration since before World War I, including several major exploration projects in the 1980's.  	Alaska

Q06-19	Stepovich Lode	Q	06	19	64 59 00N	147 21 00W	64.9833333333333	-147.35	6459'N	14721'W	W skarn	W, Au		Estimated 20,000 tonnes grading 0.5 to 3.6% WO3.  Produced about 4,000 units WO3	East-Central Alaska	Byers, 1957; Metz and Halls, 1981; Robinson, 1981; Allegro, 1984b; Robinson and others, 1990; Metz, 1991	Scheelite in layered skarn, or locally in zoned veins crosscutting skarn.  Skarn types include scheelite-amphibole-quartz-calcite, pyroxene-garnet-scheelite, and quartz-amphibole-calcite-scheelite varieties.  District includes 15 known lode tungsten prospects, four with significant production.  Skarns form discontinuous bodies near, and at contact with the Gilmore Dome (granite) pluton of Late Cretaceous age.  Deposit occurs in calc-schist and marble of the Cleary sequence and in interlayered amphibolite, all part of the middle Paleozoic or older Yukon-Tanana terrane.  Includes Spruce Hen, Yellow Pup, and Stepovitch mines.  Production between 1916-1919, 1941-1945, and 1951-1955.	Alaska

Q06-20	Scrafford	Q	06	20	65 00 00N	147 49 00W	65	-147.816666666667	6500'N	14749'W	Sb-Au vein	Sb, Au		Footwall chip samples contain 1.4 to 5.7 g/t Au.  Produced 906,000 kg Sb from 2,500 tonnes ore, averaging 36% Sb.  	East-Central Alaska	Chapin, 1914, 1919; Metz and Halls, 1981; Robinson and Bundtzen, 1982; Thomas E. Smith and Paul A. Metz, written commun., 1984; Metz, 1991	Massive stibnite along east-west-striking shear zone.  Also disseminated quartz stockwork and veinlets with arsenopyrite and stibnite in feldspathic quartzite and quartz mica schist in footwall of shear zone.  Barren pelitic schist and quartzite in hanging wall.  Host rocks part of the upper Precambrian(?) Cleary sequence, part of the mid-Paleozoic or older Yukon-Tanana terrane.  Several periods of active mining when Sb prices have been high.  	Alaska

Q06-21	Ester Dome	Q	06	21	64 52 00N	148 05 00W	64.8666666666667	-148.083333333333	6452'N	14805'W	Polymetallic vein(?)	Au, Ag		Produced 194,000 tonnes of ore with average grade of 3.0 to 80.0 g/t Au	East-Central Alaska	Hill, 1933; Thomas, 1973; R.C. Burggraf, written commun., 1989, Robinson and others, 1990; Bundtzen and others, 1996.	Quartz fissure veins from a few centimeters to 5.5 m thick and up to 1,200 m long with gold, pyrite, arsenopyrite, and stibnite, and minor jamesonite, argentite, chalcocite, and covellite.  Area includes 58 known lode occurrences, 27 with production.  The largest deposits include Ryan Lode and the Grant and Mohawk deposits.  Steeply dipping quartz veins up to a few meters thick most common; local sheared veins up to 22 m thick.  Multiple episodes of quartz deposition.  Veins occur in micaceous quartzite, graphitic schist, calc-schist, and marble of mid-Paleozoic or older Yukon-Tanana terrane.  About 26 producing vein deposits in area.  The Silver Dollar and Mohawk deposits contain an estimated 900,000 tonnes grading 3.0 g/tonne Au and 6.0 g/tonne Ag.  Grant deposit has estimated 192,300 tonnes grading 12.0 g/t Au.  Ryan Lode deposit has estimated 13.2 million tonnes grading 1.95 g/t Au.  Several periods of production, notably in the 1930's and the 1980's.  The most prominent properties are the Ryan Lode and the Grant mine; both of which are currently active.  Ester Dome undoubtedly is the source for some of the rich placers located radially around it.  	Alaska

Q06-22	Liberty Bell	Q	06	22	64 37 00N	148 51 00W	64.6166666666667	-148.85	6437'N	14851'W	Kuroko massive sulfide(?) or polymetallic gold vein	Au, Ag, Cu, Bi		Estimated 91,000 tonnes with 34.3 g/t Au, 10% As, 2.0% Cu	Alaska Range and Yukon-Tanana Upland	Hawley, 1976; E.R. Pilgram, written commun., 1976; Gilbert and Bundtzen, 1979; Bundtzen and Gilbert, 1983; Thomas K. Bundtzen, written commun., 1985, 1989	Fine-grained arsenopyrite, chalcopyrite, pyrrhotite, and bismuthite in stringers and laminations that occur parallel to foliation.  The sulfide zone reaches a maximum thickness of 10 m and is 200 m long.  Layering ranges from a few centimeters to 1 m thick.  Lenses and laminations parallel foliation in siliceous metavolcanic phyllite of the California Creek Member of the Mississippian(?) Totatlanika Schist, but are locally folded.  Quartz-tourmaline-sulfide veins, locally with symmetrical wall rock alteration, are from 10 cm to 1 m thick and crosscut sulfide zones and adjacent schist.  The sulfides occur immediately adjacent to a metamorphosed porphyry interpreted as a Paleozoic igneous plug that was contemporaneous with the volcanic rock protoliths of the Totatlanika Schist.  White mica from plug yields K-Ar age of 90 Ma, which indicates the age of a regional metamorphic event in the Yukon-Tanana terrane.  Quartz veins may represent either remobilized stratiform sulfides, or polymetallic veins associated with nearby Tertiary(?) plutonic rocks.  Gold produced in 1930's. 	Alaska

Q06-23	Democrat (Mitchell Lode)	Q	06	23	64 20 00N	146 22 00W	64.3333333333333	-146.366666666667	6420'N	14622'W	Granitoid-related gold	Au, Ag, Pb, Sb		1989 test output of 88,000 tonnes grading 2.2 g/t Au; 5.0 g/t Ag	East-Central Alaska	Bundtzen and Reger, 1977; T.K.  Bundtzen and R.B. Forbes, written commun., 1990	Tetrahedrite, galena, acanthite, owyheeite, and other silver sulfosalts, and free gold with quartz in hydrothermally altered granite porphyry.  Granite yields K-Ar age of 89 Ma.  Strong sericite alteration halo surrounds stock, which intrudes sillimanite bearing schists of Yukon-Tanana terrane.  Granite porphyry is part of 35 km long sill complex that intrudes along Richardson Lineament.  Gold bullion occurs as interlocking alloys of native silver and high fineness gold that averages 67% gold and 33% silver.  Silver sulfosalts locally abundant with 'bonanza' grades of up to 66,000 g/tonne silver obtained in localized mineral zones.  Mineralization believed to have formed during high level emplacement of granite porphyry along Richardson Lineament.	Alaska

Q06-24	Blue Lead, Tibbs Creek, Gray Lead	Q	06	24	64 20 00N	144 14 00W	64.3333333333333	-144.233333333333	6420'N	14414'W	Polymetallic vein or Sb-Au vein	Au, Ag, Sb		Produced 905 g Au and 707 g Ag from 136 tonnes ore	East-Central Alaska	Thomas, 1970; Menzie and Foster, 1978; Robinson and others, 1982	Group of quartz veins with gold, pyrite, arsenopyrite, and stibnite.  Veins pinch and swell; width ranges from 1 cm to 2.4 m, with average of 1 m.  Masses of nearly pure stibnite up to 0.6 m thick and 30 m long.  Veins occur in Cretaceous(?) granitic rocks intruding mid-Paleozoic or older metasedimentary rocks of the Yukon-Tanana terrane.  Abundant faults and shear zones.  About 240 m underground workings.  Explored from about 1935 to 1941.  Minor production in 1970's.	Alaska

Q07-01	Alto	Q	07	01	66 32 00N	140 17 00W	66.5333333333333	-140.283333333333	6632'N	14017'W	Stratabound Fe	Fe		Medium.  Reserves of 50 million tonnes grading 55% Fe.	Fish River	Norris, 1976; Yukon Minfile, 1987.	Consists of oolitic magnetite that occurs in a 45 meter-thick bed that is exposed along a strike length of 350 meters. Bed part of recessive weathering black shales about 50 meters above the base of the Jurassic and Lower Cretaceous Kingak Formation.  Deposit age interpreted as Permian. 	Canada

Q07-02	Rusty Springs (Termuende)	Q	07	02	66 30 00N	140 20 00W	66.5	-140.333333333333	6630'N	14020'W	Southeast Missouri Zn-Pb-Ag	Ag, Zn, Cu	Pb, Ba	Medium?	Northern Cordilleran	Yukon Minfile, 1987.	Consists of sphalerite, tetrahedrite and pyrite, and  minor galena that occur in vugs, quartz-calcite veinlets and as widespread massive sulfide lenses. Deposit hosted in brecciated dolomite and shale of the Middle Devonian Ogilvie Formation near the core of an anticline.  Most of deposit occurs in previously altered, vuggy dolomitized limestone, approximately 100 meters thick, that is crudely localized near a contact with unconformably overlying slates of the Mississippian Hart River Formation.  Deposit age interpreted as Middle Devonian.	Canada

Q07-03	Three Castle Mountain	Q	07	03	65 11 30N	141 10 35W	65.1916666666667	-141.176388888889	6512'N	14111'W	Sedimentary exhalative Pb-Zn	Pb, Zn	Ba	Up to 17% Zn and 2% Pb in 3 separate deposits.	Unassigned	Brabb and Churkin, 1969; Bundtzen and others, 1982; T.K.Bundtzen, written commun., 1992	Disseminated to massive galena, sphalerite, and barite in middle to lower Upper Devonian chert, shale, and limestone of the McCann Hill chert of the North American craton margin.  Area includes least three prospects:  Three Castle Mountain, Pleasant Creek, and VABM Casca; other occurrences are also known.  Sulfides and barite occur as disseminated to massive layers 3 to 100 cm thick in mudstone. Also occurring locally are coarser grained, sphalerite-dominated masses in carbonate breccia.  Deposits interpreted as a sedimentary-exhalative deposit similar to middle Paleozoic deposits in western Brooks Ranges or in the western Alaska Range, such as the Gagaryah deposit.	Alaska

Q07-04	Eagle C3	Q	07	04	64 34 00N	142 11 00W	64.5666666666667	-142.183333333333	6434'N	14211'W	Podiform Cr(?)	PGE		Grab samples contain up to 3 g/t Pt, 1.5 g/t Pd, and 0.03 g/t Rh	Fortymile	Foster and Keith, 1974; Foster, 1975; Keith and others, 1987	Anomalous PGE in two lenses of clinopyroxenite in small ultramafic body that appears to be pendant in a small Mesozoic(?) granodiorite pluton.  Pyroxenite intruded by coarse-grained, irregular felsic dikes.  Local hydrothermal alteration associated with felsic dikes.  Anomalous PGE in altered zone and in clinopyroxenite.  Only one of the 32 separate ultramafic bodies in area exhibits significant values of PGE.  Clinopyroxenite may be part of deformed ophiolite of Seventymile terrane, or part of zoned mafic-ultramafic pluton.	Alaska

Q07-05	Slate Creek (Fortymile)	Q	07	05	64 31 00N	142 30 00W	64.5166666666667	-142.5	6431'N	14230'W	Serpentine-hosted asbestos	Asbestos		Estimated 58 million tonnes grading 6.4% fiber	Fortymile	Foster and Keith, 1974; Robert K. Rogers, written commun., 1984	Antigorite with minor clinochrysotile, chrysotile, magnetite, brucite, and magnesite in serpentinized harzburgite.  Chrysotile asbestos occurs in zones of fracturing near centers of thicker serpentinite, primarily as cross-fiber asbestos in randomly oriented veins about 0.5 to 1 cm thick.  Veins contain alternating zones of chrysotile and magnetite, and commonly exhibit magnetite selvages.  Some chrysotile altered to antigorite.  Harzburgite occurs as tabular tectonic lenses, generally from 60 to 150 m thick and up to 800 m long.  Ultramafic rocks part of deformed ophiolite of Seventymile terrane.	Alaska

Q07-06	Shell Creek	Q	07	06	64 34 00N	140 20 00W	64.5666666666667	-140.333333333333	6434'N	14020'W	Ironstone	Fe		Medium (estimate).  Reserves not available.  Grade approximately 29% Fe.	Unassigned	Gross, 1969; Yukon Minfile, 1978.	Banded ore consists of two facies: a black, slaty, magnetite facies and a grey, cherty, pyrite-pyrrhotite facies.  Deposit hosted in tightly folded quartz-chlorite and quartz-mica schists of Precambrian and (or) Cambrian age. Deposit age interpreted as Precambrian to Cambrian.	Canada

Q07-07	Clinton Creek	Q	07	07	64 26 42N	140 43 18W	64.445	-140.721666666667	6427'N	14043'W	Serpentine-hosted asbestos	Asbestos		Medium.  Reserved of 6.8 million tonnes grading 4.37% fibre.	Fortymile	EMR Canada, 1989.	Consists of cross-fibre chrysotile asbestos veinlets that occur in a body of serpentinite associated with the Proterozoic/Paleozoic Nasina metasedimentary series.  Approximately 0.94 million tonnes of fibre were produced from 15.9 million tonnes of ore mined between 1967 and 1978.  Deposit age interpreted as Late Paleozoic?	Canada

Q07-08	Purdy	Q	07	08	64 07 00N	141 55 00W	64.1166666666667	-141.916666666667	6407'N	14155'W	Au quartz vein	Au		Minor production	Yukon-Tanana Upland 	Helen L. Foster, written commun., 1984; W. David Menzie, written commun., 1985	Small deposit notable for large quartz-calcite fissure vein and veinlets with spectacular "lace" gold.  Large vein extends about 2 m; terminated at one end by fault.  Large vein completely mined-out by 1960.  Vein and veinlets cut mid-Paleozoic or older metasedimentary schists of Stikinia(?) terrane.  Small veins and veinlets mined in 1969 and early 1970's.	Alaska

Q07-09	Brewery Creek (Loki Gold)	Q	07	09	64 03 30N	138 14 18W	64.0583333333333	-138.238333333333	6404'N	13814'W	Sb-Au vein	Au	Sb	Medium.  Reserves of 19.2 million tonnes grading 1.53  g/t Au.	Tombstone	Bremmer, 1990; Loki Gold Corp. news release, November 1, 1994.	Deposit occurs along a shear zone that occurs between a sill-like body of quartz-monzonite, syenite and latite porphyry and underlying graphitic argillite, chert, sandstone, conglomerate and bedded barite of the Devonian and Mississippian Earn Group.  Eight separate deposits occur over a  strike length of 5.5 km. Gold occurs in fine chalcedony-pyrite-arsenopyrite stockworks within several semi-conformable sills and adjacent host rock and in the footwall sedimentary rocks.  Narrow stibnite veins are common, but mainly post-date deposition of gold. About 90% of the deposit is oxidized at depths of 10-110 m.  An open pit, heap-leach mine operation will be opened in late 1995.  Deposit age interpreted as mid-Cretaceous.	Canada

Q08-01	Snake River (Crest Iron)	Q	08	01	65 15 00N	133 00 00W	65.25	-133	6515'N	13300'W	Ironstone	Fe		Large.  Reserves of 5.6 billion tonnes grading 47.2% Fe.	Rapitan	Yeo, 1986; Stuart, 1963.	Consists of a large hematite and jasper iron-formation that occurs near the base of a section of conglomeratic mudstone and diamictite of the Late Proterozoic Rapitan Group of the Windermere Supergroup.  The iron formation forms a stratigraphic interval approximately 130 meters thick. The richest part of deposit occurs in the top 80 meters that contains little or no interbedded sedimentary rocks.  Deposit age interpreted as Late Proterozoic. 	Canada

Q08-02	Hart River	Q	08	02	64 38 54N	136 51 00W	64.6483333333333	-136.85	6439'N	13651'W	Sedimentary exhalative  Zn-Cu-Pb	Zn, Cu, Ag	Pb, Au	Medium.  Reserves of 1.068 million tonnes grading 3.6%Zn.  Average grade of 1.45% Cu, 0.9% Pb, 49.7 g/t Ag, 1.4 g/t Au.	Gillespie 	 Morin, 1978; Yukon Minfile, 1985; Abbott,1987, 1993; EMR Canada, 1989; MacIntyre, 1991.	Consists of pyrite and pyrrhotite and minor sphalerite, galena and tetrahedrite that occur as a tabular mass along a facies change from dolomite to calcareous black argillite of the Early Proterozoic Gillespie Lake Group.  Host rocks are cut by numerous diabase sills and dikes that metamorphose the dolomite to serpentinite-talc and the argillite to hornfels.  Footwall is silicified and has a stockwork of sulfide veinlets, whereas the hanging wall consists of thinly layered sulfides.  Deposit age interpreted as Early Proterozoic. 	Canada

Q08-03	Nick	Q	08	03	64 43 00N	135 13 00W	64.7166666666667	-135.216666666667	6443'N	13513'W	Sedimentary exhalative Ni-Zn	Ni, Zn, PGE		Medium.  Reserves of 900,000 tonnes grading 5.3% Ni, 0.73% Zn, 0.8 g/t PGE+Au.	Dempster	Hulbert and others, 1992; Yukon Minfile, 1992.	Consists of pyrite, vaesite, melnikovite-type-pyrite, sphalerite and wurtzite that occur in a gangue of phosphatic-carbonaceous chert, amorphous silica and intergrown bitumen.  Deposit forms a thin, conformable unit at the contact between Middle and Upper Devonian Earn Group. Host rocks are basinal sedimentary part of a Devonian and Mississippian clastic wedge exposed in an east-west trending syncline.  The basin is interpreted as a local trough or embayment on the eastern margin of the Selwyn Basin.  Deposit age interpreted as Middlt to Late Devonian.	Canada

Q08-04	Rusty Mountain (Vera, Val, Cavey)	Q	08	04	64 18 30N	133 44 54W	64.3083333333333	-133.748333333333	6419'N	13345'W	Ag-Pb-Zn  polymetallic vein	Ag, Pb	Zn	Medium.  Reserves of 949,640 tonnes grading 2.67% Pb, 2.62% Zn, 324 g/t Ag.	Tombstone	EMR Canada, 1989.	Consists of galena, sphalerite and argentiferous tetrahedrite with minor chalcopyrite, and pyrite. Deposit occurs as lenses and shoots along steeply dipping breccia zones in dolomite of the Early Proterozoic Purcell- Wernecke Assemblage and in fracture systems in Lower Paleozoic siltstones.  Deposits related to intrusion of mid-Cretaceous Tombstone Plutonic suite. Deposit age interpreted as Cretaceous(?). 	Canada

Q08-05	Goz Creek Area (Barrier Reef)	Q	08	05	64 22 54N	132 31 00W	64.3816666666667	-132.516666666667	6423'N	13231'W	Southeast Missouri Pb-Zn	Zn, Pb	Ag, Cd	Medium.  Reserves of 2.49 million tonnes grading 11% Zn+Pb.	Northern Cordilleran	Dawson, 1975; EMR Canada, 1989; Dawson and others, 1991; Fritz and others, 1991.	Consists of sphalerite with minor galena, pyrite and boulangerite that occur as fracture and breccia filling and disseminations. Deposit occurs in both stratigraphically and tectonically controlled zones in pervasively silicified sandy dolostone.  Two main deposits and numerous occurrences extend for 8 km along strike of the Risky Formation of the Upper Proterozoic Backbone Ranges Group. Host rocks interpreted as part of a Cambrian- Devonian passive margin.  Smithsonite occurs as weathering product of sphalerite.  Deposit age interpreted as Late Proterozoic.	Canada

Q08-06	Ray Gulch (Potato Hills, Mar)	Q	08	06	64 02 00N	135 45 30W	64.0333333333333	-135.758333333333	6402'N	13546'W	W skarn	W	Au, Sn, As	Large.  Reserves of 7.26  million tonnes grading 0.07% WO3.	Tombstone	Lennan, 1986; EMR Canada, 1989; Yukon Minfile, 1992.	Consists of scheelite that occurs as disseminations and tabular layers in sulfide-free diopside-amphibole-epidote skarn. Deposit hosted in calcareous metasedimentary rocks and tuff of the Upper Proterozoic Hyland Group that is intruded by quartz monzonite sills that dip gently northward towards the Potato Hills Stock. Igneous rocks part of the mid-Cretaceous Tombstone Plutonic suite.  Eight separate skarns occur, the lower four of which contain a high-grade zone of 3.6 million tonnes grading 0.93% WO3.  Deposit age interpreted as mid-Cretaceous.	Canada

Q08-07	Blende (Braine)	Q	08	07	64 24 36N	134 40 12W	64.41	-134.67	6425'N	13440'W	Sedimentary exhalative Pb-Zn	Zn, Cu, Pb, Au, Ag		Large.  Reserves of 19.6 million tonnes grading 3.04% Zn, 2.81% Pb, 56 g/t Ag, 1.6% Cu, 2.75 g/t Au.	Gillespie	Mustard and others, 1990; Yukon Minfile, 1992; NDU Resources, press release, 1993; Robinson and Godwin, 1995.	Consists of pyrite, sphalerite and galena with local chalcopyrite and tetrahedrite that occur in siderite- or dolomite-quartz veins and breccia. Deposit hosted in dolomite of the Gillespie Lake Group of the Early Proterozoic Wernecke Supergroup.  Mafic sills are spatially associated with mineralized veins and vein-breccias within anastomosing shear zones in competent stromatolitic dolostone.  Multistage deposition may be related in part to intrusion of gabbro and diorite.  Deposit age interpreted as Early Proterozoic. 	Canada

Q09-01	Gayna River	Q	09	01	64 56 00N	130 41 00W	64.9333333333333	-130.683333333333	6456'N	13041'W	Southeast Missouri Pb-Zn	Zn, Pb		Medium.  Resource of 50 million tonnes grading 4.7% Zn, 0.3% Pb.	Northern Cordilleran	Hewton, 1982; EMR Canada, 1989.	Consists of sphalerite with minor pyrite and galena that occur in breccias and as tabular replacement bodies in Late Proterozoic shallow water carbonate of the Little Dal Group (Mackenzie Mountain Assemblage).  Replacement bodies interpreted as mineralized breccias that formed as slumps over the flanks of stromatolitic reefs, and also as solution-collapse and fault-related crackle breccias.  Secondary breccias are generally richest.  The Gayna  River district comprises some 18 deposits and more than 100 occurrences.  Several deposits exceed 1 million tonnes of 10% Zn+Pb.  Deposit age interpreted as Late Proterozoic. 	Canada

Q09-02	Bear-Twit	Q	09	02	64 02 48N	129 25 00W	64.0466666666667	-129.416666666667	6403'N	12925'W	Southeast Missouri Pb-Zn	Zn, Pb	Ag	Medium.  Reserves of 8 million tonnes grading 5.4% Zn, 2.6% Pb, 0.5 g/t Ag.	Northern Cordilleran	Brock 1975; Dawson, 1975; Archer Cathro and Associates, company report, 1978; EMR Canada, 1989.	Consists of galena and sphalerite with minor tetrahedrite that occur in brecciated dolomitized shallow water (reef) carbonates of the Lower Devonian Whittaker, Delorme and Camsell Formations. Host rocks interpreted as part of a Cambrian to Devonian passive margin.  Deposit occurs in cross-cutting fractures, breccia matrices, fossil replacement, and also as disseminations in dolomite.  Deposit age interpreted as Early Devonian.	Canada

Q10-01	MacKenzie Basin	Q	10	01	64 25 00N	124 45 00W	64.4166666666667	-124.75	6425'N	12445'W	Stratform salt	Salt		Large.  Reserves and grade not available.	Unassigned	Camsell, 1917; Lord, 1951.	Consists of salt and associated with gypsum that occur in Cambrian, Ordovician and Silurian sedimentary rocks.  Drilling for oil wells encountered four salt beds, with a total thickness of approximately 13 meters.  Salt is 97% sodium chloride.  Salt has not been collected from these beds, but has been collected from evaporating basins near brine springs issuing from the base of an escarpment on the Salt River.  Deposit age interpreted as Paleozoic.	Canada

Q52-01	Syncha-I & II	Q	52	01	67 49 36N	128 02 49E	67.8266666666667	128.046944444444	6750'N	12803'E	Au quartz vein	Au		Contains up to 2-5 g/t Au.	Verkhoyansk	Amuzinsky, 1975; Ivensen and others, 1975.	Consists of two deposits about 20 km apart.  Au quartz veins occur in an extensive northwest-striking zone in anticlinal domes formed in calcareous sandstone and shale.  Most veins are tabular, 2 to 3 m thick, and 120 to 150 m long.  Veins occur both parallel to and across bedding. Also occurring are extensive, conformable, sheet-like veins that are about 2.5 m thick and to 300 m long. Also occurring are small networks of veins in shear zones that are up to 5 m thick and 300 m long.  Vein gangue is mostly quartz with subordinate carbonate and chlorite.  Ore minerals comprise 1% of veins, and include galena, sphalerite, chalcopyrite, pyrite, arsenopyrite, tetrahedrite(?), cassiterite, and gold.  Host rocks exhibit mild silica, sericite, and carbon alteration.

	Russia

Q52-02	Kuolanda	Q	52	02	67 10 31N	127 45 11E	67.1752777777778	127.753055555556	6711'N	12745'E	Ag polymetallic vein	Pb, Zn, Ag	Cu	Average grade of  20-30% Zn, 2% Pb, 1.3% Cu, up to 953 g/t Ag. Reserves of 15,000 tonnes lead, 120,000 tonnes zinc. 	Vostochno-Verkhoyansk	Ivensen and others, 1975; Tseidler, written commun., 1985.	Consists of a mineralized breccia that contains abundant veins and stringers of massive and disseminated galena and sphalerite that are hosted in Lower Carboniferous siltstone and sandstone.  Main ore mineral is sphalerite, with lesser amounts of galena and chalcopyrite.  Subordinate minerals are siderite, arsenopyrite-glaucodot, pyrite-melnikovite, pyrrhotite, and native silver.  Veins are divided into sulfide and quartz-sulfide types.  Some veins range up to 20 m long and 0.2-0.3 m thick.  Vein zones range up to up to 280 m long and from 1.5 to 10 m wide.  Deposit occurs along axis of an anticline.	Russia

Q52-03	Iserdek	Q	52	03	67 08 19N	130 40 38E	67.1386111111111	130.677222222222	6708'N	13041'E	Clastic sediment-hosted Hg	Hg		No data.	Verkhoyansk-Indigirka 	Maslennikov, 1985, written commun., 1977; Shur, 1985.	Deposit occurs in dome of an anticline formed in Lower Permian sandstone and siltstone along cross-cutting, steeply-dipping faults, and along subconformable inter- and intra-bedded fractures.  Main ore minerals are cinnabar, quartz, and dickite.	Russia

Q52-04	Betyugen	Q	52	04	67 05 41N	131 35 33E	67.0947222222222	131.5925	6706'N	13136'E	Sb vein	Sb		Average grade of 35-40% Sb; up to 4.5% As.	Verkhoyansk-Indigirka 	Maslennikov, 1985, written commun.	Consists of small quartz-stibnite vens in gently-dipping interbed fractures.  Veins range from 0.5 to 10 m thick and 30 to 200 m long.  Two ore bodies predominate.  Main minerals are stibnite, quartz, kaolinite, dickite, hydromica, ankerite, arsenopyrite, pyrite, and gold.  Wallrocks exhibit minor sericite, kaolinite, and sulfide alteration. Deposit occurs in the Dulgalak anticline dome formed in an uniform sequence of Upper Permian siltstone.	Russia

Q52-05	Zagadka	Q	52	05	66 55 07N	131 01 07E	66.9186111111111	131.018611111111	6655'N	13101'E	Clastic sediment-hosted Hg	Hg, Sb		Average grade of 0.22-6.2% Hg, 0.8-20% Pb, 2-10% Zn, 4-10% Sb, and up to 30 g/t Ag. Estimated resource of 1,718 tonnes mercury and 1,000 tonnes antimony.	Verkhoyansk-Indigirka 	Maslennikov, written commun., 1977, 1985.	Consist of cinnabar and metacinnabarite and are relatively younger than associated Sb-Au vein deposits that consist of stibnite and berthierite. The Zagadka clastic sediment-hosted Hg deposit occurs in Upper Permian sandstone and siltstone that is gentle folded and cut by steeply-dipping faults. Deposit is located a linear zone about 2.4 km long within one of the faults. Thickness and morphology of deposit is controlled by shear zones and associated feathered veins and stringers. Ore deposit is mainly cinnabar that occurs in zones that range from 0.4 to 3 m thick. Subordinate minerals are galena, sphalerite, stibnite, Pb-sulfosalts, and cassiterite. Gangue minerals are quartz, dickite, and carbonate minerals. Wall rocks exhibit dickite, quartz and carbonate alteration.	Russia

Q52-06	Zvezdochka	Q	52	06	66 43 18N	131 02 44E	66.7216666666667	131.045555555556	6643'N	13103'E	Clastic sediment-hosted Hg	Hg		Medium.  Average grade of 1.5-1.95% Hg;  Reserve of 3712 tonnes Hg.	Verkhoyansk-Indigirka 	Maslennikov, 1977; Klimov, 1979;  Maslennikov, written commun., 1985; Shur, 1985.	Consists of intercalated Triassic sandstone and siltstone deformed into small folds that strike roughly north-south.  Ore bodies are 0.2 to 11 m thick, dip westerly at 70-75, and are occur along a fault along the axis of an anticline.  Outlines of ore bodies are not distinct and were found by geochemical channel sampling.  Deposit hosted mostly in sandstone in the western limb of an anticline.  Cinnabar is the major ore mineral; native mercury occurs at depths greater than 100 m.  Other ore minerals are metacinnabarite, pyrite, maracasite, galena, sphalerite, chalcopyrite, and arsenopyrite are less wide-spread.  Stibnite, gold, and silver are rare.  Gangue minerals are quartz, ankerite, calcite, dickite, and kaolinite.  Wallrocks exhibit intense silica, dickite, and carbon alteration.	Russia

Q52-07	Kholbolok	Q	52	07	66 15 27N	131 48 25E	66.2575	131.806944444444	6615'N	13148'E	Clastic sediment-hosted Hg	Hg		Contains up to 0.62% Hg.	Verkhoyansk-Indigirka 	Ivensen and others, 1975; Klimov, 1979; Shur, 1985.	Deposit occurs in an anticlinal dome formed in Middle Triassic sandstone along  intersections of variously-oriented faults. Deposit located by geochemical sampling. Disseminated ore occurs in silicified sandstone and metasomatic shear zones.  Ore bodies range up to 15 to 20 m thick.  Mjaor ore mnerals are cinnabar (5%), quartz, ankerite, and dickite. Rare ore minerals are pyrite, stibnite, realgar, orpiment, metacinnabarite, chalcopyrite, tetrahedrite, and gold are rare.  Wallrocks exhibit silica and dickite alteration.	Russia

Q52-08	Bochiyskoe	Q	52	08	66 14 14N	129 57 45E	66.2372222222222	129.9625	6614'N	12958'E	Sn polymetallic vein	Sn		Average grade of 0.36-0.52% Sn.	Verkhoyansk 	Ivensen and Proschenko, 1961.	Deposit occurs in a sandstone bed on the eastern limb of an anticline and consists of a stringer from 8 to 10 m thick and 600 m long. Veins consist predominantly of sulfides, including chalcopyrite, pyrite, galena, arsenopyrite, sphalerite, pyrrhotite, and stannite.  Other vein minerals are quartz, tourmaline, calcite, ankerite, and cassiterite.  Wallrocks exhibit tourmaline, chlorite, sericite, and kaolinite alteration.	Russia

Q52-09	Imtandzha	Q	52	09	66 07 56N	129 36 19E	66.1322222222222	129.605277777778	6608'N	12936'E	Sn polymetallic vein	Sn		No data.	Verkhoyansk 	 Indolev and Nevoisa, 1974; Ivensen and Proschenko, 1961.	Deposit occurs in a zone of an intense fissuring up to 500 m wide, 2 km long, and along the axis of an anticline.  Granodiorite porphyry dikes associated with deposit.  Dikes cut polymetallic veins and in turn are cut by Sn-sulfide veins.  Early-stage silver-polymetallic veins are mostly conformable.  Later-stage veins are mostly cross-cutting, but are less common.  Veins are 0.01 to 0.85 m thick.  Major ore minerals are galena, sphalerite, and siderite. Lessor vein minerals are quartz, tetrahedrite, pyrite, arsenopyrite, and boulangerite. Later-stage veins contain quartz, chlorite, pyrite, arsenopyrite, galena, cassiterite, tourmaline, and stannite and are 0.1-0.6 m thick.  Stringers range 2 to 3 m thick and are up to 1 km long.	Russia

Q52-10	Chochimbal	Q	52	10	65 53 36N	129 45 17E	65.8933333333333	129.754722222222	6554'N	12945'E	Polymetallic vein	Au, Ag, Pb		Range of 0.1-15 g/t Au. Average grade of 2-3 g/t Au;  up to 6,000 g/t Ag; 0.1% Sb; up to 1% As; 2% Zn; 18% Pb.	Verkhoyansk 	Indelev and Nevoisa, 1974; Ivensen and others, 1975;  Vladimirtseva, written commun., 1985.	Consists of shallow-dipping, and steeply-dipping crosscutting carbonate-quartz-sulfide veins that occur in the Imtandzha anticlinal dome formed in Middle Carboniferous clastic rocks. Ten known ore bodies are known.  Ore bodies range from 0.1 2.8 m thick and are 400-500 m long.  Major ore minerals are quartz (30-60%), siderite (20-25%), sulfides (25-30%), pyrite, arsenopyrite, Fe-sphalerite, and galena.  Lesser ore minerals are chalcopyrite, pyrrhotite, tetrahedrite, bournonite, native gold (fineness 713-743), and boulangerite.  	Russia

Q52-11	Galochka	Q	52	11	65 42 03N	128 25 33E	65.7008333333333	128.425833333333	6542'N	12826'E	Au quartz vein	Au		Small.  Contains up to 20.5 g/t Au; up to 6.4 g/t Ag.	Verkhoyansk 	Vladimirtseva, written commun., 1985.	Cnsists of quartz stringers that are 30 m wide, 170 m long. Hosted along a roughly north-south trending fault that cuts an anticlinal dome formed in Lower Permian sandstone and shale.  Stringers are 0.02 to 0.1 m thick and include quartz, calcite, chlorite, sphalerite, galena, pyrite, chalcopyrite, and gold.	Russia

Q52-12	Mangazeika	Q	52	12	65 46 07N	130 34 40E	65.7686111111111	130.577777777778	6546'N	13035'E	Ag polymetallic vein	Pb, Ag	Zn	Average grade of 75% Pb; 0.3-5% An; 500-3,938 g/t Ag; and 0.1-0.5 g/t Au. Estimated reserves of 62,375 tonnes lead, 2,900 tonnes zinc, and more than 1,000 tonnes silver. Silver mined from 1915-1922. 	Vostochno-Verkhoyansk	Indolev and Nevoisa, 1974; Tseidler, written commun., 1985.	Consists of nine interbedded polymetallic veins that occur in Lower Permian deposits that are deformed into gently-plunging, tight folds that form a long, thin map pattern.  Veins fill fissures along argillite and sandstone bed contacts.  Ore bodies are conformable to bedding, 50 to 1,300 m long, and 3 cm to 1 m thick.  Main ore minerals are galena and sphalerite.  Minor  ore minerals are pyrite, arsenopyrite, chalcopyrite, owyheeite, freibergite, diaphorite, boulangerite, pyrargyrite,miargyrite, cassiterite, stannite, and native gold, native silver, and argentite.  Gangue minerals are manganosiderite, quartz, ankerite, sericite, chlorite, and tourmaline.  Deposit formed in seven stages.  	Russia

Q52-13	Bezymyannoe	Q	52	13	65 38 48N	130 36 11E	65.6466666666667	130.603055555556	6539'N	13036'E	Ag polymetallic vein	Ag, Pb		Small.  Averages grade of 4,800 g/t Ag; to 41% Pb; to 3% Zn; 0.11-0.54% Sn; 0.33-4.5% As; 0.11-0.54% Cu.	Vostochno-Verkhoyansk	Indolev and Nevoisa, 1974; Tseidler, 1985, written commun.	Consists of twelve gentlly-dipping veins that occur near the dome of an anticline formed in Lower Permian clastic rocks. Veins occur along or inclined to bedding, along sandstone and siltstone contacts, in fissures, and in cement breccia in sandstone beds.  Veins are 50 to 600 m long and 5 to 60 cm thick.  Veins consist mostly of quartz and siderite.  Ore minerals comprise 10 to 15% of veins.  Main ore minerals are owyheeite, diaphorite, galena, and miargyrite.  Subordinate minerals are freibergite, arsenopyrite, pyrite, chalcopyrite, pyrargyrite, stannite, sphalerite, cassiterite, argentite, native silver and gold, boulangerite, jamesonite, ferberite, and pyrrhotite.  Deposit formed in nine stages.  	Russia

Q52-14	Anomalnoe	Q	52	14	65 37 17N	131 49 18E	65.6213888888889	131.821666666667	6537'N	13149'E	Sn silicate-sulfide vein	Sn		Average grade of  0.001-2.57% Sn.	Yana-Polousnen	Ivensen and others, 1975; Shur, 1985.	Consists of three types of veins: (1)  concordant occurrences in interbed fractures; (2) cross-cutting veins from 0.1 to 20 m thick; and (3) mineralized shear zones from 0.1 to 9 m thick.  Vein zones range from 100 m to 2 km long.  Main ore minerals are tourmaline, chlorite, quartz, arsenopyrite, cassiterite, wolframite, pyrite, and pyrrhotite. Lesser ore minerals are galena, Fe-sphalerite, Mn-siderite, scheelite, stannite, and tetrahedrite.  Wallrocks exhibit tourmaline, silica, and chlorite alteration. Deposit occurs along western limb of an overturned syncline formed in Triassic to Early Jurassic sandstone and intercalated siltstone and conglomerate.  Sedimentary rocks are contact metamorphosed from an unexposed intrusion.  Pre-ore lamprophyre dikes occur within the ore field.  	Russia

Q52-15	Dyabkhanya	Q	52	15	65 29 52N	129 59 52E	65.4977777777778	129.997777777778	6530'N	12960'E	Au polymetallic vein	Au, Ag	Cu, Pb, Zn	Average grade of 3.9-11% As; up to 5.6 g/t Au; 1-4.31% Cu; 0.2-0.86% Pb; 0.49-1.48% Zn; 40-589.2 g/t Ag.	Verkhoyansk 	Ivensen and others, 1975; Vladimirtseva, written commun., 1985.	Consists of a set of sulfide-quartz veins and stringers that are hosted in Late Carboniferous and Early Permian sedimentary rocks.  Deposit occurs in three zones that are 270 to 2,000 m long and 1 to 30 m wide.  Stringers range from  0.15 to 0.3 m thick.  Major ore minerals are pyrite, arsenopyrite, and chalcopyrite. Rare ore minerals are pyrrhotite, sphalerite, galena, and tetrahedrite.  Gangue minerals are quartz and siderite. Host rocks exhibit minor carbonate and sulfide alteration.	Russia

Q52-16	Balbuk	Q	52	16	64 49 02N	130 36 38E	64.8172222222222	130.610555555556	6449'N	13037'E	Pb polymetallic vein	Pb	Au, Ag	Average grade of 11.2% Pb. Local areas with 380-420 g/t Ag and 70-80 g/t Au.	Verkhoyansk 	Vikhert and others, 1961.	Consists of a set of cross-cutting quartz-galena veins that occur in the dome of an anticline formed in Permian sandstone and siltstone. Main vein dips vertically, is 120 m long, and has an average thickness of 0.88 m. Vein contains swells up to 3 m thick that are spaced every 10 to 12 m. Swells form verticle columns. Breccia ores formed when host rock clasts were coated with quartz and galena.  Some evidence indicates that some minerals crystallized from colloidal suspension. Veins locally consist mostly of galena (75%).   	Russia

Q53-01	Ege-Khaya	Q	53	01	67 38 07N	134 46 53E	67.6352777777778	134.781388888889	6738'N	13447'E	Sn polymetallic vein	Sn, Zn		Medium.  Average grade of 0.1-3% Sn; 0.1-3% Zn. Limited production.	Yana-Polousnen	Flerov, 1976;  Shur, 1985; Spomnor and others, written commun., 1985.	Consists of mineralized shear zones, stringers, and less common veins.  Deposit occurs in zones from 0.7 to 4 m thick and up to 1 km long, dips steeply, and extends to a depth of 500 m.  Host rocks exhibit minor contact metamorphism and consist of Upper Triassic shale and interbedded sandstone.  Major minerals are quartz, chlorite, cassiterite, sphalerite, pyrrhotite, pyrite, marcasite, siderite, and calcite.  Subordinate minerals are arsenopyrite, galena, stannite, chalcopyrite, wolframite, bismuth, tourmaline, and albite.  Sulfides are predominant at depth.  Wallrocks exhibit chlorite, silica, and sulfide alteration.	Russia

Q53-02	Kysylga	Q	53	02	67 33 21N	137 55 06E	67.5558333333333	137.918333333333	6733'N	13755'E	Au-Ag epithermal vein	Au, Ag		Average grade of 3.0-84.5 g/t Au, 1-37 g/t Ag; 0.01-0.1 As; 0.01-0.04% Sb; 0.002% Sn, and 0.03% Pb.	Dogdo-Erikit	Shosin and Vishnevsky, 1984; Vladimirtseva, written commun., 1985; Nekrasov and others, 1987; Gamyanin and Goryachev, 1988.	Consists of veins in a zone that varies from 0.60-1.25 m thick and up to 400 m long. Veins composed of gangue quartz and calcite with ore minerals (1-5%) of arsenopyrite, pyrite, Ag-tetrahedrite, pyrrhotite, sphalerite, galena, chalcopyrite, boulangerite, Ag-jamesonite, and gold (fineness of 638). Veins strike from roughly east-west to northeast and dip steeply to south. Veins exhibit breccia or, less commonly, comb and massive structures, and often grade into stringers. Deposit occurs in feathered fissures of a northwest-striking major fault in Late Triassic sandstone and siltstone. Host rocks exhibit linear folding and intense contact metamorphism adjacent to a granitic intrusive. Wallrocks exhibit sericite, chlorite, and feldspar alteration. 	Russia

Q53-03	Billyakh	Q	53	03	67 35 03N	134 06 11E	67.5841666666667	134.103055555556	6735'N	13406'E	Au-Sb polymetallic vein	Sb, Au		Contains up to 23.2% Sb.	Adycha-Taryn	Indolev and others, 1980; Maslennikov, written commun., 1985; Shur, 1985.	Consists of stibnite and quartz veins, stibnite stringers, and two stockworks in the dike, adjacent to hanging wall of dike.  Main ore minerals are stibnite, quartz, ankerite, calcite, gold, and dickite.  Deposit occurs in an east-west trending granite-porphyry dike that intrudes Upper Triassic sandstone and siltstone deformed into a gently-plunging fold. Wallrocks exhibit sericite, silica, and sulfide alteration. A granite body is interpreted to occur at depth.  The dike has a K-Ar isotopic age of 119 Ma, is 7 km long, 2-35 m thick, and dips steeply to south.  	Russia

Q53-04	Khoton-Khaya	Q	53	04	67 17 27N	133 46 57E	67.2908333333333	133.7825	6717'N	13347'E	Sn-polymetallic vein, Sn silicate-sulfide vein	Sn		Sn 1.2-1.8%.	Yana-Polousnen	Flerov, 1976; Spomior and others, written commun., 1985.	Consists of steeply-dipping mineralized shear zones that average 1 to 1.5 m thick and 100 to 1,000 m long.  Ore minerals are quartz, tourmaline, cassiterite, stannite, arsenopyrite, pyrite, chalcopyrite, sphalerite, galena, bismuthine, chlorite, and siderite.  Wallrocks exhibit silica, tourmaline, and sulfide alteration. Deposit hosted in Upper Triassic sandstone and shale  near the top of an unexposed granitic intrusion.  Sedimentary rocks are contact metamorphosed and are cut by numerous dikes of granite porphyry, granodiorite porphyry, and less common diorite.	Russia

Q53-05	Kester	Q	53	05	67 17 29N	134 37 41E	67.2913888888889	134.628055555556	6717'N	13438'E	Sn greisen	Sn, Ta, Nb, Li		Small. Average grade of 0.3% Sn; up to 0.5% Nb205 ; up to 0.35% Li20 . Partly mined.  	Yana-Polousnen	Flerov, 1976; Shur, 1985; Spomior and others, written commun., 1985.	Consists of greisen with major minerals of quartz, muscovite, albite, potassium feldspar, molybdenite, zinnwaldite, tourmaline, topaz, amblygonite, apatite, cassiterite, wolframite, and tantaloniobate.  Also occurring are stannite, arsenopyrite, and Pb sulfosalts.  Host granite exhibits intense greisen alteration and local tourmaline and sulfide alteration. Deposit exhibits an irregular shape and occurs within the margin of a stock of subalkalic alaskite granite that intrudes the Arga-Ynnakhai granodiorite pluton.  Deposit dimensions are 80 by 1,200 m and is up to 60 m thick. 	Russia

Q53-06	Ulakhan-Egelyakh	Q	53	06	67 08 51N	134 21 02E	67.1475	134.350555555556	6709'N	13421'E	Sn silicate-sulfide vein	Sn		Major.  Average grade of  0.7% Sn, Pb, Zn, Cu.	Yana-Polousnen	Flerov, 1976; Shur and Flerov, 1979; Shur, 1985; Spomior and others, written commun., 1985.	Consists of shear zones, extensive veins and, stockworks that strike northeast.  Ore zones average 1.6 m thick and range up to 2 km long.  Minerals are quartz, chlorite, cassiterite, sphalerite, arsenopyrite, galena, chalcopyrite, siderite, fahlore, tourmaline, bismuthine, and pyrargyrite. Deposit hosted in Upper Triassic sandstone and shale that is contact metamorphosed near the contact of the Arga-Ynnak-Khai granite pluton. 	Russia

Q53-07	Ak-Altyn	Q	53	07	67 01 44N	133 59 46E	67.0288888888889	133.996111111111	6702'N	13360'E	Au-Ag epithermal vein	Au	Ag	Small. Average grade of 0.2-60.4 g/t Au; and 0.1-1% Ag, Hg, Pb, Sb, Zn, As, Cu.	Adycha-Taryn 	Vladimirtseva, written commun., 1985.	Consists of quartz and quartz-carbonate veins, up to to 2 to 3 m thick and stringers that occur in a zone 10-30 m wide and 150 m long. Deposit is hosted in gently-dipping Middle Triassic (Ladinian) clastic rocks that are intruded by Lower Cretaceous diorite porphyrite dikes. Ore is dominated by fine-grained quartz (chalcedony) with sparse sulfides (about 1%), including galena, sphalerite, chalcopyrite, arsenopyrite, and pyrite. Gold fineness is low. 	Russia

Q53-08	Lazo	Q	53	08	66 38 07N	136 50 46E	66.6352777777778	136.846111111111	6638'N	13651'E	Au quartz vein	Au		Small.  Average grade of 0.1-9.1 g/t Au.	Yana-Kolyma	Rozhkov and others, 1964; Flerov and others, 1979;Vladimirtseva, written commun., 1987.	Consists of a set of en echelon quartz veins and locally a stockwork that strike northeast. Veins are 0.04 to 0.4 m thick and up to 100 m long.  Density of veins ranges from 1 to 10 per one meter.  Ore minerals are arsenopyrite, sphalerite, pyrite, chalcopyrite, tetrahedrite, galena, boulangerite, and sparce scheelite.  Gold occurs irregularly with an average grade of 1.2 g/t Au in the stockwork.  Wallrocks exhibit beresite alteration. Deposit occurs along limb of a syncline formed in contact metamorphosed Upper Triassic siltstone and sandstone.  Sedimentary rocks are intruded by diorite porphyrite dikes and two small stock-like diorite and granodiorite plutons.  	Russia

Q53-09	Sentachan	Q	53	09	66 29 23N	137 03 11E	66.4897222222222	137.053055555556	6629'N	13703'E	Sb-Au vein or clastic sediment-hosted Sb-Au	Sb		Average grade of 3.2-40.3% Sb. Locally up to 30 % Sb and 50 g/t Au. Mined. Proven reserves of 100,000 tonnes antimony	Adycha-Taryn 	Berger, 1978; Zharikov, 1978; Klimov and Indolev, 1979; Indolev and others, 1980; Maslennikov, written commun., 1985; Shur, 1985.	Consists of two rod-like veins, from 85 to 200 m long and 0.2-3.1 m thick, occur in shear zones that strike northwest and dip 60-80 northwest.  Veins extend to at least a depth of 600 m.  Main ore minerals are stibnite and quartz. Subordinate ore minerals are ankerite, muscovite, pyrite, arsenopyrite, dickite, and hydromicas.  Rare minerals are sphalerite, gold, chalcostibnite, berthierite, tetrahedrite, zinkenite, jamesonite, aurostibnite, and chalcopyrite.  Wallrocks exhibit quartz, carbonate, hydromica and dickite alteration.  Disseminated pyrite and stibnite occur in aureoles around deposit. Deposit hosted in Upper Triassic (Norian and Rhaetian) clastic rocks that are deformed into northwest-trending, gently-plunging folds.  Ore bodies occur along northwest-trending Adycha-Taryn fault zone and are conformable to folding.  	Russia

Q53-10	Burgavli	Q	53	10	66 27 40N	137 38 42E	66.4611111111111	137.645	6628'N	13739'E	Sn quartz vein	Sn		Medium.  No data.	Yana-Kolyma	Flerov, 1976; Flerov and others, 1979.	Consists of stockworks, mineralized shear zones and short feathered veins. Ore minerals are quartz, adularia, arsenopyrite, muscovite, cassiterite, fluorite, tourmaline, beryl, topaz, apatite, scheelite, wolframite, and bismuthine. Some ore bodies are dominated by pyrrhotite, arsenopyrite, ferruginous sphalerite, stannite, chalcopyrite, pyrite, galena, sphalerite, and siderite.  Wallrocks altered to greisen along with tourmaline, and quartz alteration. Deposit occur in an east-west trending fault that cuts Middle Jurassic sandstone in a small anticline. Host rocks are contact metamorphosed over an area of 3 km2.	Russia

Q53-11	Delyuvialnoe	Q	53	11	66 17 00N	136 53 01E	66.2833333333333	136.883611111111	6617'N	13653'E	Granitoid-related Au	Au	W	Medium.  Range of 0.1-75.8 g/t Au; average grade of 5 g/t Au; 0.1-3% W ; 0.01-1.1% As.	Yana-Kolyma	Rozhkov and others, 1964; Flerov and others, 1979; Vladimirtseva, written commun.,1985.	Consists of shear zones and quartz stringers that occur in a brachyanticlinal dome formed in contact metamorphosed Upper Triassic (Norian) sandstone and siltstone.  Deposit comprises an area 500 by 1,500 m.  Shear zones range from 1 to 20 m thick;  stringers occur in zones up to 100 m thick. Shear zones and stringers occur in areas up to 250-300 m long, trend east-west, and dip 50-70.  An unexposed part of the neighboring Chenkelenyn intrusion is interpreted to occur at depth.  Ore minerals are arsenopyrite, pyrite, more seldom galena, chalcopyrite, scheelite, wolframite, bismuthine, native gold (fineness 600-700), and cassiterite.  Gangue minerals are mainly quartz and less common chlorite and carbonate minerals. Wallrocks exhibit chlorite and sulfide alteration.  	Russia

Q53-12	Kere-Yuryak	Q	53	12	66 16 30N	137 57 36E	66.275	137.96	6617'N	13758'E	Sn-W greisen	Sn, W		Average grade of  0.6% Sn; 0.487% As; 0.62% W.	Yana-Kolyma	Flerov and others, 1979.	Deposit occurs in apical portion of a granite pluton that intrudes an anticline formed in Middle Jurassic sandstone.  Consists of stockwork veins and stringers that occur along the upper contact of the pluton.  Veins and stringers are 0.1 to 2 m thick and range up to 100 m long.  Outcrops of vein and stringer zones vary from 50 to 150 m wide.  Major minerals are quartz, tourmaline, muscovite, arsenopyrite, cassiterite, and wolframite.  Rare minerals are topaz, apatite, scheelite, tetrahedrite, pyrite, molybdenite, and bismuthine.  Deposit associated with intense greisen alteration.	Russia

Q53-13	Uzlovoe	Q	53	13	66 06 13N	137 47 33E	66.1036111111111	137.7925	6606'N	13748'E	Sb-Au vein or clastic sediment-hosted Sb-Au	Au, Sb		Average grade of 6.64 g/t Au for one ore body, and range of 0.2-36.2 g/t Au. Average grade of  0.1-48% Sb.	Adycha-Taryn	Maslennikov, written commun., 1985.	Consists of quartz-stibnite veins and stringers that occur in mylonitc formed in Triassic rocks in the Adycha-Taryn fault.  Two stringers are known, along with stibnite lenses and tabular bodies.  Zones range up to 2.5 to 3 m thick and up to100 m long.  Stringers are associated with disseminated sulfide aureoles.  Major minerals are quartz, stibnite, arsenopyrite, and pyrite.	Russia

Q53-14	Ilin-Tas	Q	53	14	65 59 56N	135 55 54E	65.9988888888889	135.931666666667	6560'N	13556'E	Sn silicate-sulfide vein	Sn	W, Au	Major.  Average grade of 0.7-2.5% Sn; 0.3-1.0% W03; up to 10 g/t Au.	Yana-Polousnen	Shur and Flerov, 1979; Spomior and others, written commun., 1985.	Consists of complex veins and less common shear zones and stringers that occur in contact metamorphosed Upper Triassic sandstone and siltstone adjacent to the Bezymyanny granitoid pluton. Ore bodies dip steeply, range from 0.01 to 6 m thick. and are about 100 m long.  Veins are most dense at a distance of 500-1,000 m from the intrusive contact.  Major minerals are quartz, tourmaline, cassiterite, stannite, wolframite (ferberite), pyrrhotite, pyrite, arsenopyrite, and chalcopyrite. Also occurring are Bi and Te minerals. 	Russia

Q53-15	Alys-Khaya	Q	53	15	65 55 49N	135 42 50E	65.9302777777778	135.713888888889	6556'N	13543'E	Sn polymetallic vein	Sn	Co	No data.	Yana-Polousnen	Flerov, 1976; Shur, 1985.	Consists of complex steeply-dipping northeast-striking polymetallic veins. Zones of closely-spaced veins are common.  Veins range up to 1 m thick and about 100 m long.  Veins are mainly quartz and chlorite.  Main ore minerals are cassiterite, stannite, Co-arsenopyrite, safflorite, and sphalerite.  Rare minerals are wolframite and chalcopyrite. Deposit occurs in one limb of a north-northwest-trending anticline formed in contact metamorphosed Upper Triassic (Norian) sandstone and shale.  Sedimentary rocks are intruded by rhyolite, dacite, and andesite-basalt dikes that were also contact metamorphism during intrusion of Khatakchan granodiorite.  	Russia

Q53-16	Burgachan	Q	53	16	65 45 54N	134 45 18E	65.765	134.755	6546'N	13445'E	Sn polymetallic vein	Sn	Co	Medium.  Average grade of 1.2% Sn; up to 0.34% Co.	Yana-Polousnen	Flerov, 1976; Shur, 1985; Spomior and others, written commun., 1985.	Consists of shear zones and steep-lying complex veins that are about 1 m thick and up to 800 m long.  Deposit extends more than 200 m vertically.  Minerals are quartz, chlorite, cassiterite, stannite, pyrrhotite, pyrite, chalcopyrite, arsenopyrite, sphalerite, galena, sulfosalts, molybdenite, glaucodot, and bismuthine.  Wallrocks exhibit silica, chlorite, sulfide, and tourmaline alteration. Deposit hosted in Upper Triassic (Carnian) sandstone, siltstone, and argillite that are contact metamorphosed and intruded by granodiorite, diorite porphyrite, and lamprophyre dikes.  	Russia

Q53-17	Prognoz	Q	53	17	65 40 37N	133 29 17E	65.6769444444444	133.488055555556	6541'N	13329'E	Ag polymetallic vein	Ag, Pb		World class. Average grade of 3% Pb; 1% Zn; up to 600 g/t Ag. Probable resource of more than 2,000 tonnes silver.	Vostochno-Verkhoyansk	Vladimirtseva, written commun., 1985; Alekseev and others, 1991.	Consists of long and thin sulfide-carbonate veins that are hosted in Triassic clastic rocks.  Major minerals are siderite, galena, pyrargyrite, owyheeite, and various Ag minerals, and sphalerite. Premineralization granite-porphyry dikes occur within the deposit. 	Russia

Q53-18	Bugdogar	Q	53	18	65 12 29N	133 58 39E	65.2080555555556	133.9775	6512'N	13359'E	Sn polymetallic vein	Sn	Pb	Small. Average grade of  0.01-0.2% Sn; 0.1-3% Pb; up to 0.2% W .	Yana-Polousnen	Tseidler, written commun., 1985.	Consists of more than 30 shear zones with mainly quartz and sulfide minerals. Shear zones range from 1 to 8 m thick, up to 1 km long, and occupy an area of 1.5 km2.  Main ore minerals are limonite, cassiterite, wolframite, galena, arsenopyrite, and chalcopyrite.  Ore partly oxidized. Deposit hosted in Middle Triassic contact metamorphosed sandstone and shale adjacent to contact of the small Bugdogar granite stock.  	Russia

Q53-19	Imnekan	Q	53	19	64 45 32N	135 44 27E	64.7588888888889	135.740833333333	6446'N	13544'E	Sb vein	Sb		No data.	Verkhoyansk-Indigirka	Klimov and Indolev, 1979.	Consists of massive quartz-stibnite veins that contain up to 1% pyrite, plus arsenopyrite, galena, sphalerite, and other sulfides.   Deposit spatially associated with pre-mineralization lamprophyre dikes and occurs in the dome of the Korobchataya anticline formed in intercalating Lower-to-Middle Triassic siltstone and sandstone.  Veins occur along a zone of major, deep, longitudinal and transverse, intersecting faults, in fractures that occur diagonal to the fold axis. Veins also occur along the contacts between dikes and host rocks. Wallrocks exhibit quartz-sericite, carbonate, and silica alteration.	Russia

Q53-20	Singyami	Q	53	20	64 41 39N	137 40 11E	64.6941666666667	137.669722222222	6442'N	13740'E	Clastic sediment-hosted Hg	Hg		No data.	Verkhoyansk-Indigirka	Klimov, 1979.	Consists of cinnabar that occurs in cross-cutting and interbedded shear zones. Deposit hosted in Middle-to-Upper Triassic sandstone and siltstone that are deformed into brachyanticlines associated with faults.  	Russia

Q53-21	Khunkhada	Q	53	21	64 34 03N	134 49 17E	64.5675	134.821388888889	6434'N	13449'E	W-Sn skarn	W, Sn		Small. Contains up to 0.25% W03 .	Tompon	Natapov, written commun., 1985.	Consists of sheet-like skarn bodies that occur in contact metamorphosed Upper Permian-to-Lower Triassic siltstone. Skarn bodies range from 1.4 to 3.5 m thick and from 10 to locally more than 100 m long.  Major minerals are pyroxene, garnet, quartz, pyrrhotite, pyrite, arsenopyrite, chalcopyrite, and scheelite.	Russia

Q53-22	Erikag	Q	53	22	64 29 53N	137 18 01E	64.4980555555556	137.300277777778	6430'N	13718'E	Sn quartz vein	Sn		No data.	Tompon	Flerov and others, 1974.	Consists of sulfide-quartz veins and stringers in a zone that occurs parallel to bedding. Veins and stringers comprise an east-west trending band that dips steeply south.  Major minerals are quartz, pyrite, and stannite. Subordinate minerals are arsenopyrite, lllingite, cassiterite, bismuthine, bismuth, chalcopyrite, and sphalerite.  Traces of pyrargyrite, tetrahedrite, and silver occur.  Wallrocks exhibit intense chlorite, sericite, and tourmaline alteration. Deposit hosted in steeply-dipping, contact metamorphosed sandstone and shale in the contact aureal of the Erikag granodiorite pluton with a K-Ar isotopic age of 125-130 Ma.  Sedimentary rocks strike east-west.	Russia

Q53-23	Agylki	Q	53	23	64 17 24N	137 16 18E	64.29	137.271666666667	6417'N	13716'E	W skarn	W, Cu		Medium to large?	Tompon	Flerov, Bichus, and Korostelev, 1974.	Consists of scheelite skarn that occurs as layers of metamsomatized limestone in contact metamorphosed Lower Triassic argillite and siltstone.  Pyroxene-garnet skarn up to 3 to 5 m thick.  Three successive metasomatic mineral assemblages are identified:  (1) scheelite-quartz; (2) sulfide; and (3) calcite.  Most tungsten occurs in scheelite and rarely in wolframite.  Main sulfide minerals are pyrrhotite and chalcopyrite. Subordinate minerals are pyrite, arsenopyrite, stannite, sphalerite, galena, native bismuth, and bismuthine.  Contact metamorphosed argillite is ore-free.  Deposit occurs on limbs of a brachyform anticline in the thermal aureole of an unexposed granitoid intrusion with numerous apophyses of granodiorite porphyry dikes.  Deposit dips 20-35 on the anticline limbs.  	Russia

Q54-01	Titovskoe	Q	54	01	67 32 32N	139 13 40E	67.5422222222222	139.227777777778	6733'N	13914'E	Sn (B) magnesian skarn	B	Sn	Medium to large.   Average grade of 9.5% B2O3; 0.3% Sn.	Darpir	Dorofeev, 1979.	Consists of forty ore bodies that occur in Mg skarns that occur along the contact between the quartz monzonite phase of an Early Cretaceous granitoid intrusion and Silurian and Devonian dolomite and limestone.  Skarns range from 5 cm to 20 m thick and from 50 to 1,000 m long.  Main ore mineral is ludwigite that forms up to 70-80% of some ore bodies.  Skarns also contain ascharite, kotoite, datolite, harkerite, monticellite, fluoborite, clinohumite, calcite, periclase, forsterite, diopside, vesuvianite, brucite, garnet, axinite, tourmaline, biotite, phlogopite, serpentine, spinel, hornblende, pyroxene, feldspar, quartz, and magnetite.  Sn occurs as an isomorphous admixture in ludwigite.  Ludwigite often replaced by sulfides, including pyrrhotite, sphalerite, pyrite, arsenopyrite, and chalcopyrite.  Kotoite ore veins occur along margins of ludwigite bodies.  Contact between the intrusion and carbonate is highly irregular.  Most skarn bodies occur where the contact forms embayments  into the intrusion.  Deposit occurs in an area 3 by 6 km.	Russia

Q54-02	Dogdo	Q	54	02	67 21 07N	139 26 49E	67.3519444444444	139.446944444444	6721'N	13927'E	Volcanic-hosted Hg	Hg	Barite	Small to medium.  Average grade of 0.35  to 0.90% Hg.	Dogdo-Erikit	Klimov, 1979; Vladimirtseva, written commun., 1987.	Consists of four lenticular and podiform ore bodies that occur in strongly silicified Late Jurassic andesite-dacite tuff. Ore bodies are 20 to 100 m long and 2 to 8 m wide. Ore minerals are quartz, calcite, barite with disseminations and stringers of cinnabar, pyrite, arsenopyrite, sphalerite, galena, and chalcopyrite. Ore district is characterized by a close correlation between Hg content and barite. Deposit controlled by a northwestern thrust fault, secondary quartzite occurrences, and occurrence of ore bodies along feathering fractures of the thrust fault. 	Russia

Q54-03	Aleshkino	Q	54	03	67 11 01N	138 22 25E	67.1836111111111	138.373611111111	6711'N	13822'E	Au quartz vein	Au		Medium. Average grade of 8-45.6 g/t Au. 	Yana-Kolyma	Vladimirtseva, written commun., 1987.	Consists of six quartz veins that range from 0.35 to 1 m thick and up to 160 m long, in a single shear zone. Deposit hosted in cotnact metamorphosed Late Jurassic(?) rocks at top of a major granite intrusion.  Main ore minerals are arsenopyrite, pyrrhotite, chalcopyrite, sphalerite, pyrite, gold, and molybdenite.  Veins occur in an minor aureole of altered rock.	Russia

Q54-04	Khotoidokh	Q	54	04	66 26 50N	141 08 39E	66.4472222222222	141.144166666667	6627'N	14109'E	Kuroko Pb-Zn massive sulfide	Pb, Zn, Ag

	Cu, Au, Barite	Average grade of 5.15% Pb, 14.9% Zn, 0.7% Cu, and more than 100 g/t Ag. Known resource of 180,000 t  Pb, 900,000 Zn, 150,000 tonnesCu, about 1,000 tonnes Ag.	Chersky-Argatass	Naumov, written commun. 1987; Danilov and others, 1990.	Consists of a steeply-dipping, stratiform body of massive sulfides, up to 13 m thick and 700 m long that occur in Upper Jurassic sedimentary and volcanic rocks. Mineralization ranges from massive to thin-banded. Main ore minerals are pyrite, galena, chalcopyrite, tetrahedrite, and barite. High concentrations of Ag and Au occur. Wallrocks exhibit propylitic and later quartz-sericite alteration. Deposit hosted mainly in marine clastic sedimentary rocks and intercalated rhyolite lava and tuff, and minor basalt of the Kimmeridgian Dogda suite that is about 450 m thick. Deposit underlain by rhyolite and overlain by siltstone. 	Russia

Q54-05	Uchui	Q	54	05	65 46 34N	138 22 06E	65.7761111111111	138.368333333333	6547'N	13822'E	Au quartz vein	Au		Small.  No data.	Yana-Kolyma	Skornyakov, written commun., 1951; Rozhkov and others, 1964.	Consists of a set of quartz veins in thin sandstone beds.  Veins are short  and cross-cutting with a complex morphology. Veins are up to 250 m long and 26 m thick, and locally grade into sheet stockworks that range from 10 to 20 m thick and to 150 m long.  Six major veins occur.  Major vein minerals are quartz, albite, carbonates, and sericite.  Also occurring are small amounts of arsenopyrite, pyrrhotite, sphalerite, tetrahedrite, chalcopyrite, galena, pyrite, and gold. Disseminated arsenopyrite commonly occurs in wallrocks.  Wallrocks exhibit silica, albite, and carbon alteration. Deposit hosted in Upper Triassic shale that is folded into a major anticline. 	Russia

Q54-06	Tikhon	Q	54	06	65 48 09N	143 27 03E	65.8025	143.450833333333	6548'N	14327'E	Au-Ag epithermal vein	Ag, Au		Small. Average grade of 30-1,257 g/t Ag; up to 10.9 g/t Au.	Dogdo-Erikit	Gamyanin, 1974; Gamyanin and Arkhipov, 1979; Nekrasov and others, 1987; Vladimirtseva, written commun., 1987.	Consists of shear zones and stringers in metasomatically altered and silicified Cretaceous rhyolite.  Deposit occurs along a northeast-striking fault. Deposit up to ten meters thick and up to hundreds of meters long.  Deposit minerals are quartz, adularia, sericite, calcite, pyrite, sphalerite, galena, and dickite. Also occurring is a broad spectrum of Ag minerals, including freibergite, acanthite, pyrargyrite, miargyrite, stephanite, argentopyrite, silver, polybasite, and billingsmith.  Deposit associated with quartz-sericite metasomatic facies that grades into quartz-adularia, quartz-chlorite-kaolinite, and quartz-chlorite-calcite facies.	Russia

Q54-07	Tumannoe	Q	54	07	65 36 26N	138 33 01E	65.6072222222222	138.550277777778	6536'N	13833'E	Au quartz vein	Au		Small.  Average grade of 0.1-177 g/t Au.	Yana-Kolyma	Vladimirtseva, written commun., 1987.	Consists of small, conformable quartz veins hosted in Norian siltstone.  Veins composed of scheelite, galena, sphalerite, chalcopyrite, pyrite, and gold. Sulfide disseminations in in an aureole in host rocks.  	Russia

Q54-08	Svetloe, Medvezhje	Q	54	08	65 39 41N	142 07 07E	65.6613888888889	142.118611111111	6540'N	14207'E	Sn quartz vein and greisen	Sn, W		Small.  Average grade of 0.01-0.38% Sn; 0.4-10% WO3 ; up to 0.1% Mo, Bi.	Yana-Kolyma	Shur, 1985; Vladimirtseva and Vladimirtseva, written commun., 1987.	Consists of quartz veins and muscovite greisen zones that occur near contact of Chibagalak and Porozhnotsepin granite plutons. Vein and greisen occurs both within the plutons and the country rocks.  Veins and greisen zones strike northeast, are thin and short.  Greisen mainly quartz (60-80%) and muscovite (20-40%). Other minerals are chlorite and less than 10% tourmaline.  Main ore mineral are wolframite, arsenopyrite, and cassiterite.  Subordinate minerals are molybdenite, sphalerite, bismuthine, and native bismuth.	Russia

Q54-09	Burkat	Q	54	09	65 35 13N	140 59 25E	65.5869444444444	140.990277777778	6535'N	14059'E	Sn quartz vein	Sn	W	Small. Average grade of 0.2-15% Sn; 0.1-7% WO3 .	Yana-Kolyma	Vladimirtseva and Vladimirtseva, written commun.,  1987.	Consists of seeply dipping quartz and quartz-tourmaline veins and stockworks that range from 0.6 to 2 m thick and up to 600 m long. Veins and stockworks are abundant near the contact of a the Burkat granitoid pluton and occupy an area of 3 km2.  Main ore minerals are cassiterite, with crystals to 3 cm, and wolframite.  Less abundant are asenopyrite, pyrite, chalcopyrite, and bismuthine minerals.  Veins associated with muscovite and tourmaline greisen aureoles.	Russia

Q54-10	Darpir	Q	54	10	65 30 04N	138 54 35E	65.5011111111111	138.909722222222	6530'N	13855'E	Au quartz vein	Au		Small.  No data.	Yana-Kolyma	Skornyakov, written commun., 1951.	Consists of about 70 quartz and quartz-carbonate veins hosted in Upper Triassic sandstone and shale.  Most veins strike northeast and range up to 200 m long and from 0.5 to 0.8 m thick.  Vein zone extends for 30 km. Vanina, Malyutka, Iskra, and Dar veins are most important and consist of lenses up to 60 to 80 m long.  Ore minerals are arsenopyrite, galena, and native gold (fineness 789).  Shale exhibits minor chlorite, carbon, and pyrite alteration. Sandstone locally altered to beresite.	Russia

Q54-11	Imtachan	Q	54	11	65 32 24N	140 17 33E	65.54	140.2925	6532'N	14018'E	Au quartz vein	Au		Small.  No data.	Yana-Kolyma	S.I. Gavrikov, B.A. Onishinko, Timopheev, written commun., 1962; Goryachev, 1985; V.A. Amuzinskyi, G.S. Anisimova, and Ya.Yu. Zhdanov, written commun., 1992.	Consists of two steeply-dipping, subparallel quartz veins that are 0.65 and 1.8 m thick and from 150 to 250 m long.  In plan view veins cut at an acute angle a complex gabbro-diabase and granite-porphyry dike that is 33-50 m thick and dips steeply SE.  Veins  have apophyses from 20 to 50 m long. Ore minerals are arsenopyrite, galena, sphalerite, tetrahedrite, and native gold (fineness 845).  Gabbro-diabase and grandiorite-porphyry exhibit chlorite, quartz, and beresite alteration, and contain disseminated arsenopyrite and pyrite.  Alteration zones range up to 2 m thick. Deposit hosted in Upper Triassic sedimentary rocks.  	Russia

Q54-12	Yukhondja	Q	54	12	65 28 08N	140 32 08E	65.4688888888889	140.535555555556	6528'N	14032'E	Au quartz vein	Au		No data.	Yana-Kolyma	Goryachev, 1981.	Consists of two quartz veins composed of quartz, muscovite, and calcite. Veins range up to 1 m thick and 50 m long and are hosted in Upper Triassic siltstone.  Ore minerals are Ag tetrahedrite, pyrite, scheelite, arsenopyrite, native gold (fineness 570-620), and very scarce galena.  K-Ar isotopic age of 131 Ma for vein muscovite.  Wallrocks exhibit minor beresite alteration.	Russia

Q54-13	Khaptagai-Khaya	Q	54	13	65 24 24N	142 59 39E	65.4066666666667	142.994166666667	6524'N	14260'E	Au quartz vein	Au		Small.  Average grade of 5-30 g/t Au; locally up to 3,861.4 g/t Au.	Yana-Kolyma	Rozhkov and others, 1971; Shur, 1985; Vladimirtseva, 1987.	Consists of subparallel low-sulfide quartz veins and stringers that occur en-echelon in the Khaptagai-Khaya granite-porphyry stock that intrudes Upper Triassic sandstone and shale. Ore minerals are arsenopyrite, pyrite, sphalerite, galena, gold sulfosalts (fineness 759), and sometimes scheelite.  Later-stage quartz-stibnite veins cut the gold-quartz veins and are variably oriented.  Granite-porphyry exhibits intense beresite alteration.  Veins strike 20-60 northeast.  Deposit contains thirty veins that range up to 1 m thick;  associated stringers range up to 3 m. Veins form knee morphology with a 90 bend. 	Russia

Q54-14	Solkuchan (Khatys)	Q	54	14	65 15 04N	143 50 51E	65.2511111111111	143.8475	6515'N	14351'E	Sn polymetallic vein	Ag, Sn	Pb, Zn	Medium.  Average grade of 200 g/t Ag, 0.04 to 2.16% Sn, 0.03 to 2.71% Pb, 0.02 to 5.85% Zn.	Dogdo-Erikit	Khaustova and Vladimirtseva, written commun., 1987; Nekrasov and others, 1987; Shkodzinsky and others, 1992.	Consists of three steeply-dipping quartz-carbonate-sulfide veins that occur in a Early Cretaceous subvolcanic dacite stock. Veins range up to 3.4 m thick and up to 900 m long. Ore minerals are pyrite, pyrrhotite, arsenopyrite, sphalerite, galena, Ag-tetrahedrite (31-39% Ag), boulangerite, pyrargyrite, canfieldite, electrum (fineness 685), cassiterite, covellite, scorodite, cerussite, smithsonite, melnikovite, and Fe-hydroxides. Anomalous Cu, Sb, Ge, and Id occur.	Russia

Q54-15	Zhdannoe	Q	54	15	64 57 06N	141 07 05E	64.9516666666667	141.118055555556	6457'N	14107'E	Au quartz vein	Au		Small. Average grade of 22-95 g/t Au. Mined out.	Yana-Kolyma	Gavrikoy and Zharova, 1963; Rozhkov and others, 1971; Vladimirtseva, written commun., 1987; V.A. Amuzinskyi, G.S. Anisimova, and Ya.Yu. Zhdanov, written commun., 1992.	Consists of a set of 13 interbedded veins that range from 0.1 to 3 m thick and to 500 m long. Some ore bodies occur in cross-cutting fissures. Ore minerals are arsenopyrite, pyrite, galena, sphalerite, native gold (fineness 848), and very scarce boulangerite and chalcopyrite.  Pre-mineral content of quartz veins is 1 to 3%.  Veins accompanied by minor wallrock alteration to bersite. Deposit occurs in the hinge of a brachyanticline at its periclinal closure and is hosted Upper Triassic (Carnian) silty shale and sandstone. 	Russia

Q54-16	Alyaskitovoe	Q	54	16	64 47 50N	141 52 21E	64.7972222222222	141.8725	6448'N	14152'E	Sn-W greisen	Sn, W		Small. Average grade of 0.45-1.33% WO3 ; up to 0.38% Sn. Partly mined.	Yana-Kolyma	Shur, 1985; Vladimirtseva and Vladimirtseva, written commun., 1987.	Consists of veins and greisen that occur inside and adjacent to a stock of two-mica granite that intrudes Upper Triassic sandstone and shale.  Variable thickness and length. Veins occur in fissures that strike north-northeast and dip northwest at 75-85.  Veins have complex morphology with lenses that occur en echelon and that alternate with thin stringers.  Main ore minerals are wolframite, cassiterite, and arsenopyrite.  Gangue minerals are mainly quartz, muscovite, tourmaline, and apatite.  A complex combination of sulfosalts of lead, silver, and bismuth occur in veins.  Wallrocks exhibit quartz-muscovite, muscovite-apatite, and tourmaline greisen alteration	Russia

Q54-17	Tuora-Tas	Q	54	17	64 44 55N	142 43 03E	64.7486111111111	142.7175	6445'N	14243'E	Au quartz vein	Au		No data.	Yana-Kolyma	Rozhkov and others, 1971; Shur, 1985.	Consists of a set of small, thin veins that are hosted in Upper Triassic (Carnian) sandstone.  Both cross-cutting and conformable veins occur. Veins composed of quartz, chlorite, rare carbonate, albite, and muscovite.  Main ore minerals are arsenopyrite, pyrite, galena, and native gold (fineness 884).  Also occurring are rare sphalerite, chalcopyrite, and scheelite.  Minor beresite alteration also occurs in wallrocks that are deformed into low-amplitude folds with widths to 500 to 800 m; and are cut with numerous fissures. Diorite-porphyrite dikes also occur within the ore field. 	Russia

Q54-18	Sokh	Q	54	18	64 45 05N	143 50 16E	64.7513888888889	143.837777777778	6445'N	14350'E	Au quartz vein	Au		Small. Average grade of 16.3-57.5 g/t Au; contains up to 1,745 g/t Au. 	Yana-Kolyma	Vladimirtseva, written commun., 1987; Yakutia Gold Occurrences Atlas, 1992.	Consists of small cross-cutting and conformable gold-quartz veins that are hosted in Triassic sandstone and shale.  Both cross-cutting and conformable veins occur.  Main ore minerals are arsenopyrite, galena, sphalerite, and native gold (fineness 883). Chlorite and sericite also occur in veins.	Russia

Q54-19	Bazovskoe	Q	54	19	64 42 28N	141 25 32E	64.7077777777778	141.425555555556	6442'N	14126'E	Au quartz vein	Au		No data.	Yana-Kolyma	Snyatkov, 1958; Rozhkov and others, 1971.	Consists of shear zones hosted in Upper Triassic (Norian) sandstone and shale. Shear zones contain densely-packed quartz veins and stringers with variable orientation and thickness.  Veins and stringers dip steeply to southwest and to northeast.  Shear zones range up to 100 m thick, up to several hundred meters long. Zones divided into Western, Central, and Eastern shear zones.  In addition to quartz, veins contain carbonate, chlorite, and albite.  Ore minerals are mainly arsenopyrite, galena, and native gold (fineness 823).  Scheelite, sphalerite, and pyrite are scarce.  Wallrock exhibit beresite alteration.	Russia

Q54-20	Erel	Q	54	20	64 30 13N	138 25 25E	64.5036111111111	138.423611111111	6430'N	13825'E	Clastic sediment-hosted Hg	Hg		Small. Average grade of 0.65% Hg.	Verkhoyansk-Indigirka 	Vladimirtseva, written commun., 1987.	Consists of three steeply-dipping ore bodies that occur in zones of brecciated Triassic sandstone that are cemented with quartz and carbonate.  Ore bodies range from 2.8 to 7 m thick and up to 50 m long.  Minerals include cinnabar, with less than 1% pyrite and arsenopyrite. Gold is very scarce.	Russia

Q54-21	Talalak	Q	54	21	64 31 49N	141 42 32E	64.5302777777778	141.708888888889	6432'N	14143'E	Au quartz vein	Au		Medium. Average grade of 39.6 g/t Au for vein No. 1. Partly mined. 	Yana-Kolyma	Snyatkov, 1958; Arsky, 1966; Vladimirtseva, written commun.,1987; Rozhkov and others, 1971. 	Consists of interbedded quartz veins that range from 0.15 to 3.4 m thick and are about 100 m long.  Veins vary from lens-like to platyform.  Veins composed of quartz, ankerite, sericite, albite, and potassium feldspar.  Ore minerals are arsenopyrite, pyrite, chalcopyrite, galena, tetrahedrite, bournonite, boulangerite, and native gold (fineness 954).  Wallrocks exhibit beresite alteration. Deposit occurs in the hinge of the Talalak anticline and is hosted Upper Triassic (Lower Carnian) siltstone and shale. 	Russia

Q54-22	Dirin-Yuryak	Q	54	22	64 25 10N	142 19 28E	64.4194444444444	142.324444444444	6425'N	14219'E	Au  quartz vein	Au		Range of 0.1-3,988 g/t Au. Average grade of 226 g/t Au.	Yana-Kolyma	Snyatkov, 1958; Rozhkov and others, 1971; Vladimirtseva, written commun., 1987; Yakutia Gold Occurrences Atlas, 1992.	Consists of several veins that occur subconformable to bedding in Upper Triassic (Carnian) shale that is exposed in the hinge of an anticline.  Veins range from 0.01 tp 1 m thick.  Veins composed of quartz, carbonate minerals, chlorite, sericite, and albite.  Main ore minerals are pyrite, arsenopyrite, galena, tetrahedrite, bournonite, and native gold (fineness 963). Sphalerite and chalcopyrite are scarce.	Russia

Q54-23	Sarylakh	Q	54	23	64 16 32N	142 46 18E	64.2755555555556	142.771666666667	6417'N	14246'E	Sb-Au vein	Au, Sb		Large?  Up to 60% Sb; up to 10,000 g/t Au. Average mining grade of 6% Sb and 6 g/t Au. Mined and proven reserves of 130,000 tonnes antimony. 	Adycha-Taryn	Anasenko and Bichok, 1970; Berger, 1978; Zharikov, 1978; Indolev and others, 1980; Shur, 1985; Vladimirtseva, written commun., 1987; Yakutia Gold Occurrences Atlas, 1992.	Occurs in Adycha-Taryn fault zone. Hosted in Upper Triassic (Norian) sandstone and shale. Consists of three rod-like stibnite veins that occur in shear zones that feather along the main fault.  Ore body No. 1, the major deposit, varies from 0.2 to 5 m thick and dips steeply northeast at 55-80, and extends for several hundred m along strike and down-dip. Deposit is very complex, and ranges from massive antimony  to disseminations and stringers.  Deposit predominatly stibnite (40-80%) and quartz (10-60%).  Rare minerals are arsenopyrite, pyrite, muscovite, ankerite, berthierite, native gold (fineness 983), native antimony, aurostibnite, chalcostibnite, and other sulfosalts.  Native aluminum and chromium occur.  Host rocks are intensely altered to beresite and argillite. 	Russia

Q54-24	Badran	Q	54	24	64 11 44N	141 40 39E	64.1955555555556	141.6775	6412'N	14141'E	Au quartz vein	Au		No data.	Yana-Kolyma	Akhyaev and others, written commun., 1981; Amuzinsky and others, 1989; Anisimova and others, written commun., 1990; Yakutia Gold Occurrences Atlas, 1992; 	Consists of a long vein that intrudes a thrust fault dips gently north-northeast at 25-27. Thrust fault about 10 m thick and occurs in folded Upper Triassic sandstone and shale.  Vein exhibits complex morphology, is highly convoluted, and trails off along strike as discrete lenses.  Main ore body occurs in an area where fault changes strike.  Minerals are pyrite, arsenopyrite, fahlore, sulfosalts of Pb, Cu and Ag, and native gold (fineness 896-920).  Gold occurs in ribbon-like forms within the vein.  Deposit is highly-oxidized with Cu, Fe, and Sb sulfates.  	Russia

Q54-25	Selerikan	Q	54	25	64 13 18N	140 24 44E	64.2216666666667	140.412222222222	6413'N	14025'E	Sb vein	Sb		No data.	Verkhoyansk-Indigirka 	Indolev and Krimov, 1979.	Deposit occurs in the Ayabin thrust fault that occurs conformable to a small northwest-trending anticline formed in Upper Norian sandstone.  Ore body exhibits a complex morphology and consists of two quartz-stibnite veins that alternate with small stringers and lenses of stibnite.  Pyrite also occurs.	Russia

Q54-26	Seikimyan	Q	54	26	64 07 37N	139 51 48E	64.1269444444444	139.863333333333	6408'N	13952'E	Clastic sediment-hosted Hg	Hg		Up to 0.1-0.5% Hg.	Verkhoyansk-Indigirka 	Klimov, 1979; Vladimirtseva, written commun., 1987.	Consists of stringers and disseminations.  Major minerals are quartz, dickite, cinnabar, calcite, pyrite; and rare galena, sphalerite, and arsenopyrite. Deposit hosted in feathered shear and breccia  zones that range from 0.4-7 by 50-200 m, in sandstone.  Deposit occurs on northeastern limb of an anticline formed in Upper Triassic sandstone and siltstone.  Deposit is bounded by faults that occur parallel to the major, regional Bryungadin fault. 	Russia

Q54-27	Sana	Q	54	27	64 07 42N	143 04 22E	64.1283333333333	143.072777777778	6408'N	14304'E	Au quartz vein	Au		Small.  No data.	Yana-Kolyma	Skornyakov, written commun., 1951; Rozhkov and others, 1971; Yakutia Gold Occurrences Atlas, 1992; Sustavov, 1993.	Consists of a set of small, interbedded, cross-cutting quartz veins that intrude siltstone and argillite layers in Upper Triassic sandstone.  Veins range from 0.05 to 1 m thick and up to 450 m long.  Three prominent veins occur; one has been prospected.  Major gangue minerals are quartz,  wide-spread carbonate minerals, adularia, chlorite, and albite. Major ore mineral is aresenopyrite along with pyrite, galena, gold (native 892), sphalerite, tetrahedrite, and scheelite are less wide-spread.  Wallrock s altered to minor beresite and adularia.	Russia

Q54-28	Bekkem	Q	54	28	64 03 34N	142 37 10E	64.0594444444444	142.619444444444	6404'N	14237'E	W-Mo-Sn vein and greisen	W	Mo, Sn	Small. Average grade of 1.56% WO3; up to 0.42% Mo; 0.01-0.18% Sn.  	Yana-Kolyma	Shur, 1985; Vladimirtseva and Vladimirtseva, written commun., 1987.	Consists of a set of 30 subhorizontal veins that occur in the apical portion of a granite stock that intrudes Upper Triassic sandstone and shale.  Veins range from 0.3 to 0.9 m thick and up to 650 m long.  Major and minor minerals are quartz, tourmaline, wolframite, arsenopyrite, molybdenite, cassiterite, scheelite, pyrite, chalcopyrite, bismuthine, and galena are predominant.  Deposit is vertically zoned, with wolframite, tourmaline, and quartz occurring in the upper portion, and molybdenite, sulfides, and quartz occurring in the lower portion. Veins assocated with greisen aureoles up to 3 m thick.	Russia

Q54-29	Maltan	Q	54	29	64 02 39N	143 18 31E	64.0441666666667	143.308611111111	6403'N	14319'E	Sb-Au vein	Au, Sb		Medium.  Average grade of 10.8% Sb; 8.87 g/t Au.	Adycha-Taryn	Indolev and others, 1980; Vladimirtseva, written commun., 1987; Yakutia Gold Occurrences Atlas, 1992.	Consists of lens-like veins, shear zones, and stringers that either intrude ore are subconformable to Upper Triassic siltstone.  Ore bodies are about 10 m and about 100 meters long.  Veins and stringers intruded by a diorite-porphyrite dike with a K-Ar isotopic age of 140 Ma.  Two mineral assemblages occur: (1) an early-formed assemblage of arsenopyrite-sulfostibnite with native gold (fineness 800-900); and (2) a late-formed assemblage of stibnite-berthierite with native gold (fineness 966).  Early assemblage consists of quartz and ankerite, as well as pyrite, arsenopyrite, sphalerite, chalcopyrite, galena, tetrahedrite, chalcostibite, bournonite, and jamesonite.  Late assemblage consists of quartz, stibnite, and berthierite, and also pyrite, ankerite, and dickite.  Wallrocks altered to beresite and younger argillite.  Altered rocks contain abundant needle, disseminated arsenopyrite.	Russia

Q55-01	Shirokoe	Q	55	01	65 35 48N	144 33 07E	65.5966666666667	144.551944444444	6536'N	14433'E	Au-Ag epithermal vein	Au, Ag		Small. 1.6-4.2 g/t Au; 4-560 g/t Ag.	Dogdo-Erikit	Vladimirtseva, written commun., 1987.	Consists of a northeast-trending zone of disseminated minerals in quartz vein and silicified zone that ranges from 2 to 3 m thick and up to 700 m long. Vein intrudes Upper Jurassic(?) rhyolite.  Deposit best developed in a 100-m-long zone at the southeast end of the vein.  Major minerals are pyrite, goethite, and pyrargyrite. Host rhyolite is intensely silicified.	Russia

Q55-02	Mitrei	Q	55	02	64 57 29N	144 00 50E	64.9580555555556	144.013888888889	6457'N	14401'E	Au quartz vein   	Au		Small.  	Yana-Kolyma	Rozhkov and others, 1971	Thin quartz veins and veinlets cut dikes of rhyolite-dacite composition of Late Jurassic and Early Cretaceous age. Dikes altered to beresite.  Mineral associations are:  arsenopyrite-pyrite-quartz; albite-muscovite with chalcopyrite and sphalerite; gold-tetrahedrite-buornonite; gold-jamesonite-zinkenite; and post-ore, quartz-carbonate-chlorite.	Russia

Q55-03	Agyndja	Q	55	03	65 12 56N	148 01 58E	65.2155555555556	148.032777777778	6513'N	14802'E	Basaltic Cu and sediment-hosted Cu	Cu		Large.  Average grade about 1% Cu.  	Rassokha	Shpikerman and others, 1988	Disseminated and vein-like ore bodies, and less common breccia ores, occur in red, amygdaloidal trachybasalt and sandstone of Middle to Upper Ordovician age.  Ore minerals are bornite, chalcocite, chalcopyrite, covellite, and locally native copper.  Copper minerals in trachybasalt occur in amygdules and synvolcanic fissures in the upper portion of lava flows.  Ore minerals occur both as cement and as clasts in sandstone.  The bottom of stratified ore bodies is commonly composed of mineralized trachybasalt overlain by copper-bearing sandstone.  The deposit extends over about 100 km2.  Individual ore horizons are 1 to 30 m thick and trend northwest.  Ore-bearing sequence is broken by faults of diverse orientation, including numerous thrust faults which repeat the mineralized horizons.	Russia

Q55-04	Vesnovka	Q	55	04	64 32 25N	149 22 58E	64.5402777777778	149.382777777778	6432'N	14923'E	Kipushi Cu-Pb-Zn   	Cu, Pb, Zn, Ge		Small.  	Omulevka River	V.I. Shpikerman, oral commun., 1989	Vein and disseminated ore occurs in Middle Ordovician limestone, shale, and siltstone.  Ore bodies trend east-west and occur as metasomatic replacements conformable to bedding.  Dimensions and morphology of ore bodies are not well defined.  Ore minerals include sphalerite, galena, chalcopyrite, and renierite(?).  The calcareous siltstone which hosts the ore bodies is silicified and cut by calcite veins.	Russia

Q55-05	Omulev	Q	55	05	64 12 37N	148 22 39E	64.2102777777778	148.3775	6413'N	14823'E	Stratabound W  	W		Small.  Average grade up to 1% WO3.  	Omulevka River	Shpikerman and others, 1986	Deposit consists of veins in Middle Ordovician black carbonaceous, calcareous siltstone.  The main ore mineral is scheelite.  Pyrite, antimonial realgar, orpiment, galena, and chalcopyrite are locally present.  Ore minerals are restricted to a conformable, thin layer that is intricately folded along with adjacent rocks, all of which were subjected to greenschist-facies metamorphism.  Deposit occurs in a core of a large, open, northwest-trending anticline.  No magmatic rocks occur nearby.  Mineralized area covers about 100 km2.	Russia

Q55-06	Khangalass	Q	55	06	64 02 54N	144 48 53E	64.0483333333333	144.814722222222	6403'N	14449'E	Au quartz vein   	Au		Small.  	Yana-Kolyma	Rozhkov and others, 1971	Conformable and cross-cutting quartz lenses with albite, ankerite, muscovite, disseminated pyrite, arsenopyrite, galena, sphalerite, chalcopyrite, marcasite, and gold occur in Lower and Middle Triassic sandstone and shale that folded into an open anticline.	Russia

Q55-07	Tunguss	Q	55	07	64 08 37N	146 16 20E	64.1436111111111	146.272222222222	6409'N	14616'E	Au quartz and Sb vein   	Au, Sb		Small.  	Yana-Kolyma	Rozhkov and others, 1971	Quartz veins occur near the contact of an Upper Jurassic to Early Cretaceous granite porphyry dike.  Mineral associations are:  arsenopyrite-pyrite-quartz; albite-muscovite with chalcopyrite and sphalerite; tetrahedrite-bournonite; lead sulfo-antimonides with gold; and quartz-stibnite with berthierite and zinkenite; which formed during the last stage of mineralization.	Russia

Q55-08	Darpir	Q	55	08	64 01 55N	147 42 09E	64.0319444444444	147.7025	6402'N	14742'E	Sn silicate-sulfide vein   	Sn	Zn	Medium.  Average grade about 0.5% Sn.  	Darpir	Klochkov and others, written commun., 1979	A set of quartz-chlorite, quartz-tourmaline, and, less common quartz veins and lenses, occur in contact-metamorphosed, Lower and Middle Jurassic clastic sedimentary rocks.  Ore bodies occur about 2.0-2.5 km from the contact of the Darpir granite pluton.  More than 20 veins are known, most of which trend northeast and about east-west, with dips of 50-85.  Veins are up to 200 m long and 0.4 to 2.7 m thick.  Ore minerals are cassiterite, sphalerite, pyrite, arsenopyrite, and locally galena, and titanomagnetite; all of which occur as disseminations and sulfide segregations in veinlets.  An and Sn are the most important commodities.  Wall rocks are commonly tourmalinized.	Russia

Q56-01	Slezovka	Q	56	01	66 51 08N	153 54 29E	66.8522222222222	153.908055555556	6651'N	15354'E	Southeast Missouri Pb-Zn 	Pb, Zn		Small.  	Yarkhodon	Artemov and others, written commun., 1976	Vein, disseminated, and breccia ores occur in Middle Devonian clastic sedimentary rocks and carbonates, in association with a mineralized dolomite sequence in a synclinal fold.  Deposit is made up of 5 mineralized beds, each 3-5 m thick, separated by barren interbeds 3-10 m thick.  Ore minerals include galena, sphalerite, pyrite, and barite.  Ore bodies are cut by quartz and calcite veinlets.	Russia

Q56-02	Gornoe	Q	56	02	66 36 11N	154 19 29E	66.6030555555556	154.324722222222	6636'N	15419'E	Southeast Missouri Pb-Zn   	Pb, Zn		Small.  	Yarkhodon	Nikolaev, written commun., 1972	Vein, disseminated, and breccia ores occur in clastic and carbonate rocks from a Middle Devonian continental shelf environment.  Mineralization is near a tectonic contact with Upper Proterozoic sedimentary rocks.  Host rocks are fossiliferous dolomite.  Ore minerals include abundant galena, sphalerite, chalcopyrite, hematite, pyrite, limonite, magnetite, malachite, azurite, cerussite, wulfenite, barite, and calcite.  Brachiopods are replaced with galena locally, but more often, galena forms replacement bodies in dolomite or cement in breccia ore.	Russia

Q56-03	Pobeda	Q	56	03	65 43 23N	152 12 04E	65.7230555555556	152.201111111111	6543'N	15212'E	Ironstone   	Fe		Medium. Proven reserves 2.8 million tonnes Fe.  Estimated resources of 18 million tonnes Fe.  Grade ranges from 46-70% Fe.  	Oroek	Potapova, written commun., 1954; Kravchenko and others, written commun., 1979; Kats, written commun., 1979.	Stratiform hematite occurs in Upper Proterozoic dolomitic marble in a zone of imbricated thrust faults.  Gabbro and gabbro-amphibolite bodies with hematite occur along thrust fault planes.  Mineralization includes massive, brecciated, and stockwork ores.  Massive ores contain up to 70% iron.  Brecciated ores are composed of clasts of hematized dolomite and gabbro-amphibolite cemented by hematite.  Stockwork ore forms separate halo-shaped bodies around the massive and brecciated ores.  Ores also contain calcite, quartz, barite, chlorite, pyrite, chalcopyrite, galena, and malachite.  Ore-bearing horizon extends for 18 km, but the best defined stratiform deposit is 150 to 600 m long and 2 to 20 m thick.  Mineralized dolomite is underlain by hematitic sandstone with up to 34% iron.	Russia

Q56-04	Kopach	Q	56	04	65 21 18N	152 57 10E	65.355	152.952777777778	6521'N	15257'E	Au quartz vein   	Au		Small.  Grab samples with up to 12 g/t Au, 0.3% Cu, and 0.1% Pb.  	Shamanikha	Semenov and others, written commun., 1974	Disseminated and vein occurs in metarhyolite and biotite-amphibole-chlorite-quartz schist of Upper Proterozoic age.  Wall-rock alteration includes silicification, epidotization, and sulfidization.  Ore minerals are pyrite, magnetite, hematite, goethite, and native gold.  Ore bodies contain 10 to 20% quartz.  Ore veins are localized along the contacts of metarhyolite bodies; both within them and in adjacent rocks.  Veins vary in thickness from 8 cm to 2 m and are often associated with boudinage structures.  Ore is confined to selvages of veins.  Basalt dikes cut the metarhyolite bodies.	Russia

Q56-05	Glukhariny	Q	56	05	64 57 44N	153 03 59E	64.9622222222222	153.066388888889	6458'N	15304'E	Au quartz vein   	Au		Small.  Grab samples with up to 25 g/t Au and up to 50 g/t Ag.  	Shamanikha	Lutskin, written commun., 1964; Semenov, written commun., 1974	Gold in quartz-chlorite-epidote schist, quartzite, and metarhyolite of Upper Proterozoic age; and in quartz-cemented breccias in these rocks.  Wall rocks are metamorphosed to upper greenschist facies.  Ore minerals are native gold, pyrite, galena, chalcopyrite, arsenopyrite, and hematite.  Ore minerals occur in three east-west trending zones up to 1,200-4,000 m long and 400 to 900 m wide.	Russia

Q56-06	Oroek	Q	56	06	64 54 09N	152 47 37E	64.9025	152.793611111111	6454'N	15248'E	Sediment-hosted Cu   	Cu		Small.  Contains 0.2 to 4% Cu (average grade of 1.0%); up to 44 g/t Ag,  up to 7 g/t Au.  Probable resource of 5 million tonnes Cu.	Oroek	Volkodav and Korobitsyn, written commun., 1979	Stratiform copper deposits in an Upper Proterozoic volcaniclastic sequence 150-180 m thick.  Sequence is dominated by quartzite, chlorite and graphite-chlorite shale, and phyllite.  Thin conformable beds of basalt and tuffaceous rocks occur.  Copper occurs as chalcocite, bornite, and chalcopyrite in the metamorphosed sandstone, siltstone, and shale.  Ore-bearing sequence contains many quartz boudins with chalcopyrite, bornite, and hematite.  Later cross-cutting quartz veins also contain minor malachite, chalcocite, azurite, chrysocolla, bornite, and native copper.  Mineralized rocks are deformed and form an overturned, isoclinal fold whose limbs dip southeast at 40-90.	Russia

Q56-07	Rogovik	Q	56	07	64 17 52N	153 58 23E	64.2977777777778	153.973055555556	6418'N	15358'E	Au-Ag epithermal vein	Ag, Au		Medium.  Contains 0.5 to 34 g/t Au and 2.7 to to 747 g/t Ag.  	Eastern Asia-Arctic: Omsukchan	Umitbaev, 1986	Area underlain by Triassic sedimentary rocks with a complicated block structure and widespread explosive (cryptovolcanic) breccias that occur in a series of graben-like depressions and cross structures.  Breccias and sedimentary rocks are locally intensely altered, and contain veins and veinlets of banded quartz with adularia, argentite, and pyrargyrite with Ag and Au values.

	Russia

Q57-01	Dalny	Q	57	01	67 31 23N	160 49 04E	67.5230555555556	160.817777777778	6731'N	16049'E	Porphyry Cu-Mo and polymetallic vein	Cu, Mo, Au		Small.  	Oloy	Gorodinsky, Gulevich, and Titov, 1978	Stockwork made up of a network of quartz, carbonate-quartz, and quartz-sulfide veinlets 0.3-5 mm thick that contain fine-grained disseminated pyrite, pyrrhotite, chalcopyrite, and magnetite, and lesser galena, sphalerite, arsenopyrite, and molybdenite.  Ore bodies occur in an Early Cretaceous intrusive complex, including syenite-diorite porphyry and quartz syenite porphyry, which intrudes Upper Triassic shale.  Wall rocks adjacent to the plutonic rocks are altered to quartz and potassium feldspar, and quartz-biotite and quartz-sericite-chlorite metasomatites.  Occurrences of gold and several other metals are widespread near the periphery of the plutonic complex.	Russia

Q57-02	Innakh	Q	57	02	67 17 04N	159 22 26E	67.2844444444444	159.373888888889	6717'N	15922'E	Polymetallic vein and Porphyry Cu-Mo  	Cu, Mo, Au		Small.  	Oloy	Gorodinsky and others 1974; Goryachev and Polovinkin, 1979.	Quartz and quartz-carbonate veins several tens of meters long contain masses and disseminations of pyrite, chalcopyrite, molybdenite, magnetite, galena, sphalerite, arsenopyrite, lellingite, tetrahedrite, and native bismuth.  Gold is associated with pyrite and other sulfides, magnetite, and tetrahedrite ores.  Veins occur in contact-metamorphosed siltstone about 1.5-2 km from a Cretaceous gabbro-monzonite-syenite pluton; especially near diorite and monzodiorite dikes.  Pluton itself is characterized by small stockwork zones of gold-molybdenite-pyrite-chalcopyrite deposits.  Ore bodies are associated with two tectonic zones; one trends northwest, and the other about north-south.	Russia

Q57-03	Klen	Q	57	03	67 07 41N	161 13 07E	67.1280555555556	161.218611111111	6708'N	16113'E	Au-Ag epithermal vein	Au, Ag		Medium.  Grade ranges from traces up to 380.5 g/t Au and up to 1067.9 g/t Ag.  	Oloy	Gorodinsky and others, 1974; Shilo and others, 1975	Steeply-dipping carbonate-quartz veins trending northwest are several hundreds of meters to 1300 m long.  The veins contain disseminated pyrite, chalcopyrite, arsenopyrite, gold, argentite, and freibergite; in propylitized, silicified, and sericitized Cretaceous volcanic rocks.  Au/Ag ratio in the ores is about 1:3.	Russia

Q57-04	Berezovska	Q	57	04	66 42 34N	157 21 19E	66.7094444444444	157.355277777778	6643'N	15721'E	Polymetallic vein and Kuroko massive sulfide	Pb, Zn, Cu, Ag		Small.  Average grade of 4.07% Pb, 6.89% Zn, 0.03% Cu, 250.3 g/t Ag.  	Berezovka	Gorodinsky and others, 1974;  N.A. Bobrov,  written commun., 1976;  V. Shpikerman, this report.	Silver-bearing concordant quartz-sulfide veins and stratiform barite-sulfide bodies occur in Upper Devonian carbonate and volcaniclastic rocks.  Major sulfides are galena and sphalerite.  	Russia

Q57-05	Zet	Q	57	05	65 18 11N	156 57 13E	65.3030555555556	156.953611111111	6518'N	15657'E	Au-Ag epithermal vein	Au, Ag		Small.  	Kedon	Kovalchuk and others, written commun., 1969; Shamin and others, written commun., 1983	Mineralized quartz and chalcedony-quartz veins, veinlets, and breccias are transitional into quartz-carbonate-hydromica and adularia-chlorite-quartz metamorphic rocks.  Vein contacts are not well defined.  Disseminated and masses of pyrite, hematite, and galena are present; sphalerite, chalcopyrite, molybdenite, arsenopyrite, and pyrargyrite are less abundant.  Gangue minerals include amethyst, kaolinite, and fluorite.  Gold is finely dispersed in the ore; the Au/Ag ratio is 1:5.  Deposit occurs in Middle to Upper Devonian dacite tuff.  Gold-silver ore bodies occur within a zone that is generally about 200-250 m wide, but may be as much as 500-700 m wide if low-grade off-shoots are included.  District extends northeast for 3-4 km.	Russia

Q57-06	Medgora	Q	57	06	65 17 13N	159 31 52E	65.2869444444444	159.531111111111	6517'N	15932'E	Mo-Cu skarn	Mo, Cu		Medium. Average grade of 0.1 to 0.64% Mo, 0.94 to 2.94% Cu, and 0.4 g/t Au.  	Left Omolon	Gorodinsky, Gulevich, and Titov, 1978.	Consists of disseminated veinlets containing molybdenum and copper mineralization that are associated with the Early Cretaceous Medgora granite-granodiorite intrusion.  Metallic minerals are pyrite, chalcopyrite, molybdenite, pyrrhotite, magnetite, hematite, and sphalerite.  Skarn bodies associated with the intrusion are composed of garnet, pyroxene, actinolite, scapolite, calcite, quartz, chlorite, epidote, and green mica.  Individual ore zones extend for 30-160 m.  Copper content of the ore varies from hundredths of a percent to over 2%.	Russia

Q57-07	Olcha	Q	57	07	64 56 52N	156 26 28E	64.9477777777778	156.441111111111	6457'N	15626'E	Au-Ag epithermal vein	Au, Ag	Hg, Cu, Mo	Medium.  Grade ranges 0.5 to 273 g/t Au and 26.3 to 4978 g/t Ag. Inferred resource of approximately 50 tonnes Au.	Kedon	Zagruzina and Pokazaniev, 1975; Pokazaniev, 1976a, b; I.N. Kotlar,  written commun., 1984.	Ore bodies consist of steeply dipping quartz, carbonate-quartz, and adularia-quartz veins and stockwork zones, which range from several tens of meters to 1300 m long.  They are hosted in Middle to Late Devonian volcanic rocks of the Kedon series.  Veins occur along fractures, mainly within extrusive andesite breccia of the volcanic vent facies, and more rarely, in hypabyssal dacite-porphyry bodies and felsic extrusive rocks.  Ore minerals include gold (500-700 fine), chalcopyrite, argentite, polybasite, galena, sphalerite, pyrite, hematite, manganese oxides, stromeyerite, tetrahedrite, native silver, and tellurides.  Gangue minerals are quartz and adularia, with lesser calcite, dolomite, rhodochrosite, and barite.  Gold and silver is associated with mercury, copper, molybdenum, lead, zinc, manganese, and arsenic.  Ore minerals are accompanied by propylitic and quartz-sericite alteration.  Gold-silver ore bodies are controlled by arcuate faults around a volcano-tectonic depression over a basement composed of Archean metamorphic rocks and Early Paleozoic(?) carbonate and clastic sedimentary rocks.  Adularia from quartz veins has been dated by K-Ar as 268 Ma and by Rb-Sr as 251 Ma.  More recent K-Ar dating of adularia from gold-bearing veins yeilded an age of 318 Ma.  	Russia

Q57-08	Obyknovennoe	Q	57	08	64 52 19N	158 38 48E	64.8719444444444	158.646666666667	6452'N	15839'E	Au-Ag epithermal vein	Au, Ag		Estimated about 5 tonnes Au ore averaging 29.6 g/t Au and 68 g/t Ag.  	Kedon	Burenkova, written commun., 1989	Northwest trending zones of adularia-quartz veins and veinlets in extrusive bodies of intensely silicified and sericitized, fluidal rhyolites of the Kedon series.  Dominant ore minerals are galena, sphalerite, pyrite, bornite, electrum, and silver sulfosalts.  The Au/Ag ratio is 1:2 or 1:3.  Ore zones extend for 400 m and range up to 120 m thick.	Russia

Q57-09	Bebekan	Q	57	09	64 21 38N	160 21 46E	64.3605555555556	160.362777777778	6422'N	16022'E	Porphyry Cu-Mo   	Mo, Cu		Small to medium.  Average grade about 0.5% Mo, 0.7% Cu with minor Pb, Zn, W, Au, and Ag.  	Left Omolon	Alekseenko, Korobeinikov, and Sidorov, 1990	Stockwork of sulfide-quartz veinlets with disseminated molybdenite, chalcopyrite, pyrite, sphalerite, pyrrhotite, arsenopyrite, bornite, and covellite.  Deposit occurs in an Early Cretaceous stock of porphyritic granodiorite.  Ore body is confined to silicified and sericitized rocks marked by biotite, quartz, and orthoclase.  Ore body is about 1.5 km by 400-500 m in size and coincides with the intrusion.  A pyrite aureole extends about 1 km from the intrusion area and coincides with a zone of propylitization of the Upper Jurassic volcanic and sedimentary country rocks.	Russia

Q57-10	Tumannaya	Q	57	10	64 16 28N	160 02 23E	64.2744444444444	160.039722222222	6416'N	16002'E	Au-Ag epithermal vein	Au, Ag		Small.  Up to 16.7 g/t Au and 50 g/t Ag.  	Kedon	Biryukov, written commun., 1988	Quartz veins and veinlets occur in an area several hundreds of meters long and up to 20 m wide in Middle Upper Devonian volcanic rocks of the Kedon series.  Veins contain disseminated pyrite, sphalerite, chalcopyrite, arsenopyrite, gold, electrum, and silver sulfosalts.	Russia

Q58-01	Svetlin	Q	58	01	67 48 35N	167 28 12E	67.8097222222222	167.47	6749'N	16728'E	Au quartz vein   	Au		Small.  Average 5.0 to 30 g/t Au.  	Chukotka	Shavkunov and Panychev, written commun., 1977	Deposit consists of lenticular and lenticular quartz veins tens to hundreds of meters long, and linear stockworks with disseminated arsenopyrite, pyrite, galena, sphalerite, and chalcopyrite; minor boulangerite, stibnite, and ubiquitous gold.  Veins occur in altered Lower to Middle Triassic carbonaceous shale, siltstone, and sandstone; in hornfels; and in Triassic gabbro-diabase sills.  About 200 en echelon veins are known along zones up to 10 km long.  Gold ore bodies are confined to a fracture zone between two Early Cretaceous granitic bodies which occur at the intersections of major east-west and northwest structures.	Russia

Q58-02	Elombal, Yakor	Q	58	02	67 45 27N	165 26 47E	67.7575	165.446388888889	6745'N	16527'E	Sb-Au vein? 	Au, As, Sb		Small.  	Eastern Asia-Arctic: Omsukchan	Aksenova, 1990	Numerous, generally north-south zones of fracturing, silicification, and ankeritization, contain veins and veinlets of calcedony-like quartz with gold, arsenopyrite, stibnite, native arsenic, realgar, orpiment, pyrite, and chalcopyrite.  Ore bodies are confined to hypabyssal intrusions of mid-Cretaceous (K-Ar age of 97 Ma) syenite to diorite porphyry that intrude a weakly deformed Upper Triassic sandstone-shale sequence.  Mineralization is controlled by a major northwest trending fault.	Russia

Q58-03	Asket	Q	58	03	67 13 34N	163 44 11E	67.2261111111111	163.736388888889	6714'N	16344'E	Porphyry Cu-Mo and Polymetallic vein   	Cu, Mo, Au		Small.  Average grade about 0.5% Cu, 0.05% Mo, and 0.2 g/t Au.  	Oloy	Gorodinsky and others, 1974; Gulevich, written commun., 1987	Deposit consists of a stockworks of quartz-sulfide and chlorite-sulfide veinlets with disseminated pyrite and chalcopyrite, and subordinate molybdenite, magnetite, native gold, marcasite, ilmenite, sphalerite, pyrrhotite, and arsenopyrite.  Ore body confined to zones of fissuring and brecciation at the contact of an Early Cretaceous diorite body that intrudes volcanic and sedimentary rocks.  Copper-porphyry mineralization is associated with propylitic alteration of the host rocks.  Numerous quartz and quartz-carbonate veins with gold-silver-polymetallic ore minerals are associated with the porphyry Cu-Mo body.	Russia

Q58-04	Kulpolney	Q	58	04	67 13 10N	166 16 26E	67.2194444444444	166.273888888889	6713'N	16616'E	Volcanic-hosted Hg	Hg	Cu, Zn, Pb, Au, Ag	Small.  	Eastern Asia-Arctic: Chukotka	Kopytin, 1978	Quartz, quartz-dickite, and quartz-carbonate veins, as well as breccias and altered rocks contain disseminated veinlets that include polymetallic tetrahedrite-tennantite ore bodies in spilite, gabbro-diabase, and tuffaceous and volcaniclastic rocks of Upper Jurassic age.  Ore bodies are confined to the southern end of a volcanic depression related to Early Cretaceous hypabyssal intrusions and necks of intermediate to mafic composition.  Ore bodies are controlled by east-west structures and a radial fracture zone.  Main ore and vein minerals are Hg-tetrahedrite, tetrahedrite, quartz, dickite, and nacrite, with subordinate amounts of galena, sphalerite, chalcopyrite, pyrite, chalcocite, calcedony, chlorite, illite, ankerite, and calcite.	Russia

Q58-05	Peschanka	Q	58	05	66 35 52N	164 29 55E	66.5977777777778	164.498611111111	6636'N	16430'E	Porphyry Cu-Mo   	Cu, Mo, Au		Large. Estimated resources 940 million tonnes with average grade 0.51% Cu, 0.019% Mo, 0.42 g/t Au, and 1.4 g/t Ag.  	Oloy	Gorodinsky and others, 1978; Volchkov and others, 1982; Kaminskiy and Baranov, written commun., 1982; Migachev and others, 1984; Gulevich, written commun., 1987; Shpikerman and Dylevskyi, wirtten commun., 1992.	Deposit is confined to the eastern portion of the Late Jurassic and Early Cretaceous Egdegkych multiphase pluton. Pluton composed of monzodiorite and quartz monzodiorite intruded by planar bodies of quartz monzonite and granodiorite porphyry.  Sulfide veinlets and disseminations, with Co and Mo minerals, are pervasive throughout the entire elongated monzonite-granodiorite porphyry body, and extend into wall rocks.  Main ore minerals are pyrite, chalcopyrite, bornite, tetrahedrite-tennantite, and molybdenite.  Magnetite, hematite, sphalerite, galena, chalcocite, native gold, gold tellurides, enargite, arsenopyrite, pyrrhotite, and marcasite occur in minor amounts or are rare.  Gangue minerals are quartz, carbonate, and anhydrite.  Four mineral associations are distinguished:  (1) molybdenite that is associated with the quartz-sericite subzone of phyllic alteration;  (2) pyrite and chalcopyrite, associated with quartz-sericite-chlorite alteration;  (3) chalcopyrite, bornite, and tetrahedrite coincident with quartz-sericite and biotite alteration; and  (4) polysulfide mineralization which occurs with all alteration types.  Mineralization was preceded by wide-spread pyritization in the peripheral propylitic zone.  Trace elements include Ag, Pb, Bi, Co, Ni, Zn, Pd, Pt, and Te.	Russia

Q58-06	Vesennee	Q	58	06	66 30 09N	164 23 39E	66.5025	164.394166666667	6630'N	16424'E	Au-Ag epithermal vein	Au, Ag		Medium.  Grade ranges from 0.1 to 48 g/t Au and up to 300 g/t Ag.  	Oloy	Gorodinsky and others, 1974; Shilo and others, 1975; Shapovalov, 1976; Sidorov, 1978;  Gulevich, written commun., 1987	Carbonate-quartz veins, altered veinlets, and mineralized breccias occur in structurally complex forms.  Veins are controlled by northeast and approximately east-west fractures which cut northwest-trending zones of copper-porphyry bodies.  Individual ore bodies extend for 150-500 m.  Main gangue minerals are quartz, calcite, and rhodochrosite with subordinate adularia, dolomite, celestite, and gypsum.  Ore minerals include sphalerite, galena, pyrite, chalcopyrite, tetrahedrite, tennantite, bournonite, and electrum, with minor silver sulfides and sulfosalts, stannite, and matildite.  Au:Ag ratio varies from 1:5 to 1:30.  Ores commonly contain trace Cu, Mo, As, Bi, Sb, Co, Ni, Mn, Cr, Cd, In, and Te.  Ore bodies occur mainly in propylitized trachyandesites of an Upper Jurassic volcaniclastic sequence that is intruded by hypabyssal bodies and dikes of gabbroid rocks, syenite, granodiorite porphyry, and andesite-dacite, of Late Jurassic to Late Cretaceous ages.	Russia

Q58-07	Uralskoe	Q	58	07	66 28 07N	166 48 28E	66.4686111111111	166.807777777778	6628'N	16648'E	Volcanic-hosted Hg	Hg, Sb, Au, Ag		Small.  	Eastern Asia-Arctic: Koni-Yablon	Babkin, 1975	Mercury deposits are present along two northeast-trending belts associated with hypabyssal bodies of Early to Late Cretaceous granite porphyry and quartz porphyry.  Deposits are hosted by sandstone and siltstone in a Lower Cretaceous volcaniclastic molasse.  Individual ore zones are typically 100 m long by 20-30 wide.  Ore minerals are cinnabar, metacinnabar, pyrite, arsenopyrite, chalcopyrite, hematite, silver sulfosalts, and native gold.  Gangue minerals include quartz, calcedony, kaolinite, hydromica, calcite, and chlorite.  Cinnabar is mainly confined to silicified and sericitized rocks as fine disseminations, powdery coatings, and thin veinlets.  High concentrations of lead, zinc, antimony, molybdenum, tin, tungsten, and bismuth are characteristic of the ores.  Cinnabar ore bodies are localized at the intersections of structures that trend approximately north-south and east-west.	Russia

Q58-08	Teleneut	Q	58	08	66 28 55N	164 48 45E	66.4819444444444	164.8125	6629'N	16449'E	Podiform Cr   	Cr, Ni		Small.  Up to 70% chromite.  	Aluchin	Aksenova, Dovgal, and Sterligova, 1970	Deposit occurs in serpentinite at the south end of the Aluchin alpine-type ultramafic body.  Irregularly-shaped chromite deposit extends about 1.5 km toward the north with a width of about 700 m.  Chromite ores are disseminated, banded, lenticular, and sometimes massive; with a chromite content up to 70%.  Disseminated pentlandite, millerite, bravoite, violarite, pyrrhotite, and chalcopyrite occur in both chromite rich and chromite poor zones, in serpentinite, and in listwnite.	Russia

Q58-09	Rzhavy	Q	58	09	65 46 42N	165 06 10E	65.7783333333333	165.102777777778	6547'N	16506'E	Porphyry Cu-Mo   	Cu, Mo, Au		Small.  	Central Koryak	Gulevich, written commun., 1987	Stockwork and disseminated veinlets of pyrite, chalcopyrite, molybdenite, magnetite, pyrrhotite, and native gold are hosted by Cretaceous diorite, granodiorite, and diorite and granodiorite porphyry.  Central portions of the stockworks are locally dominated by molybdenite.  Peripheral zones are marked by chalcopyrite; sometimes with intergrowths of galena, sphalerite, and tetrahedrite-tennantite, especially in andesite lavas.	Russia

Q58-10	Irgunei	Q	58	10	64 41 40N	166 50 06E	64.6944444444444	166.835	6442'N	16650'E	Au-Ag epithermal vein	Au, Ag	Cu, Pb, Zn	Medium.  Ore contains 0.2 to 68 g/t Au and 11.2 to 146 g/t Ag.  	Eastern Asia-Arctic: Koni-Yablon	V.P. Vasilenko, written commun., 1973	Deposits consist of adularia-quartz and adularia-carbonate-quartz veins containing electrum, silver sulfosalts and selenides, galena, sphalerite, chalcopyrite, and, more rarely, molybdenite, arsenopyrite, cinnabar, and realgar.  Veins occur  over a complex intrusive dome at the intersection of a northeast trending fault, the Anadyr suture, and a northwest trending fault.  A large hypabyssal andesite body occurs in the center of the dome and is surrounded by smaller stocks and dikes of diorite, granodiorite porphyry, andesite-dacite, and rhyolite.  Periphery of the zone is composed of sheets of Lower and Upper Cretaceous felsic and basic volcanic rocks.  Veins are commonly hosted in highly altered quartz-adularia-hydromica rocks near the hypabyssal body, and are associated with radial fissuring and fault zones.	Russia

Q58-11	Lastochka	Q	58	11	64 32 09N	165 06 34E	64.5358333333333	165.109444444444	6432'N	16507'E	Mo greisen and vein  	Mo	Bi, Ag	Small.  Average grade of 0.03-0.1% Mo.	Eastern Asia-Arctic: Koni-Yablon	V.A. Faradliev, written commun., 1971; V.I. Golyakov, written commun., 1973.	Consists of steeply-dipping, linear zones containing a disseminated molybdenum stockwork composed of quartz-molybdenum veins and veinlets associated with adjacent greisen. Stockwork contains from a few thousandths of a percent to 10% and more molybdenum. K-feldspar, silicate, and pyrite alteration are common. Greisen contains coarse flakes of muscovite (30-50%), quartz (50-60%), sericite, and pyrite.  Molybdenite contains less than 30 g/t Re.  Major ore minerals are molybdenite, galena, sphalerite, chalcopyrite, bismuthinite, and cassiterite.  Less frequent are scheelite, tourmaline, and fluorite.  Ore zones, containing up to few % Mo, have sharp boundaries. Away from Mo ore zones, base metal, Ag, and Bi increase as Mo decreases.  Molybdenite-bearing quartz veins commonly occur within quartz-muscovite greisen. Deposit occurs along contacts of a Late Cretaceous leucocratic granite stock that also contains small bodies of pegmatite and aplite, and zones of greisen.  	Russia

Q59-01	Omrelkai	Q	59	01	67 59 38N	170 36 05E	67.9938888888889	170.601388888889	6760'N	17036'E	Volcanic-hosted Hg  	Hg, Sb		Small.  	Eastern Asia-Arctic: Chukotka	Babkin, 1975; Kopytin, 1978	Ore district is composed of seven areas spaced about 1 km apart, which occur in a graben-like, east-west trending structure in late Mesozoic volcanic rocks.  Ore bodies occur in steeply-dipping mineralized fracture zones in tuff of intermediate and moderately felsic composition.  Deposits are spatially related to hypabyssal bodies of diorite porphyry, andesite, and basalt that form the feeders for extrusive sheets.  Rocks were intensely propylitized and locally silicified, followed by pervasive superimposed pyritization.  Cinnabar occurs in separate veinlets and masses but more commonly, as irregularly disseminations in the host rock, and in quartz and calcite veinlets.  Cinnabar is commonly associated with pyrite, and, more rarely, stibnite.	Russia

Q59-02	Enmyvaam	Q	59	02	67 01 39N	171 57 33E	67.0275	171.959166666667	6702'N	17158'E	Au-Ag epithermal vein	Au, Ag		Small.  	Eastern Asia-Arctic: Anuyi-Beringovsky	Chubarov, written commun., 1978	Zones of gold-silver veins occur in Upper Cretaceous dacite of the Snezhnin caldera.  Zones are typically 1-2 km long and 100-200 m wide.	Russia

Q59-03	Maly Peledon	Q	59	03	66 13 43N	167 56 10E	66.2286111111111	167.936111111111	6614'N	16756'E	Au-Ag epithermal vein	Au, Ag		Small.  Contains 0.5-13 g/t Au, and from 5 to 1850 g/t Ag.  	Eastern Asia-Arctic: Anuyi-Beringovsky	Zotov, written commun., 1970; Zotov and others, written commun., 1973	Quartz and fluorite-quartz veins with brecciated and cockade structures occur in zones of silicified and argillized, Albian and Cenomanian andesite and rhyolite.  Individual veins are tens and hundreds of meters long.  Ore occurrences are confined to the southern portion of a paleocaldera.  Disseminated pyrite, hematite, and streaks of manganese oxides ccur in the area.  Anomalous values of As, Cu, lead, and Zn occur.	Russia

Q59-04	Gornostai	Q	59	04	66 14 31N	169 33 31E	66.2419444444444	169.558611111111	6615'N	16934'E	Au-Ag epithermal vein	Au, Ag		Small.  Ranges from 0.5 to 11.1 g/t Au, 100-1028 g/t Ag.  	Eastern Asia-Arctic: Anuyi-Beringovsky	Timofeev and others, written commun., 1967; Zotov and others, written commun., 1973	A fracture zone approximately 7 km long and 1.5-2 km wide crosses the core of a northwest-trending volcanic structure composed of lower Cretaceous andesite flows cut by necks and dikes of rhyolite and diorite porphyry.  Silicified and propylitized volcanic rocks host more 100 veins and sets of stockworks.  Vein types are quartz, sulfide-quartz, sparse adularia-quartz, and epidote-chlorite-quartz.  Veins average about 150-200 m long and 0.1-1.2 m thick.  Veins are typically marked by brecciated, drusy, or cockade structures, or massive.  Disseminated sulfides and sulfide veinlets make up 5 to 90% of the veins.  Ore minerals are chalcopyrite, pyrite, galena, sphalerite, magnetite, and aikinite.	Russia

Q59-05	Chineyveem	Q	59	05	66 11 16N	171 26 10E	66.1877777777778	171.436111111111	6611'N	17126'E	Au-Ag epithermal vein	Au, Ag		Small.  	Eastern Asia-Arctic: Anuyi-Beringovsky	Kotlyar, 1986	Quartz veins with disseminated galena, chalcopyrite, pyrite, tetrahedrite-tennantite, and silver sulfosalts are confined to linear zones of sulfidized and tourmalinized, hydromica-quartz altered rocks; trending nearly east-west and northeast.  Gold-silver veins occur in the middle of a collapsed volcanic structure subjected to resurgent doming.  Veins and highly altered rocks occur along a major fault, where it intersects the contact of a diorite-granodiorite body that intrudes Albian to Cenomanian rhyolite-dacite volcanic rocks.  Veins and alteration occur in both the intrusive body and country rocks.  	Russia

Q59-06	Berezovogor	Q	59	06	65 49 35N	170 07 41E	65.8263888888889	170.128055555556	6550'N	17008'E	Au-Ag epithermal vein	Au, Ag, Pb	Cu, Zn	Small. 	Eastern Asia-Arctic: Koni-Yablon	Zakharov, written commun., 1977	Quartz veins, and mineralized fractured and brecciation belts 200-1000 m long, occur in propylitized andesites of Upper Cretaceous age.  Ore bodies trend predominantly northwest.  Typical gangue minerals are:  quartz, sericite, carbonate, chlorite, and adularia.  Ore minerals are:  galena, chalcopyrite, sphalerite, pyrite, tetrahedrite-tennantite, gold, silver sulfosalts, molybdenite, marcasite, and hematite.  Au:Ag ratio is about 1:30.	Russia

Q59-07	Ust-Belaya	Q	59	07	65 27 00N	173 04 24E	65.45	173.073333333333	6527'N	17304'E	Podiform Cr	Cr, PGE		Medium.   Up 10-30% Cr.  	Ust-Belaya 	Silkin, 1983	Zones of closely spaced, banded chromite (10-30% chromite) occur as lenses, schlieren, and vein-like bodies of disseminated and massive chromite.  Chromite occurs in layers up to 1300 m long and 400 m wide in dunite of the Ust-Belaya alpine-type ultramafic body.  The chromite occurrences extend northward for 13 km along a belt more than 2 km wide. 	Russia

Q59-08	Serovskoe	Q	59	08	65 17 04N	169 00 00E	65.2844444444444	169	6517'N	16900'E	Au-Ag epithermal vein	Au, Ag		Small.  	Eastern Asia-Arctic: Koni-Yablon	Vasilenko, 1974; Zakharov, written commun., 1977	Carbonate-quartz, and barite-carbonate-quartz veins containing galena, sphalerite, pyrite, chalcopyrite, pyrargyrite, and electrum occur in Late Cretaceous syenite-diorite, quartz diorite, granodiorite, and granite; which are intruded by hypabyssal intrusions of intermediate and basic composition.  Au:Ag ratio is about 1:100.  Veins occur where the Anadyr fault is cut by northward-trending fractures.	Russia

Q59-09	Travka	Q	59	09	64 47 41N	168 36 06E	64.7947222222222	168.601666666667	6448'N	16836'E	Porphyry Mo   	Mo		Small.  	Eastern Asia-Arctic: Koni-Yablon	Nevretdinov, written commun., 1966	Disseminated molybdenite and pyrite occur in altered, silicified, Lower Cretaceous extrusive volcanic rocks that are related to a granodiorite-granite plutonic complex.	Russia

Q59-10	Parkhonai	Q	59	10	64 03 48N	173 17 43E	64.0633333333333	173.295277777778	6404'N	17318'E	Sn polymetallic vein and Sn silicate-sulfide vein	Sn		Small.  	Central Koryak	Rozenblyum, Zincevich, and Nevretdinov, 1975; Lugov, 1986	Numerous sericite-quartz and tourmaline-chlorite-sulfide veins, veinlets, and mineralized zones contain cassiterite, arsenopyrite, pyrrhotite, pyrite, chalcopyrite, sphalerite, galena, tetrahedrite, various silver minerals, stibnite, and considerable mercury in a Late Cretaceous flysch sequence composed of interbedded sandstone, siltstone, and argillite.  Individual ore bodies extend for several hundreds of meters.  Clastic rocks are intruded by small bodies and dikes of late Paleogene granite porphyry.  Ore bodies are located over the periphery and middle of a volcanic dome that is controlled by a deep, concealed, northwest-trending fault.	Russia

Q59-11	Lamut	Q	59	11	64 05 04N	172 59 52E	64.0844444444444	172.997777777778	6405'N	17260'E	Volcanic-hosted Hg 	Hg	As, Sb	Small.  	Central Koryak	Babkin, Drabkin, and Kim, 1967; Rozenblyum, Zincevich, and Nevretdinov, 1975	Lenticular occurrences and masses of quartz, opal, chalcedony, dolomite, dickite, and cinnabar occur in intensely silicified, kaolinized, carbonatized, and chloritized late Paleogene rhyolite, and, less commonly, in basalt and tuffite; along northeast-trending fracture zones.  Subordinate ore minerals are metacinnabar, realgar, stibnite, and pyrite.	Russia

Q60-01	Telekai	Q	60	01	67 59 27N	178 05 17E	67.9908333333333	178.088055555556	6759'N	17805'E	Sn silicate-sulfide vein and Sn greisen  	Sn		Medium.  	Eastern Asia-Arctic: Chaun	Voevodin, 1969	Quartz-cassiterite, quartz-cassiterite-tourmaline, and cassiterite-chlorite veins, and tin-bearing aplites and greisens, occur in the marginal zone of the Late Cretaceous Telekai granitic pluton.  Ore zone extends north-west along the Chukchi fold structure.  Quartz, tourmaline, muscovite, sericite, chlorite, albite, potassium feldspar, and fluorite are the main gangue minerals.  Cassiterite is the main ore mineral; occurring as masses and in cross-cutting veinlets.  Molybdenite, scheelite, lellingite, arsenopyrite, bismuthinite, and magnetite are present locally in some veins and zones of the ore bodies.  Chalcopyrite, pyrrhotite, stannite, galena, sphalerite, wolframite, garnet, beryl, rutile, sphene, xenotime, and monazite are present in minor amounts.  Mineralization began with albitization and ended with the development of low-sulfide quartz veins.	Russia

Q60-02	Vodorazdelnoye	Q	60	02	67 54 39N	178 51 13E	67.9108333333333	178.853611111111	6755'N	17851'E	Sn silicate-sulfide vein   	Sn	Cu, Ni, Ag, PGE	Small.  High grade ore.  	Eastern Asia-Arctic: Chaun	Tsvetkov, and Pospelova, 1986; Tsvetkov, 1990	Two types of ores are distinguished:  (1) cassiterite-quartz-tourmaline veins in and adjacent to the Early Cretaceous  Telekaigranite pluton;  (2)  disseminated veinlets of tin-nickel-copper mineralization with gold and accessory platinum,  palladium and rhodium hosted in sericitized, silicified and tourmalinized injection migmatites which form a subhorizontal sheet-like body between the granite and overlying sedimentary rocks.  The first ore body type also includes:  chlorite, dolomite, and calcite, with minor pyrite, arsenopyrite, pyrrhotite, sphalerite, galena, stannite, scheelite, molybdenite, bismuthinite, and other minerals.  The second type of ore bodies consist  mainly of chalcopyrite and less abundant pyrrhotite and cassiterite; associated with the nickel minerals niccolite, gersdorfite, corynite, and hauchecornite.  Deposit is probably related to two separate magmatic sources at different depths.

	Russia

Q60-03	Mymlerennet	Q	60	03	67 47 18N	179 46 14E	67.7883333333333	179.770555555556	6747'N	17946'E	Sn silicate-sulfide vein   	Sn	W, Bi	Small.  	Eastern Asia-Arctic: Chaun	Borodkin, and Pristavko, 1989	Deposit consists of elongate stockworks of closely spaced, subparallel quartz veinlets with chlorite and sericite.  Ore minerals are arsenopyrite, pyrrhotite, cassiterite, and pyrite; with lesser sphalerite, chalcopyrite, cobaltite, and tetrahedrite-tennantite.  Tungsten minerals occur locally. Ore minerals are wolframite, scheelite, bismuthinite, native bismuth, topaz, fluorite, muscovite, and albite.  Host rocks are variably contact-metamorphosed, Lower and Upper Triassic clastic rocks which are intruded by the dikes of lamprophyre, granodiorite porphyry, and diorite porphyry.  Deposit occurs in a zone made up of thrusts and steeply dipping faults that trend northeast and northwest.  The stockworks are oriented northeast.	Russia

Q60-04	Gora Krassnaya	Q	60	04	66 34 38N	175 30 31E	66.5772222222222	175.508611111111	6635'N	17531'E	Porphyry Cu-Mo  	Mo, Cu, Au		Small.  	Eastern Asia-Arctic: Koni-Yablon	Zakharov and V.P. Vasilenko, written commun., 1977	Consists of zones of disseminated sulfide veinlets and auriferous quartz-carbonate and quartz-epidote-chlorite veins that contain pyrite, pyrrhotite, chalcopyrite, and molybdenite in Upper Cretaceous extrusive volcanic and granitic rocks.	Russia

Q60-05	Valunistoe	Q	60	05	66 28 29N	177 38 11E	66.4747222222222	177.636388888889	6628'N	17738'E	Au-Ag epithermal vein	Au, Ag	Pb, Zn, Cu	Medium.  Ranges 1.4 to 787 g/t Au and 2 to 6273 g/t Ag.  	Eastern Asia-Arctic: Anuyi-Beringovsky	Berman and Trenina, 1968; Berman, 1969; Sidorov, 1978; P.Layer, V.Ivanov, and T.Bundtzen, 1994, written commun.	More than one hundred adularia-quartz, adularia-carbonate-quartz, and fluorite-quartz veins are located in zones up to 1.5 km long and 400 m wide.  Ore minerals consist mainly of finely disseminated electrum, argentite, aguilarite, stromeyerite, native silver, galena, sphalerite, and chalcopyrite.  A gold-argentite association is predominant in veins of the upper portions of the deposit.  At depth, gold-argentite is succeeded by a gold-chalcopyrite and gold-galena-sphalerite associations.  Ore bodies are confined to Upper Cretaceous volcanic rocks within a volcanic dome structure that occurs at the intersection of northwest and northeast trending faults.  Wall rocks are dominated by andesite-dacite and dacite with quartz-adularia-hydromica and propylitic alteration.  Quartz veins are lenticular to podiform, commonly occur en echelon, and locally pass into a stockwork of veinlets associated with hydrothermal and subvolcanic breccia.  Ar-Ar isotopic studies of  adularia in Au-Ag vein yields an age of 72 Ma.  	Russia

Q60-06	Shakh, Zhilny	Q	60	06	66 21 52N	177 10 44E	66.3644444444444	177.178888888889	6622'N	17711'E	Au-Ag epithermal vein	Au, Ag		Small.  	Eastern Asia-Arctic: Anuyi-Beringovsky	Zakharov, written commun., 1977	Silicified and sulfidized, auriferous zones, and quartz-polymetallic and low-sulfide adularia-quartz veins several hundreds of meters long.  Deposit occurs in Upper Cretaceous propylitized, felsic volcanic rocks and underlying Paleozoic talc-chlorite-sericite, quartz-chlorite-sericite, and epidote-chlorite schists, and marble.  Ore minerals are pyrite, chalcopyrite, galena, sphalerite, electrum, and argentite.  Mineralized zones are controlled by a large, north-south trending fault.	Russia

Q60-07	Skalistaya	Q	60	07	65 24 31N	174 07 47E	65.4086111111111	174.129722222222	6525'N	17408'E	Basaltic Cu 	Cu	Ag	Small.  Cu about 1-2%.  	Pekulney	Shkursky and Matveenko, 1973	A network of prehnite-pumpellyite-carbonate veinlets 2-20 cm thick contains disseminated copper.  Veinlets consist largely (80-90%) of prehnite and low-iron pumpellyite; secondary minerals include laumontite, calcite, dolomite, chlorite, quartz, epidote, and adularia.  Native copper intergrowths 0.5-8 mm in diameter are present in prehnite and pumpellyite masses and in wall rocks.  Copper content of the ore is about 1-2%.  Native copper contains up to 100 g/t Ag.  Ore bodies occur in amygdaloidal basalt and associated tuff in a Upper Jurassic to Lower Cretaceous  volcaniclastic sequence that extends over an area of about 1.0 by 0.6 km.  Similar occurrences of native copper occur along a belt up to 18 km long.	Russia

R01-01	Tenkergin	R	01	01	68 10 44N	178 54 53W	68.1788888888889	-178.914722222222	6811'N	17855'W	Sn quartz vein  	W, Sn		Small.  	Chukotka	Lugov, 1986	Consists of steeply dipping, branching quartz veins that contain wolframite, scheelite, and subordinate cassiterite that cut contact-metamorphosed Lower to Middle Triassic sandstone and shale.  Quartz veins also contain sericite, clay minerals, tourmaline, and beryl.  Minor ore minerals include chalcopyrite, arsenopyrite, and sphalerite.	Russia

R01-02	Svetloe	R	01	02	68 03 58N	178 19 03W	68.0661111111111	-178.3175	6804'N	17819'W	Sn quartz vein  	Sn, W		Medium.  Has been mined from 1979 to present.	Chukotka	Lugov, 1986; Kuleshov, Pristavko, and Plyashkevich, 1988.	Deposit consists of en-echelon sets of quartz veins and veinlets grouped in two zones that diverge to the southeast.  Each ore zone hosts several tens of veins, which are 0.2-1.5 m thick and several hundreds of meters long; and about one hundred smaller veins.  Ores dominated by Sn with abundant sulfides that occur over a buried stock of greisenized granite.  Veins are hosted in metamorphosed Triassic sandstone and shale cut by granite porphyry and aplite dikes of the Cretaceous Iultin complex.  Successive mineral associations are:  (1) topaz-fluorite-muscovite stage (greisen);  (2) cassiterite-wolframite-quartz stage with topaz, lellingite, and fluorite (this stage is the most productive);  (3) arsenopyrite-quartz stage with cassiterite and native bismuth,  (4) stannite-chalcopyrite stage with small amounts of bismuthinite, sphalerite, galena, pyrrhotite, and bornite;  (5) scheelite-fluorite-albite stage with chlorite, pyrite, marcasite, and cassiterite; and  (6) fluorite-calcite stage with kaolinite.  Complex cassiterite-wolframite mineralization predominates in the upper portion of the deposit; and tungsten ores are dominant at depth.	Russia

R03-01	Lik	R	03	01	68 12 00N	163 07 00W	68.2	-163.116666666667	6812'N	16307'W	Sedimentary exhalative Zn-Pb-barite	Zn, Pb, Ag, Barite		25 million tonnes of 8.8% Zn, 3.0% Pb, and 38 g/t Ag	Northwestern Brooks Range	Forrest, 1983; Forrest and others, 1984; Forrest and Sawkins, 1987	Disseminated and massive sphalerite, galena, pyrite, marcasite, and sparse barite in Mississippian and Pennsylvanian shale, chert, and quartz-exhalite of Kuna Formation.  Main deposit in zone about 2,000 m long that extends up to 500 m downdip.  Ore zones open along strike to north and south.  Sulfide horizon varies from tabular to complexly folded.  Long and sinuous zone of complex and brecciated textures, possibly a line of vents, occurs within center of deposit, parallel to strike.  Host rocks and deposit extensively structurally imbricated with many subhorizontal thrust faults.	Alaska

R03-02	Red Dog	R	03	02	68 04 00N	162 50 00W	68.0666666666667	-162.833333333333	6804'N	16250'W	Sedimentary exhalative Zn-Pb-barite	Zn, Pb, Ag, Ba		Main deposit: Reserves of 52.2 million tonnes grading 19.5% Zn, 5.3% Pb,  100 g/t Ag. Aqqaluk deposit: Reserves of 76 million tonnes grading 13.7% Zn, 3.6% Pb, 66 g/t Ag. Hilltop deposit: 14.1 million tonnes grading 10.0% Zn, 2.7% Pb, 41 g/t Ag.	Northwestern Brooks Range	Tailleur, 1970; Plahuta, 1978; Booth, 1983; Joseph T. Plahuta, L.E. Young, J.S. Modene, and David W. Moore, written commun., 1984; Lange and others, 1985; Moore and others, 1986; Schmidt and Zierenberg, 1988; Bundtzen and others, 1996.	Disseminated and massive sphalerite, galena, pyrite, and barite in Mississippian and Pennsylvanian shale, chert, and silica exhalite of the Kuna Formation.  Deposit is 1,600 m long and up to 150 m thick.  Occurs near base of formation which is locally subdivided into upper ore-bearing Ikalukrok unit and lower calcareous Kivalina unit of this locality.  Latter forms stratigraphic footwall for deposits.  Barite-rich lenses up to 50 m thick locally cap deposit.  Sulfide minerals occur as disseminated sulfides in organic-rich siliceous shale, coarse-grained sulfide veins, fine-grained fragmental-textured to indistinctly bedded sulfides, and silica exhalite lenses.  Minor hydrothermal alteration marked by silicification and decarbonatization of shale.  Small propylitically altered dioritic plug or hydrothermally altered pyroxene andesite flow occurs at north end of deposit.  Host rocks and deposit are extensively structurally imbricated along many subhorizontal thrust faults.  Graywacke of the Cretaceous Okpikruak Formation structurally underlies deposit.	Alaska

R04-01	Avan	R	04	01	68 20 00N	161 52 00W	68.3333333333333	-161.866666666667	6820'N	16152'W	Podiform Cr	Cr, PGE		Grab samples with up to 43% Cr and 0.48 g/t PGE.  Estimated 290,000 to 600,000 tonnes chromite	Kobuk	Roeder and Mull, 1978; Degenhart and others, 1978; Zimmerman and Soustek, 1979; Mayfield and others, 1983; Foley and others, 1985; Foley, 1988  	Disseminated fine- to medium-grained chromite in Jurassic or older dunite and harzburgite tectonite, locally serpentinized.  Part of dismembered ophiolite.  Zones of chromite up to a few meters wide and a few hundred meters long in dunite.  Intense minor folding of dunite and harzburgite layers.  Host rocks part of the Misheguk igneous sequence.  Mafic and ultramafic rocks floored by major thrust fault.	Alaska

R04-02	Misheguk Mountain	R	04	02	68 15 00N	161 05 00W	68.25	-161.083333333333	6815'N	16105'W	Podiform Cr	Cr, PGE		Grab samples with up to 27.5% Cr and 0.31 g/t PGE.  Estimated  110,000 to 320,000 tonnes chromite	Kobuk	Roeder and Mull, 1978; Degenhart and others, 1978; Zimmerman and Soustek, 1979; Foley and others, 1985; Foley, 1988  	Disseminated fine- to medium-grained chromite in Jurassic or older dunite and peridotite tectonite, locally serpentinized.  Part of dismembered ophiolite.  Zones with chromite up to 31 by 107 m.  Intense minor folding of dunite and harzburgite layers.	Alaska

R04-03	Nimiuktuk	R	04	03	68 24 00N	159 54 00W	68.4	-159.9	6824'N	15954'W	Bedded barite	Barite		About 1.5 million tonnes barite	Northwestern Brooks Range	Mayfield and others, 1979; Barnes and others, 1982	Massive, nearly pure barite in small isolated hill about 7 to 10 m high, 40 m wide, and 60 m long.  Stratigraphic contacts not exposed; nearest units are dark shale and chert of the Mississippian and Pennsylvanian Kuna Formation and shale and graywacke of the Lower Cretaceous Okpikruak Formation.  Altered Mississippian(?) andesite crops out about 180 m from barite.  Size of deposit determined with gravity survey model.	Alaska

R04-04	Drenchwater	R	04	04	68 34 00N	158 41 00W	68.5666666666667	-158.683333333333	6834'N	15841'W	Sedimentary Zn-Pb and (or) kuroko massive sulfide	Zn, Pb, Ag		Grab samples with more than 1% Zn, 2% Pb, and 150 g/t Ag	Northwestern Brooks Range	Tailleur and others, 1977; Nokleberg and Winkler, 1982; Lange and others, 1985	Disseminated and massive sphalerite, galena, pyrite, and barite in Mississippian shale, chert, tuff, and quartz-exhalite of the Kagvik sequence.  Volcanic sandstone and keratophyre locally abundant.  Sulfides occur as disseminations in chert, disseminations and massive aggregates in quartz-exhalite, and as sparse, remobilized disseminations in sulfide-quartz veins crosscutting cleavage in shale and chert.  Locally extensive hydrothermal alteration of chert and shale with extensive replacement by kaolinite, montmorillonite, sericite, prehnite, fluorite, actinolite, chlorite, calcite, and quartz.  Deposit up to 1,800 m long and up to 50 m thick.  Host rocks and deposit extensively faulted and structurally imbricated with many thrust faults dipping moderately south.	Alaska

R04-05	Siniktanneyak Mountain	R	04	05	68 20 00N	158 30 00W	68.3333333333333	-158.5	6820'N	15830'W	Podiform Cr	Cr, Ni, PGE		Grab samples with up to 21% Cr, 0.2% Ni, 0.07 g/t Pt, and 0.1 g/t Pd.	Kobuk	Jansons and Baggs, 1980; Nelson and Nelson, 1982; Mayfield and others, 1983	Disseminated fine-grained chromite in discontinuous layers, pods, and wispy layers in Jurassic or older dunite and peridotite tectonite, locally serpentinized.  Intense minor folding of dunite and peridotite layers.  Host rocks part of the Misheguk igneous sequence.  Mafic and ultramafic rocks floored by major thrust fault.	Alaska

R04-06	Story Creek	R	04	06	68 22 00N	157 56 00W	68.3666666666667	-157.933333333333	6822'N	15756'W	Pb-Zn-Au-Ag vein	Pb, Zn, Ag, Au		Grab samples with up to 1.5 to 34% Pb, 1.5 to 50% Zn, 35 to 940 g/t Ag, and 1.2 g/t Au.	Northwestern Brooks Range	Ellersieck and others, 1982; Mayfield and others, 1983; Jeanine M. Schmidt and Inyo F. Ellersieck, written commun., 1985	Crustified sphalerite and galena in cross-cutting quartz veins in tightly folded and faulted sandstone, siltstone, and shale of the Mississippian Kayak Shale; part of Brooks Range allochthon.  Maximum width of float zone about 30 to 40 m.  Discontinuous mineralized float and outcrops along a linear trend about 3,000 m long across tightly folded strata, indicating origin by replacement in Late Jurassic or younger time.	Alaska

R04-07	Whoopee Creek	R	04	07	68 14 00N	157 51 00W	68.2333333333333	-157.85	6814'N	15751'W	Zn-Ag-Au vein	Zn, Ag, Au		Grab samples with up to 44% Zn, 458 g/t Ag, and 4.4 g/t Au	Northwestern Brooks Range	Ellersieck and others, 1982; Inyo F. Ellersieck, written commun., 1985	Fracture zones contain siltstone breccia with matrix of galena, sphalerite, quartz and minor carbonate occurs in tightly folded and faulted sandstone, siltstone, and shale of the Mississippian Kayak Shale.  Fracture zone about 6 m long.  Discontinuous float or outcrops along a linear trend with minimum length of 1,500 m across tightly folded strata, indicates replacement origin in Late Jurassic or younger time.	Alaska

R06-01	Esotuk Glacier	R	06	01	69 18 00N	145 15 00W	69.3	-145.25	6918'N	14515'W	Pb-Zn skarn and fluorite vein	Pb, Zn, Sn, Cu, W		Grab samples with up to 0.03% Sn, 0.15% W	Brooks Range	Grybeck, 1977; W.P. Brosge, oral commun., 1984; Rainer Newberry, written commun., 1985	Scattered, minor galena, sphalerite, malachite, cassiterite, and axinite in skarn in Devonian or older marble and calc-schist near periphery of Devonian gneissose granite.  Few quartz-tourmaline veins.	Alaska

R06-02	Porcupine Lake	R	06	02	68 48 00N	146 27 00W	68.8	-146.45	6848'N	14627'W	Polymetallic vein(?)	Cu, Zn, Ag, F		Grab samples with up to 4.8% Cu, 0.6% Zn, and 0.2% Ag	Brooks Range	Barker, 1978, 1981	Veins and replacement bodies with tetrahedrite, enargite, and fluorite in a silica gangue.  Occur in tuffaceous silicified limestone and minor chert breccia of the Mississippian and Pennsylvanian Lisburne Group, about 80 m below contact with the overlying Sadlerochit Group.  Distribution of veins and replacement bodies in breccias is highly variable.  Areas of densest veins and most mineralization occur intermittently along strike for nearly 1.6 km, and are up to about 2.4 m thick.  Veins crosscut bedding at low angles.  About 3 to 5 km to north, strata-bound, disseminated fluorite occurs in veins and replacement bodies for several kilometers along strike.  Veins are up to 0.9 m thick and grade from 1 percent up to nearly solid fluorite.  The fluorite bodies occur within a few meters of top of the Lisburne Group, near contact with the overlying Sadlerochit Group.	Alaska

R07-01	Romanzof Mountains	R	07	01	69 18 00N	143 50 00W	69.3	-143.833333333333	6918'N	14350'W	Polymetallic vein, Pb-Zn and possibly Sn skarn	Pb, Cu, Zn, Mo, Sn, Ag, F	U	Grab samples with up to 0.15% Sn	Brooks Range	Brosge and Reiser, 1968; Grybeck, 1977; Sable, 1977; W.P. Brosge, oral commun., 1984; Newberry and others, 1986	Numerous scattered mineral occurrences of polymetallic sulfides in Devonian(?) granite, Pb-Zn skarns, and quartz veins.  Some fluorite greisen.  Skarn and quartz veins occur in Precambrian marble and calc-schist of the Neruokpuk Quartzite at the periphery of the Silurian or Early Devonian Okpilak (granite) batholith.  The common types of deposits are:  (1) zones of disseminated galena, sphalerite, chalcopyrite and pyrite, locally with Au and Ag, in granite; (2) skarn in marble with disseminated magnetite, pyrite, pyrrhotite, sphalerite, and galena in gangue of carbonate, clinopyroxene, epidote, amphibole, beryl, tourmaline, and fluorite; (3) disseminated galena, sphalerite, chalcopyrite, and (or) molybdenite in quartz veins along sheared contact in granite; and (4) fluorite greisen in granite.	Alaska

R07-02	Bear Mountain	R	07	02	68 23 00N	142 11 00W	68.3833333333333	-142.183333333333	6823'N	14211'W	Porphyry Mo	Mo, W		Grab samples with up to 0.8% Mo and 0.6% W	Brooks Range	Barker and Swainbank, 1986	Molybdenite-wolframite-bearing, Tertiary rhyolite porphyry stock with cylindrical core of intrusive breccia intrudes Devonian and Mississippian sedimentary rocks, and Devonian or older metasedimentary rocks of the Neruokpuk(?) Quartzite.  Stock located near perimeter of the early Tertiary granite pluton of Bear Mountain. K-Ar isotopic age possibly reset from Devonian.  Local rhyolite porphyry dikes and quartz porphyry and some gossan with molybdenite and galena.  Zonal alteration pattern with core of sericitic and argillic alteration and outer zone of silicification.  Local halo of pyrite and propylitic alteration along margin of porphyry.  Exposed area approximately 1 km in diameter.  	Alaska

R07-03	Galena Creek	R	07	03	68 23 00N	142 02 00W	68.3833333333333	-142.033333333333	6823'N	14202'W	Polymetallic vein	Cu, Zn, Pb, Ag		Grab samples with up to 21% Cu, 3.5% Zn, 1.3% Pb, 170 g/t Ag	Brooks Range	Brosge and Reiser, 1968; R.C. Swainbank, in Barker, 1981	Disseminated galena, sphalerite, malachite, and barite in quartz veinlets and replacement bodies in phyllite, siltstone, and greenstone of Neruokpuk(?) Quartzite of Devonian or older age.  Area of veinlets and mineralization is about 760 by 1,060 m on ridge west of creek.  Vein system on east side of creek up to about 2 m wide and 454 m long.  Local alteration of phyllite to chlorite, epidote, and calcite.  Local malachite staining in greenstone and many early Tertiary rhyolite dikes locally.  Granite pluton and rhyolite breccia to east contain scattered hematite alteration and rare kaolinitization.	Alaska

R08-01	Fish River (Big Fish, Boundary, Rapid)	R	08	01	68 29 00N	136 29 00W	68.4833333333333	-136.483333333333	6829'N	13629'W	Stratabound Fe-P	Fe, P, Mn, Gems		Large.  Resource of greater than 1 billion tonnes grading 40% Fe.	Fish River	Yukon Minfile, 1988.	Consists of siderite and phosphatic ironstone that occur in shale within a clastic wedge of upper Lower Cretaceous (Albian) age.  Deposits occurs as phosphate-siderite pellets and granules within a matrix of detrital quartz and mudstone.  Rare phosphate minerals occur in epigenetic fracture veins and to a lesser degree in vugs, bedding plane partings and fault breccia.  Deposit is well known as the type locality of lazulite, the official Yukon gemstone.  Deposit age interpreted as Early Cretaceous. 	Canada

R52-01	Manganiler	R	52	01	71 39 53N	127 17 54E	71.6647222222222	127.298333333333	7140'N	12718'E	Southeast Missouri Pb-Zn 	Pb, Zn

Mississippi Pb, Zn		No data.	Dzhardzhan River 	Natapov, 1981; Davydov and others, 1988.	Consists of a layer of concordant, lenticular galena-sphalerite that occurs in Lower Cambrian dolomite. Sulfide layer ranges from 0.4 to 3.6 m thick and up to 135 m long.  Disseminated sulfides replace massive, predominantly sphalerite in the lower part of the layer.  Sulfides locally banded.  Main ore minerals are sphalerite and lesser galena.  Subordinate ore minerals are pyrite, marcasite, and smithsonite.	Russia

R52-02	Kyongdei	R	52	02	71 26 36N	127 19 56E	71.4433333333333	127.332222222222	7127'N	12720'E	Sediment-hosted U	U		Channel samples contain 0.01 to 11% U.	Dzhardzhan River 	Arsky and others, written commun., 1963.	Consists of an uraninite crust in Upper Proterozoic (Vendian) and Lower Cambrian sandstone and limestone.  U concentration increases in sulfides disseminations (pyrite and sphalerite), and in bitumen (kerite) inclusions.  Deposit occurs along specific stratigraphic intervales in anticlinal domes as lens-shaped ore bodies which range from 0.3 to 2.3 m thick and from 100 to 400 m long.  Length of the uranium-bearing zone is 50 km.	Russia

R52-03	Nikolaevskoe, Otkrytoe	R	52	03	70 20 00N	129 33 13E	70.3333333333333	129.553611111111	7020'N	12933'E	Au quartz vein	Au		No data.	Verkhoyansk 	Abel and Slezko, 1988.	Consists of conformable and cross-cutting quartz veins with gold, galena, arsenopyrite, pyrite, fahlore, sulfosalts, carbonates, and albite. Veins intrude Early Permian sandstone beds in anticlinal hinges. Veins range up to 1 km long, and 0.2 to 1 m thick, locally up to 10 m thick.  Sulfides form about 1 to 2%.  No observed wallrock alteration.  Quartz-lined vugs occur locally. 	Russia

R52-04	Aga-Kukan	R	52	04	69 04 19N	126 45 35E	69.0719444444444	126.759722222222	6904'N	12646'E	Southeast Missouri Pb-Zn and sediment-hosted Cu	Pb, Zn, Cu		Small. Up to 1-3% Cu; 0.15 ppm Au; up to 400 ppm Ag.	Dzhardzhan River 	Melnikov and Izrailev, 1975.	Consists of disseminated galena, sphalerite, and chalcopyrite that occurs in a layer in Lower Carboniferous (Tournaisian) limestone.  Layer is 40 cm thick; thickness of the hosting limestone member is 20 m.  Limestone unconformably overlies cross-bedded green sandstone and red siltstone that contains disseminated malachite, azurite, covellite, chalcopyrite, and Cu- hydrocarbonate films.  Cu-bearing sandstone and shale contains up to 3% Cu.  Sulfide are gently folded and occur for long distances.	Russia

R52-05	Anna-Emeskhin	R	52	05	68 55 38N	128 24 22E	68.9272222222222	128.406111111111	6856'N	12824'E	Au quartz vein	Au		Small. Up to 20 g/t Au; up to 23% As.	Verkhoyansk 	Arsky and others, written commun., 1963; Ivensen and others, 1975.	Consists of eight quartz-carbonate veins that occur over an area 70 by 100 m. Veins cut a dike of Triassic diabase.  Veins range up to 20 m long and up to 2 m thick.  Major minerals are arsenopyrite, pyrite, galena, and chalcopyrite.  Sulfides comprise 1 to 2% of veins. Diabase exhibits quartz-sericite-chlorite-albite-carbonate metasomatic alteration near veins.  	Russia

R52-06	Syugyunyakh-Kende	R	52	06	68 42 04N	127 45 38E	68.7011111111111	127.760555555556	6842'N	12746'E	Au quartz vein	Au		Small. Average grade of 5-8 g/t Au; locally up to 20 g/t Au; up to 50 g/t Ag.	Verkhoyansk 	Arsky, Borisov, and Lazurkin, written commun., 1963; Ivensen and others, 1975.	Description for two separate deposits about 20 km apart.  Each deposit consists of a set of sheet-like quartz veins that range up to 0.5 m thick. Major minerals are gold, arsenopyrite, pyrite, chalcopyrite, galena, and sphalerite. Veins intrude Middle Carboniferous argillite and sandstone. Veins occur in anticlinal hinges and do not extend along either strike or dip.  Sulfides comprise 1 to 3% of the veins.  	Russia

R52-07	Enichan-Tolono	R	52	07	68 11 29N	128 11 20E	68.1913888888889	128.188888888889	6811'N	12811'E	Au quartz vein	Au		Small. Average grade of 10-24 g/t Au.	Verkhoyansk 	Arsky, Borisov, and Lazurkin, written commun., 1963.	Consists of a set of thin quartz veins with minor sulfides. Veins occur in zones with contorted outlines.  Deposit less than 0.5 m thick and several ten of meters long.	Russia

R53-01	Burguat	R	53	01	70 41 51N	134 31 29E	70.6975	134.524722222222	7042'N	13431'E	Au quartz vein	Au		Small. Up to 5-8 g/t Au; up to 1% Pb; up to 1% Zn; up to 0.01% Ag.	Kular	Ivensen and others, 1975.	Consists of lenticular veins and shear zones of quartz and carbonate-quartz that contain gold and scarce sulfides (1 to 2%) including pyrite, galena, sphalerite, and chalcopyrite.  Veins strike northeast and dip steeply to southeast or northwest  at 50-65. Veins range from 0.1 to 4 m thick and up to 100 to 200 m long. Major minerals are carbonate, quartz, and sulfides, including  pockets and disseminations of pyrite, arsenopyrite, galena, and other minerals.  Gold is fine-grained, mostly 0.1 to 0.2 mm, with some to 3 mm.  Deposit hosted in Upper Permian and Triassic sandstone and shale.	Russia

R53-02	Dzhuotuk	R	53	02	70 13 25N	134 17 20E	70.2236111111111	134.288888888889	7013'N	13417'E	Au quartz vein	Au		Small. Average grade of 0.1-30.0 g/t Au; more than 1% As; up to 1% Pb, Zn; up to 0.1% Bi, Sn; up to 0.01% Ag.	Kular	Ivensen and others, 1975.	Consists of more than 20  deposits of steeply-dipping shear zones and cross-cutting veins that are hosted in Upper Permian and Lower Triassic clastic rocks.  Host rocks altered to silica and sulfide minerals. Individual deposits range up to 1500 m long and from 1 to 30 m thick.  Major minerals are quartz, carbonate, arsenopyrite, galena and pyrite, with lesser sphalerite and chalcopyrite.  Conformable and cross-cutting arsenopyrite-quartz veins range up to 1.5 m thick and up to 100 m long. 	Russia

R53-03	Tirekhtyak district (Nagornoe, Podgornoe, Poputnoe)	R	53	03	69 58 20N	134 40 32E	69.9722222222222	134.675555555556	6958'N	13441'E	Sn quartz vein	Sn, W		Small. Up to 5% Sn; up to 1% W03 ; up to 0.6% Pb; up to 1% As.	Kular	Ivensen and others, 1975.	Consists of veins of tourmaline-quartz and cassiterite-scheelite-quartz; and cassiterite stringers. Major minerals are beryl, pyrrhotite, arsenopyrite, muscovite, sphalerite, and galena. Veins and stringers range from 0.01 to 1.2 m thick and up to 100 m long. Veins and stringers strike northeast and occur near the contact of the Early Cretaceous Tirekhtyak granite pluton of Early Cretaceous age. Veins and stringers intrude aplite dikes and granites and adjacent Triassic clastic rocks that are contact metamorphosed.	Russia

R53-04	Baidakh	R	53	04	70 05 01N	135 31 38E	70.0836111111111	135.527222222222	7005'N	13532'E	Sb-Au vein	Sb		Small. Average grade of 39.9-72% Sb.	Verkhoyansk-Indigirka	Ivensen and others, 1975; Indolev and others, 1980.	Consists of a lenticular shear zone that ranges from 0.2 to 0.5 m thick and dips steeply to the southeast at 60. Shear zone cuts veins with a complex mineralogy.  Shear zones and veins contain breccia zones and stringers. Deposit occurs in anticlinal dome formed in Middle Triassic sandstone and shale.  Main minerals are stibnite, ankerite, and quartz.  Rare minerals are chlorite, pyrite, arsenopyrite, chalcopyrite, cinnabar, galena, sphalerite, calcite, kaolinite, and gold.  Shear zones and veins intrude diorite-porphyrite (Lower Cretaceous) and spessartite (Mid-Cretaceous) dikes. Wallrocks altered to graphite, sericite, and chlorite.	Russia

R53-05	Solur	R	53	05	70 01 23N	133 23 31E	70.0230555555556	133.391944444444	7001'N	13324'E	Granitoid-related Au	Au		Small. Up to 10 g/t Au; 0.03-1% W; 0.07-0.1% Bi; 0.03-0.1% Sn; 0.01-0.3% Cu.	Kular	Ivensen and others, 1975.	Consists of lenticular quartz and carbonate-quartz veins and shear zones that strike northeast and roughly east-west.  Major minerals are arsenopyrite, pyrite, chalcopyrite, galena, wolframite, bismuth, and gold. Deposit hosted in Late Permian clastic rocks in a zone adjacent to an Early Cretaceous granite pluton.  	Russia

R53-06	Kyuchyuss	R	53	06	69 47 57N	134 45 16E	69.7991666666667	134.754444444444	6948'N	13445'E	Sb-Au-Hg vein	Au, Hg, Sb		Large. Average grade of 4.5% As, up to 15% Sb, up to 0.6% Hg, and up to 300 g/t Au. Estimated reserves of 240 tonnes Au.	Verkhoyansk-Indigirka	Ivensen and others, 1975; Indolev and others, 1980; Konyshev and others, 1993.	Consists of steeply-dipping reverse shear zones that range from 0.1 to 1 m thick, and veins that range from 0.1 to 0.5 m thick. Veins and shear zones consist of quartz-stibnite, cinnabar-stibnite-quartz, realgar-quartz and quartz, with varying amounts of ankerite, calcite, kaolinite, dickite, arsenopyrite, pyrite, orpiment, berthierite, sphalerite, galena, bournonite, pyrrhotite, fahlore, mercury (up to 15%), and gold.  Ore minerals occur in stringers and disseminations. Veins and shear zones intrude Middle Triassic (Anisian and Ladinian) sandstone and siltstone that are part of a flysch sequence. Shear zones range up to 3 km long and, and based on drill data and data from two adit levels, extends 500 to 550 m deep.  Alteration minerals are argillite, hydromica, silica, and graphite. 	Russia

R53-07	Aragochan	R	53	07	69 44 28N	137 00 10E	69.7411111111111	137.002777777778	6944'N	13700'E	Polymetallic vein	Pb, Zn		Small. Average grade of 5.28% Pb; 3.6% Zn.	Yana-Polousnen		Consists of seven sheet-like veins. Veins range from 120 to 700 m long and 0.4 to 1.13 m thick.  Major minerals are quartz, calcite, siderite, galena, sphalerite, pyrite, and rare cassiterite. Veins hosted in Upper Jurassic sandstone and shale that dip 60-65 N. 	Russia

R53-08	Sigilyakh	R	53	08	69 54 17N	136 47 03E	69.9047222222222	136.784166666667	6954'N	13647'E	Sn silicate-sulfide vein	Sn		Small. Average grade of 1.27% Sn.	Chokurdak	Arsky and others, written commun., 1963.	Consists of veins that intrude contact metamorphosed Late Jurassic sandstone.  Veins range from 55 to 140 m long and 0.05 to 6.8 m thick. Veins strike northwest and  dip southwest at 60.  Major minerals are quartz, marcasite, pyrrhotite, chalcopyrite, galena, and sphalerite.	Russia

R53-09	Ulakhan-Sala	R	53	09	69 47 30N	136 39 51E	69.7916666666667	136.664166666667	6948'N	13640'E	Sn silicate-sulfide vein	Sn		Small.  Average grade of 0.84% Sn.	Yana-Polousnen	Arsky and others, written commun., 1963.	Consists of four quartz-tourmaline and tourmaline-chlorite-quartz veins that range from 320 to 1400 m long and 0.2 to 3.6 m wide.  Major minerals are cassiterite, pyrrhotite, arsenopyrite, sphalerite, chalcopyrite, galena, wolframite, scheelite, and calcite.  Veins are brecciated. Sn decreases with depth.  Wallrocks altered to silica and sulfides. Veins hosted in Late Jurassic sandstone and shale are display minor contact metamorphism. Host rocks form monocline that strikes from north to east. 	Russia

R53-10	Novoe	R	53	10	69 35 55N	133 06 32E	69.5986111111111	133.108888888889	6936'N	13307'E	Granitoid-related Au	Au		Small. Average grade of 0.2-6.8% W03 ; 0.03-0.16% Sn; 0.5-5% As.	Kular	Ivensen and others, 1975.	Consists of steeply-dipping, cross-cutting shear zones and lenticular veins in tension gashes.  Shear zones strike northeast and dip northwest or southeast at 15-60.  Shear zones commonly several meters thick, locally to 10- to12 m, and up to 1.5 km long.  Lenticular veins range from 0.1 to 2 m thick and up to 50 to 100 m long. Major minerals arequartz, wolframite, arsenopyrite, carbonates minerals, cassiterite, and gold.  Deposit hosted in Upper Permian sandstone and shale near the dome of the Central-Kular anticline.	Russia

R53-11	Argin	R	53	11	68 02 57N	135 50 06E	68.0491666666667	135.835	6803'N	13550'E	Sn quartz vein	Sn		Small. Up to 4.13% Sn.	Yana-Polousnen	Arsky and others, written commun., 1963.	Consists of a set of thin quartz veins and stringers that range from 1 to 10 cm thick. Major minerals are cassiterite, arsenopyrite, pyrrhotite, galena, wolframite, scheelite, tourmaline, and zinnwaldite. Most veins about 100-120 m long; one vein is 470 m long.  Deposit hosted in an Early Cretaceous granite altered to greisen. 	Russia

R54-01	Churpunnya	R	54	01	71 06 20N	141 42 55E	71.1055555555556	141.715277777778	7106'N	14143'E	Sn silicate-sulfide vein	Sn		Small. Up to 10% Sn.	Chokurdak	Nekrasov and Pokrovsky, 1973; Flerov and Shur, 1986; Kholmogorov, written commun., 1987.	Consists of shear zones, stringers, and veins with tourmaline and quartz-tourmaline; cassiterite (to 10%), sericite, maracasite, and 1-2% arsenopyrite, bismuth, bismuthine, wolframite, pyrrhotite, chalcopyrite, stannite, valleriite, siderite. Ore zones range from 0.1 to 0.7 m thick, are about one hundred meters long, and are drilled to a depth of 150 to 200 m. Deposit hosted in intensely tourmalinized and silicified rhyolite-dacite volcanic rocks and in a related Early Cretaceous granitoid stock.  	Russia

R54-02	Pavel-Chokhchurskoe	R	54	02	70 09 43N	140 47 34E	70.1619444444444	140.792777777778	7010'N	14048'E	Sn polymetallic vein and greisen	Sn		Average grade of 0.1-3% Sn; up to 1% As; up to 0.5% Cu; up to 0.1% Bi; up to 0.03% W, Mo, and Be; up to 0.01% In.	Chokurdak	Nekrasov and Pokrovsky, 1973; Prokhorova, Invanov, 1973.	Consists of stockworks, linear stringer, and veins that range up to 800 m long, are 1.5-5 m thick, and dip 60-80.  Individual veins and stringers range up to 0.01-10 cm thick. Major minerals arequartz (30-40%), tourmaline, topaz (1-5%), fluorite (to 50%), muscovite, cassiterite, arsenopyrite (to 80%), chalcopyrite (to 5-10%), pyrite, wolframite, and bismuthine.  Deposit hosted in contact metamorphosed Late Jurassic sandstone and siltstone, and in Early Cretaceous granite and granite-porphyry dikes and stocks. Deposit associated with greisen alteration.	Russia

R54-03	Ukachilkan	R	54	03	69 55 16N	139 19 25E	69.9211111111111	139.323611111111	6955'N	13919'E	Sn polymetallic vein	Sn		No data.	Chokurdak	Yakovlev, 1975; Flerov and Shur, 1986.	Consists of steeply-dipping shear zones and veins that strike about north-south and range up to 1,500 m long and up to 15-20 m thick. Major minerals are quartz, pyrrhotite, sphalerite, galena, calcite, sericite, pyrite, siderite, arsenopyrite, muscovite, marcasite, chalcopyrite, cassiterite, stannite, axinite, tourmaline, chlorite, wolframite, silver, bismuth, and sulfosalts.  Deposit has a vertical extent of 350 m. Shear zones and vein occur in an anticlinal dome in contact-metamorphosed Middle to Upper Jurassic and Upper Triassic sandstone and siltstone, and Upper Jurassic and Cretaceous rhyolite and quartz diorite porphyrite dikes. Deposit ooccurs adjacent to an Upper Cretaceous granodiorite stock. Wallrocks altered to silica and sericite	Russia

R54-04	Dalnee	R	54	04	69 49 15N	138 29 47E	69.8208333333333	138.496388888889	6949'N	13830'E	Polymetallic vein	Pb, Zn		No data.	Yana-Polousnen	Epov and Sonin,written commun.,  1964.	Consists of veins ranging from  0.05 to 1.0 m thick, up to 100 to 150 m long. Veins composed of quartz, manganosiderite, and galena veins with sphalerite and fahlore.  Veins intrude Late Jurassic sandstone and shale that are contact-metamorphosed by Cretaceous granite stock.	Russia

R54-05	Altinskoe	R	54	05	69 47 09N	142 14 14E	69.7858333333333	142.237222222222	6947'N	14214'E	Polymetallic vein	Pb, Zn		No data.	Yana-Polousnen	Epov and Sonin, written commun., 1964.	Consists of quartz-tourmaline veins that contain galena, sphalerite, pyrite, chalcopyrite, and arsenopyrite.  Veins range up to 1 m thick and up to 350 m long.  Veins intrude contact metamorphosed Middle Jurassic sandstone and Early Cretaceous granite.	Russia

R54-06	Odinokoe	R	54	06	69 42 09N	142 00 41E	69.7025	142.011388888889	6942'N	14201'E	Sn greisen	Sn		Average grade of 0.93-3.4% Sn; up to 1% W; up to 0.1% Bi; up to 0.5% As.	Chokurdak	Flerov and Shur, 1986; Kholmogorov, 1989.	Consists of disseminations and stringers.  Main minerals are fluorite, topaz, siderophyllite, zinnwaldite, muscovite, quartz, kaolinite, and cassiterite. Ore minerals are bismuth, sphalerite, pyrrhotite, chalcopyrite, molybdenite, pyrite, lllingite, arsenopyrite, siderite, wolframite, galena, stannite, bornite, bismuthine, columbite, monazite, and scheelite.  Sn minerals occur both in irregular, sub-equant pods and as thin, elongate, discontinuous layers.  Deposit occurs near top of a stock of Cretaceous subvolcanic granite-porphyry that is about 0.4 km2 . Stock intrudes Upper Jurassic sandstone and shale.  Deposit extends up to 300 m vertically. Located over the dome of the intrusion dome. 	Russia

R54-07	Polyarnoe	R	54	07	69 36 41N	141 45 28E	69.6113888888889	141.757777777778	6937'N	14145'E	Sn greisen and vein	Sn, W		No data.	Yana-Polousnen	Nekrasov, 1962; Epov and Sonin, written commun., 1964; Flerov, 1976.	Consists of quartz and quartz-topaz veins that dip gently to moderately (5-40) near within a stock of apogranite at the top of the major Cretaceous Omchikandin leucogranite batholith.  Veins range from 0.1 to 3.5 m thick, up to 300 m long, and extend up to 260 m down-dip.  Main minerals are quartz, topaz, fluorite, muscovite, zinnwaldite, wolframite, cassiterite, arsenopyrite, molybdenite, tourmaline, sphalerite, galena, pyrite, chalcopyrite, stibnite, bismuth, bismuthine, and bismuth sulfosalts.  Deposit associated with quartz-topaz greisen.	Russia

R54-08	Deputatskoe	R	54	08	69 15 19N	139 58 17E	69.2552777777778	139.971388888889	6915'N	13958'E	Sn polymetallic vein(?)	Sn		Large. Average grade of 0.3-0.7 Sn. Up to 10% Sn.	Chokurdak	Flerov, 1976.	Deposit includes about 150 separate ore bodies that occur in shear zones, veins, and linear stockwork zones. Deposit ranges up to 18 m thick and up to 1400 m long.  Minerals are quartz, tourmaline, chlorite, axinite, fluorite, pyrrhotite, cassiterite, chalcopyrite, pyrite, siderite, ankerite, sphalerite, galena, marcasite, wolframite, stannite, franckeite, boulangerite, bismuth, bismuthine, topaz, apatite, scheelite, and sulfosalts.  Main ore bodies occur in mineralized zones that are explored to depths of more than 350 m with adits and drillholes.  Wallrocks altered to silica, tourmaline, chlorite, and less common greisen and sulfides. Deposit hosted in contact metamorphosed Middle Jurassic shale and in an unexposed granite stock that is penetrated by drilling at 377 m depth. Stock has K-Ar isotopic age of 108 Ma. Pre-deposit coeval and post-deposit dikes of mafic, intermediate, and felsic intrusive rocks are wide-spread.  Many polymetallic veins occur in felsic and intermediate dikes.	Russia

R54-09	Djaktardakh	R	54	09	69 10 15N	141 20 11E	69.1708333333333	141.336388888889	6910'N	14120'E	Sn polymetallic vein	Sn		No data.	Chokurdak	Epov and Sonin, written commun., 1964; Flerov and Shur, 1986.	Consists of steeply-dipping veins, stockworks, and shear zones occur over an area of 0.25 km2. Veins range from 0.2 to 8 m thick, and are up to 750 m long. Minerals are quartz, chlorite, tourmaline, arsenopyrite, pyrrhotite, cassiterite, pyrite, calcite, siderite, fluorite, wolframite, amphibole, and epidote.  Deposit occurs in contact metamorhosed Upper Triassic clastic deposits that are intruded by Upper Cretaceous monzonite and lamprophyre dikes and by a stock of Lower Cretaceous granite porphyry.  Polymetallic veins controlled by dikes. Deposit extends vertically to at least 180 m.  Workings consist of an adit and drill holes. 	Russia

R54-10	Takalkan	R	54	10	68 58 41N	139 43 46E	68.9780555555556	139.729444444444	6859'N	13944'E	Sn greisen	Sn		Average grade of 0.02-1.0% Sn.	Yana-Polousnen	Nekrasov, 1962; Epov and Sonin, written commun., 1964.	Consists of a stockwork zone that strikes nearly north-south and ranges up to 700 m long and up to 170 m wide.  Stockwork includes tourmaline-muscovite-quartz and topaz-muscovite-quartz veins and stringers that range up to 0.55 m thick. Main minerals are fluorite, arsenopyrite, wolframite, cassiterite, beryl.  Rare topaz-muscovite-quartz greisen bodies range up to 1.4 m thick.  Deposit hosted in Cretaceous leucocratic biotite granite pluton that is intensely altered to greisen.	Russia

R54-11	Gal-Khaya	R	54	11	68 53 19N	140 17 34E	68.8886111111111	140.292777777778	6853'N	14018'E	Carbonate-hosted Hg 	Hg		No data.	Selennyakh River	Babkin, 1975.	Consists of a zone of quartz-carbonate breccia and veins that occurs along the contact of Lower Silurian limestone and calcareous shale. Zone is 600 m long, 60 to 80 m wide, dips 75, and occurs concordant to host rock bedding. Breccia and veins occur in cylindrical ore shoots, mainly in carbonate breccia cemented with calcite and quartz-calcite. Main ore mineral is cinnabar. Also present are metacinnabarite, galkhaite (Hg, Cu, Zn, Tl) (As, Sb), stibnite, realgar, orpiment, pyrite, chalcopyrite, fluorite, barite, native gold, tennantite, sphalerite, bornite, chalcocite, covellite, malachite, and azurite. Gangue minerals are quartz, calcite, dolomite, barite, dickite, kaolinite, and bitumen (anthraxolite).	Russia

R54-12	Tommot	R	54	12	68 23 51N	141 13 51E	68.3975	141.230833333333	6824'N	14114'E	Carbonatite-related REE (Ta, Nb)	REE, Ta, Nb		Grab samples contain 0.1-0.2% Y; 0.1-0.5% Zr; 0.01-0.5% Nb.	Tommot River	Nekrasov, 1962; L.M. Parfenov and P.W. Layer, written commun., 1994.	Deposit occurs in fenite, metasomatic alkalic pegmatite, and aegirine granite that intrude early Paleozoic schist adjacent to a zoned Late Devonian (?) alkalic gabbroid-syenite pluton.  Pluton exhibits center-to-periphery zoning: (1) gabbro with pyroxenite lenses; (2) monzonite; (3) sodium syenite; (4) quartz syenite and granite; and (5) fenitized metamorphic shale with metasomatic aegirine granite lenses.  Deposit consists of 20 ore bodies, mainly metasomatic veins and lenses that range from several cm to 25 m thick and  up to several hundred meters long.  Most important elements are Y, Ce, La, Ta, and Nb.  Lesser elements are   Zr, Tb, U, Be, Hf, Yb, Dy, Tb, Pr, Sm, Eu, Pb, and Zn.  Main ore minerals are chevkenite, yttrialite, monazite, and melanocerite-caryocerite group.  Less common are yttrotitantite, hydrothorite, pyrochlore, fergusonite, gadolinite, and zircon.  Wall rocks metasomatically altered adjacent to dikes. U-Pb isotopic age for syenite of 368 Ma (U-Pb dating) and Ar-Ar isotopic age of 306-293 Ma.	Russia

R54-13	Khatynnakh-Sala	R	54	13	68 17 49N	141 23 46E	68.2969444444444	141.396111111111	6818'N	14124'E	Au quartz vein	Au		Average grade of 0.2-2 g/t  Au.	Selennyakh River	Nekrasov, 1959; Nekrasov, 1962; Epov and others, written commun., 1964.	Consists of 30 veins, lenses, lenticular bodies, and stockworks. Veins generally less than 1 m thick, range from 15 to 20 m long, and less than 30 to 40 m long. Two levels of intensely sulfidized shale, from 0.4-6 m thick and up to 250 m long, also occur in the deposit. Besides pyrite and pyrrhotite, main minerals are arsenopyrite, galena, fahlore, sphalerite, and gold. Gangue minerals constitute 95% of the deposit and include quartz, albite, ankerite, barite, and fluorite. Pyrite is altered to pyrrhotite, and metamorphic actinolite, zoisite, biotite, sphene replace gangue minerals along with recrystallization of quartz. Deposit hosted in anticlinal domes and is controlled by bedding-plane faults.  Most of veins and and host rocks are isoclinally folded. Host rocks are Ordovician and Silurian amphibole-mica-carbonate shale and limestone locally metamorphosed to marble. Post-deposit, Late Jurassic to Early Cretaceous diabase and diorite porphyrite dikes intrude deposit. A Late Paleozoic age is interpreted for the deposit and associated metamorphism. 	Russia

R54-14	Chistoe	R	54	14	68 12 00N	141 25 57E	68.2	141.4325	6812'N	14126'E	Pb-Zn vein	Pb, Zn		No data.	Selennyakh River	N.A. Goryachev, written commun., 1993.	Consists of a galena vein that occurs in a shear zone in Ordovician limestone that is locally metamorphosed to marble. The vein varies from 10  to 20 m thick and is about ten meters long. Major mineral is galena with lesser also pyrite, sphalerite (cleiophane), chalcopyrite, cerussite, and smithsonite. Oxidized minerals are locally abundant.	Russia

R54-15	Chibagalakh	R	54	15	68 13 25N	139 50 41E	68.2236111111111	139.844722222222	6813'N	13951'E	Sn-B skarn	B, Sn		No data.	Darpir	Flerov and others, 1974.	Consists of several tens of magnesium skarns that range from 0.2 up to 20 m thick and up to 260 m long. Skarns occur at the contact of an Early Cretaceous granitic pluton that intrudes Ordovician and Silurian dolomite and limestone.  Skarn contains B ores, and adjacent limestone altered to skarn and greisen contain Sn ore.  Main B minerals are suanite, ludwigite, kotoite, fluorite, magnetite, plagioclase, calcite, spinel, pyroxene, forsterite, phlogopite, clinohumite, talc, and serpentine.  Sn skarn minerals are cassiterite, plagioclase, pyroxene, garnet, wollastonite, quartz, scheelite, fluorite, hornblende, epidote, calcite, chlorite, muscovite, axinite, tourmaline, pyrrhotite, arsenopyrite, magnetite, sphalerite, chalcopyrite, lllingite, and valleriite.  Most skarns occur as beds, lenses, pockets, shoots, and veins. Skarns occur along contacts between the intrusion and carbonate country rock, in intrusion apophyses, along contacts between various sedimentary rocks, and in large carbonate xenoliths.	Russia

R55-01	Tuguchak-1	R	55	01	69 29 47N	149 19 17E	69.4963888888889	149.321388888889	6930'N	14919'E	Mo quartz vein

	Mo		Average grade of 0.05-1.2% Mo; 0.1-0.3% As. 

	Yana-Polousnen	Bakharev and others, 1988.	Consists of a  set of Mo quartz veins that range from 100 to 500 m long and 0.1 to 1.3 m thick. Veins dip gently (20) south.  Veins cut Early Cretaceous granodiorite of the Ulakhan-Tass pluton.

	Russia

R55-01	Tuguchak-2	R	55	01	69 29 47N	149 19 17E	69.4963888888889	149.321388888889	6930'N	14919'E	Granitoid-related Au	Au, W, Bi, Te		Up to 10 g/t Au; up to 0.25% Bi; up to 0.08% Te.	Yana-Polousnen	Bakharev and others, 1988.	Consists of steeply-dipping, cross-cutting quartz veins with tourmaline, muscovite, arsenopyrite, wolframite, bismuth, ikunolite, bismuthine, hedleyite, A and B joseite, and gold (fineness 400-1000).  Veins range up to 1 m thick and 100 m long and strike north-south.  Au quartz veins cut molybdenite-quartz veins that form Tuguchak-1 deposit. Deposit hosted in Early Cretaceous granodiorite and is associated with beresite alteration of granodiorite.	Russia

R55-02	Arbatskoe	R	55	02	69 28 23N	149 40 51E	69.4730555555556	149.680833333333	6928'N	14941'E	Co skarn	Co		Up to 1% Co; up to 0.2% Mo; up to 5% As; up to 0.5% Bi.	Yana-Polousnen	Nekrasov, 1962; Bakharev and others, 1988.	Consists of garnet-pyroxene and pyroxene skarn with disseminated and massive sulfoarsenite. Skarn occurs in country rock along the northern contact of the Early Cretaceous Ulakhan-Tass granite pluton, mainly along contacts between marmorized limestone and contact metamorphosed Permian sandstone and shale.  Main minerals are arsenopyrite, pyrrhotite, lllingite, cobaltite, glaucodot, gersdorffite, niccolite, pyrite, molybdenite, sphalerite, and galena. Lesser minerals are epidote, hastingsite, and chlorite.	Russia

R55-03	Kandidatskoe	R	55	03	69 24 24N	149 43 48E	69.4066666666667	149.73	6924'N	14944'E	Au skarn	Au, Co, As		Up to 55 g/t Au; up to 3% Co; up to 20% As; up to 0.5% Bi; up to 3% Zn; up to 0.5%Ni; up to 0.1% Te.	Yana-Polousnen	Nekrasov, 1962; Bakharev and others,  1988.	Consists of zones of garnet-pyroxene, pyroxene-wollastonite, pyroxene, and epidote-pyroxene skarn that range up to 100 to 150 m long and up to 50 m thick.  Zones occur in a block of Devonian carbonate and Permian clastic rocks that occur between granodiorite of the Lower Cretaceous Ulakhan-Tass pluton and monzonite of the mid-Cretaceous Kandidatsky stock.  The main (No. 1) ore body  occurs as a steeply-plunging, funnel-shaped pipe of massive and disseminated ore with an outcrop area of 150 m long and up to 20 m wide. Main minerals are arsenopyrite, lllingite, pyrrhotite, molybdenite, glaucodot, cobaltite, gold, bismuth, bismuthine, maldonite, hedleyite, and A and B joseites.  Gold is fine-grained (98% less than 0.08 mm), with fineness of 650-1,000. At the adit level (50 m), thickness of the ore body is half of that at surface.	Russia

R55-04	Dokhsun	R	55	04	69 25 34N	144 27 22E	69.4261111111111	144.456111111111	6926'N	14427'E	Polymetallic vein	Pb, Zn, Cu		No data.	Yana-Polousnen	Epov and Sonin, written commun., 1964.	Consists of quartz-sulfide and chlorite-quartz veins that range from 0.15 to 1.4 m thick and up to 650 m long. Main minerals are galena, sphalerite, chalcopyrite, and chalcocite.  Veins cut Lower-to-Middle Jurassic sandstone and shale.  Sulfides usually comprise less than 5-10% of veins.	Russia

R55-05	Kondakovskoe	R	55	05	69 18 49N	149 49 29E	69.3136111111111	149.824722222222	6919'N	14949'E	Southeast Missouri Pb-Zn	Pb, Zn		Up to 0.1% Cd, 0.05-1% Pb, 0.08-1.5% Zn, and 0.01-0.3% Sb.	Selennyakh River	Bakharev and others, 1988.	Consists of broad disseminations and pockets of sulfides in Devonian limestone that is locally metamorphosed to marble.  Deposit occurs along the southern contact of the Lower Cretaceous Ulakhan-Siss granodiorite pluton.  Deposit forms a layer up to several hundred meters long and consists of galena-sphalerite with lesser common pyrite-tetrahedrite.  	Russia

R55-06	Polevaya	R	55	06	69 08 23N	149 06 28E	69.1397222222222	149.107777777778	6908'N	14906'E	Au-Ag polymetallic vein	Au, Ag		Up to 10 g/t Au; up to 10 g/t Ag; up 0.020-1% Pb; up 0.050-1% Zn; up 0.005-0.3% Cu; up to 0.5% Sn.	Chokurdak	Nekrasov, 1962; Bakharev and others, 1988.	Consists of two thin, subparallel zones of intensely silicified and sericitized granodiorite and quartz diorite. Zones range from 1 to 2 m thick and up to 500 m long.  Zones occur along and near the contact of an Early Cretaceous pluton that forms the core of a complex, Late Jurassic to Late Cretaceous volcanoplutonic structure. Major minerals are chalcedony-like cryptocrystalline quartz, calcite, pyrite, galena, sphalerite, chalcopyrite, and gold.  Sulfide content about 2-3%.	Russia

R56-01	Khomustak	R	56	01	70 04 52N	152 27 48E	70.0811111111111	152.463333333333	7005'N	15228'E	Sn greisen	Sn		Up to 1% Sn; up to 0.2% Li; up to 1% As; up to 0.5 Bi.	Chokurdak	Bakharev and others, 1988.	Occurs in two forms. (1) Quartz-muscovite and topaz-quartz greisen with cassiterite, arsenopyrite, beryl, and fluorite that occur in altered dikes of Late Cretaceous granite. Dikes intrude contact metamorphosed Late Jurassic siltstone, are up to 15 m thick, and  up to 100 m long. (2)   Zones of siderophyllite-quartz, tourmaline-muscovite-quartz, siderophyllite-fluorite greisen with topaz, arsenopyrite, pyrite and cassiterite that occur in the Late Cretaceous Sredny granite pluton. Zones range from 0.5 to 5 m thick, up to 500 m long, and occur in an area of about 1 km2.  Albite-altered granite with fluorite locally forms 20% of the rock.	Russia

R56-02	Primorskoe	R	56	02	69 55 50N	153 21 56E	69.9305555555556	153.365555555556	6956'N	15322'E	Sn polymetallic vein	Sn	Pb, Zn, As	Up to 1% Sn; 0.01-5% Pb; 0.01-3% Zn; 0.005-3% As.	Chokurdak	Bakharev and others, 1988.	Consists of a set of three subparallel zones of quartz-chlorite altered areas and veins containing cassiterite, stannite, galena, sphalerite, chalcopyrite, arsenopyrite, scarce freibergite, canfieldite, muscovite, tourmaline, and fluorite.  Zones range from 1-2 m thick and up to 300-500 m long. Deposit hosted in medium-grained, Early Cretaceous biotite granodiorite.  	Russia

R56-03	Balyktaah, Ploskoe	R	56	03	69 49 36N	151 48 15E	69.8266666666667	151.804166666667	6950'N	15148'E	Sn greisen	Sn		Up to 1% Sn; up to 1% Pb; up to 0.3% Cu.  	Yana-Polousnen	Bakharev and others, 1988.	Consists of two nearby deposits.  Deposits consists of zones of quartz-muscovite and tourmaline-quartz greisen with fluorite, chlorite, cassiterite, galena, chalcopyrite, arsenopyrite, and pyrite. Deposits hosted in the apical portions of a Late Cretaceous granite pluton.  Zones range up to 50 m thick and 100-150 m long.  Sulfide content ranges up to 5%.	Russia

R56-04	Chistoe	R	56	04	69 43 26N	150 14 55E	69.7238888888889	150.248611111111	6943'N	15015'E	Granitoid-related Au	Au	W, Bi, Te	Up to 20 g/t Au; up to 0.9% W; up to 0.5% Bi; up to 1% As.	Yana-Polousnen	Bakharev and others, 1988.	Consists of a set of quartz veins that range from 10 to 50 m long and from 0.1 to 0.5 m thick. Veins occur in two steep-lying northeast-striking shear zones that range up to to 500 m long and are hosted in contact metamorphosed Upper Jurassic  sandstone and in Lower Cretaceous granodiorite stocks.  Main minerals are muscovite, quartz, tourmaline, arsenopyrite, cobaltite, calcite, wolframite, native bismuth, native gold (fineness 500-1000), bismuthine, joseite (A, B, M, L types), and maldonite.  Veins are associated with greisen zones that range up to 1 to 2 m wide.  	Russia

R56-05	Verkhne-Naanchan	R	56	05	69 39 16N	150 40 53E	69.6544444444444	150.681388888889	6939'N	15041'E	Polymetallic vein	Pb, Zn		Up to 1.5% Pb; up to 1.5% Zn; up to 0.1% Cd; up to 0.005% Sn.	Yana-Polousnen	Bakharev and others, 1988.	Consists of a set of en-echelon zones of veins in a Lower Cretaceous granitic pluton that displays chlorite and silica alteration.  Zones is 2 m thick and range up to about a hundred m long.  Zones contain massive sulfide lenses with galena, sphalerite, pyrite, and chalcopyrite that are associated with with aureoles of disseminated sulfides and chlorite alteration.	Russia

R56-06	Yuzhnoe	R	56	06	69 30 38N	150 41 46E	69.5105555555556	150.696111111111	6931'N	15042'E	Polymetallic vein	Pb, Zn		Up to 0.1% Pb; up to 1% Zn; 1-7 g/t Ag.	Chokurdak	Bakharev and others, 1988.	Consists of a shear zone with quartz-carbonate contains galena, pyrite, and limonite.  Deposit is hosted in black Devonian limestone, adjacent to the southeast contact of a Late Cretaceous syenite intrusion.  Deposit ranges up to 2 m thick and 250 m long.	Russia

R58-01	Ichatkin	R	58	01	69 40 57N	163 11 10E	69.6825	163.186111111111	6941'N	16311'E	Sn silicate-sulfide vein   	Sn	W, Zn, Pb, Sb	Small.  Low-grade ores.  	Eastern Asia-Arctic: Chaun	Zivert, written commun., 1951; Korolev, written commun., 1953	Metasomatic quartz-tourmaline veins up to 100 m long and 4-5 m thick, and morphologically complex zones up to 40 m wide, contain arsenopyrite, chalcopyrite, sphalerite, pyrrhotite, galena, scheelite, stibnite, magnetite, and cassiterite.  Tin mineralization (cassiterite) is not easily recognized in hand specimen.  Deposit occurs within the Early Cretaceous Ichatkin granitic body.  Alteration includes kaolinization, tourmalinization, and lesser silicification, sulfidization, and greisenization.  Quartz-tourmaline veins often grade into quartz-sulfide veins along strike.  Deposit not explored below a depth of 50 m.	Russia

R58-02	Kanelyveen	R	58	02	69 18 54N	164 03 32E	69.315	164.058888888889	6919'N	16404'E	Granitoid-related Au	Au	As	Medium.  Average grade of 4.3 to 19.5 g/t Au.  	Eastern Asia-Arctic: Anuyi-Beringovsky	Sadovsky, written commun., 1970	Quartz and sulfide-quartz veins, stockworks, and mineralized brecciated zones contain gold, pyrite, arsenopyrite, chalcopyrite, and stibnite.  Veins, stockworks, and mineralized zones occur in contact-metamorphosed Triassic shales and sandstones in contact with Early Cretaceous diorite intrusions.  Gold is commonly disseminated in arsenopyrite.  Quartz-sulfide veins with tourmaline, tetradymite, chalcopyrite, molybdenite, proustite (Ag3AsS3) and pyrargyrite are less common.  Individual veins vary in thickness and strike.  Most veins extend for no more than 60 or 70 m, but some are up to 200 m long.	Russia

R58-03	Yassnoe	R	58	03	68 22 53N	167 47 53E	68.3813888888889	167.798055555556	6823'N	16748'E	Clastic sediment-hosted Hg or hot-spring Hg?	Hg		Small.  Up to 3% Hg.  	Eastern Asia-Arctic: Chaun	Babkin, 1969	Cinnabar occurs in bands and lenses 0.2-0.8 m thick in zones of brecciated, silicified, and kaolinized rocks along a northeast-striking fault.  Deposit occurs in sedimentary rocks that include Upper Triassic siltstone and shale and Lower Cretaceous sandstone that are intruded by Early Cretaceous diorite, lamprophyre, and rhyolite stocks and dikes.	Russia

R58-04	Ozernoe	R	58	04	68 15 22N	165 55 45E	68.2561111111111	165.929166666667	6815'N	16556'E	Au quartz vein   	Au		Small.  Average grade of 19.2 to 48.1 g/t Au.  	Chukotka	Kopytov and Vyalov, written commun., 1961	Consists of steeply-dipping, northwest-trending quartz veins, 0.5-1.5 m thick and from 50 m to 230 m long that contain disseminated gold, arsenopyrite, and galena.  Sulfide content of veins is less than 1-2%.  Gold (814 fine), occurs as separate inclusions, up to 4 mm in size, and as intergrowths in sulfides.  Gold content is rather high.  Wallrock alteration includes silicification, carbonatization, and the development of epidote, zoisite, and albite.  Veins occur in an Upper Triassic sedimentary sequence intruded by granite bodies and diorite porphyry dikes.	Russia

R58-05	Karalveem	R	58	05	68 10 45N	166 09 14E	68.1791666666667	166.153888888889	6811'N	16609'E	Au quartz vein   	Au	W	Medium.  Prospected and developed preparatory to mining.  	Chukotka	Olshevsky, 1974, 1976, 1984; Davidenko, 1975, 1980; Skalatsky and Yakovlev, 1983	Consists of numerous longitudinal, transverse, and diagonal, steeply-dipping ladder quartz veins up to several meters thick that occur in Triassic gabbro-diabase sills, especially near their contacts with Triassic sandstone and shale.  The sedimentary rocks and sills are strongly contorted into narrow, steep, northwest-trending folds.  Gold ore bodies are controlled by strike-slip faults associated with the folding.  Host rocks exhibit greenschist facies metamorphism.  Silica-carbonate alteration and sulfidization occur adjacent to ore zones.  Veins are 95-97% quartz with segregations of arsenopyrite and lenses of scheelite, albite, ankerite, and muscovite.  Calcite, dolomite, potassium mica, galena, native gold (780-812 fine), topaz, aquamarine, sphalerite, pyrite, and pyrrhotite are wide-spread.  Gold is mainly associated with bluish-gray quartz veinlets in a matrix of coarse-grain quartz and arsenopyrite, in the upper horizons of the deposit.  Near the surface, quartz veins often host druse-like intergrowths of large, well-crystallized quartz and isometric gold crystals.  Coarse-grained masses of gold, and less common dendritic gold, up to 1 cm in size are characteristic of the deposit.  At depth, the gold occurs mainly as fine, dispersed masses in arsenopyrite.	Russia

R59-01	Kekur	R	59	01	69 48 56N	171 51 53E	69.8155555555556	171.864722222222	6949'N	17152'E	Sn silicate-sulfide vein   	Sn	Bi, As, Cu	Small.  Average grade of 0.3 to 2.0% Sn.  	Eastern Asia-Arctic: Chaun	Peltsman, written commun., 1988	Steeply dipping, quartz-tourmaline and quartz-topaz veins contain chlorite, muscovite, fluorite, cassiterite, pyrite, marcasite, arsenopyrite, chalcopyrite, galena, and bismuthinite.  Veins vary in thickness and are related to domes of the Severny biotite granite.	Russia

R59-02	Valkumei	R	59	02	69 39 02N	170 12 28E	69.6505555555556	170.207777777778	6939'N	17012'E	Sn silicate-sulfide vein   	Sn		Large.  Discovered in 1935, mined from 1941 to present.  Average grade 0.4-1.2% Sn.  	Eastern Asia-Arctic: Chaun	Lugov, Makeev, and Potapova, 1972; Lugov, 1986	Simple and complex veins, mineralized zones, and less common linear stockworks, occur mainly within the marginal zone of the Late Cretaceous Pevek granite-adamellite-grandiorite pluton, and to a lesser degree in the Cretaceous sandstone and shale which host the pluton.  Mineralization occurs in a north-northwest trending zone alone the contact of the pluton.  Ore bodies commonly consist of a conjugate system with major north-south veins and feathered veinlets, and a zone of veins with approximately east-west and northwest trends.  Seventy minerals are known from the deposit, but the majority of the veins are composed dominantly of tourmaline, with quartz, chlorite, albite, arsenopyrite, cassiterite, pyrrhotite, chalcopyrite, stannite, sphalerite, stibnite, fluorite, and various carbonates.  Ore bodies are vertically extensive.  Cassiterite-quartz-tourmaline veins are replaced by sulfide veins at depth.	Russia

R59-03	Pyrkakai	R	59	03	69 33 27N	171 57 01E	69.5575	171.950277777778	6933'N	17157'E	Porphyry Sn	Sn, W	Au, Ag, Zn, Cu, Pb, Bi, In, Cd	Large.  Prospected and developed preparatory to mining.  Average grade 0.21% Sn.  	Eastern Asia-Arctic: Chaun	Tsvetkov and Epifanov, 1978; Epifanov and Tsvetkov, 1980; Tsvetkov, 1984, 1990	Deposit is a linear stockwork composed of subparallel, steeply dipping sulfide-quartz veinlets.  Three ore zones occur in Upper and Middle Triassic shale and subordinate sandstone.  The major ore structures are north-striking fissure zones.  Magmatic sequence associated with the veins includes numerous Upper to Lower Cretaceous dikes of quartz syenite, granodiorite and monzonite porphyry, diorite porphyry, and lamprophyre.  Tin-bearing stockworks occur along the periphery of a deep-level granitic intrusion (the lower zone of mineralization), and above its apical portion (the upper zone).  Mineralized zone is bounded by a steeply dipping contact of the pluton that extends for about 30 km along strike.  Deposit has a vertical range of at least 300 m.  More than 60 primary and supergene minerals are known.  Quartz, muscovite, pyrrhotite, arsenopyrite, pyrite, fluorite, cassiterite, wolframite, sphalerite, and sometimes topaz and albite, are the most common minerals.  In altered rocks, quartz, tourmaline, sericite, and chlorite are common.  The veinlets contain 6 to 9% sulfides.  Gold occurs mainly in arsenopyrite; silver is mainly associated with galena, sphalerite, and pyrite; zinc, copper, lead, indium, cadmium and bismuth also are present.  Latest-formed mineralization is similar to epithermal gold-silver deposits associated with volcanic rocks.	Russia

R59-04	Sredne-Ichuveem	R	59	04	69 13 42N	172 56 08E	69.2283333333333	172.935555555556	6914'N	17256'E	Au quartz vein   	Au	W	Small. Indiviudal samples contain from 0.2 to 400 g/t Au.  	Chukotka	Poznyak, written commun., 1959; Sidorov, 1966; Sosunov, written commun.,1977	Deposit consists of sulfide-quartz, carbonate-quartz, and quartz veins, and vein-stockwork zones that generally trend north-south, but less commonly east-west.  Veins are confined to a dome of a small anticline composed of Upper Triassic shale, siltstone, and sandstone.  Mineralization is controlled by an east-west-trending broken zone marked by rhyolite dikes.  Gold-bearing veins are confined to shale.  About 60 veins and zones of ore bodies occur in an area of approximately 6 km2.  Individual veins are 20 to 100 m long with varying thickness and orientation.  Zones with veins and veinlets are up to hundreds of meters long and up to 15 m thick.  Sulfides make up 6-10% of the veins and consist mainly of pyrite, arsenopyrite, galena, sphalerite, and chalcopyrite; with minor but wide-spread wolframite and scheelite.  Gold (850-950 fine) is disseminated as masses 2 mm up to 1.5 cm in size, and commonly associated with galena.  Gold content of the veins is uneven with local high-grade concentrations.	Russia

R59-05	Palyan	R	59	05	69 01 01N	172 08 35E	69.0169444444444	172.143055555556	6901'N	17209'E	Clastic sediment-hosted Hg or hot-spring Hg?	Hg		Estimated 10,117 t Hg in ore containing 0.53% Hg.  	Eastern Asia-Arctic: Chukotka	Syromyatnikov, 1972; Babkin, 1975; Syromyatnikov, Dubinin, 1978	Stockworks and podiform mercury occurrences are in upper Cretaceous sandstone and shale overlying a deeply eroded, volcanic dome; now exposed as a block of volcaniclastic rock with an intrusive core.  Mercury mineralization occurred in several stages and deposits formed at the intersections of major north-south and east-west faults.  Localization of the ore bodies is greatly influenced by extensive layering in the volcanic rocks, and zones of tectonic disruption and explosive brecciation.  More than 30 minerals are characteristic of the veinlets and disseminated ore bodies, including:  quartz, dickite, dolomite, siderite, calcite, cinnabar, marcasite, pyrite, galena, sphalerite, native arsenic, realgar, and nickel minerals.  Wall-rock alteration has not been identified.	Russia

R59-06	Maiskoe	R	59	06	69 02 22N	173 43 46E	69.0394444444444	173.729444444444	6902'N	17344'E	Disseminated Au-sulfide    	Au, As, Sb, Ag		Medium to large? Proven reserves of 23 million tonnes with average grade 12 g/t Au.	Eastern Asia-Arctic: Anuyi-Beringovsky	Sidorov and others, 1978; Gavrilov, Novozhilov, and Sidorov, 1986; Olshevsky and Mezentseva, 1986; Sidorov, 1966, 1987; Benevolskyi and others, 1992	Deposit is associated with linear shear zones that generally trend north-south, have variable strike and dip, and that are marked by distinctive cleavage, fissuring, contortion, and boudinage.  Mineralization consists of veinlets and disseminated zones of gold-bearing pyrite and arsenopyrite.  Ore zones are confined to the more plastic rocks such as siltstone, and silty shale, and shale in a Middle(?)- and Upper-Triassic flysch sequence.  Folding and zones of plastic flowage are discordant to a plicated structure within a horst-like block, which occurs in a large domal uplift.  Sedimentary rocks are intruded by dikes of quartz-feldspar porphyry, granite, granosyenite porphyry, Early Cretaceous lamprophyre (kersantite and minette), Late Cretaceous rhyolite, as well as by vein-like bodies of intrusive breccia of Okhotsk-Chukota volcanic-plutonic belt.  Magmatic rocks are beresitized and kaolinized.  Carbonaceous rocks are metamorphosed to phyllite.  There is also weak sericitization, carbonatization, graphitization, and irregular silicification.  Ore consists mainly of disseminated high-grade gold in acicular arsenopyrite and arsenic-rich pyrite.  A later quartz-stibnite (with native arsenic) stage of mineralization is also widespread within the ore zones.  Beyond the ore zones, veins occur mainly in sandstone dikes and consist of molybdenite-quartz and rare metal-polysulfide-quartz ore bodies accompanied by cassiterite, scheelite, wolframite, bismuth minerals, tetrahedrite-tennantite, and lead and silver sulfosalts.  Gold mineralization is vertically and areally extensive.	Russia

R59-07	Gora Sypuchaya	R	59	07	68 58 43N	172 57 06E	68.9786111111111	172.951666666667	6859'N	17257'E	Au quartz vein and Au-sulfide disseminated	Au	Sb, As	Medium.  Average grade of 1 to 12,356 g/t Au.  	Eastern Asia-Arctic: Anuyi-Beringovsky	Sidorov, 1966; Fadeev and others, 1986; Volkov, 1990	Mineralized fractured zones, and zones of contortion and brecciation, contain axial quartz veins in deflections and limbs of small synclines and flexures.  Ore bodies are confined to parallel, slight dislocations, which are mainly conformable to the Upper Triassic laminated sandstone hosting the deposit.  Veins and zones of veinlets contain gold, pyrite, arsenopyrite, galena, sphalerite, chalcopyrite, tetrahedrite, and lead sulfosalts.  Stibnite is associated with disseminated gold-sulfide mineralization which contains gold-bearing pyrite and fine, acicular arsenopyrite in fractured and folded zones.  Low and moderate grade deposit.	Russia

R59-08	Kyttamlai	R	59	08	68 53 37N	167 59 41E	68.8936111111111	167.994722222222	6854'N	16760'E	Clastic sediment-hosted Hg or hot-spring Hg?	Hg, Sb		Small.  	Eastern Asia-Arctic: Chukotka	Babkin, 1975	Mineralized zones in brecciated sandstone and sandy shale are confined to faults trending approximately east-west and northwest, which splay off a major northeast trending fault.  Deposit occurs in Early Cretaceous clastic sedimentary rocks deformed into northwest-trending folds.  Mercury-bearing zone, which is 200 km long and 20-30 m wide, trends northwest.  Few magmatic rocks occur in the area.  Mercury-bearing zones form parallel chains of ore bodies, several tens of meters apart, up to 50-100 m long and 0.4-0.5 m thick.  Cinnabar and stibnite is present in quartz-carbonate, quartz, and carbonate-kaolinite vein material that cements the matrix.  Disseminated ores are the most wide-spread; disseminated veinlets and cockade ore are less common.	Russia

R59-09	Promezhutochnoe	R	59	09	68 53 15N	173 47 58E	68.8875	173.799444444444	6853'N	17348'E	Au-Ag epithermal vein	Au, Ag	Sb	Small.  Grade ranges from traces to 887 g/t Au and up to 10,357 g/t Ag.  	Eastern Asia-Arctic: Anuyi-Beringovsky	Sidorov, 1966, 1978	Ore bodies consist of:  (1) quartz breccia veins with disseminated arsenopyrite, pyrite, marcasite, and silver sulfosalts;  (2) quartz veins with segregations of stibnite, silver sulfosalts, and gold;  (3) auriferous quartz veins with chalcopyrite, galena, sphalerite; and  (4) auriferous stibnite-quartz veins.  Individual ore bodies are several hundred meters long and up to 10 m thick.  Veins are characterized by brecciated structures with banded quartz coating sedimentary rock clasts.  Host rock is shale interbedded with fine-grained sandstone, and occurs on the limb of a broad syncline that is cut by a set of east-west trending, Late Cretaceous trachyandesite and andesite dikes, which are cut by the veins.	Russia

R59-10	Draznyaschy, Upryamy	R	59	10	68 33 40N	168 34 28E	68.5611111111111	168.574444444444	6834'N	16834'E	Au-Ag epithermal vein	Au	As, Pb, Zn	Small.  Grade ranges from 15.4 to 164 g/t Au and to 10 g/t Ag.  	Eastern Asia-Arctic: Anuyi-Beringovsky	Zhukov and Pole, 1974	Discontinuous, ankerite-quartz veins, less than 100 m long, and vein-like breccia bodies cemented by quartz, form an en-echelon mineralized zone that extends for about 500 m.  Ore bodies occur adjacent to a sedimentary rock of Upper Jurassic and Lower Cretaceous volcaniclastic and clastic sedimentary rock.  Ore bodies are controlled by linear zones of fissuring and deformation that trend both northwest and northeast.  Majority of the veins occur domed anticlines.  Two productive mineral assemblages:  (1) a deeper assemblage with microcrystalline quartz, ankerite, sericite, pyrite, arsenopyrite, sphalerite, galena, bournonite, tetrahedrite-tennantite, and gold; and  (2) an upper assemblage marked by finely crystalline crustified quartz, pyrite, stibnite, and gold.  In quartz-cemented breccias, Ag dominates over Au.	Russia

R59-11	Elveney	R	59	11	68 20 19N	168 34 18E	68.3386111111111	168.571666666667	6820'N	16834'E	Au sulfide-disseminated	Au, As		Prospective medium-size deposit with low-grade ores.	Eastern Asia-Arctic: Anuyi-Beringovsky	Rozenblum and Fadeev, 1990	Linear mineralized shear zones in Upper Triassic sandstone contain fine-grained, disseminated gold-arsenopyrite mineralization.  Tungsten veins and stockworks also occur in the vicinity of the deposit.	Russia

R59-12	Pelvuntykoinen	R	59	12	68 08 00N	168 51 00E	68.1333333333333	168.85	6808'N	16851'E	Granitoid-related Au	Au, Bi, Te		Small.  	Eastern Asia-Arctic: Anuyi-Beringovsky	Naiborodin, 1966	Quartz veins containing disseminated pyrite, arsenopyrite, native bismuth, tetradymite, and gold occur in Upper Triassic sedimentary rocks and Lower Cretaceous extrusive volcanic rocks adjacent to a granitic pluton.	Russia

R60-01	Dvoinoi	R	60	01	69 32 42N	176 02 02E	69.545	176.033888888889	6933'N	17602'E	Au quartz vein   	Au		No data.  	Chukotka	Piankov, written commun., 1981	Quartz, carbonate-quartz, and sulfide-quartz veins occur along silicified and sulfidized breccia zones.  Veins contain gold, pyrite, chalcopyrite, galena, sphalerite, cassiterite, ilmenite, and magnetite over an area about 30 km by 20 km.  Veins generally strike east-west.  Most of the ore bodies occur in Devonian sandstone and shale adjacent to the Early Cretaceous Velitekenai granitic pluton.  Veins and mineralized fracture zones are confined to structures radiating out from major faults which trend northwest.  Gold-bearing mineralized zones are 100 to 150 m wide and up 1 km long.  Sulfide content of the veins is less than 1-2% (sulfide poor).	Russia

R60-02	Ryveem	R	60	02	69 20 52N	178 18 30E	69.3477777777778	178.308333333333	6921'N	17819'E	Au quartz vein   	Au		Small occurrences.  Minor prospecting.  	Chukotka	Pole, written commun., 1977	Deposit consists of low-sulfide quartz-carbonate veins with disseminated pyrite, arsenopyrite, chalcopyrite, galena, sphalerite, and fine-grained gold in metamorphosed  mid-Paleozoic clastic sedimentary and carbonate rocks.  Ore bodies are 200-500 m long and range greatly in thickness.  Mineralized area is about 1700 km2, but the extent of mineralization is poorly known.	Russia

R60-03	Kukenei	R	60	03	69 07 48N	174 05 27E	69.13	174.090833333333	6908'N	17405'E	Sn polymetallic vein   	Sn, Ag	Cu, Pb	Large.  Considerable prospecting.  	Eastern Asia-Arctic: Chaun	Sidorov, 1966; Volkov and Dobrotin, 1990; Goncharov and others, 1990.	Tin ore bodies are associated with a Cretaceous epizonal granitic pluton exposed in the middle of an intrusive dome.  Host rock is mainly Upper Triassic sandstone with minor shale, intruded by granite porphyry and lamprophyre dikes.  Wall rocks are intensely sericitized, tourmalinized, chloritized, and pyritized.  Tin occurs mainly in veins, mineralized fractures, and northwest-trending broken zones.  Both cassiterite-quartz and cassiterite-sulfide mineral assemblages are present.  A cassiterite-sulfide association comprises up to 70-90% of the richest ore bodies and includes arsenopyrite, fine acicular cassiterite, pyrite, marcasite, sphalerite, chalcopyrite, stannite, galena, gold, and sulfosalts of Pb and Ag.  Silver occurs as argentite, and also as native metal and as inclusions in most of the sulfides.  Near the intrusion, Sn-Ag mineralization changes to predominantly tin mineralization.  Sn ore zones coincide with disseminated gold-sulfide minerals.  Last stage of mineralization is marked by a stibnite-quartz assemblage.	Russia

R60-04	Sopka Rudnaya	R	60	04	68 58 12N	174 03 04E	68.97	174.051111111111	6858'N	17403'E	Au-Ag epithermal vein	Au, Ag	Sb, As	Small.  Grade ranges from 8 to 17 g/t Au and 26 to 510 g/t Ag.  	Eastern Asia-Arctic: Anuyi-Beringovsky	Sidorov, 1966	Disseminated veinlets of adularia-hydromica-quartz composition contain kaolinite, dolomite and fine-grained, disseminated electrum, miargyrite, pyrargyrite, galena, sphalerite, chalcopyrite and argentite.  Chalcedony-quartz veins contain disseminated and intergrowths and aggregates of arsenopyrite, marcasite, stibnite, and rare gold.  Laminated and rhythmically-banded vein structures are typical.  Ore-bearing area is composed of Lower and Upper Cretaceous felsic volcanic rocks that overlie Upper Triassic sandstone and shale.  Volcanic rocks are broken by a set of northwest, and approximately east-west and north-south trending faults which are intruded by Late Cretaceous andesite-basalt hypabyssal plutons.  A vertical alteration pattern is reflected in a zone of argillization and kaolinite with lenses of stibnite, that is over-printed by gold-bearing, quartz-adularia-hydromica zones and ore-bearing zones of low-temperature propylitization.	Russia

R60-05	Lunnoe	R	60	05	68 48 39N	174 49 18E	68.8108333333333	174.821666666667	6849'N	17449'E	Sn silicate-sulfide vein   	Sn, W	As, Zn	Medium.  	Eastern Asia-Arctic: Chaun	Lugov, 1986	Tin-bearing stockworks, mineralized zones, and veins occur in Middle and Upper Triassic, tourmalinized, silicified, sulfidized, sericitized, and chloritized sandstone and siltstone that overlie a buried granitic intrusion.  Individual ore bodies, which are several hundred meters long, occur along fissures of diverse attitude.  Ore bodies are composed of quartz, albite, tourmaline, chlorite, sericite, muscovite, fluorite, pyrite, arsenopyrite, cassiterite, stannite, galena, sphalerite, chalcopyrite, pyrrhotite, wolframite, and other minerals.  Cassiterite-quartz ore bodies are the most important economically, but small amounts of wolframite, chlorite, muscovite, and tourmaline occur widely.	Russia

R60-06	Kuekvun	R	60	06	68 45 32N	178 52 39E	68.7588888888889	178.8775	6846'N	17853'E	Granitoid-related Au  	Au, Bi, Te, Sn, W		Small.  	Eastern Asia-Arctic: Chaun	Gorodinsky, Gulevich, and Nailborodin, written commun., 1977	Scattered quartz veins, 0.2 to 2.5 m thick and 100 to 800 m long, occur in Triassic gabbro and diabase which intrude carboniferous schist and Triassic shale; adjacent to an intermediate granitic intrusion.  Veins contain tourmaline, sericite, albite, carbonates, arsenopyrite, pyrite, pyrrhotite, chalcopyrite, galena, sphalerite, tetrahedrite, cassiterite, scheelite, native bismuth, and tellurides of bismuth, gold, and silver.	Russia

R60-07	Shurykan	R	60	07	68 44 13N	174 23 01E	68.7369444444444	174.383611111111	6844'N	17423'E	Porphyry Cu-Mo   	Mo, Cu		Small.  	Eastern Asia-Arctic: Chaun	Zhuravlev, written commun., 1981	Group of ore deposits that consist of stockworks of northeast-trending quartz, quartz-tourmaline, quartz-chlorite, and quartz-fluorite-calcite veinlets, with disseminated molybdenite, chalcopyrite, and pyrite.  Ore bodies occur in hydrothermally altered diorite, granodiorite porphyry, and dacite of the Shurykan hypabyssal intrusion that is cut by north-east trending mineralized fractures.  Fine-grained disseminated sulfides are also widespread in the quartz-sericite rocks adjacent to the pluton.	Russia

R60-08	Plamennoe	R	60	08	68 20 46N	177 11 44E	68.3461111111111	177.195555555556	6821'N	17712'E	Volcanic-hosted Hg  	Hg, Sb		Medium.  Produced 442 tonnes Hg from high grade ore.  	Eastern Asia-Arctic: Chukotka	Kopytin, 1972; Babkin, 1975	Conformable lenses and pods with cinnabar occur in brecciated, silicified, and sericitized rhyolite which forms a number of extrusive domes along faults.  Main ore body is a sheet-like deposit about 40 m wide that extends northwest for about 180 m.  Rhyolitic ignimbrite forms the hanging wall and is commonly altered to a quartz-rich rock that obscures the deposits.  Ores are massive or in disseminated veinlets in areas of intense alteration.  Strong mineralization extends to a depth of at least 30 m, and some mercury ore bodies extend to 100 m in depth.  Cinnabar is associated with quartz, chalcedony, stibnite, pyrite, and marcasite.  Stibnite dominates locally.  Lower Cretaceous volcanic rocks form a dome about 4 by 5 km in size which is intruded by a Late Cretaceous diorite stock and comagmatic hypabyssal bodies and dikes of basalt, andesite, and diorite porphyry.  Ore zone about 4 km by 0.5-1 km, and is bounded by a system of steeply dipping faults trending northwest and east-west.	Russia

R60-09	Mramornoe	R	60	09	68 06 15N	176 29 59E	68.1041666666667	176.499722222222	6806'N	17630'E	Sn polymetallic vein   	Sn, Ag	As, Cu, Pb, Zn	Medium.  	Eastern Asia-Arctic: Chaun	Rozenblyum, oral commun., 1991	Deposit consists of mineralized zones and stockworks with quartz, chlorite, sericite, tourmaline, and sulfides; and quartz-chlorite veins with disseminated, crystalline, and colloform cassiterite and stannite.  Sulfide minerals include pyrite, marcasite, pyrrhotite, sphalerite, galena, chalcopyrite, and sparse arsenopyrite and chalcocite.  Silver-sulfide and tetrahedrite-tennantite is wide-spread.  Stibnite and cinnabar are present locally.  Cassiterite and stannite occur with wolframite, bismuthinite, bismuth, and molybdenite in the rich ores.  Ore occurrences are associated with a dome approximately 18 km in diameter composed mainly of Albian and Cenomanian ignimbrites and tuffs.  Zones of veins and veinlets are controlled by northeast trending faults, closely associated with Late Cretaceous granite porphyry dikes and stocks.  Ore bodies are up to 800 m long.	Russia

S54-01	Chokurdakh	S	54	01	72 13 43N	140 17 48E	72.2286111111111	140.296666666667	7214'N	14018'E	Sn silicate tourmaline, Sn silicate-sulfide vein	Sn		Average grade of 0.1-3.35% Sn; up to 3% As; up to 2% Cu; up to 1% Pb; up to 0.3% Zn.	Chokurdak	Sorokov and Voitsekhovsky, written commun., 1961; Prokhorova, Ivanov, 1973; Nekrasov and Pokrovsky, 1973.	Consists of shear zones that range up to 1,500 m long and up to 15-20 m thick that strike northeast and dip steeply.  Zones contain quartz-tourmaline breccias and veins with cassiterite (to 15%), arsenopyrite, chalcopyrite, pyrite, albite and sericite, siderite, and Ag sulfosalts.  Zones contain alternating stringers and breccia. Distances between zones range from a few to 200 m.  Deposit occupies 1.5 km2 area.  Zones associated with silica, sericite, and tourmaline alteration. Deposit hosted in Early Cretaceous sedimentary and in Early and Late Cretaceou volcanic rocks, granodiorite, diorite porphyry, and in granite-porphyry dikes.	Russia