| site                            | commodities, main  | quad-250 | quad-63360 | latitude | longitude | location                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         | commodities, other | ore minerals                                   | gangue minerals                       | site type  | site status | production | deposit model                                            | geologic description                                                                                                                                                                                         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| Indian Creek                    | Au                 | KN       | A-2        | 60.119   | 150.616   | Indian Creek drains into  Tustumena Lake in the NW1/4 of section 2, T. 1 S., R. 8 W., of the Seward Meridian.  This is Cobb's (1972, MF-377) location 6 and is accurate to within a quarter of a mile.                                                                                                                                                                                                                                                                                           |                    | Gold                                           |                                       | Mine       | Inactive    | Yes; small | Placer Au (Cox and Singer, 1986; model 39a)              | Small amounts of gold occur in stratified glacial-fluvial gravels at the mouth of Indian Creek canyon.  In 1903 an elaborate hydraulic plant was assembled at the site, but was not profitable to operate.  It was subsequently abandoned (Martin and other, 1915).                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             | Small-scale placer mining occurred for several years prior to 1903. In 1903 an elaborate hydraulic plant was assembled at the site, but was not profitable to operate and was abandoned (Martin and others, 1915).                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |                                                                           | Brooks, A.H., 1904, Placer mining in Alaska in 1903:  U.S. Geological Survey Bulletin 225, p. 43-59.��Cobb, E.H., 1973, Placer deposits of Alaska: U.S. Geological Survey Bulletin 1374, 213 p.��Cobb, E.H., 1979, Summary of references to mineral occurrences (other than minerals fuels and construction materials) in the Kenai and Tyonek Quadrangles, Alaska:  U.S. Geological Survey Open-File Report 80-86, 36 p.��MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska:  U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.��Martin G.C., Johnson, B.L., and Grant, U.S., 1915, Geology and mineral resources of Kenai Peninsula, Alaska:  U.S. Geological Survey Bulletin 587, 243 p.��Moffit, F.H., 1906, Gold fields of the Turnagain Arm region:  U.S. Geological Survey Bulletin 277, p. 7-52.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | KN001       | Jeff A. Huber (Anchorage) | 3/7/1999         | A010643     | Quaternary.                                                         |                      | 39a                  | None.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             | This propsect is within the Kenai National Wildlife Refuge; the area is now closed to mineral entry. |                                                                                                                                                                                                                                                       | Martin and others, 1915 |
| Johnson; Johnson River          | Au, Cu, Pb, Zn     | KN       | A-8        | 60.121   | 152.954   | The Johnson River prospect is located at an elevation of 1,500 feet on the northwest side of Hill 3050 overlooking the mouth of the Johnson Glacier, it is in the NW1/4 of section 6, T. 1 S., R. 21 W., of the Seward Meridian.  This location is accurate to within 300 feet.                                                                                                                                                                                                                  |                    | Chalcopyrite, galena, gold, pyrite, sphalerite | Anhydrite, barite, chlorite, sericite | Prospect   | Inactive    | None       | Kuroko massive sulfide (Cox and Singer, 1986; model 28a) | The Johnson River prospect occurs within the lower Jurassic Talkeetna Formation, an approximately  2,575 meter thick sequence of volcanic and volcaniclastic rocks (Determan and Hartsock, 1966).  The volcanic section near the prospect is structurally bounded on the west by the Bruin Bay Fault, a major fault system traceable for over 500 kilometers.  On the east, the  volcanics are unconformably overlain by upper Jurassic marine sediments (Determan and Hartsock, 1965).  The Talkeetna Formation is intruded by rocks of the Aleutian range -Talkeetna Mountain plutonic belt approximately 23 km. southwest of the prospect.  These intrusives which consist dominantly of coarse-grained quartz diorites and quartz monzonites have been dated between 175 and 145 m.y. (Steefel, 1987).  �   At  the Johnson River Prospect, the Talkeetna Formation has been divided into three major groups (Steefel, 1987).  The lowest group consist of purple and green andesite flows and breccia which locally show well-developed pillows.  The middle group that host the mineralization, consists of coarse-grain felsic breccias, reworked volcaniclastic rocks, crystal tuffs, and dacite flows.  The upper group consists of polymitic andesitic breccias and conglomerates with minor andesitic flows.  Informally, the middle group has been named the Johnson unit (Steefel, 1987).  Numerous structures within the unit including turbidites and reverse graded bedding indicate a subaqueous origin.  �   The mineralization and alteration at Johnson River can be subdivided into two stages which are mineralogically, chemically, and temporally distinct.  Stage one is an early stage of nodular anhydrite and pyrite accompanied by magnesisum-chlorite, sericite, montmorillonite, and calcite.  This stage is either geochemically barren or weakly anomalous in base metals and gold. (Steefel, 1987).  Stage two which includes all the high-grade mineralization consists of quartz-sulfide mineralization accompanied by iron-chlorite, sericite, barite, carbonate, and vein-type anhydrite.  Sulfide mineralization consists of early pale-colored sphalerite, later dark sphalerite, galena, chalcopyrite, pyrite, and native gold.  The highest grade gold concentration is associated with chalcopyrite (Steefel, 1987).  Overall the stage two, quartz-sulfide mineralization occurs in a fractured controlled, steeply plunging, pipe-like stockwork zone that measures 160 meters long by 50 meters wide and extends to a depth of at least 250 meters (Bill Ellis,  personal communcation,1999).     | The deposit was discovered in 1975 by RAA as part of a regional exploration  program.  Anaconda Minerals acquired the prospect in 1981, and did detailed mapping, geophysics, geochemistry, and drilled 44 core drill holes (Bill Ellis, personal communcation, 1999).  This work defined a 160 meter long by 50 meters wide and 250 meters deep fault bounded, quartz-sulfide orebody.  Additional drilling was done by Howard Keck in 1990 and 1991. As of 1997, the prospect contained a drilled out reserve (at $50.00 per ton cutoff) of 1,099,580 tons that contain 0.32 ounces of gold per ton, 0.24 ounces of silver per ton, 0.76% copper, 1.17% lead and 8.73% zinc (Swainbank and others, 1997). | This prospect is owned by Cook Region Native Association.                 | Detterman, R.L., and Hartsock, J.K., 1966, Geology of the Iniskin-Tuxedni region, Alaska: U.S. Geological Survey Professional Paper 512, 78 p.��Detterman, R.L., Reed, B.L., and Lamphere, M.A., 1965, Jurassic plutonism in the Cook Inlet region, Alaska:  U.S. Geological Survey Professional Paper 525-D, p. D16-D21.��Nokleberg, W.J., Bundtzen, T.K., Berg, H.C., Brew, D.A., Grybeck, D.J., Robinson, M.S., Smith, T.E., and Yeend, W., 1987, Significant metalliferous lode deposits and placer districts of Alaska: U.S. Geological Survey Bulletin 1786, 104 p., 2 plates, scale 1:5,000,000.��Steefel, C.I., 1987, The Johnson River prospect, Alaska; Gold rich sea-floor mineralization from the Jurassic:  Economic Geology, Vv. 82, p. 894-914. ��Swainbank, R.C., Bundtzen, T. K., Clough A.H., and Henning, M.W., 1997, Alaska's mineral industry 1996:  Alaska Division of Geological and Geophysical Surveys Special Report 51, 68 p.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | KN002       | Jeff A. Huber (Anchorage) | 4/15/1999        |             | Early Jurassic.                                                     |                      | 28a                  | The alteration at Johnson River can be divide into two main events. An early stage of nodular anhydrite and fine-grained disseminated pyrite is accompanied by Mg-chlorite, sericite, monmorillonite and or calcite.  This alteration is either barren or weakly anomalous in base metal mineralization.  The later alteration consists of silicification and sulfidation accompanied by iron-chlorite, sericite, barite, carbonate, and vein anhydrite.  This stage alteration includes all the mineralization at Johnson River (Steefel, 1987). |                                                                                                      | As of 1997, the prospect contained a drilled out reserve at ($50.00 per ton cutoff ) of 1,099,580 tons that contain 0.32 ounces of gold per ton, 0.24 ounces of silver per ton, 0.76% copper, 1.17% lead and 8.73% zinc (Swainbank and others, 1997). | Steefel, 1987           |
| Trachsel; Snug Harbor           | Fe                 | KN       | A-8        | 60.246   | 152.851   | Magnetic Island is at the mouth of Tuxedni River, which is on the west side of Cook Inlet, due west of Ninilchik.  The island can be accessed by small boat or seaplane. However, the trip should only be attempted at high tide and under favorable weather conditions since most of Tuxedni Bay is dry at low tide.  There are two magnetite occurrences on the island, one on the east and one on the west side. This is Cobb's (1972, MF-377) location 1 and is accurate to within 300 feet. |                    | Magnetite                                      | Garnet, pyroxene                      | Occurrence | Inactive    | No         | Fe skarn (Cox and Singer, 1986; model 18d)               | Magnetite Island consists of metamorphosed volcanic rocks of Early Jurassic Talkeetna Formation and an Upper Triassic marble that has been subjected to contact metamorphism by Jurassic quartz diorite associated with the Alaska-Aleution Range batholith (Grantz, 1956).  There are two magnetite occurrences on the island.  The western occurrence consists of a single lens of magnetite garnet skarn.  The skarn appears to be about 35 feet wide and is exposed for about 55 feet along strike.  A reconnaissance dip -needle traverse indicated the total strike length of the body is about 110 feet.  This exposed skarn strikes N40E and dips 40SE.  The hanging wall of the skarn is a white medium grain marble of Upper Triassic age which has been recrystallized by contact metamorphism.  The foot wall of this occurrence is hornfelsed siltstone and volcanic rock of  the Talkeetna  Formation.  The contact between the marble and the hornfels is unclear but it may be a fault (Grantz, 1956). �   The eastern occurrence consists of magnetite disseminated in hornfels, probably derived from volcanic rocks.  The magnetite occurs in two parallel zones.  The upper zone is about 30 feet thick and is separated from the lower zone by 20 feet of hornfelsed volcanics.  The lower zone is at least 10 feet thick but its base is not exposed.  The mineralized zones strike approximately N35 to 45E and dip 45SE.  The magnetite in the eastern zone is disseminated in a matrix of garnet, diopside, chlorite, and plagioclase.  No zoning of the skarn minerals are reported.  An assay from the upper zone contained 25.8% iron and 0.01% sulfur. However, about one-fifth of the iron may occur in silicate minerals (Grantz, 1956).                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         | Small excavation in sea cave at the western deposit contains 25% to 50% iron.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |                                                                           | Berg, H.C., and Cobb, E.H., 1967, Metalliferous lode deposits of Alaska:  U.S. Geological Survey Bulletin 1246,  254 p.��Brooks, A.H., 1921, The future of Alaska mining, in Martin, G.C., and others, Mineral resources of Alaska, 1917:  U.S. Geological Survey Bulletin 714-A, p. 5-57.��Cobb, E.H., 1972, Metallic mineral resources map of the Kenai quadrangle, Alaska:  U.S. Geological Survey Miscellaneous Field Studies Map MF-377, 1 sheet, scale 1:150,000.��Cobb, E.H., 1979, Summary of references to mineral occurrences (other than minerals fuels and construction materials) in the Kenai and Tyonek Quadrangles, Alaska:  U.S. Geological Survey Open-File Report 80-86, 36 p.��Detterman, R.L., and Hartsock, J.K., 1966, Geology of the Iniskin-Tuxedni region, Alaska: U.S. Geological Survey Professional Paper 512, 78 p.��Grantz, Arthur, 1956, Magnetite deposits at Tuxedni Bay, Alaska: U.S. Geological Survey Bulletin 1024-D, p. 95-106. ��MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska:  U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.��Martin, G.C., 1920, The Alaska mining industry in 1918:  U.S. Geological Survey Bulletin 712-A, p. 1-52. ��Moffit, F.H., 1927, The Iniskin-Chinitna Peninsula and Snug Harbor district, Alaska:  U.S. Geological Survey Bulletin 789, 71 p.                                 | KN003       | Jeff A. Huber (Anchorage) | 3/1/1999         | A010644     | Jurassic; hornfels related to Intrusion of Jurassic quartz diorite. |                      | 18d                  | Hornfels and metasomatic alteration are present in this occurrence.                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |                                                                                                      | Up to several thousand tons in zones with 20 to 75% magnetite  (Grantz, 1956).                                                                                                                                                                        | Grantz, 1956            |
| Nikiska #1                      | Diatomaceous earth | KN       | C-4        | 60.689   | 151.393   | Numerous small occurrences are found near Cabin Lake, Nikiski Wharf and Salamatof Village.  The main deposit and the only site identified as being of sufficient extent and purity to warrant possible economic interest is located 10 1/2 miles north of Kenai, Alaska within section 21, T. 7 N.,  R. 12 W., of the Seward Meridian.  This location is accurate to a quarter of a mile.                                                                                                        |                    |                                                |                                       | Prospect   | Inactive    | No         | Diatomaceous earth above lake sediments                  | The entire northwest Kenai Peninsula  is underlain by glacial outwash sediments which were deposited between 8,000 to 14,000 years ago (Pewe and others, 1953).  Overlying the outwash sediments, locally there are up to 13 feet of older lake sediments consisting of layered silts and clays.  The diatomaceous earth deposits locally overlie the lake sediments and range from less than 2 feet to over 12 feet thick.  When wet, diatomaceous earth is a mottled brown to green color with a jelly-like consistency.  In contrast, the dried material is massive, very light weight, chalk white to buff color, and friable. Dried samples contained by weight 65 to 75 percent recent fresh-water diatoms. The most common forms identified were Stephanodiscus, Melosira, and Cybella.  The remainder of the diatomaceous earth is composed of 13 percent organic matter and between 10 to 20 percent wind deposited silts and clays (Plakfer, 1956).                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | Twenty-five auger-core samples were taken in 1952. The samples contained 65 to 75 percent (by weight) of dry diatomaceous earth (Plafker, 1956).                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |                                                                           | Cobb, E.H., 1979, Summary of references to mineral occurrences (other than minerals fuels and construction materials) in the Kenai and Tyonek Quadrangles, Alaska:  U.S. Geological Survey Open-File Report 80-86, 36 p.��Plafker, George, 1956, Occurrence of diatomaceous earth near Kenai, Alaska:  U.S. Geological Survey Bulletin 1039-B, p. 25-31.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | KN004       | Jeff A. Huber (Anchorage) | 3/3/1999         | A010642     | Recent.                                                             |                      |                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |                                                                                                      | The deposit contains 210,000 cubic yards of material containing about 70,000 tons of diatomaceous earth (Plafker, 1956).                                                                                                                              | Plafker, 1956           |
| Unnamed (along the Kenai River) | Au                 | KN       | B-1        | 60.461   | 150.145   | The occurrence is about two miles north of the head of Skilak Lake, on the north bank of the Kenai River in the SE1/4 of section 4, T. 4 N., R. 5 W., of the Seward Meridian.  This is Cobb's (1972, MF-377) location 2 and is accurate to within a quarter of a mile.                                                                                                                                                                                                                           |                    | Gold                                           |                                       | Occurrence | Inactive    | Yes; small | Placer Au (Cox and Singer, 1986; model 39a)              | The bedrock is the Cretaceous Valdez Group metasediments (MacKevett and Holloway, 1977).  Small quantities of gold have been recovered from the upper part of glacial-fluvial gravel benches along the banks of the Kenai River (Martin and others, 1915).  Gold from the Kenai River valley is very fine, light, and flaky, and has a value of about $17.58 per ounce (with gold at $20.67 per ounce)(Martin and others, 1915, p.199).                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         | Some placer mining was done at turn of century; and the river was dredged between 1903 and 1915.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | This site is within a wilderness area and is now closed to mineral entry. | Cobb, E.H., 1972, Metallic mineral resources map of the Kenai quadrangle, Alaska:  U.S. Geological Survey Miscellaneous Field Studies Map MF-377, 1 sheet, scale 1:150,000.��Cobb, E.H., 1979, Summary of references to mineral occurrences (other than minerals fuels and construction materials) in the Kenai and Tyonek Quadrangles, Alaska:  U.S. Geological Survey Open-File Report 80-86, 36 p.��MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska:  U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.��Martin G.C., Johnson, B.L., and Grant, U.S., 1915, Geology and mineral resources of Kenai Peninsula, Alaska:  U.S. Geological Survey Bulletin 587, 243 p.��Moffit, F.H., 1906, Gold fields of the Turnagain Arm region:  U.S. Geological Survey Bulletin 277, p. 7-52.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | KN005       | Jeff A. Huber (Anchorage) | 2/25/1999        | A010641     | Quaternary.                                                         |                      | 39a                  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |                                                                                                      |                                                                                                                                                                                                                                                       | Cobb, 1979              |
| Ninilchik                       | Au                 | KN       | A-5        | 60.12    | 151.56    | Cobb (1972, MF-377) located this occurrence on the shores of Cook Inlet about six miles northeast of the town of Ninilchik.  However, small amounts of gold are probably present in small amounts along the entire beach at this vicinity.  This is Cobb's (1972, MF-377) location 5 and is accurate to within a half a mile.                                                                                                                                                                    |                    | Gold                                           |                                       | Occurrence | Inactive    | Yes; small | Beach placer Au (Cox and Singer, 1986; model 39a)        | Gold has been found along the shoreline in a thin gravel layer about 2 feet below the surface.  The area was mined intermittently from 1889 to 1911, mostly by rocker and small sluice boxes. The gold is probably derived from the Kenai Formation; the lode source was far to the east  (Martin and others, 1915).                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | Beach mining was reported in the summer of 1911 but the results are not known (Martin and others, 1915).  No commercial production has ever been reported from this area.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |                                                                           | Cobb, E.H., 1972, Metallic mineral resources map of the Kenai quadrangle, Alaska:  U.S. Geological Survey Miscellaneous Field Studies Map MF-377, 1 sheet, scale 1:150,000.��Cobb, E.H., 1973, Placer deposits of Alaska: U.S. Geological Survey Bulletin 1374, 213 p.��Cobb, E.H., 1979, Summary of references to mineral occurrences (other than minerals fuels and construction materials) in the Kenai and Tyonek Quadrangles, Alaska:  U.S. Geological Survey Open-File Report 80-86, 36 p.��MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska:  U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.��Martin G.C., Johnson, B.L., and Grant, U.S., 1915, Geology and mineral resources of Kenai Peninsula, Alaska:  U.S. Geological Survey Bulletin 587, 243 p.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | KN006       | Jeff A. Huber (Anchorage) | 3/4/1999         | 10307710    | Recent.                                                             |                      | 39a                  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |                                                                                                      |                                                                                                                                                                                                                                                       | Martin and others, 1915 |
| Double Glacier                  | Au, Cu, Zn         | KN       | A-8        | 60.093   | 152.976   | This occurrence is located near the mouth of Double Glacier in section 13, T. 1 S., R. 22 W., of the Seward Meridian.  The occurrence is at an elevation of about 1,000 feet.                                                                                                                                                                                                                                                                                                                    |                    | Gold, pyrite, sphalerite                       | Barite, calcite, gypsum, quartz       | Occurrence | Inactive    | None       | Kuroko massive sulfide (Cox and Singer, 1986; model 28a) | The Double Glacier occurrence is within the lower Jurassic Talkeetna Formation, an approximately 2,575 meter thick sequence of volcanic and volcaniclastic rocks (Determan and Hartsock, 1966).  The volcanic section near the prospect is structurally bounded on the west by the Bruin Bay Fault, a major fault system traceable for over 500 kilometers.  On the east, the  volcanics are unconformably overlain by upper Jurassic marine sediments (Determan and Hartsock, 1965).  The Talkeetna Formation is intruded by rocks of the Aleutian range -Talkeetna Mountain plutonic belt approximately 23 km. southwest of the prospect.   These intrusives which consist dominantly of coarse-grained quartz diorites and quartz monzonites have been dated between 175 and 145 m.y. ( Steefel, 1987).  �   At the Double Glacier occurrence, the Talkeetna Formation has been divided into three major groups (Steefel, 1987).  The lowest group consist of purple and green andesite flows and breccia which locally show well-developed pillows.  The middle group that host the mineralization, consists of coarse-grain felsic breccias, reworked volcaniclastic rocks, crystal tuff, and dacite flows.  The upper group consist of polymitic andesitic breccias and conglomerates with andesitic flows.  Informally, the middle group has been named the Johnson unit (Steefel, 1987).  Numerous structures within the unit including turbidites and reverse graded bedding indicate a subaqueous origin.  �   The mineralization consists of strataform massive sulfide layers and lens which contain pyrite, chalcopyrite, and sphalerite. There are no published assay results for this occurrence William Ellis (personal communcation, 1999) speculates that this occurrence is an upper portion of a Kuroko type massive sulfide deposit.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       | The occurence was discovered by Anaconda Minerals in 1982 as part of an exploration program at the Johnson River prospect.  To date there has been detailed mapping, stream and soil geochemical surveys, and surface trenching and sampling.  No assay results are avaible.                                                                                                                                                                                                                                                                                                                                                                                                                                | This occurrence is owned by Cook Region Native Association.               | Steefel, C.I., 1987, The Johnson River prospect, Alaska; Gold rich sea-floor mineralization from the Jurassic:  Economic Geology, Vv. 82, p. 894-914. ��Swainbank, R.C., Bundtzen, T. K., Clough A.H., and Henning, M.W., 1997, Alaska's mineral industry 1996:  Alaska Division of Geological and Geophysical Surveys Special Report 51, 68 p.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               | KN007       | Jeff A. Huber (Anchorage) |                  | 10307711    | Jurassic massive sulfide.                                           |                      | 28a                  | The Double Glacier occurence has alteration characteristics of a Kuroko type massive sulfide deposit that include sulfate alteration and silification.                                                                                                                                                                                                                                                                                                                                                                                            |                                                                                                      |                                                                                                                                                                                                                                                       |                         |
| Difficult Creek                 | Au, Cu, Zn         | KN       | A-8        | 60.151   | 152.875   | The occurrence located on a small ridge at an elevation of 1,850 feet overlooking Difficult Creek , it is in NE1/4 of section 26, T. 1 N., R. 20 W., of the Seward Meridian.  Difficult Creek drains into Tuxedni Bay which is on the west side of Cook Inlet.  This location is accurate to within 300 feet.                                                                                                                                                                                    |                    | Chalcopyrite, gold, pyrite, sphalerite         | Anhydrite, barite, calcite, quartz    | Occurrence | Inactive    | None       | Kuroko massive sulfide (Cox and Singer, 1986; model 28a) | The Difficult Creek  occurrence is within the lower Jurassic Talkeetna Formation, an approximately 2,575 meter thick sequence of volcanic and volcaniclastic rocks (Determan and Hartsock, 1966).  The volcanic section near the prospect is structurally bounded on the west by the Bruin Bay Fault, a major fault system traceable for over 500 kilometers.  On the east, the  volcanics are unconformably overlain by upper Jurassic marine sediments (Determan and Hartsock, 1965).  The Talkeetna Formation is intruded by rocks of the Aleutian range -Talkeetna Mountain plutonic belt approximately 23 km southwest of the prospect.  These intrusives which consist dominantly of coarse-grained quartz diorites and quartz monzonites have been dated between 175 and 145 m.y. ( Steefel, 1987). �   At  Difficult Creek, the Talkeetna Formation has been divided into three major groups (Steefel, 1987).  The lowest group consist of purple and green andesite flows and breccia which locally show well-developed pillows.  The middle group that host the mineralization, consists of coarse-grain felsic breccias, reworked volcaniclastic rocks, crystal tuffs, and dacite flows.  The upper group consists of  polymitic andesitic breccias and conglomerates with minor amounts of andesitic flows.  �   The mineralization consists of strataform massive sulfides layers and lens which contain pyrite, chalcopyrite and sphalerite. There are no published assay results for this occurrence.  William Ellis (personal communication, 1999) speculates that this occurrence is a Kuroko type massive sulfide deposit.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | The occurrence was discovered by Anaconda Minerals in 1982 as part of a exploration program at the Johnson River prospect.  To date there has been detailed mapping, stream and soil geochemical surveys, and surface trenching and sampling.  No assay results are available.                                                                                                                                                                                                                                                                                                                                                                                                                              | This occurrence is owned by Cook Region Native Association.               | Detterman, R.L., and Hartsock, J.K., 1966, Geology of the Iniskin-Tuxedni region, Alaska: U.S. Geological Survey Professional Paper 512, 78 p.��Detterman, R.L., Reed, B.L., and Lamphere, M.A., 1965, Jurassic plutonism in the Cook Inlet region, Alaska:  U.S. Geological Survey Professional Paper 525-D, p. D16-D21. ��Steefel, C.I., 1987, The Johnson River prospect, Alaska; Gold rich sea-floor mineralization from the Jurassic:  Economic Geology, Vv. 82, p. 894-914. ��Swainbank, R.C., Bundtzen, T. K., Clough A.H., and Henning, M.W., 1997, Alaska's mineral industry 1996:  Alaska Division of Geological and Geophysical Surveys Special Report 51, 68 p.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | KN008       | Jeff A. Huber (Anchorage) | 4/15/1999        | 10307712    | Jurassic massive sulfide.                                           |                      | 28a                  | The Difficult Creek  occurrence has alteration characteristics of a Kuroko type massive sulfide deposit that includes sulfate alteration, and silification.                                                                                                                                                                                                                                                                                                                                                                                       |                                                                                                      |                                                                                                                                                                                                                                                       |                         |