Nabesna quadrangle

Descriptions of the mineral occurrences shown on the accompanying figure follow. 

See U.S. Geological Survey (1996) for a description of the information content of each field 

in the records. The data presented here are maintained as part of a statewide database 

on mines, prospects and mineral occurrences throughout Alaska.

Distribution of mineral occurrences in the Nabesna 

1:250,000-scale quadrangle, eastern Alaska

This and related reports are accessible through the USGS World Wide Web site 

http://www-mrs-ak.wr.usgs.gov/ardf. Comments or information regarding corrections or 

missing data, or requests for digital retrievals should be directed to Frederic H. Wilson, 

USGS, 4200 University Dr., Anchorage, AK 99508-4667, email fwilson@usgs.gov, telephone (907) 786-7448. This compilation is authored by:

Donald Richter 

U.S. Geological Survey 

4200 University Drive 

Anchorage, AK 99508-4667

Location cl map area in Alaska

report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with the North American Stratigraphic code. Any use 

of trade, product, or firm names is for descriptive purposes only and does not imply 

endorsement by the U.S. Government.

OPEN-FILE REPORT 97-749
Alaska Resource Data File NB001

Site name(s): Slope Creek

Site type: Mine 

ARDFno.: NB001 

Latitude: 62.789 

Longitude: 143.994

Quadrangle: NB D-6

Location description and accuracy:

Best location: Richter, 1966, ADGGS GR 21, fig.5, loc. 11; Tributary to Porcupine Creek 

a tributary to Slana River. Accurate within 500 ft radius

Commodities: 

Main: Au 

Other: Ag, Cu, Bi

Ore minerals: Gold, silver, (copper, unknown Bi mineral) 

Gangue minerals: In concentrates: magnetite, ilmenite, pyrite

Geologic description:

No data on size or grade of deposit, but it was probably very small; placer deposits probably associated with mafic diorite-quartz diorite complex

Alteration:

Age of mineralization:

Deposit model:

Placer

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: Yes; small 

Site Status: Inactive

Workings/exploration:

Type of workings: surface

Production notes:

Page 2
Alaska Resource Data File NB001

Reserves:

Additional comments:

Some confusion exists in the literature in distinguishing between Slope Cr. and Boulder 

Cr. It is likely that most data probably refers to both. The mine symbol for Boulder Cr. 

on fig. 5 of ADGGS GR 21 is in the Gulkana quad.

References:

Moffit, 1938, USGS B 904, p. 50-51; Moffit, 1944, USGS B 943-B, p. 43-44; Moffit, 

1954, USGS B 989-D, p. 195; Richter and Matson, 1968, USGS Circ. 593, p. 2-3; Richter, 1964, ADGGS GR 6, p. 10; Richter, 1966, ADGGS GR 21, p. 28, 34, loc. 11; Cobb, 

1973, USGS B 1374, p. 29; Richter and others, 1975, USGS MF-655K, loc. 58

Primary reference: Moffit, 1944, USGS B 943-B 

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H. 

Last report date: 2/6/97

Page 3
Alaska Resource Data File NB002

Site name(s): Indian Pass Lake

Site type: Occurrence 

ARDFno.: NB002 

Latitude: 62.803 

Longitude: 143.982

Quadrangle: NB D-6

Location description and accuracy:

Best location: Richter and others, 1975, USGS MF-655-K, loc. 1. Accurate within 1000 ft 

radius.

Commodities:

Main: Au

Other:

Ore minerals: Pyrite? 

Gangue minerals: Quartz

Geologic description:

Disseminated pyrite and small quartz-pyrite veins in small hornblende diorite stock of Jurassic/Triassic age in an area of anomalous gold and copper in stream sediments

Alteration:

Age of mineralization:

Deposit model:

Lode: disseminated, vein

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Sample of hornblende diorite containing disseminated pyrite contained 0.3 ppm Au 

(sample R60, USGS Circ. 593, p. 11). Type of workings: surface

Page 4
Alaska Resource Data File NB002

Production notes: 

Reserves:

Additional comments:

More detailed sampling in the Slana area may reveal low grade lodes in the diorite complex with grades of at least 0.01 oz/ton Au

References:

Richter and Matson, 1968, USGS Circ. 593, p. 3-4, 11; Richter and others, 1975, USGS 

MF-655-K, loc.l.

Primary reference:

Reporter(s): Leonard, K.R.; Elliott, R.L.: Richter, D.H.

Last report date: 2/4/97

Page 5
Alaska Resource Data File NB003

Site name(s): Ahtell Cr 

Site type: Prospect 

ARDFno.: NB003 

Latitude: 62.733 

Longitude: 143.967

Quadrangle: NB C-6

Location description and accuracy:

Best location: Richter, 1966, ADGGS GR21, Fig. 5: mine symbol on lower Ahtell Cr 

with no number; 2 miles above confluence with Slana River. Accurate within radius of 

1000 ft

Commodities:

Main: Au

Other:

Ore minerals: Gold 

Gangue minerals:

Geologic description:

Auriferous gravel at lower end of canyon. Only small amount of gravel present

Alteration:

Age of mineralization:

Deposit model:

Placer

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: Undet. 

Site Status: Inactive

Workings/exploration:

Type of workings: surface

Production notes:

Page 6
Alaska Resource Data File NB003

Reserves:

Additional comments:

Total production probably very small. Also evidence of placer operation on Willow 

Creek, tributary to Ahtell Creek.

References:

Mendenhall and Schrader, 1903, USGS PP 15, p. 47; Moffit, 1938, USGS B 904, p. 48; 

Smith, 1941, USGS B 926-A, p.34; Richter, 1966, ADGGS GR21, p.34

Primary reference:

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H.

Last report date: 1/28/97

Page?
Alaska Resource Data File NB004

Site name(s): Corky (aka. Roseie, Ram's Horn, Verde) 

Site type: Occurrence 

ARDFno.: NB004

Latitude: 62.95 Quadrangle: NB D-6

Longitude: 143.7

Location description and accuracy:

Commodities:

Main: Asbestos

Other:

Ore minerals: 

Gangue minerals: 

Geologic description: 

Alteration: 

Age of mineralization:

Deposit model:

serpentine-hosted asbestos

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

8d

Production Status: 

Site Status:

Workings/exploration: 

Production notes: 

Reserves: 

Additional comments:

PageS
Alaska Resource Data File NB004

Data from Alaska Cardex files, Fairbanks, AK. Insufficient data to accurately locate deposit.

References:

Primary reference: MILS #0020780090

Reporter(s): D. Singer

Last report date: 7/18/96

Page 9
Alaska Resource Data File NB005

Site name(s): Patten 

Site type: Prospect 

ARDFno.: NB005 

Latitude: 62.932 

Longitude: 143.642

Quadrangle: NB D-6

Location description and accuracy:

Best location: Richter, 1967, ADGGS GR30, Plate 2, loc. 7. Accurate within 100 ft radius

Commodities:

Main: Gem (jade)

Other:

Ore minerals: Nephrite 

Gangue minerals: Tremolite, serpentine, chlorite

Geologic description:

Nephrite associated with tremolite in 100 to 200 ft wide band of alpine-type ultramafic 

complex consisting of serpentine-chlorite schist and massive serpentinite containing 

abundant rodingite inclusions. Site is near Mentasta Pass just north of Denali fault.

Alteration:

Age of mineralization:

Deposit model:

lode, metamorphic

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: Undet. 

Site Status: Inactive

Workings/exploration:

Type of workings: surface

Page 10
Alaska Resource Data File NB005

Production notes: 

Reserves:

Additional comments:

Deposit has yielded a number of pounds of semiprecious stone over the past 10 years 

(USGS MF-655K). Other deposits of jade in the ultramafic rocks of the quadrangle appear likely.

References:

Richter, 1967, ADGGS GR30, p. 5, 14, 18-19, 24 (loc. 7); Richter and others, 1975, 

USGS MF-655K, loc. 2.

Primary reference: Richter, 1967, ADGGS GR30 

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H. 

Last report date: 2/5/97

Page 11
Alaska Resource Data File NB006

Site name(s): Unnamed

Site type: Occurrence 

ARDFno.: NB006 

Latitude: 62.886 

Longitude: 143.656

Quadrangle: NB D-6

Location description and accuracy:

Best location: Richter, 1967, ADGGS GR-30, loc. 3, fig. 2. 0.7 mi SE of Mentasta Lodge 

on the Glenn Hwy. Accurate within 100 ft radius.

Commodities:

Main: Cu, Ag

Other:

Ore minerals: Bornite, chalcopyrite ? 

Gangue minerals: Calcite, epidote

Geologic description:

Bornite and minor chalcopyrite in vesicle fillings and irregular segregations disseminated 

in 400 ft zone in epidotized basalt flows of the Triassic Nikolai Greenstone.

Alteration:

Age of mineralization:

Deposit model:

Lode: volcanogenic

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Grab sample of bornite-bearing epidotized basalt assayed: 0.02 Oz/ton Au, 0.02 oz/ton 

Ag, 1.1% Cu, (ADGGS GR30, P. 17). Type of workings: none

Page 12
Alaska Resource Data File NB006

Production notes: 

Reserves: 

Additional comments:

References:

Richter, 1967, ADGGS GR 30, p. 17-18, 23, loc. 3; Richter and others, 1975, USGS MF655K, loc. 3

Primary reference: Richter, 1967, ADGGS GR 30 

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H. 

Last report date: 2/10/97

Page 13
Alaska Resource Data File NB007

Site name(s): Unnamed 

Site type: Occurrence 

ARDFno.: NB007 

Latitude: 62.867 

Longitude: 143.525

Quadrangle: NB D-6

Location description and accuracy:

Best location: Richter and others, 1975, USGS MF-655K, loc. 4. Accurate within 500 ft 

radius

Commodities:

Main: Cu

Other:

Ore minerals: Malachite, azurite 

Gangue minerals:

Geologic description:

Zone of strong malachite and azurite stain in amygdaloidal basalt flows of Triassic Nikolai Greenstone

Alteration:

Age of mineralization:

Deposit model:

Lode: volcanogenic

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Type of workings: surface

Production notes:

Page 14
Alaska Resource Data File NB007

Reserves:

Additional comments:

See other volcanogenic deposits in Nikolai Greenstone: (NB033, 054, 055).

References:

Richter and others, 1975, USGS MF-655K, loc. 4

Primary reference: Richter and others, 1975, USGS MF-655K 

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H. 

Last report date: 2/6/97

Page 15
Alaska Resource Data File NB008

Site name(s): Unnamed 

Site type: Prospect 

ARDFno.: NB008 

Latitude: 62.6233 

Longitude: 143.449

Quadrangle: NB C-5

Location description and accuracy:

Best location: Richter and Schmoll, 1973, USGS GQ 1062 loc. 1. Accurate within 100 ft 

radius

Commodities:

Main: Au, Pb, Zn

Other:

Ore minerals: Gold, galena, sphalerite 

Gangue minerals: Quartz, calcite, pyrite

Geologic description:

Stringers, 1/4 to 2 in thick, of quartz, calcite, pyrite, galena, and sphalerite in a zone 6 to 

12 in wide cutting hornfelsed and dioritized volcanics of Pennsylvanian-Permian age. 

Deposit is in diorite gneiss which is cut by 8 ft thick trachyte dike that strikes N 55 W and 

dips 45 NE.

Alteration:

Age of mineralization:

Deposit model:

Lode: vein

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: Undet. 

Site Status: Inactive

Workings/exploration:

Adit driven N 65 E to crosscut vein, caved by early 1950,s (USGS B 989-D); tenor not

Page 16
Alaska Resource Data File NB008

known. Type of workings: underground 

Production notes: 

Reserves: 

Additional comments:

References:

Moffit, 1954, USGS B 989-D, p. 203; Berg and Cobb, 1967, USGS B 1246, p. 47; Matson and Richter, 1971, USGS OF 473, p. 10; Richter and Schmoll, 1973, USGS GQ1062, loc. 1; Richter and others, 1975, USGS MF-655K, loc. 5

Primary reference: Moffit, 1954, USGS B 989-D 

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H. 

Last report date: 2/6/97

Page 17
Alaska Resource Data File NB009

Site name(s): Rock Creek Molybdenum

Site type: Prospect 

ARDFno.: NB009

Latitude: 62.5981 

Longitude: 143.357

Quadrangle: NB C-5

Location description and accuracy:

Best location: Richter and Schmoll, 1973, USGS GQ-1062, loc. 4. Accurate within 100 ft 

radius

Commodities:

Main: Mo

Other:

Ore minerals: Molybdenite 

Gangue minerals: Quartz, feldspar, biotite, hornblende

Geologic description:

Books of molybdenite up to 1.5 in in diameter in alkali pegmatite dike; dike ranges from a 

few in to 2 ft in width and can be traced for 70 ft on surface; dike strikes N 20 W and dips 

60 SW; pegmatite dike cuts gneissic rocks of a Jurassic-Triassic diorite complex.

Alteration:

Age of mineralization:

Triassic?

Deposit model:

Lode: pegmatite

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Explored by open cuts and tunnel. Assays 4.6% Mo, average assay about 3% Mo (USGS

Page 18
Alaska Resource Data File NB009

B 910, p. 105); No visible Mo in workings in 1985; Type of workings: surface and underground

Production notes: 

Reserves:

Additional comments:

Minor Mo deposit; prospect inactive since late 1930's. See also: Rock Creek corundum 

prospect (NB010).

References:

Moffit, 1941, USGS B 917, p. 150-153; Moffit, 1954, USGS B 989-D, p. 190, 201, 209- 

210; Nelson and others, 1952, USGS Circ 348, p. 3; Richter, 1970, USGS PP 700-C, p. 

C98-C102; Matson and Richter, 1971, USGS OF 473, p. 10; Richter and Schmoll, 1973, 

USGS GQ-1062, loc. 4; Richter and others, 1975, USGS MF-655K, loc. 6.

Primary reference: Moffit, 1941, USGS B 917 

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H. 

Last report date: 2/5/97

Page 19
Alaska Resource Data File NB010

Site name(s): Rock Creek Corundum

Site type: Prospect 

ARDFno.: NB010 

Latitude: 62.5969 

Longitude: 143.348

Quadrangle: NB C-5

Location description and accuracy:

Best location: Richter and Schmoll, 1973, USGS GQ-1062, loc. 5. Accurate within 100 ft 

radius.

Commodities:

Main: Gem (sapphire)

Other:

Ore minerals: Corundum 

Gangue minerals: Orthoclase, microperthite, soda feldspar, muscovite

Geologic description:

Sporadic aggregates of corundum associated with books of muscovite in small, discontinuous alkali pegmatite dikes; dikes generally less than 3 ft wide; host rock for pegmatite 

dikes is peraluminous syenite-monzonite gneiss unit in a metaigneous complex composed 

of diorite gneiss and diorite with minor amphibolite, gabbro and cataclasite

Alteration:

Age of mineralization:

Deposit model:

Lode: pegmatite

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: Yes; small 

Site Status: Inactive

Workings/exploration:

Type of workings: surface

Page 20
Alaska Resource Data File NB010

Production notes: 

Reserves:

Additional comments:

Badly fractured habit, abundant feldspar inclusions, poor color and general scarcity of 

gem quality crystals have precluded economic development of this resource. See also: 

Rock Creek molybdenum prospect (NB009)

References:

Richter, 1970, USGS PP 700-C, p. C98-C102; Matson and Richter, 1971, USGS OF 473, 

p. 10; Richter and Schmoll, 1973, USGS GQ-1062, loc.5; Richter and others, 1975, 

USGS MF-655K, loc. 7

Primary reference: Richter, 1970, USGS PP 700-C 

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H. 

Last report date: 2/5/97

Page 21
Alaska Resource Data File NB011

Site name(s): Trail Creek

Site type: Prospect 

ARDFno.: NB011 

Latitude: 62.619 

Longitude: 143.243

Quadrangle: NB C-5

Location description and accuracy:

Best location: Richter and Schmoll, 1973, USGS GQ-1062, loc. 3. Accurate within 500 ft 

radius

Commodities:

Main: Au

Other:

Ore minerals: Gold 

Gangue minerals:

Geologic description:

Evidence of placer operations or exploration. No other data

Alteration:

Age of mineralization:

Deposit model:

Placer

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: Undet. 

Site Status: Inactive

Workings/exploration:

Type of workings: surface

Production notes:

Page 22
Alaska Resource Data File NB011

Reserves:

Additional comments:

Very little data available

References:

Moffit, 1941, USGS B 917-B, p. 155; Matson and Richter, 1971, USGS OF 473, p. 10; 

Richter and Schmoll, 1973, USGS GQ-1062, loc.3; Richter and others, 1975, USGS MF655K, loc. 61

Primary reference: Moffit, 1941, USGS B 917-B 

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H. 

Last report date: 2/6/97

Page 23
Alaska Resource Data File NB012

Sitename(s): Unnamed

Site type: Occurrence 

ARDFno.: NB012 

Latitude: 62.6144 

Longitude: 143.231

Quadrangle: NB C-5

Location description and accuracy:

Best location: Richter and Schmoll, 1973, USGS GQ 1062, loc. 2. Accurate within 100 ft 

radius

Commodities:

Main: Pb; Ag; Zn

Other:

Ore minerals: Galena, tetrahedrite, sphalerite 

Gangue minerals: Quartz, carbonate minerals

Geologic description:

Small quartz carbonate veins containing galena, sphalerite, and tetrahedrite in border zone 

of small diorite porphyry stock of Cretaceous-Tertertiary age that intrudes thin-bedded 

Triassic limestone.

Alteration:

Age of mineralization:

Deposit model:

Lode: vein

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Type of workings: surface

Page 24
Alaska Resource Data File NB012

Production notes: 

Reserves: 

Additional comments:

References:

Richter and Schmoll, 1973, USGS GQ-1062, loc. 2; Richter and others, 1975, USGS MF655K, loc. 8

Primary reference: Richter and Schmoll, 1973, USGS GQ-1062 

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H. 

Last report date: 2/6/97

Page 25
Alaska Resource Data File NB013

Site name(s): Unnamed

Site type: Occurrence 

ARDFno.: NB013 

Latitude: 62.4833 

Longitude: 143.067

Quadrangle: NB B-5

Location description and accuracy:

Best location: Lowe and others, 1982, USGS GQ-1566, loc. Ml. Accurate within 100 ft 

radius

Commodities:

Main: Cu

Other:

Ore minerals: Chalcopyrite 

Gangue minerals: Quartz

Geologic description:

Quartz vein containing pyrite and chalcopyrite in fault-shear zone in PennsylvanianPermian volcaniclastic rocks.

Alteration:

Age of mineralization:

Deposit model:

Lode: volcanogenic, shear zone

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Type of workings: surface

Production notes:

Page 26
Alaska Resource Data File NB013

Reserves: 

Additional comments:

References:

Richter and Matson, 1972, USGS MF-422, looc. 6; Richter and others, 1975, USGS MF655K, loc. 9; Lowe and others, 1982, USGS GQ-1566, loc. Ml.

Primary reference: Richter and others, 1975, USGS MF-655K 

Reporter(s): Leonard, K.R. (Elliott, R.L.); Richter, D.H. 

Last report date: 2/6/97

Page 27
Alaska Resource Data File NB014

Site name(s): Unnamed

Site type: Occurrence 

ARDFno.: NB014 

Latitude: 62.5331 

Longitude: 142.889

Quadrangle: NB C-4

Location description and accuracy:

Best location: Richter and others, 1976, USGS GQ-1303. Accurate within 100 ft radius

Commodities:

Main: Cu

Other:

Ore minerals: Native copper 

Gangue minerals:

Geologic description:

Native copper in fractures in amygdaloidal basalt flows of Triassic Nikolai Greenstone

Alteration:

Age of mineralization:

Deposit model:

Lode: volcanogenic

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Type of workings: none

Production notes: 

Reserves:

Page 28
Alaska Resource Data File NB014

Additional comments:

The Nikolai Greenstone itself is significant in that it may constitute a future low grade 

copper resource. It is widespread south of the Denali fault, has an overall thickness of 

2000 m and an average copper content of 150 ppm. Locally it contains small deposits of 

native copper, bornite, chalcocite, and chalcopyrite in amygdules, flow tops and bottoms, 

fractures and veins. USGS MF-655K, USGS OF 365 and USGS OF 366 contain maps 

showing several known occurences of copper minerals in the Nikolai Greenstone.

References:

Richter and others, 1975, USGS MF-655K, loc. 10: Richter and others, 1976, USGS GQ1303

Primary reference: Richter and others, 1975, USGS MF-655K 

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H. 

Last report date: 2/10/97

Page 29
Alaska Resource Data File NB015

Site name(s): Royal Development Co.

Site type: Prospect 

ARDFno.: NB015

Latitude: 62.374 

Longitude: 143.021

Quadrangle: NB B-5

Location description and accuracy:

Best location: Lowe and others, 1982, USGS GQ-1566, loc. M4. Accurate within 500 ft 

radius.

Commodities: 

Main: Au; Ag 

Other: Pb; Cu; Fe

Ore minerals: Native gold, pyrite, chalcopyrite, cerussite, anglesite. 

Gangue minerals: Quartz, magnetite, garnet

Geologic description:

Disseminated pyrite and quartz-pyrite veins in small diorite/granodiorite stock and in associated contact metamorphic aureole. The surface ore milled in 1907 was apparently derived from gossan overlying the contact between a Cretaceous diorite stock and host Triassic limestone. Gossan along intrusive contacts reported to pan free gold. See also: Nabesna mine (NB016)..

Alteration:

Age of mineralization:

Deposit model:

Lode: disseminated, skarn, gossan?

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: Undet. 

Site Status: Inactive 

Workings/exploration:

Page 30
Alaska Resource Data File NB015

Surface and underground. Two tunnels driven between 1907 and 1914 totaled 130 ft in 

length. Mining was in surface cut where a 12 in to 4 ft width was mined along contact 

deposit. Sample taken over 16 in width across contact deposit assayed 0.06 oz/ton Au 

and 0.20 oz/ton Ag (Pilgrim, E.R., 1931). Ore containing almost 1.5 oz/ton Au milled in 

1907 was probably not representative of deposit (USGS MF-655K, loc. 14). Extensive 

diamond drilling in 1980's.

Production notes: 

Reserves:

Additional comments:

See also: Nabesna mine (NB016)

References:

Wayland, 1943, USGS B 933B, p. 176: Pilgrim, E.R., 1931, Nabesna Mining Corp., 

Whitham Group in Stewart, B.D., Report on cooperation between the Territory of Alaska 

and the U.S. for the biennium ending March 31, 1931, pp. 60-61; Richter and others, 

1975, USGS MF-655K, loc. 14; Lowe and others, 1982, USGS GQ-1566, loc. M4.

Primary reference: Wayland, 1943, USGS B 933B 

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H. 

Last report date: 2/6/97

Page 31
Alaska Resource Data File NB016

Site name(s): Nabesna; Nabesna Mining Corporation 

Site type: Mine 

ARDFno.: NB016

Latitude: 62.377

Longitude: 143.016

Quadrangle: NB B-5

Location description and accuracy:

Best location: Lowe and others, 1982, USGS GQ-1566, loc. M3; on southeast flank of 

White Mtn. Accurate within 200 ft. radius

Commodities: 

Main: Au

Other: Ag; Cu; Pb; Fe; Zn 

Ore minerals: Gold, pyrite, cerussite, anglesite, chalcopyrite, galena, magnetite, sphalerite

Gangue minerals: Calcite, quartz, andradite, vesuvianite, diopside hedenbergite, magnetite, 

epidote, chlorite, serpentine, Wollastonite, Specularite, Brookite, Spinel, Sphene, Apatite, 

Gypsum

Geologic description:

Three types of mineral deposits: (1) principal ore: auriferous pyrite-calcite veins carrying 

chalcopyrite, sphalerite and galena in ore shoots ranging from a few in to 35 ft in width; 

average width 5 to 7 ft; quartz replaces calcite as gangue in upper portions of veins; (2) 

bodies of massive magnetite on the order of 50 ft by 100 ft carrying pyrite, calcite and 

some gold; (3) veins and masses of pyrrhotite containing disseminated pyrite, chalcopyrite and some gold; mine is at contact of Upper Triassic limestone and a small irregular 

Cretaceous quartz diorite stock associated with numerous satellite dikes of quartz diorite 

and minor quartz monzonite. Ore bodies and tactite formed in limestone along east contact of stock, large area of minor intrusive rock and extensive tactite lies just south of the 

principal ore bodies. 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. Principal mining at Nabesna from about 1930 to 1941. Several hundred 

meters of workings. Several episodes of exploration since 1960.

Alteration:

Oxidation effective to depth of several tens of ft; locally extends to more than 350 ft in

Page 32
Alaska Resource Data File NB016

depth.

Age of mineralization:

Cretaceous

Deposit model:

Fe skarn

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

18d Fe skarn

Production Status: Yes; medium 

Site Status: Inactive

Workings/exploration:

Several adits, 368 ft of surface cuts, 9224 ft of drifts, 6209 ft of raises (reported inaccessible in 1952), and 9,999 ft of drill holes by 1940. Apparently mined out and the mill and 

aerial tramway mostly destroyed by 1997. Five-foot sample across Bear vein assayed 

10.39 oz./t Au, 12.70 oz./t Ag, 1.67% Pb, 0.15% Cu and five-foot sample along limestone/diorite contact assayed 0.10 oz./t Au, 1.8 oz./t Ag, 4.2% Cu. More assay data are 

available in Pilgrim, E. R., 1931. Surface and underground workings.

Production notes:

Nabesna Mine produced about 1.66 million grams Au, minor Ag and Cu.

Reserves:

Additional comments:

Site of recent exploration. No recorded production from any other lode deposit in the district. USGS Bull. 1374, p. 115. See also: Golden Eagle claims, Royal Development Company.

References:

Lowe and others, 1982, USGS GQ-1566, loc. M3; Richter and others, 1975, USGS MF655-K, loc. 13; Smith, 1942, USGS B 933-A, p. 24, 76-77; Wayland, 1943, USGS B 

933-B 168, 175-199; Berg and Cobb, 1967, USGS B 1246, p. 205, 208-209; Pilgrim, E. 

R., 1931, Nabesna Mining Corporation, Whitham Group, in Stewart, B.D., Report on cooperation between the territory of Alaska and the United States in making mining investigations and in inspection of mines for the Biennium ending March 31, 1931, p. 60-62; 

Cobb, 1973, USGS B 1374, p. 114-115; Moffit, 1954, USGS B 989-D, p. 66, 189-190, 

201-203; Smith and others, 1933, USGS B 844, p. 21; Moffit, 1938, USGS B 844-C 

159-162; Moffit and Knopf, 1909, USGS B 379-D, p. 176-177

Primary reference: Wayland, 1943, USGS B 933B, p. 175-199

Page 33
Alaska Resource Data File NB016

Reporter(s): Leonard, K.R.; Nokleberg, W.J.; Richter, D.H. 

Last report date: 1/24/97

Page 34
Alaska Resource Data File NB017

Site name(s): Rambler; Golden Eagle Group; Cliff vein

Site type: Prospect 

ARDFno.: NB017

Latitude: 62.3831

Longitude: 143.006

Quadrangle: NB B-5

Location description and accuracy:

Best location: Lowe and others, 1982, USGS GQ-1566, loc. M2; 1/2 mi. N. of Nabesna 

mine, on N. side of Swede Gulch. Accurate within 100 ft. radius

Commodities:

Main: Au

Other:

Ore minerals: Pyrrhotite, pyrite; chalcopyrite and marcasite in thin section 

Gangue minerals:

Geologic description:

Massive gold-bearing pyrrhotite and pyrite in recrystallized Triassic limestone near contact with small granodiorite stock of Cretaceous age. Sulfide body is 52 ft by 19 ft by 34 

ft and consists of about 75% pyrrhotite in coarse crystals up to 2 in in diameter.

Alteration:

Pyrrhotite alters to marcasite along limonite-stained fractures

Age of mineralization:

Cretaceous

Deposit model:

Lode: massive sulfide, contact metasomatic

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

18d Fe skarn

Production Status: Undet. 

Site Status: Inactive

Page 35
Alaska Resource Data File NB017

Workings/exploration:

Average Au value of 14 samples was about 0.91 oz./t (reported as 32.00 dollars in Au); 

high value was 2.42 oz./t (reported as 85.00 dollars in Au, Au at 35.00/fine oz.) in USGS 

Bull. 933, p. 185. Surface and underground workings.

Production notes:

Possibly some minor production

Reserves:

Additional comments:

See Nabesna mine, NB016

References:

Lowe and others, 1982, USGS GQ-1566, loc. M2; Wayland, 1943, USGS B 933B, P. 

184-185; Richter and others, 1975, USGS MF-655K, loc. 12

Primary reference: Wayland, 1943, USGS B 933B, p. 184-185 

Reporter(s): Leonard, K.R. (Elliott, R.L.); Nokleberg, W.J.; Richter, D.H. 

Last report date: 1/24/97

Page 36
Alaska Resource Data File NB018

Site name(s): Monte Cristo Creek; Marie Nabesna

Site type: Prospect 

ARDFno.: NB018

Latitude: 62.2136 

Longitude: 142.999

Quadrangle: NB A-4

Location description and accuracy:

Best location: Richter, 1973, USGS 1-789, loc.l. Accurate within 100 ft radius

Commodities:

Main: Mo

Other:

Ore minerals: Molybdenite 

Gangue minerals: Quartz, pyrite, gypsum

Geologic description:

Disseminated molybdenite and quartz-pyrite-molybdenite veins in hydrothermally altered 

Chisana Formation volcanic rocks of Cretaceous age near Cretaceous granodiorite pluton.

Alteration:

Argillic, propylitic

Age of mineralization:

Deposit model:

Lode: porphyry, stock work

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Type of workings: surface

Production notes:

Page 37
Alaska Resource Data File NB018

Reserves:

Additional comments:

See also: Orange Hill, Bond Creek.

References:

Mendenhall and Schrader, 1903, USGS PP15, p.43-45; Richter and Matson, 1970, USGS 

OF 398, loc. 1; Richter, 1973, USGS 1-789, loc.l; Richter and others, 1975, USGS MF655K, loc. 16.

Primary reference:

Reporter(s): Leonard, K.R. (Elliott, R.L.); Richter, D.H.

Last report date: 2/4/97

Page 38
Alaska Resource Data File NB019

Site name(s): Unnamed 

Site type: Prospect 

ARDFno.: NB019 

Latitude: 62.2 

Longitude: 142.95

Quadrangle: NB A-4

Location description and accuracy:

Best location: Richter, 1973, USGS 1-789, loc. 5. Accurate within 100 ft radius

Commodities:

Main: Pb, Zn, Au, Ag, Cu

Other:

Ore minerals: Galena, sphalerite, chalcopyrite 

Gangue minerals: Quartz

Geologic description:

Quartz veins, up to 1 ft thick, containing sphalerite, galena and minor chalcopyrite in recrystallized Triassic limestone near contact with Cretaceous granodiorite stock.

Alteration:

Age of mineralization:

Deposit model:

lode, contact metasomatic

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: Undet. 

Site Status: Inactive

Workings/exploration:

Small prospect pits dug on veins. Chip sample across veins assayed 2.4 ppm Au, 200 

ppm Ag, >20,000 ppm Pb, > 10,000 ppm Zn, >20,000 ppm Cu (USGS OF 398, sample 

587). Type of workings: surface.

Page 39
Alaska Resource Data File NB019

Production notes: 

Reserves: 

Additional comments:

References:

Richter and Matson, 1970, USGS OF 398, loc. 5; Richter, 1973, USGS 1-789, loc. 5; 

Richter and others, 1975, USGS MF-655K, loc. 17

Primary reference:

Reporter(s): Leonard, K.R. (Elliott, R.L.); Richter, D.H.

Last report date: 2/6/97

Page 40
Alaska Resource Data File NB020

Site name(s): Nabesna River 

Site type: Prospect 

ARDFno.: NB020 

Latitude: 62.1908 

Longitude: 142.918

Quadrangle: NB A-4

Location description and accuracy:

Best location: Richter, 1973, USGS 1-789, loc. 6. Accurate within 100 ft radius

Commodities:

Main: Cu

Other: Ag; Zn 

Ore minerals: Chalcopyrite 

Gangue minerals: Quartz, pyrite

Geologic description:

Stockwork of quartz-pyrite veins and veinlets, containing minor chalcopyrite, cuts altered 

Tertiary hornblende dacite dike and Triassic Nikolai Greenstone country rock.

Alteration:

Age of mineralization:

Deposit model:

Lode: Stockwork

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Some drilling in this deposit indicates grades as high as 0.3% Cu with minor Ag and Zn 

values (USGS MF-655K); Type of workings: surface

Production notes:

Page 41
Alaska Resource Data File NB020

Reserves:

Additional comments:

See also: Nabesna Glacier prospect (NB029)

References:

Richter, 1973, USGS 1-789, loc. 6; Richter and others, 1975, USGS MF-655K, loc. 18.

Primary reference: Richter, 1973, USGS 1-789 

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H. 

Last report date: 2/5/97

Page 42
Alaska Resource Data File NB021

Site name(s): Unnamed 

Site type: Occurrence 

ARDFno.: NB021 

Latitude: 62.1513 

Longitude: 142.919

Quadrangle: NB A-4

Location description and accuracy:

Best location: Richter, 1973, USGS 1-789, loc. 9. Accurate within 100 ft radius

Commodities:

Main: Fe; Cu

Other:

Ore minerals: Magnetite, chalcopyrite 

Gangue minerals:

Geologic description:

Massive magnetite containing pyrite and minor chalcopyrite in amphibolitized Triassic 

Nikolai Greenstone near Tertiary porphyry intrusive.

Alteration:

Age of mineralization:

Deposit model:

Lode: contact metasomatic

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Type of workings: surface

Production notes:

Page 43
Alaska Resource Data File NB021

Reserves: 

Additional comments:

References:

Richter, 1973, USGS 1-789, loc. 9; Richter and others, 1975, USGS MF-655K, loc. 19.

Primary reference: Richter, 1973, USGS 1-789 

Reporter(s): Leonard, K.R. (Elliott, R.L.); Richter, D.H. 

Last report date: 2/6/97

Page 44
Alaska Resource Data File NB022

Site name(s): Unnamed

Site type: Occurrence 

ARDFno.: NB022 

Latitude: 62.149 

Longitude: 142.921

Quadrangle: NB A-4

Location description and accuracy:

Best location: Richter, 1973, USGS 1-789, loc. 10. Accurate within 500 ft radius

Commodities:

Main: Au; Co

Other:

Ore minerals: Gold, cobaltite 

Gangue minerals: Calcite

Geologic description:

10 to 20 cm calcite vein containing gold and cobaltite in Triassic Nikolai Greenstone near 

Tertiary porphyry intrusion.

Alteration:

Age of mineralization:

Deposit model:

Lode: vein

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Up to 10 oz/ton Au reported (USGS MF-655K). Type of workings: none

Production notes:

Page 45
Alaska Resource Data File NB022

Reserves:

Additional comments:

Only known gold-bearing vein in district that may be economically significant

References:

Richter, 1973, USGS 1-789, loc. 10; Richter and others, 1975, USGS MF-655K, loc. 20.

Primary reference: Richter, 1973, USGS 1-789 

Reporter(s): Leonard, K.R. (Elliott, R.L.); Richter, D.H. 

Last report date: 2/6/97

Page 46
Alaska Resource Data File NB023

Site name(s): Unnamed

Site type: Occurrence 

ARDFno.: NB023 

Latitude: 62.1303 

Longitude: 142.931

Quadrangle: NB A-4

Location description and accuracy:

Best location: Richter, 1973, USGS 1-789, loc. 11. Accurate within 100 ft radius

Commodities:

Main: Cu

Other:

Ore minerals: Chalcopyrite 

Gangue minerals:

Geologic description:

Small irregular masses of pyrite and minor chalcopyrite in Triassic Nikolai Greenstone 

probably near buried pluton.

Alteration:

Age of mineralization:

Deposit model:

Lode: contact metasomatic

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Type of workings: none

Production notes:

Page 47
Alaska Resource Data File NB023

Reserves: 

Additional comments:

References:

Richter, 1973, USGS 1-789, loc. 11; Richter and others, USGS MF-655K, loc. 21

Primary reference: Richter, 1973, USGS 1-789 

Reporter(s): Leonard, K.R. (Elliott, R.L.); Richter, D.H. 

Last report date: 2/6/97

Page 48
Alaska Resource Data File NB024

Site name(s): Orange Hill

Site type: Prospect 

ARDFno.: NB024 

Latitude: 62.2058 

Longitude: 142.842

Quadrangle: NB A-4

Location description and accuracy:

Best location: Richter, 1973, USGS 1-789, loc. 2; on California Gulch. Accurate within 

200 feet radius.

Commodities:

Main: Cu, Mo, Au, Ag

Other:

Ore minerals: Pyrite, chalcopyrite, molybdenite 

Gangue minerals: Quartz, calcite, gypsum

Geologic description:

Pyrite, chalcopyrite, and molybdenite occur in quartz veinlets and as disseminations in 

large Cretaceous quartz diorite/granodiorite pluton. Pluton intrudes volcanic and sedimentary rocks of Permian and Triassic age. Associated skarn mineralization in metamorphosed limestone country rock (see Lemon deposit) contains Cu and Zn sulfide minerals. 

Plutonic rocks intruded by alaskite dikes which are crosscut by dikes of andesite, dacite, 

and basaltic porphyry. Other similar deposits (Bond Creek) in the pluton exhibit same 

mineralogy. Abundant biotite-quartz, quartz-sericite, and chlorite-sericite-epidote alteration. Late anhydrite veins common. Altered areas about 1,000 by 3,000 m. Associated 

skarns contain pyrite, chalcopyrite, bornite, and magnetite.

Alteration:

Central altered zone 400 m by 2000 m contain abundant biotite, quartz veinlets, minor kfeldspar, chlorite, and sericite cut by late stage anhydrite veins. Outer altered zones contain chlorite, minor sericite and anhydrite.

Age of mineralization:

Early Cretaceous

Deposit model:

Porphyry, stockwork, skarn

Page 49
Alaska Resource Data File NB024

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

21a Porphyry Cu-Mo

Production Status: No 

Site Status: Inactive

Workings/exploration:

Developed by open cuts, shafts and 14 adits totaling between 250 and 300 ft, of which 

most reportedly were caved in 1944 (USGS OFR 76). 3187 ft of drilling done in 1927 

and 1928: 2021 ft in quartz diorite, 1166 ft in metamorphosed limestone.

Production notes:

Reserves:

Average grades from surface sampling: 0.25% Cu; all samples were below 0.4%; 0.01% 

TO 0.8% Mo; Au values from trace to 0.04 oz/ton, average Au grade estimated at 0.005 

oz/ton; average Ag grade estimated at 0.01 oz/ton. Estimated 320 million tonnes of 0.35% 

Cu and 0.02% Mo.

Additional comments:

This record contains data which apply to both the porphyry Cu and the associated contact 

metamorphic (skarn) deposits at Orange Hill; for data specific to contact metamorphic deposits, see Lemon prospect (NB025).

References:

Wayland, 1943, USGS B 933-B, p. 166-168; Van Alstine and Black, 1944, USGS OF 

76; Moffit, 1954, USGS B 989-D, p. 189, 201, 203, 205-207, 209; Richter and Matson, 

1970, USGS OF 398, loc. 2; Richter, 1973, USGS 1-789, loc. 2; Richter and others, 1975, 

USGS MF -655K, loc. 22; Hollister and others, 1975, CM B v. 68, no. 756, p. 108; Pilgrim, E.R., 1931, Alaska Nabesna Orange Hill copper claims, in Stewart, B.D., Report on 

cooperation between the territory of Alaska and the United States in making mining investigations and in inspection of mines for the Biennium ending March 31, 1931, p. 69- 

74.

Primary reference:

Reporter(s): Leonard, K.R. (Elliott, R.L.); Nokleberg, W.J.; Richter, D.H.

Last report date: 1/27/97

Page 50
Alaska Resource Data File NB025

Site name(s): Lemon claims; Copper King

Site type: Prospect 

ARDFno.: NB025

Latitude: 62.197 

Longitude: 142.82

Quadrangle: NB A-4

Location description and accuracy:

Best location: Richter and others, 1975, USGS MF-655K, loc. 23. Accurate to within 

1000ft. radius

Commodities:

Main: Cu; Au Ag; Zn; Fe

Other: 

Ore minerals: Pyrrhotite, pyrite, chalcopyrite, sphalerite, magnetite, bornite

Gangue minerals: Garnet, wollastonite, epidote, diopside, magnetite, hematite, sphalerite, 

molybdenite, tetrahedrite, gypsum, powellite

Geologic description:

Disseminated pyrrhotite, pyrite, and chalcopyrite in magnetite-rich skarn and veins of pyrite, chalcopyrite, and sphalerite in magnetite bodies and cutting skarn; some stringers of 

bornite and magnetite. Skarn developed in Permian limestone adjacent to Cretaceous 

quartz diorite intrusive and to porphyry Cu-Mo deposit at Orange Hill. Skarn grades outward into hornfels.

Alteration:

Secondary minerals: molybdenite, chrysocolla, malachite, azurite, covellite.

Age of mineralization:

Early Cretaceous

Deposit model:

Contact metasomatic, skarn

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

18b Cu skarn

Production Status: No

Page 51
Alaska Resource Data File NB025

Site Status: Inactive

Workings/exploration:

Explored by short adits and diamond drilling. 188-foot core sample (Lemon Extension 

#2, Pilgrim, E.R., 1931) contained 0.3 TO 3.8 % Cu, average 0.95% Cu. Weighted averages from channel samples, Lemon Claim #2 (USGS OFR 76, p. 16) contained 0.71% 

Cu, 0.024 oz./t Au, 0.66 oz./t Ag. 8-foot channel sample from massive sulfide body 30 ft. 

long and 3 to 8 ft. thick (USGS OFR 76, p. 10, 11, table 2 no. 27) contained 0.32% Cu, 

0.08 oz./t Au, 6.12% Zn, 38.84% Fe. Surface and underground workings.

Production notes: 

Reserves:

Additional comments:

Considered as part of Orange Hill porphyry copper deposit. This listing contains data 

specific to contact metasomatic deposits associated with the quartz diorite at Orange Hill. 

See Orange Hill deposits (NB024).

References:

Van Alstine and Black, 1944, USGS OF 76; Richter and Matson, 1970, USGS OF 398, 

loc. 2; Richter, 1973, USGS 1-789, loc. 2; Richter and others, 1975, USGS MF-655K, 

loc. 23; Pilgrim, E.R., 1931, Alaska Nabesna Orange Hill Copper Claims, in Stewart, B. 

D., Report on cooperation between the territory of Alaska and the United States in making mining investigations and in inspection of mines for the Biennium ending March 31, 

1931, p. 69-74

Primary reference:

Reporter(s): Leonard, K.R.; Elliott, R.L.; Nokleberg, W.J.; Richter, D.H.

Last report date: 1/28/97

Page 52
Alaska Resource Data File NB026

Site name(s): Unnamed

Site type: Occurrence 

ARDFno.: NB026 

Latitude: 62.1556 

Longitude: 142.828

Quadrangle: NB A-4

Location description and accuracy:

Best location: Richter, 1973, USGS 1-789, loc.7. Accurate within 100 ft radius

Commodities:

Main: Cu

Other:

Ore minerals: Chalcopyrite 

Gangue minerals: Quartz

Geologic description:

Disseminated chalcopyrite and pyrite in stockwork veins in altered quartz porphyry believed to be shallow silicic intrusives, tuffs or domes in Upper Paleozoic Tetelna Volcanics.

Alteration:

Age of mineralization:

Deposit model:

Lode: vein, disseminated

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Type of workings: surface

Production notes:

Page 53
Alaska Resource Data File NB026

Reserves:

Additional comments:

See also: unnamed deposit NB027

References:

Richter and Matson, 1970, USGS OF 398, Area 6; Richter, 1973, USGS 1-789, loc.7; 

Richter and others, 1975, USGS MF-655K, loc.24.

Primary reference: Richter, 1973, USGS 1-789 

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H. 

Last report date: 2/7/97

Page 54
Alaska Resource Data File NB027

Sitename(s): Unnamed 

Site type: Occurrence 

ARDFno.: NB027 

Latitude: 62.1461 

Longitude: 142.822

Quadrangle: NB A-4

Location description and accuracy:

Best location: Richter, 1973, USGS 1-789, loc. 8. Accurate within 100 ft radius

Commodities:

Main: Cu

Other:

Ore minerals: Chalcopyrite 

Gangue minerals: Quartz, pyrite

Geologic description:

Quartz-pyrite veins and veinlets containing minor chalcopyrite in a quartz porphyry of the 

Upper Paleozoic Tetelna Volcanics. Porphyry may represent a shallow intrusive, tuff, or 

dome.

Alteration:

Age of mineralization:

Deposit model:

Lode: stockwork

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Type of workings: surface

Production notes:

Page 55
Alaska Resource Data File NB027

Reserves:

Additional comments:

See also unnamed deposit NB026

References:

Richter and Matson, 1970, USGS OF 398, Area 6; Richter, 1973, USGS 1-789, loc. 8; 

Richter and others, 1975, USGS MF-655K, loc. 25.

Primary reference: Richter, 1973, USGS 1-789 

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H. 

Last report date: 2/7/97

Page 56
Alaska Resource Data File NB028

Site name(s): Unnamed

Site type: Occurrence 

ARDFno.: NB028 

Latitude: 62.1158 

Longitude: 142.82

Quadrangle: NB A-4

Location description and accuracy:

Best location: Richter, 1973, USGS 1-789, loc. 13. Accurate within 100 ft radius

Commodities:

Main: Cu, Zn

Other:

Ore minerals: Chalcopyrite, sphalerite 

Gangue minerals: Quartz, pyrite

Geologic description:

Quartz-pyrite vein containing chalcopyrite and sphalerite in quartz porphyry. Porphyry is 

altered silicic tuff or shallow intrusive in Upper Paleozoic Tetelna Volcanics.

Alteration:

Age of mineralization:

Deposit model:

Lode:, vein

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Channel sample across 1 ft qtz vein assayed: 0.06 ppm Au, 15 ppm Ag, >20,000 ppm Cu, 

15 ppm Mo, 700 ppm Pb, >10,000 ppm Zn (USGS OF 398, no. 226). Type of workings: 

surface.

Page 57
Alaska Resource Data File NB028

Production notes: 

Reserves:

Additional comments:

See also unnamed deposits NB026, NB027.

References:

Richter and Matson, 1970, USGS OF 398, sample 226; Richter, 1973, USGS 1-789, 

loc.13; Richter and others, 1975, USGS MF-655K, loc. 26.

Primary reference: Richter, 1973, USGS 1-789 

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H. 

Last report date: 2/7/97

Page 58
Alaska Resource Data File NB029

Site name(s): Nabesna Glacier

Site type: Prospect 

ARDFno.: NB029 

Latitude: 62.1125 

Longitude: 142.833

Quadrangle: NB A-4

Location description and accuracy:

Best location: Richter, 1973, USGS 1-789, loc. 12; on eastern margin of Nabesna Glacier. 

Accurate within 100 ft. radius.

Commodities:

Main: Cu; Zn; Au

Other:

Ore minerals: Chalcopyrite, galena, sphalerite, gold 

Gangue minerals: Quartz, pyrite

Geologic description:

Quartz-pyrite veins and veinlets in 300 ft by 100 ft altered zone; locally Au-bearing and 

copper stained; veins carry minor sphalerite and chalcopyrite. Host rock is a buff to graygreen massive volcanic rock, locally brecciated and mineralized, containing quartz eyes 

up to 1/2 in diameter in fine grained matrix of quartz, feldspar, and white mica. 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.

Alteration:

Strong hydrothermal limonitic staining.

Age of mineralization:

Cretaceous and Early Tertiary

Deposit model:

Gold sulfide alterations and veins

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

22c Polymetallic vein

Production Status: No

Page 59
Alaska Resource Data File NB029

Site Status: Inactive

Workings/exploration:

Random chip sample across 300 ft of copper-stained rock (Richter and Matson, 1970, 

USGS OF 398 sample no. 227) contained 2 ppm Ag, 300 ppm Cu, 70 ppm Pb. Channel 

sample across 2-foot quartz-pyrite vein (sample no. 228) contained 0.02 ppm Au, 50 ppm 

Ag, more than 20,000 ppm Cu, 200 ppm Mo, 1500 ppm Pb, more than 10,000 ppm Zn. 

Analyses: gold by atomic absorption, all others semi-quantitative spectrographic method. 

Type of workings: surface.

Production notes: 

Reserves:

Additional comments:

Altered rocks have been interpreted as volcanic flow or shallow intrusive. Earliest report 

describes altered quartz porphyry and diorite as host rock.

References:

Richter and Matson, 1970, USGS OF 398, area 7, samples 227, 228; Richter, 1973, 

USGS 1-789, loc. 12; Richter and others, 1975, USGS MF-655K, loc. 27.

Primary reference: Richter, 1973, USGS 1-789

Reporter(s): Leonard, K.R.; Elliott, R.L.; Nokleberg, W.J.; Richter, D.H.

Last report date: 1/28/97

Page 60
Alaska Resource Data File NB030

Site name(s): Unnamed 

Site type: Occurrence 

ARDFno.: NB030 

Latitude: 62.0353 

Longitude: 142.841

Quadrangle: NB A-4

Location description and accuracy:

Best location: Richter, 1973, USGS 1-789, loc. 18. Accurate within 100 ft radius

Commodities:

Main: Cu

Other:

Ore minerals: Malachite, azurite 

Gangue minerals:

Geologic description:

Zone of malachite- and azurite-stained amygdaloidal basalt 200 ft long and 30 ft wide. 

Basalt is part of the Triassic Nikolai Greenstone.

Alteration:

Age of mineralization:

Deposit model:

Lode: volcanogenic, supergene

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Chip sample across 50 ft of Cu-stained basalt ran: >20,000 ppm Cu and 1.5 ppm Ag 

(USGS OF 398, sample 231). Type of workings: surface

Production notes:

Page 61
Alaska Resource Data File NB030

Reserves: 

Additional comments:

References:

Richter and Matson, 1970, USGS OF 398, area 9; Richter, 1973, USGS 1-789, loc. 18; 

Richter and others, 1975, USGS MF-655K, loc. 28.

Primary reference: Richter, 1973, USGS 1-789 

Reporter(s): Leonard, K.R. (Elliott, R.L.); Richter, D.H. 

Last report date: 2/7/97

Page 62
Alaska Resource Data File NB031

Sitename(s): Unnamed 

Site type: Occurrence 

ARDFno.: NB031 

Latitude: 62.1819 

Longitude: 142.766

Quadrangle: NB A-4

Location description and accuracy:

Best location: Richter, 1973, USGS 1-789, loc.4. Accurate within 100 ft radius

Commodities:

Main: Cu, Pb

Other:

Ore minerals: Chalcopyrite, galena 

Gangue minerals: Quartz

Geologic description:

Hydrothermally altered and brecciated upper Paleozoic Tetelna Volcanics cemented by 

quartz containing minor chalcopyrite, pyrite and galena.

Alteration:

Age of mineralization:

Deposit model:

Lode: breccia pipe ?

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Type of workings: surface

Production notes:

Page 63
Alaska Resource Data File NB031

Reserves: 

Additional comments:

References:

Richter, 1973, USGS 1-789, loc. 4; Richter and others, 1975, USGS MF-655K, loc. 29.

Primary reference: Richter, 1973, USGS 1-789 

Reporter(s): Leonard, K.R. (Elliott, R.L.); Richter, D.H. 

Last report date: 2/7/97

Page 64
Alaska Resource Data File NB032

Site name(s): Bond Creek 

Site type: Prospect 

ARDFno.: NB032 

Latitude: 62.2 

Longitude: 142.706

Quadrangle: NB A-4

Location description and accuracy:

Richter, 1973, USGS 1-789 loc. 3. 4 mi. E. of Orange Hill deposit. Accurate within 200 

ft.

Commodities:

Main: Cu, Mo, Au, Ag

Other:

Ore minerals: Chalcopyrite, molybdenite, gold 

Gangue minerals: Pyrite, quartz

Geologic description:

Pyrite, chalcopyrite, and minor molybdenite in quartz veinlets and as disseminations in 

highly altered Permian volcanic rocks adjacent to Cretaceous granodiorite/quartz monzonite/quartz diorite pluton.

Alteration:

Central altered zone (about 600 x 2000 m) contains abundant chlorite, minor biotite and 

k-feldspar, spotty sericite. Outer zones (about 2000 x 3000 m) contain minor chlorite, 

epidote, and anhydrite.

Age of mineralization:

Early Cretaceous

Deposit model:

Porphyry; vein; stockwork

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

21a Porphyry Cu-Mo

Production Status: No

Page 65
Alaska Resource Data File NB032

Site Status: Inactive

Workings/exploration:

Surface workings.

Production notes:

Reserves:

500 million tonnes of 0.30% Cu and 0.02% Mo (USGS MF-655K).

Additional comments:

Largest porphyry copper deposit known in the Nabesna quadrangle. See also: Orange Hill 

deposit (NB024).

References:

Richter and others, 1975, USGS MF-655K, loc. 30; Cobb and Richter, 1980, USGS OF 

80-927, p. 11; Richter and Matson, 1970, USGS OF 398, loc. 3; Richter, 1973, USGS I789, loc. 3; Hollister and others, 1975, CM Bull., v. 68, no. 756, p. 108.

Primary reference:

Reporter(s): Elliott, R.L.; Nokleberg, W.J.; Richter, D.H.

Last report date: 1/27/97

Page 66
Alaska Resource Data File NB033

Site name(s): Camp Creek

Site type: Occurrence 

ARDFno.: NB033 

Latitude: 62.34 

Longitude: 142.73

Quadrangle: NB B-4

Location description and accuracy:

Best location: Richter and others, 1975, USGS MF-655-K, loc. 15. Accurate within 1/2 

mi radius

Commodities:

Main: Cu

Other:

Ore minerals: Chalcocite 

Gangue minerals:

Geologic description:

Chalcocite vein, 6 in to 2 ft in width, in amygdaloidal basalt flows of Triassic Nikolai 

Greenstone.

Alteration:

Age of mineralization:

Deposit model:

Lode: volcanogenic

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Small sample assayed 61% Cu (USGS PP15, p. 39). Type of workings: surface

Production notes:

Page 67
Alaska Resource Data File NB033

Reserves: 

Additional comments:

References:

Mendenhall and Schrader, 1903, USGS PP 15, p. 39; Richter and others, 1975, USGS 

MF-655-K, loc. 15.

Primary reference: Mendenhall and Schrader, 1903, USGS PP 15, p.39 

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H. 

Last report date: 1 /31797

Page 68
Alaska Resource Data File NB034

Site name(s): East Fork Porphyry Molybdenum

Site type: Prospect 

ARDFno.: NB034

Latitude: 62.2258 

Longitude: 142.675

Quadrangle: NB A-4

Location description and accuracy:

Best location: Richter, 1973, USGS 1-789, loc. 19; vicinity of Bond Cr.-Orange Hill deposits. Accurate within 100 ft radius

Commodities:

Main: Mo

Other:

Ore minerals: Molybdenite 

Gangue minerals: Quartz, pyrite

Geologic description:

Quartz-pyrite-molybdenite veins and veinlets in strongly altered and brecciated trondhjemite of Cretaceous age.

Alteration:

Age of mineralization:

Deposit model:

Lode: porphyry

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

No data available, probably low grade. Type of workings: surface

Production notes:

Page 69
Alaska Resource Data File NB034

Reserves:

Additional comments:

Deposit is of interest mainly due to its proximity to two large tonnage, low grade porphyry copper deposits at Bond Creek and Orange Hill. See also: Monte Cristo Creek 

(NB018)

References:

Richter, 1973, USGS 1-789, loc. 19; Richter and others, 1975, USGS MF-655K, loc. 31,

Primary reference: Richter, 1973, USGS 1-789, loc. 19 

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H. 

Last report date: 2/4/97

Page 70
Alaska Resource Data File NB035

Sitename(s): Unnamed

Site type: Occurrence 

ARDFno.: NB035 

Latitude: 62.1714 

Longitude: 142.619

Quadrangle: NB A-4

Location description and accuracy:

Best location: Richter, 1973, USGS 1-789, loc. 15. Accurate within 100 ft radius

Commodities:

Main: Cu

Other:

Ore minerals: Chalcopyrite 

Gangue minerals: Quartz, pyrite

Geologic description:

Brecciated and altered volcanic rocks of the upper Paleozoic Tetelna Volcanics cemented 

by quartz, pyrite and chalcopyrite. Volcanic rocks intruded by small Tertiary porphyry 

stock.

Alteration:

Age of mineralization:

Deposit model:

Lode: breccia pipe?

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Type of workings: surface

Production notes:

Page 71
Alaska Resource Data File NB035

Reserves: 

Additional comments:

References:

Richter, 1973, USGS 1-789, loc. 15: Richter and others, 1975, USGS MF-655K, loc. 32.

Primary reference: Richter, 1973, USGS 1-789 

Reporter(s): Leonard, K.R. (Elliott, R.L.); Richter, D.H. 

Last report date: 2/7/97

Page 72
Alaska Resource Data File NB036

Site name(s): Unnamed

Site type: Occurrence 

ARDFno.: NB036 

Latitude: 62.115 

Longitude: 142.667

Quadrangle: NB A-4

Location description and accuracy:

Best location: Richter, 1973, USGS 1-789, loc. 14. Accurate within 100 ft radius

Commodities:

Main: Cu, Pb, Zn

Other:

Ore minerals: Chalcopyrite, galena, sphalerite 

Gangue minerals: Quartz

Geologic description:

Quartz vein containing minor chalcopyrite, galena and sphalerite; country rock is upper 

Paleozoic Tetelna Volcanics.

Alteration:

Age of mineralization:

Deposit model:

Lode: vein

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Type of workings: surface

Production notes:

Page 73
Alaska Resource Data File NB036

Reserves: 

Additional comments:

References:

Richter, 1973, USGS 1-789, loc. 14; Richter and others, 1975, USGS MF-655K, loc. 33.

Primary reference: Richter, 1973, USGS 1-789 

Reporter(s): Leonard, K.R. (Elliott, R.L.); Richter, D.H. 

Last report date: 2/7/97

Page 74
Alaska Resource Data File NB037

Site name(s): Cross Creek

Site type: Prospect 

ARDFno.: NB037 

Latitude: 62.0867 

Longitude: 142.588

Quadrangle: NB A-4

Location description and accuracy:

Best location: Richter, 1973, USGS 1-789, loc. 16. Accurate within 100 ft radius

Commodities:

Main: Ag; Pb; Zn; Cu

Other:

Ore minerals: Galena, sphalerite, chalcopyrite 

Gangue minerals: Quartz

Geologic description:

Zone of intense hydrothermal alteration containing fragments of volcanic rock cemented 

by quartz carrying pyrite, galena, sphalerite and chalcopyrite. Country rock is mapped as 

Tertiary porphyry complex, but may include argillite and limestone of Permian age, gabbro dikes and sills of Triassic age, and rocks of the Pennsylvanian-Permian Tetelna Volcanic s

Alteration:

Deuteric, hydrothermal

Age of mineralization:

Deposit model:

Lode: breccia pipe

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive 

Workings/exploration:

Page 75
Alaska Resource Data File NB037

Grab sample of limonite-stained material (USGS OF 398, sample 848) contained 50 ppm 

Ag, 100 ppm Cu, more than 10,000 ppm Pb, more than 10,000 ppm Zn. Type of workings: surface

Production notes: 

Reserves: 

Additional comments:

References:

Moffit, 1943, USGS B 933-B, p. 174; USGS BULL 1246, P. 209; Richter and Matson, 

1970, USGS OF 398, loc. 8; Richter, 1973, USGS 1-789, loc. 16; Richter and others, 

1975, USGS MF-655K, loc. 34.

Primary reference:

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H.

Last report date: 1/31/97

Page 76
Alaska Resource Data File NB038

Site name(s): Unnamed 

Site type: Occurrence 

ARDFno.: NB038 

Latitude: 62.0717 

Longitude: 142.576

Quadrangle: NB A-4

Location description and accuracy:

Best location: Richter, 1973, USGS 1-789, loc. 17. Accurate within 100 ft radius

Commodities:

Main: Cu, Pb, Zn

Other:

Ore minerals: Chalcopyrite, galena, sphalerite 

Gangue minerals: Quartz, pyrite

Geologic description:

Quartz vein containing minor pyrite, chalcopyrite, galena and sphalerite in hornfelsed volcanic country rock containing disseminated galena and sphalerite. Country rock is upper 

Paleozoic Tetelna Volcanics near Tertiary hornblende porphyry.

Alteration:

Age of mineralization:

Deposit model:

Lode: vein, disseminated

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Sample of volcanic hornfels with disseminated sulfides ran: 0.9 ppm Au, 300 ppm Cu, 5 

ppm Mo, 3000 ppm Pb, >10,000 ppm Zn (USGS OF 398, sample 834); Type of workings: surface

Page 77
Alaska Resource Data File NB038

Production notes: 

Reserves:

Additional comments:

See also: Cross Creek prospect (NB037)

References:

Richter and Matson, 1970, USGS OF 398, sample 834; Richter, 1973, USGS 1-789, loc. 

17; Richter and others, 1975, USGS MF-655K, loc. 35.

Primary reference: Richter, 1973, USGS 1-789 

Reporter(s): Leonard, K.R., Elliott, R.L.; Richter, D.H. 

Last report date: 2/7/97

Page 78
Alaska Resource Data File NB039

Sitename(s): Unnamed

Site type: Occurrence 

ARDFno.: NB039 

Latitude: 62.1989 

Longitude: 142.44

Quadrangle: NB A-3

Location description and accuracy:

Best location: Richter and Matson, 1969, USGS OF 365, loc. 329. Accurate within 100 ft 

radius

Commodities:

Main: Cu

Other:

Ore minerals: Secondary Cu minerals 

Gangue minerals:

Geologic description:

Copper-stained breccia at contact between Cretaceous granodiorite and Triassic limestone

Alteration:

Age of mineralization:

Deposit model:

Lode: contact metamorphic?

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Chip sample across 1.5 ft of Cu-stained breccia assayed: 2.0 ppm Au, 3 ppm Ag, 700 ppm 

B, 7000 ppm Cu, 700 ppm Zn (USGS OF 365, sample 329). Type of workings: surface

Production notes:

Page 79
Alaska Resource Data File NB039

Reserves:

Additional comments:

Possibly related to several skarn occurrences about 2 mi SW in SW 1/4, sec. 29, T. 5 N, 

R. 16 E., Nabesna A-3 quadrangle; see USGS OF 365

References:

Richter and Matson, 1969, USGS OF 365, loc. 329; Richter, 1971, USGS 1-655

Primary reference: Richter and Matson, 1971, USGS OF 365 

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H. 

Last report date: 2/10/97

Page 80
Alaska Resource Data File NB040

Site name(s): Unnamed

Site type: Occurrence 

ARDFno.: NB040 

Latitude: 62.18 

Longitude: 142.41

Quadrangle: NB A-3

Location description and accuracy:

Best location: Richter and Matson, 1969, USGS OF 365. Accurate within 1000 ft radius

Commodities:

Main: Gypsum, var. alabas

Other:

Ore minerals: Gypsum 

Gangue minerals:

Geologic description:

Pods of massive gypsum (variety: alabaster) up to 5 ft thick in amphibolitized amygdaloidal basalt of Triassic age (Nikolai Greenstone).

Alteration:

Age of mineralization:

Deposit model:

Lode: podiform

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Type of workings: none

Production notes:

Page 81
Alaska Resource Data File NB040

Reserves:

Additional comments:

Possibly source of material for sculpting.

References:

Richter and Matson, 1969, USGS OF 365; Richter, 1971, USGS 1-655

Primary reference: Richter and Matson, 1969, USGS OF 365 

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H. 

Last report date: 2/10/97

Page 82
Alaska Resource Data File NB041

Site name(s): Unnamed

Site type: Occurrence 

ARDFno.: NB041 

Latitude: 62.12 

Longitude: 142.35

Quadrangle: NB A-3

Location description and accuracy:

Best location: Richter and Matson, 1969, USGS OF 365. Accurate within 1000 ft radius

Commodities:

Main: Ba

Other:

Ore minerals: Barite 

Gangue minerals:

Geologic description:

Massive dark gray barite float nearly in place; area underlain by clastic rocks of Permian 

Eagle Creek Formation intruded by Triassic gabbro dikes and sillswhich locally comprise 

70% of the section

Alteration:

Age of mineralization:

Deposit model:

Lode: massive

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Type of workings: none

Production notes:

Page 83
Alaska Resource Data File NB041

Reserves: 

Additional comments:

References:

Richter and Matson, 1969, USGS OF 365; Richter, 1971, USGS 1-655

Primary reference: Richter and Matson, 1969, USGS OF 365 

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H. 

Last report date: 2/10/97

Page 84
Alaska Resource Data File NB042

Site name(s): Unnamed 

Site type: Occurrence 

ARDFno.: NB042 

Latitude: 62.4269 

Longitude: 142.312

Quadrangle: NB B-3

Location description and accuracy:

Best location: Richter, 1975, USGS 1-904. Accurate within 100 ft radius

Commodities:

Main: Cu

Other:

Ore minerals: Chalcopyrite, bornite 

Gangue minerals: Quartz, pyrite

Geologic description:

Quartz veinlets containing minor chalcopyrite, pyrite and bornite in hornblende syenodiorite pluton of Cretaceous age.

Alteration:

Age of mineralization:

Deposit model:

Lode: vein

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Type of workings: surface

Production notes:

Page 85
Alaska Resource Data File NB042

Reserves:

Additional comments:

See also: unnamed occurrence no. NB043

References:

Richter, 1975, USGS 1-904; Richter and others, 1975, MF-655K, loc. 36.

Primary reference: Richter, 1975, USGS 1-904 

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H. 

Last report date: 2/7/97

Page 86
Alaska Resource Data File NB043

Site name(s): Unnamed 

Site type: Occurrence 

ARDFno.: NB043 

Latitude: 62.4164 

Longitude: 142.302

Quadrangle: NB B-3

Location description and accuracy:

Best location: Richter, 1975, USGS 1-904. Accurate within 100 ft radius

Commodities:

Main: Cu

Other:

Ore minerals: Chalcopyrite 

Gangue minerals:

Geologic description:

Segregations of pyrite and chalcopyrite in hornblendite border zone of large hornblende 

syenodiorite (Antler Creek) pluton of Cretaceous age.

Alteration:

Age of mineralization:

Deposit model:

Lode: vein?

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Type of workings: none

Production notes:

Page 87
Alaska Resource Data File NB043

Reserves:

Additional comments:

See also: unnamed occurrence no. NB042

References:

Richter, 1975, USGS 1-904; Richter and others, 1975, USGS MF-655K, loc. 37.

Primary reference: Richter, 1975, USGS 1-904 

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H. 

Last report date: 2/7/97

Page 88
Alaska Resource Data File NB044

Site name(s): Big Eldorado Creek 

Site type: Mine 

ARDFno.: NB044 

Latitude: 62.11 

Longitude: 141.94

Quadrangle: NB A-2

Location description and accuracy:

Best location: Richter and Jones, 1973, USGS 1-749; tributary to Chavolda Cr. Accurate 

within 1000 ft radius.

Commodities:

Main: Au

Other:

Ore minerals: Gold 

Gangue minerals:

Geologic description:

Two placers described in USGS Bull. 622 had dimensions of 600 ft by 12 ft with 6 ft of 

gravel, and 250 ft by 30 ft with 2 ft of gravel. Gravels up to 10 ft deep reported. Top 2 to 

4 ft of diorite bedrock was also mined. This placer is unique to the district in that it is 

probably a primary concentration of placer gold. All other placers in the district are derived from reworked Tertiary gravels.

Alteration:

Age of mineralization:

Deposit model:

Placer, stream

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: Yes; small 

Site Status: Active 

Workings/exploration:

Page 89
Alaska Resource Data File NB044

Some of the ground that was mined was frozen. Type of workings: surface 

Production notes: 

Reserves:

Additional comments:

See also: Big Eldorado lode prospect (NB045)

References:

Brooks, 1915, USGS B 622, p. 204-205, 211, 220-221; Brooks, 1916, USGS B 642, p. 

62; Smith, 1941, USGS B 926-A, p. 53; Moffit, 1954, USGS B 989-D, p. 199, Cobb, 

USGS B 1374, P. 115; Richter and Jones, 1973, USGS 1-749; Richter and others, 1975, 

USGS MF-655K, loc. 64

Primary reference:

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H.

Last report date: 3/7/94

Page 90
Alaska Resource Data File NB045

Site name(s): Big Eldorado

Site type: Prospect 

ARDFno.: NB045 

Latitude: 62.1075 

Longitude: 141.937

Quadrangle: NB A-2

Location description and accuracy:

Best location: Richter and Jones, 1973, USGS 1-749 (marked Cu on Big Eldorado Cr). 

Accurate within 100 ft radius.

Commodities:

Main: Cu; Au

Other:

Ore minerals: Pyrite, chalcopyrite, gold 

Gangue minerals: Quartz

Geologic description:

Quartz vein containing pyrite, chalcopyrite and gold in syenodiorite of Cretaceous age.

Alteration:

Age of mineralization:

Deposit model:

Lode: vein

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

22C Polymetallic vein

Production Status: No

Site Status: Inactive

Workings/exploration:

No data available. Type of workings: surface

Production notes:

Page 91
Alaska Resource Data File NB045

Reserves: 

Additional comments:

References:

Richter and Jones, 1973, USGS 1-749; Richter and others, 1975, USGS MF-655-K, loc. 

31.

Primary reference: Richter and others, 1975, USGS MF-655-K, loc.31. 

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H. 

Last report date: 1/28/97

Page 92
Alaska Resource Data File NB046

Site name(s): Erie

Site type: Prospect 

ARDFno.: NB046 

Latitude: 62.0822 

Longitude: 141.867

Quadrangle: NBA-2

Location description and accuracy:

Best location: Richter and Jones, 1973, USGS 1-749; prospects at mouth of Bonanza 

Creek, tributary to Chathenda Creek. Accurate within 1000 ft radius

Commodities:

Main: Au; Ag; Pb

Other:

Ore minerals: Native gold, argentiferous galena 

Gangue minerals: Quartz, pyrite

Geologic description:

Small pyrite and quartz veins in dike that strikes N20W with 75N dip. Dike reportedly is 

auriferous but see additional comments. Dike cuts Cretaceous lavas and pyroclastics of 

Chisana Formation

Alteration:

Age of mineralization:

Deposit model:

Lode: vein, disseminated

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: Undet. 

Site Status: Inactive

Workings/exploration:

Several short adits, present condition unknown. Galena containing 22 oz/ton Ag reported 

by Moffit, 1943, USGS B 933-B, p. 165. Type of workings: surface and underground

Page 93
Alaska Resource Data File NB046

Production notes: 

Reserves:

Additional comments:

Richter and Matson (1970, USGS OF 397) reported that samples collected from this prospect area contained no gold. See also: Chathenda Creek (NB051)

References:

Capps, 1916,USGS B 630, p. 90, 118-119; Moffit, 1943, USGS B 933-B, p. 164-165; 

Richter and Matson, 1970, USGS OF 397; Richter and Jones, 1973, USGS 1-749; Richter 

and others, 1975, USGS MF-655K, loc. 42.

Primary reference:

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H.

Last report date: 2/4/97

Page 94
Alaska Resource Data File NB047

Site name(s): Bryan Creek

Site type: Prospect 

ARDFno.: NB047 

Latitude: 62.0363 

Longitude: 141.943

Quadrangle: NB A-2

Location description and accuracy:

Best location: Richter and Jones, 1973, USGS 1-749; tributary to Chisana River just south 

of Chathenda Cr. Accurate within 100 ft radius

Commodities:

Main: Cu, Au

Other:

Ore minerals: Native copper, gold 

Gangue minerals:

Geologic description:

Abundant copper nuggets and some gold in stream gravels, especially on false clay bedrock

Alteration:

Age of mineralization:

Deposit model:

Placer: stream

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

39a

Production Status: Undet. 

Site Status: Inactive

Workings/exploration:

Type of workings: surface

Page 95
Alaska Resource Data File NB047

Production notes: 

Reserves:

Additional comments:

Cu nuggets also found in Bonanza and Chathenda Creeks

References:

Brooks, 1915, USGS B 622, p. 223; Moffit, 1954, USGS B 989-D, p. 200; Richter and 

Jones, 1973, USGS 1-749; Richter and others, 1975, USGS MF-655K, loc. 68; MILS 

#0020780067

Primary reference:

Reporter(s): Leonard, K.R.; Elliott, R.L.; D.Singer; Richter, D.H.

Last report date: 1/30/97

Page 96
Alaska Resource Data File NB048

Site name(s): Gold Run Creek area; includes Discovery Pup, Poorman 

Creek.

Site type: Mine 

ARDFno.: NB048

Latitude: 62.1283

Longitude: 141.906

Quadrangle: NBA-2

Location description and accuracy:

Best location: Richter and Jones, 1973, USGS 1-749; location given is confluence of Glacier Creek and Gold Run Creek. Accurate within 1000 ft radius

Commodities:

Main: Au

Other:

Ore minerals: Gold 

Gangue minerals:

Geologic description:

Deposits consist of auriferous gravels containing subrounded shale and graywacke clasts 

and some well-rounded lava and diorite clasts. Two placer deposits described in USGS B 

622: one is 150 ft by 15 ft with 4.5-to 5-ft-deep gravel and one is a 500 ft by 40 ft section 

of frozen gravels running 11 to 15 ft deep. Top 1 to 4 ft of rippable bedrock was also 

sluiced. The lava and diorite clasts in the stream gravels appear to have been derived 

from Tertiary gravels capping Gold Hill to southeast of placer area.

Alteration:

Age of mineralization:

Deposit model:

Placer: stream, bench

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: Yes; small 

Site Status: Active

Page 97
Alaska Resource Data File NB048

Workings/exploration:

Type of workings: surface. Intermittent mining since discovery in 1913.

Production notes:

Production included in Chisana district; see Bonanza Creek area (NB050)

Reserves:

Additional comments:

Contributor to Chisana district production of placer gold. Gold has also been noted downstream from Gold Run, on Glacier and Chavolda Creeks, though not in significant 

amounts

References:

Brooks, 1914, USGS B 592, p.309-320; Brooks, 1915, USGS B 622, p. 218-219; Brooks, 

1916, USGS B 642, p. 62; Smith and others, 1930, USGS B 836, p. 41; Smith and others, 

1942, USGS B 926-A, p. 53; Moffit, 1954, USGS B 989-D, p. 199; Cobb, 1973, USGS B 

1374, p. 115; Richter and Jones, 1973, USGS 1-749; Richter and others, 1975, USGS MF655K, loc. 63; Richter and Matson, 1972, USGS MF-422, Iocs. 56, 57 58, 59

Primary reference:

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H.

Last report date: 2/4/97

Page 98
Alaska Resource Data File NB049

Site name(s): Unnamed

Site type: Occurrence 

ARDFno.: NB049 

Latitude: 62.113 

Longitude: 141.817

Quadrangle: NB A-2

Location description and accuracy:

Best location: Richter and others, 1975, USGS MF-655K, loc. 43. Accurate within 500 ft 

radius.

Commodities:

Main: Zn, Pb, Cu, Ag

Other:

Ore minerals: Sphalerite, galena, chalcopyrite 

Gangue minerals:

Geologic description:

Quartz carbonate veins containing sphalerite, galena, and minor chalcopyrite in JurassicCretaceous argillite; silver present in unknown amount.

Alteration:

Age of mineralization:

Deposit model:

Lode; vein

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Type of workings: surface

Production notes:

Page 99
Alaska Resource Data File NB049

Reserves:

Additional comments:

Little data available on this site

References:

Richter and Jones, 1973, USGS 1-749; Richter and others, 1975, USGS MF-655K, loc.

43.

Primary reference: Richter and others, 1975, USGS MF-655K 

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H. 

Last report date: 2/7/97

Page 100
Alaska Resource Data File NB050

Site name(s): Bonanza Creek area; includes Bonanza Cr., Little Eldorado 

Cr., Skookum Cr., Coarse Money Cr., Snow Gulch

Site type: Mine 

ARDFno.: NB050

Latitude: 62.105

Longitude: 141.827

Quadrangle: NBA-2

Location description and accuracy:

Best location: Richter and Jones, 1973, USGS 1-749. Area contains productive placers at 

the headwaters of Bonanza Cr. draining the northeast side of Gold Hill. Accurate within 

1000 ft radius.

Commodities:

Main: Au, Ag

Other:

Ore minerals: Native gold, native silver 

Gangue minerals: Concentrates contain native copper, galena, cinnabar, molybdenite

Geologic description:

Host material is auriferous gravel. Stream, bench, and old channel gravels range from 2 

to 12 ft in depth, ave. 4 to 5.5 ft. Gold in stream placers was on and in top 1 to 2.5 ft of 

rippable bedrock. Gravels are thin, heterogeneous, and angular with locally abundant 

boulders.

Alteration:

Age of mineralization:

Deposit model:

Placer: stream, bench, buried channel

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

39a

Production Status: Yes; small 

Site Status: Active

Page 101
Alaska Resource Data File NB050

Workings/exploration:

Attempt was made at drift mining on upper Bonanza Creek. Report of 85 ft shaft with 25 

ft drift dug into old channel without discovering paying ground. Many of the gravels 

were frozen locally. Current condition unknown. Fineness values between 791 and 818, 

(reported in USGS B 989, p. 200 as assay value of 16.35 to 16.90 dollars/oz, with Au at 

20.67 dollars/oz). Type of workings: chiefly surface. Intermittent mining since discovery 

in 1913.

Production notes:

Au: est. 50,000 oz 1913-1959. Production in the district was dominated by Bonanza and 

Little Eldorado Creeks. Production data are for entire Chisana District. Most mining was 

between 1913 and 1915, when about half of the district's total production took place; production since 1940 has been minor.

Reserves:

Additional comments:

Small-scale placer mining and prospecting has also taken place on Chathenda Creek and 

its tributaries, including an attempt at drift mining on Dry Gulch (now called Salt Creek). 

Production, if any, was probably not significant

References:

Richter and Matson, 1972, USGS MF-422, locs.60, 61, 62, 63, 64: Richter and others, 

1975, USGS MF-655K, loc. 65; Richter and Jones, 1973, USGS 1-749; Moffit, 1954, 

USGS B 989-D, p. 196-200,203; Moffit, 1943, USGS B 933, p.50, 170-174; Brooks, 

1921, USGS B 714, p.84; Brooks, 1915, USGS B 622, p. 202-204, 208-216, 222; Richter 

and Matson, 1970, USGS OF 397; Capps, 1916, USGS B 630, p.92-94, 115, 119.

Primary reference: Moffit, 1954, USGS B 989-D, p. 196-200, 203 

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H. 

Last report date: 1/30/97

Page 102
Alaska Resource Data File NB051

Site name(s): Chathenda Creek; Johnson Creek

Site type: Prospect 

ARDFno.: NB051

Latitude: 62.081

Longitude: 141.912

Quadrangle: NBA-2

Location description and accuracy:

Best location: Richter and Jones, 1973, USGS 1-749; prospect is shown near fault in SW 

1/4 of sec. 34, T. 4 N., R. 19E. Same site as USGS MF-655K, loc. 39. On Chathenda 

Creek about 1 1/2 mi below mouth of Bonanza Creek. Accurate within 500 ft radius

Commodities:

Main: Au; Cu

Other:

Ore minerals: Pyrite, chalcopyrite, marcasite 

Gangue minerals: Quartz

Geologic description:

Locally gold-bearing quartz-pyrite veins in a zone of mineralized volcanic and diorite 

country rocks up to 10 ft wide; zone strikes N 65 W, dips 78 SW.

Alteration:

Age of mineralization:

Deposit model:

Lode: vein

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Several open cuts and two short tunnels. 0.01 oz/ton Au, 0.10 oz/ton Ag, reported by Pilgrim, 193 IB. Type of workings: surface and underground

Page 103
Alaska Resource Data File NB051

Production notes: 

Reserves:

Additional comments:

A number of small gold-bearing quartz-pyrite lodes occur in mineralized volcanic country 

rock (Chisana Formation of Cretaceous age) on the n side of Chathenda Creek. By 1940 a 

large group of claims had been staked but apparently none were successful in locating ore 

quality material

References:

Capps, 1916,USGSB630, p. 92-94, 114-115, 119; Moffit, 1943, USGS B 933-B, p. 

164-165; Richter and Matson, 1970, USGS OF 397, loc. 2; Richter and Jones, 1973, 

USGS 1-749; Richter and others, 1975, USGS MF-655K, Iocs. 39, 40, 41; Pilgrim, 1931, 

Report on cooperation between the Territory of Alaska andthe United States in making 

mining investigations and in inspection of mines for the biennium ending March 31, 

1931, p. 66-68

Primary reference:

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H.

Last report date: 1/31/97

Page 104
Alaska Resource Data File NB052

Site name(s): Johnson Creek

Site type: Prospect 

ARDFno.: NB052 

Latitude: 62.112 

Longitude: 141.625

Quadrangle: NBA-2

Location description and accuracy:

Best location: Richter and Jones, 1973, USGS 1-749; N 1/2 of SW 1/4, Sec. 19, T.4 N., 

R.21 E. Accurate within 1000 ft radius

Commodities:

Main: Cu; Mo

Other: Au

Ore minerals: Pyrite, chalcopyrite 

Gangue minerals:

Geologic description:

Disseminated pyrite and chalcopyrite in small diorite/granodiorite stock of Cretaceous age 

and surrounding metamorphosed country rock. Stock intrudes Upper Jurassic to Lower 

Cretaceous hornfelsed argillite* /

Alteration:

Hornfels

Age of mineralization:

Cretaceous

Deposit model:

Lode: porphyry

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive 

Workings/exploration:

Page 105
Alaska Resource Data File NB052

Assays show 0.15% Cu and less than 0.01% Mo (USGS MF-655K, loc. 44). Type of 

workings: surface

Production notes: 

Reserves:

Additional comments:

See also: Carl Creek (NB053)

References:

Richter and Matson, 1970, USGS OF 397, loc. 3, samples 434, 435; Richter and Jones, 

1973, USGS 1-749; Richter and others, 1975, USGS MF-655K, loc. 44; Hollister and others, 1975, CIM BULL, V.68, No. 756, p. 108

Primary reference: Richter and Matson, 1970, USGS OF 397, loc 3. 

Reporter(s): Leonard, K.R. (Elliott, R.L.); Richter, D.H. 

Last report date: 2/4/97

Page 106
Alaska Resource Data File NB053

Site name(s): Carl Creek

Site type: Prospect 

ARDFno.: NB053 

Latitude: 62.049 

Longitude: 141.586

Quadrangle: NB A-2

Location description and accuracy:

Two altered areas of about 100 m by 200 m each lie within 1 mi radius of lat-long coordinates. Best location: Richter and Jones, 1973, USGS 1-749; N of* Carl Creek; within 500 

ft radius

Commodities: 

Main: Cu

Other: Mo; Au; Ag 

Ore minerals: Pyrite, chalcopyrite 

Gangue minerals:

Geologic description:

Pyrite and chalcopyrite in quartz veinlets and in disseminations in 111 m.y.-old biotitehornblende granodiorite and biotite-quartz monzonite that intrude volcanic rocks of the 

Upper Cretaceous Chisana Formation.

Alteration:

Sericite

Age of mineralization:

Cretaceous

Deposit model:

Stockwork, porphyry

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

17 Porphyry Cu

Production Status: No 

Site Status: Inactive

Page 107
Alaska Resource Data File NB053

Workings/exploration:

Average grade from surface sampling: 0.10% Cu, all samples below 1.5% Cu, and less 

than 0.01% Mo (Richter and others, 1975, USGS MF-655-K, loc. 45 and 46).

Production notes: 

Reserves:

Additional comments:

One of 8 porphyry copper deposits which together make up the known principal mineral 

resource potential of the Nabesna quadrangle; see also Horsfeld (NB059), Bond Creek 

(NB032), Orange Hill NB024), and Baultoff (NB060) deposits.

References:

Richter and Matson, 1970, USGS OF 397, Area 4, 5; Richter and Jones, 1973, USGS I749; Richter and others, 1975, USGS MF-655K, loc. 45, 46; Hollister and others, 1975, 

CEVI B, v. 68, no. 756, p. 108

Primary reference:

Reporter(s): Leonard, K.R.; Elliott, R.L.; Nokleberg, W.J.; Richter, D.H.

Last report date: 1/28/97

Page 108
Alaska Resource Data File NB054

Site name(s): Sulzer; Cosmopolitan Group; O'hara Property 

Site type: Prospect 

ARDFno.: NB054

Latitude: 62.2006 

Longitude: 141.461

Quadrangle: NB A-l

Location description and accuracy:

Best location: Richter and others, 1973, USGS 1-807, loc. 1; ridge between forks of the 

Snag River. Accurate within 100 ft. radius

Commodities:

Main: Cu

Other:

Ore minerals: Chalcopyrite, bornite, malachite. 

Gangue minerals:

Geologic description:

Malachite in fractures, amygdules, and volcanic breccias in amygdaloidal basalt flows of 

the Triassic Nikolai Greenstone. Tunnel was driven in a northwest- trending fracture 

zone at the contact between a flow breccia and an overlying amygdaloidal basalt flow.

Alteration:

Age of mineralization:

Late Triassic

Deposit model:

Massive sulfide

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

24b Besshi massive sulfide

Production Status: No 

Site Status: Inactive 

Workings/exploration:

Page 109
Alaska Resource Data File NB054

Explored by open cuts and 2 adits, one of which was 87 ft long; reported caved in 1940. 

Surface and underground workings.

Production notes: 

Reserves:

Additional comments:

Nikolai Greenstone hostrock is known for its anomalous Cu content.

References:

Moffit, 1954, USGS Bull. 989-D, p. 204-205; Matson and Richter, 1971, USGS OFR 

471, p. 10, loc. 1; Richter and others, 1973, USGS 1-807, loc. 1; Richter and others, 

1975, USGS MF-655K, loc. 47; Pilgrim, E.R., 1931, White River Precinct, Snag River 

area in Stewart, B.C., Report on cooperation between the territory of Alaska and the 

United States in making mining investigations and in inspection of mines for the Biennium ending March 31, 1931, p. 74-76

Primary reference: Moffit, 1954, USGS B 989-D, p. 204-205 

Reporter(s): Leonard, K.R.; Elliott, R.L.; Nokleberg, W.J.; Richter, D.H. 

Last report date: 1/28/97

Page 110
Alaska Resource Data File NB055

Site name(s): Reynolds; Butte Creek Copper Group

Site type: Prospect 

ARDFno.: NB055

Latitude: 62.1789 

Longitude: 141.426

Quadrangle: NB A-l

Location description and accuracy:

Best location: Richter and others, 1973, USGS 1-807, loc. 2. Accurate within 100 ft radius

Commodities:

Main: Cu

Other:

Ore minerals: Bornite, chalcocite, malachite 

Gangue minerals: Specularite, calcite

Geologic description:

Small veins of bornite, chalcocite, specularite, malachite, and calcite in amygdaloidal basalt flows of the Triassic Nikolai Greenstone; near contact between Greenstone and interbedded limestone and shale.

Alteration:

Age of mineralization:

Deposit model:

Lode: volcanogenic

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Chip sample across 5 ft of Fe-stained basalt (USGS OF 471, sample 131) assayed 50 ppm 

B, 150 ppm Cr, 150 ppm Cu, 70 ppm Ni, 200 ppm V and traces of Au, Ag, Mo and Zn.

Page 111
Alaska Resource Data File NB055

Type of workings: surface. 

Production notes: 

Reserves:

Additional comments:

See also: Sulzer (NB054)

References:

Moffit, 1954, USGS B 989-D, p. 204-205; Matson and Richter, 1971, USGS OF 471, p. 

10, loc. 2; Richter and others, 1973, USGS 1-807, loc. 2; Richter and others, 1975, USGS 

MF-655K, loc. 48; Pilgrim, E.R., 1931, White River Precinct,Snag River area in Stewart, 

B.D., Report on cooperation between the Territory of Alaska and the United States in 

making mining investigations and in the inspection of mines for the biennium ending 

March 31, 1931, p 75

Primary reference: Moffit, 1954, USGS B 989-D 

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H. 

Last report date: 2/5/97

Page 112
Alaska Resource Data File NB056

Site name(s): Unnamed 

Site type: Occurrence 

ARDFno.: NB056 

Latitude: 62.1506 

Longitude: 141.306

Quadrangle: NB A-l

Location description and accuracy:

Best location: Richter and others, 1973, USGS 1-807, loc. 3. Accurate within 100 ft radius

Commodities:

Main: Cu

Other:

Ore minerals: Chalcopyrite 

Gangue minerals: Quartz, pyrite

Geologic description:

Massive quartz vein containing minor pyrite and chalcopyrite in marine volcaniclastic 

rocks of Permian age.

Alteration:

Age of mineralization:

Deposit model:

Lode; vein

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Type of workings: surface

Production notes:

Page 113
Alaska Resource Data File NB056

Reserves: 

Additional comments:

References:

Richter and others, 1973, USGS 1-807, loc. 3; Richter and others, 1975, USGS MF-655K, 

loc. 49.

Primary reference: Richter and others, 1973, USGS 1-807 

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H. 

Last report date: 2/7/97

Page 114
Alaska Resource Data File NB057

Site name(s): Unnamed

Site type: Prospect 

ARDFno.: NB057 

Latitude: 62.0828 

Longitude: 141.25

Quadrangle: NB A-l

Location description and accuracy:

Best location: Richter and others, 1973, USGS 1-807, loc. 5. Accurate within 100 ft radius

Commodities:

Main: Cu

Other:

Ore minerals: Chalcopyrite 

Gangue minerals: Pyrite

Geologic description:

Disseminated pyrite and minor chalcopyrite in small diorite stock that intrudes Cretaceous 

or Jurassic hornfelsed argillite

Alteration:

Altered area 100 m by 300 m, principally of limonite staining from oxidation of sulfides

Age of mineralization:

Deposit model:

Lode: porphyry

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Type of workings: surface

Page 115
Alaska Resource Data File NB057

Production notes: 

Reserves:

Additional comments:

See also: Baultoff (NB060), Horsfeld (NB059)

References:

Richter and Matson, 1972, USGS MF-422, loc. 40; Richter and others, 1973, USGS I807, loc. 5; Richter and others, 1975, USGS MF-655K, loc. 50.

Primary reference: Richter and others, 1973, USGS 1-807, loc. 5. 

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H. 

Last report date: 2/4/97

Page 116
Alaska Resource Data File NB058

Site name(s): Unnamed 

Site type: Prospect 

ARDFno.: NB058 

Latitude: 62.0561 

Longitude: 141.256

Quadrangle: NB A-l

Location description and accuracy:

Best location: Richter and others, 1973, USGS 1-807, loc. 6. Accurate within 100 ft radius

Commodities:

Main: Cu

Other:

Ore minerals: Chalcopyrite 

Gangue minerals: Quartz

Geologic description:

2-ft-wide quartz vein containing chalcopyrite in volcanic breccia of the Chisana Formation of Cretaceous age.

Alteration:

Age of mineralization:

Deposit model:

Lode: vein

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Grab sample of quartz vein assayed: 30 ppm Ag, 0.04 ppm Au, 10,000 ppm Cu, 7000 

ppm Pb, 700 ppm Zn (USGS OF 471, sample 153). Type of workings: surface

Page 117
Alaska Resource Data File NB058

Production notes: 

Reserves: 

Additional comments:

References:

Matson and Richter, 1971, USGS OF 471, sample 153; Richter and others, 1973, USGS 

1-807, loc. 6; Richter and others, 1975, USGS MF-655K, loc. 51

Primary reference: Richter and others, 1973, USGS 1-807 

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H. 

Last report date: 2/7/97

Page 118
Alaska Resource Data File NB059

Site name(s): Horsfeld 

Site type: Prospect 

ARDFno.: NB059 

Latitude: 62.0481 

Longitude: 141.214

Quadrangle: NB A-l

Location description and accuracy:

Best location: Richter and others, 1973, USGS 1-807, loc.7. Accurate within 100 ft radius

Commodities: 

Main: Cu

Other: Mo; Au; Ag 

Ore minerals: Pyrite, chalcopyrite 

Gangue minerals: Quartz

Geologic description:

Pyrite and chalcopyrite in quartz veinlets and disseminations in monzonite and monzonite 

porphyry of the Cretaceous Klein Creek batholith, which intrudes Cretaceous and Jurassic 

marine sedimentary rocks

Alteration:

Argillie, propylitic. Central altered zone 200 m by 700 m characterized by K-feldspar, actinolite and magnetite.

Age of mineralization:

Cretaceous

Deposit model:

Porphyry

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

17 Porphyry Cu

Production Status: No 

Site Status: Inactive

Page 119
Alaska Resource Data File NB059

Workings/exploration:

Average grade from surface sampling: 0.10% Cu (all samples were below 0.5% Cu) and 

less than 0.10% Mo (Richter and others, 1975, USGS MF-655K, loc. 52). Au and Ag detected in analysis (Matson and Richter,, 1971, USGS OF 471, samples 148, 149). Type of 

workings: surface

Production notes: 

Reserves:

Additional comments:

One of 8 porphyry copper deposits which make up the known principal potential mineral 

resource of the Nabesna quadrangle.

References:

Matson and Richter, 1971, USGS OF 471, loc. 5, samples 148, 149; Richter and others, 

1975, USGS MF-655K, loc. 52; Richter and others, 1973, USGS 1-807, loc. 7; Hollister 

and others, 1975, CIM B v. 68 No. 756, p. 108

Primary reference: Richter and others, 1973, USGS 1-807 

Reporter(s): Leonard, K.R.; Elliott, R.L.; Nokleberg, W.J.; Richter, D.H. 

Last report date: 1/28/97

Page 120
Alaska Resource Data File NB060

Site name(s): Baultoff 

Site type: Prospect 

ARDFno.: NB060 

Latitude: 62.1106 

Longitude: 141.212

Quadrangle: NB A-l

Location description and accuracy:

Best location: Richter nd others, 1973, USGS 1-807, loc. 4. Accurate within 100 ft. radius

Commodities: 

Main: Cu

Other: Mo, Ag, Au 

Ore minerals: Pyrite, chalcopyrite 

Gangue minerals: Quartz, sericite, albite, actinolite

Geologic description:

Disseminated pyrite and chalcopyrite in mafic hornblende diorite of Cretaceous age. Altered area up to 1,000 by 2,000 m containing gypsum, 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. NW-trending fault brings mineralized rock in contact with barren volcanics to east of prospect.

Alteration:

Potassic, propylitic; extensive. Locally gypsiferous alteration composed of central altered 

zone 400 m by 1000 m with chlorite,sericite, and albite cut by late stage anhydrite veins. 

Outer altered zones characterized by intense sericitization and pyritization.

Age of mineralization:

Cretaceous

Deposit model:

Stockwork, porphyry

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

17 Porphyry Cu

Page 121
Alaska Resource Data File NB060

Production Status: No 

Site Status: Inactive

Workings/exploration:

Average grades from surface sampling: 0.10% Cu, with all samples below 0,25% Cu 

and less than 0.01% Mo, Au and Ag also present (Richter and others, 1975, USGS MF655K, loc. 53). Surface workings.

Production notes:

Reserves:

Estimated 240 million tonnes of 0.2% Cu and <0.01% Mo; trace Au.

Additional comments:

One of 8 known porphyry copper deposits which make up the principal mineral resource 

potential of Nabesna quadrangle. See also: Orange Hill(NB024), Bond Creek(NB032), 

Carl Creek(NB053), Horsfeld(NB059).

References:

Matson and Richter, 1971, USGS OF 471, p. 10, loc. 4, samples 138, 139; Richter and 

others, 1973, USGS 1-807, loc. 4; Richter and others, 1975, USGS MF-655K, loc. 53; 

Hollister and others, 1975, CM B, v. 68, no. 756, p. 110;

Primary reference: Richter and others, 1973, USGS 1-807

Reporter(s): Leonard, K.R. (Elliott, R.L.); Nokleberg, W.J.; Richter, D.H.

Last report date: 1/27/97

Page 122
Alaska Resource Data File NB061

Site name(s): Unnamed 

Site type: Occurrence 

ARDFno.: NB061 

Latitude: 62.0603 

Longitude: 141.181

Quadrangle: NB A-l

Location description and accuracy:

Best location: Richter and others, 1973, USGS 1-807, loc. 8. Accurate within 100 ft radius

Commodities:

Main: Cu, Mo, Au

Other:

Ore minerals: Chalcopyrite, pyrite 

Gangue minerals:

Geologic description:

Disseminated pyrite and chalcopyrite in small stock of diorite porphyry of CretaceousTertiary age that intrudes Jurassic-Cretaceous marine sedimentary rocks.

Alteration:

Limonite-stained altered area covers area 50 by 100 meters.

Age of mineralization:

Deposit model:

Lode: porphyry

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Average grade from surface sampling: <0.10% Cu and <0.01% Mo, gold reported present, but no assay data given (USGS MF-655K, loc. 54). Type of workings: surface.

Page 123
Alaska Resource Data File NB061

Production notes: 

Reserves:

Additional comments:

The small stock at this location may be a marginal facies of the Klein Creek batholith

References:

Matson and Richter, 1971, USGS OF 471, sample 145; Richter and others, 1975, USGS 

MF-655K, loc. 54; Richter and others, 1973, USGS 1-807, loc. 8

Primary reference: Richter and others, 1973, USGS 1-807 

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H. 

Last report date: 2/10/97

Page 124
Alaska Resource Data File NB062

Site name(s): Unnamed

Site type: Occurrence 

ARDFno.: NB062 

Latitude: 62.0811 

Longitude: 141.125

Quadrangle: NB A-1

Location description and accuracy:

Best location: Richter and others, 1973, USGS 1-807, loc. 10. Accurate within 100 ft radius

Commodities:

Main: Pb, Ag, Au, Cu

Other:

Ore minerals: Galena, chalcopyrite, tetrahedrite 

Gangue minerals: Quartz, barite

Geologic description:

Quartz-barite veins, in Upper Paleozoic marine argillite, carrying galena, chalcopyrite, 

tetrahedrite; gold and silver reported in assay.

Alteration:

Age of mineralization:

Deposit model:

Lode: vein

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Sample of quartz-barite vein assayed: 5 ppm Ag, 0.4 ppm Au, 300 ppm Cu, 7000 ppm Pb, 

7000 ppm Zn (USGS OF 471, sample 141). Type of workings: surface.

Page 125
Alaska Resource Data File NB062

Production notes: 

Reserves: 

Additional comments:

References:

Matson and Richter, 1971, USGS OF 471, sample 141; Richter and others, 1973, USGS 

1-807, loc. 10; Richter and others, 1975, USGS MF-655K, loc. 55

Primary reference: Richter and others, 1973, USGS, 1-807 

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H. 

Last report date: 2/10/97

Page 126
Alaska Resource Data File NB063

Site name(s): Unnamed

Site type: Occurrence 

ARDFno.: NB063 

Latitude: 62.0783 

Longitude: 141.067

Quadrangle: NB A-l

Location description and accuracy:

Best location: Richter and others, 1973, USGS 1-807, loc. 9. Accurate within 100 ft radius

Commodities:

Main: Cu, Ag

Other:

Ore minerals: Chalcopyrite 

Gangue minerals: Quartz, calcite

Geologic description:

Quartz-calcite veins containing minor chalcopyrite in small quartz monzonite stock of 

Cretaceous age that intrudes Permian volcanic country rock.

Alteration:

Age of mineralization:

Deposit model:

Lode: vein

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992): 

Production Status: No 

Site Status: Inactive

Workings/exploration:

Grab sample of quartz-calcite vein assayed: 15000 ppm Cu, 700 ppm Cr, 150 ppm Ni, 

200 ppm Zn, 300 ppm V, 15 ppm B, 7 ppm Ag (USGS OF 471, sample 143). Type of 

workings: surface

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Alaska Resource Data File NB063

Production notes: 

Reserves: 

Additional comments:

References:

Matson and Richter, 1971, USGS OF 471, samples 142, 143); Richter and others, USGS 

1-807, loc. 9: Richter and others, 1975, USGS MF-655K, loc. 56

Primary reference: Richter and others, 1973, USGS, 1-807 

Reporter(s): Leonard, K.R.; Elliott, R.L.; Richter, D.H. 

Last report date: 2/10/97

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Alaska Resource Data File NB064

Site name(s): Garden Hills

Site type: Prospect 

ARDFno.: NB064 

Latitude: 62.3 

Longitude: 141.2

Quadrangle: NBB-1

Location description and accuracy:

Best location: Richter and others, 1975, USGS MF-655K. Accuracy unknown.

Commodities:

Main: Cr

Other: Pt group 

Ore minerals: Chromite 

Gangue minerals:

Geologic description:

Disseminated chromite in serpentinized peridotite.

Alteration:

Age of mineralization:

Deposit model:

Podiform chromite

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

8a

Production Status: 

Site Status:

Workings/exploration:

None

Production notes:

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Alaska Resource Data File NB064

Reserves:

Additional comments:

Discovered 1984

References:

MILS #0020780128; Foley and others, 1985, USBM OFR 97-85, p. 23.

Primary reference: Foley and others, 1985, USBM OFR 97-85 

Reporter(s): D. Singer; Richter, D.H. 

Last report date: 2/19/97

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Alaska Resource Data File NB065

Site name(s): Mirror Creek 

Site type: Occurrence 

ARDFno.: NB065 

Latitude: 62.524 

Longitude: 141.163

Quadrangle: NB B-l

Location description and accuracy:

Best location: Richter and others, 1975, USGS MF-655K, loc. 57. Accurate within 500 ft 

radius

Commodities:

Main: Cr

Other:

Ore minerals: Chromite 

Gangue minerals:

Geologic description:

Pods of massive chromite in alpine-type ultramafic body.

Alteration:

Age of mineralization:

Deposit model:

Podiform chromite

Deposit model number (After Cox and Singer, 1986 or Bliss, 1992):

8a

Production Status: No 

Site Status: Inactive

Workings/exploration:

No workings

Production notes:

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Alaska Resource Data File NB065

Reserves: 

Additional comments:

References:

Richter and others, 1975, USGS MF-655K, loc. 57; MILS 0020780126

Primary reference: Richter and others, 1975, USGS MF-655K 

Reporter(s): D. Singer; Richter, D.H. 

Last report date: 2/12/97

Page 132
Alaska Resource Data File References

References

Berg, H.C., and Cobb, E.H., 1967, Metalliferous lode deposits of Alaska: U.S. Geological Survey Bulletin 1246, 

254 p.

Bliss, J.D., ed., 1992, Developments in mineral deposit modeling: U.S. Geological Survey Bulletin 2004, 168 p.

Brooks, A.H., 1914, Lode mining in the Ketchikan region, Alaska: U.S. Geological Survey Bulletin 592-B, p. 

309-320.

Brooks, A.H., and others, 1915, Mineral resources of Alaska, report on progress of investigations in 1914: U.S. 

Geological Survey Bulletin 622, 380 p.

Brooks, A.H., and others, 1916, Mineral resources of Alaska, report on progress of investigations in 1915: U.S. 

Geological Survey Bulletin 642, 279 p.

Brooks, A.H., and others, 1921, Mineral resources of Alaska, report on progress of investigations in 1919: U.S. 

Geological Survey Bulletin 714, p. 84.

Capps, S.R., 1916, The Chisana-White River district, Alaska: U.S. Geological Survey Bulletin 630, 130 p.

Cobb. E.H., and Richter, D.H., 1980, Summaries of data on and list of references to metallic and selected nonmetallic mineral deposits in the Nabesna quadrangle, Alaska: U.S. Geological Survey Open-File Report 80 

927, 117 p.

Cobb, E.H., 1973, Placer deposits of Alaska: U.S. Geological Survey Bulletin 1374. 1 plate, 312 p.

Cox, D.P., and Singer, D.A., eds., 1986, Mineral deposit models: U.S. Geological Survey Bulletin 1992, 379 p.

Foley, J.Y., and others, 1985, Critical and strategic minerals investigation in Alaska; chromium: U.S. Bureau of 

Mines Open-File Report, 97-85, 1 sheet, 54 p.

Hollister, V.F., Anzalone, S.A., and Richter, D.H., 1975, Porphyry copper belts of southern Alaska and contiguous Yukon Territory: CIM Bulletin (Canadian Mining and Metallurgical Bulletin), v. 68, no. 756, p. 

104-112.

Lowe, P.C., and others, 1982, Geologic map of the Nabesna B-5 quadrangle, Alaska: U.S. Geological Survey 

Geologic Quadrangle Map GQ-1566, scale 1:63,360.

Matson, N.A., and Richter, D.H., 1971, Geochemical data from the Nabesna A-l quadrangle, Alaska: U.S. Geological Survey Open-File Report 71-0202, 10 p.

Matson, N.A., and Richter, D.H., 1971, Geochemical data from the Nabesna C-5 quadrangle, Alaska: U.S. Geological Survey Open-File Report 71-0204, 10 p.

Mendenhall, W.C., and Schrader, F. C., 1903, The mineral resources of the Mount Wrangell district, Alaska: U. 

S. Geological Survey Professional Paper 15, 71 p.

Moffit, F.H., and Knopf, Adolph, 1909, Mineral resources of the Nabesna-White River district: U.S. Geological 

Survey Bulletin 379-D, p. 161-180.

Moffit, F.H., 1938, The Suslota Pass district, upper Copper River region, Alaska: U.S. Geological Survey Bulletin 844-C, p. 137-162.

Moffit, F.H., 1938, Geology of the Slana-Tok district, Alaska: U.S. Geological Survey Bulletin 904 54 p.

Page 133
Alaska Resource Data File References

Moffit, F. H., 1941, Geology of the upper Telling River district, Alaska: U.S. Geological 

Survey Bulletin 917-B, p. 115-157.

Moffit, F.H., 1943, Geology of the Nutzotin Mountains, Alaska, with a section on the igneous rocks, by R. C. 

Wayland, and Gold deposits near Nabesna, by R. C. Wayland, 1943: U.S. Geological Survey Bulletin 

933-B, p. 103-199.

Moffit, F.H., 1944, Mining in the northern Copper River region, Alaska: U.S. Geological Survey Bulletin 943-B, 

p. 25-47.

Moffit, F.H., 1954, Geology of the eastern part of the Alaska Range and adjacent area: U.S. Geological Survey 

Bulletin 989-D, p. 65-218.

Nelson, A.E., and others, 1952, Reconnaissance for radioactive deposits in eastern Alaska: U.S. Geological Survey Circular 348, p. 3.

Pilgrim, E. R., 1931, Nabesna Mining Corporation, Whitham Group, in Stewart, B.D., Report on cooperation between the territory of Alaska and the United States in making mining investigations and in inspection of 

mines for the biennium ending March 31, 1931, p. 60-62.

Pilgrim, E. R., 1931, Report on cooperation between the Territory of Alaska and the United States in making 

mining investigations and in inspection of mines for the biennium ending March 3 1, 1931, p. 66-68.

Pilgrim, E. R., 193 1, Alaska Nabesna Orange Hill copper claims, in Stewart, B.D., Report on cooperation between the Territory of Alaska and the United States in making mining investigations and in inspection of 

mines for the biennium ending March 31, 1931, p. 69-74.

Pilgrim, E.R., 1931, White River Precinct, Snag River area, in Stewart, B.D., Report on cooperation between the 

territory of Alaska and the United States in making mining investigations and in inspection of mines for 

the biennium ending March 31, 1931, p, 74-76.

Richter, D.H., 1964, Geology and mineral deposits of the Ahtell Creek area, Slana District, south-central Alaska: 

Alaska Division of Geological and Geophysical Surveys Geologic Report 6 , 1 sheet, scale 1:31,680, 17

PRichter, D.H., 1966, Geology of the Slana district on south-central Alaska: Alaska Division of Geological and 

Geophysical Surveys Geological Report 21, 3 sheets, scale 1:63,360, 36 p.

Richter, D.H., 1967, Geology of the upper Slana-Mentasta Pass area, south-central Alaska: Alaska Division of 

Geological and Geophysical Surveys Geological Report 30, 1 sheet, scale 1:63,360, 27 p.

Richter, D.H., 1970, A corundum occurrence in the eastern Alaska Range, Alaska: U.S. Geological Survey Professional Paper 700-C, p. C98-C102.

Richter, D.H., 1971, Reconnaissance geologic map, and section of the Nabesna A-3 quadrangle, Alaska: U.S. 

Geological Survey Miscellaneous Investigations Series Map 1-655, scale 1:63,360.

Richter, D.H., 1973, Reconnaissance geological map of the Nabesna A-l quadrangle, Alaska: U.S. Geological 

Survey Miscellaneous Investigations Series Map 1-789, scale 1:63,360.

Richter, D.H., 1975, Reconnaissance geologic map of the Nabesna B-3 quadrangle, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map 1-904, scale 1:63,360.

Richter, D.H., and Jones, D.L., 1973, Reconnaissance geologic map of the Nabesna A-2 quadrangle, Alaska: U. 

S. Geological Survey Miscellaneous Investigations Series Map 1-749, scale 1:63,360.

Page 134
Alaska Resource Data File References

Richter, D.H., and Matson, N.A., 1968, Distribution of gold and some base metals in the

Slana area, eastern Alaska Range, Alaska: U.S. Geological Survey Circular 593, 20 p.

Richter, D.H., and Matson, N.A., 1969, Geochemical data from the Nabesna A-3 quadrangle, Alaska: U.S. Geological Survey Open-File Report 69-223, 5 p., 1 sheet, scale 1:63,360.

Richter, D.H., and Matson, N.A., 1970, Geochemical data from the Nabesna A-2 quadrangle, Alaska: U.S. Geological Survey Open-File Report 70-275, 12 p., 1 sheet, scale 1:63,360.

Richter, D.H., and Matson, N.A., 1970, Geochemical data from the Nabesna A-4 quadrangle, Alaska: U.S. Geological Survey Open-File Report 70-276, 14 p., 1 sheet, scale 1:63,360.

Richter, D.H., and Matson, N.A., 1972, Metallic mineral resources map of the Nabesna quadrangle, Alaska: U.S. 

Geological Survey Miscellaneous Field Studies Map MF-422, scale 1:250,000.

Richter, D.H., and others, 1973, Reconnaissance geologic map of the Nabesna A-l quadrangle, Alaska: U.S. 

Geological Survey Miscellaneous Investigations Series Map 1-807, scale 1:63,360.

Richter, D.H., and others, 1975, Mineral resources map of the Nabesna quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-655-K, scale 1:250,000.

Richter, D.H., and others, 1976, Geologic map of the Nabesna C-4 quadrangle, Alaska: U.S. Geological Survey 

Geologic Quadrangle Map GQ-1303, scale 1:63,360.

Richter, D.H., and Schmoll, 1973, Geologic Map of the Nabesna C-5 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ- 1062, scale 1:63,360.

Smith, P.S., and others, 1933, Mineral resources of Alaska, report on progress of investigations in 1930: U.S. 

Geological Survey Bulletin 836, p. 41.

Smith, P.S., and others, 1934, Mineral resources of Alaska, report on progress of investigations in 1931: U.S. 

Geological Survey Bulletin 844, p.21.

Smith, P.S., and others, 1942, Mineral resources of Alaska, report on progress of investigations in 1939: U.S, 

Geological Survey Bulletin 926, p. 53.

Smith, P.S., 1941, Mineral industry of Alaska in 1939: U.S. Geological Survey Bulletin 926-A, p. 1-106. 

Smith, P.S., 1942, Mineral industry of Alaska in 1940: U.S. Geological Survey Bulletin 933-A, p. 1-102.

U.S. Bureau of Mines, 1995, Spatial data extracted from the Minerals Availability System/Minerals Industry Location System (MAS/MILS): U. S. Bureau of Mines Special Publication 12-95, CD-ROM.

U.S. Geological Survey, 1996, Descriptions of the fields used to report brief descriptions of mines, prospects, and 

mineral occurrences in Alaska and Hawaii: U.S. Geological Survey Open-File Report 96-79, 5 p.

Van Alstine, R.E., and Black, R.F., 1944, Mineral deposits at Orange, Hill, Alaska: U.S. Geological Survey 

Open-File Report 76, 1 sheet, 16 p.

Wayland, R.C., 1943, Gold deposits near Nabesna: U.S. Geological Survey Bulletin 933-B, p. 103-199.

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