Shungnak Rivers

Past Producer in Alaska, United States with commodities Gold, Silver, Asbestos, Copper, Jade

Geologic information

Identification information

Deposit ID 10001169
MRDS ID A011867
Record type Site
Current site name Shungnak Rivers
Alternate or previous names Shingnek Creek

Geographic coordinates

Geographic coordinates: -157.23846, 67.03064 (WGS84)
Relative position Located in canyon between Bismark Mountain and Shungnak Mountain near confluence with Bismark Creek in T. 19 N., R. 7 E., Kateel River Meridian. Shown as locality 19 in Mayfield and Grybeck (1978). Accurate to within 1000 ft. (300 m).?
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Silver Secondary
Asbestos Secondary
Copper Secondary
Jade Secondary

Comments on the commodity information

  • Ore Material = Copper (native)
  • Ore Material = Silver (native)

Materials information

Materials Type of material
Asbestos Ore
Nephrite Ore
Copper Ore
Silver Ore

Mineral occurrence model information

Model code 119
USGS model code 39a
BC deposit profile C01. C02
Deposit model name Placer Au-PGE
Mark3 model number 54

Host and associated rocks

  • Host or associated Host
    Rock type Unconsolidated Deposit > Gravel

Nearby scientific data

(1) -157.23846, 67.03064

Comments on the geologic information

  • Geologic Description = Creek and bench placers. Creek gravels 1-3 ft. (0.3-1 m) deep in canyon; Au occurs in pockets in bedrock and lower 1 ft. (0.3 m) of gravel. Nephrite jade float along banks of river; nephrite and low-grade asbestos in greenstone and serpentine along river. Gold also occurs on false bedrock above Pleistocene till near confluence with Bismark Creek. Stream gravels are coarse, subangular with abundant boulders up to 3 ft. (1 m) in diameter.

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Shungnak

Comments on the production information

  • Production Notes = Intermittent production during the period 1894 to 1940. May have produced as much as 10,000 oz (311 kg) of gold (Fritts, 1970, p. 54-55).

Comments on the workings information

  • Workings / Exploration = Most of gravel is not frozen, in benches up to 25 ft. (9 m) above the river; prospect pits in gravel downstream from canyon did not reach bedrock; 40 ft. (13 m) drill hole in gravels below canyon did not reach bedrock (Reed, 1931, p. 15)

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A011867
USGS Alaska Resource Data File ARDF AR009

Bibliographic references

  • Deposit

    Anderson, Eskil, 1945, Asbestos and jade occurrences in the Kobuk River region, Alaska: Alaska Territorial Department of Mines Pamphlet 3-R, 48 p.

  • Deposit

    Anderson, Eskil, 1947, Mineral occurrences other than gold deposits in northwestern Alaska: Alaska Territorial Division of Mines Pamphlet 5-R, 48 p.

  • Deposit

    Fritts, C.E., 1970, Geology and geochemistry of the Cosmos Hills, Ambler River and Shungnak River Quadrangles, Alaska: Alaska Division of Geological and Geophysical Surveys Geological Report 39, 63 p., 4 sheets, scale 1:63,360.

  • Deposit

    Mayfield, C.F. and Grybeck, D., 1978, Mineral occurrences and resource map of the Ambler river quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-120I, 1 sheet, scale 1:250,000.

  • Deposit

    Reed, I.M., 1931, Report on the placer deposits of the upper Kobuk goldfields: Alaska Territorial Department of Mines Miscellaneous Report 37-1, 33 p.

  • Deposit

    Smith. P.S., 1913, The Noatak-Kobuk region, Alaska: U.S. Geological Survey Bulletin 536, 60 p.

Comments on the references

  • Primary Reference = Fritts, 1970

General comments

Subject category Comment text
Deposit Model Name = Placer
Deposit Other Comments = Concentrates mainly magnetite along with rare nuggets of copper and silver (Anderson, 1945, p. 24-46).

Reporter information

Type Date Name Affiliation Comment
Reporter 06-MAY-1997 K.R. Leonard U.S. Geological Survey
Reporter 06-MAY-1997 R.L. Elliott U.S. Geological Survey
Reporter 06-MAY-1997 J.M. Schmidt U.S. Geological Survey
Reporter 06-MAY-1997 S.W. Nelson U.S. Geological Survey