Upper Dahl Creek

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

Geologic information

Identification information

Deposit ID 10003076
MRDS ID A015601
Record type Site
Current site name Upper Dahl Creek
Related records 10184813

Geographic coordinates

Geographic coordinates: -156.86261, 66.9751 (WGS84)
Relative position The upper Dahl Creek placer mine extends along the creek from just below Wye Creek to just above Harry Creek. The coordinates are for the mine symbol at the confluence of Wye Creek. The deposit is in sections 3 and 10, T. 18 N., R. 9 E., of the Kateel River Meridian. Cobb (1972, MF-448), locations 13, 14.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Silver Secondary
Cadmium Secondary
Chromium Secondary
Copper Secondary
Jade Secondary

Comments on the commodity information

  • Ore Material = Silver (native)

Materials information

Materials Type of material
Gold 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 Associated
    Rock type Metamorphic Rock > Serpentinite
  • Host or associated Host
    Rock type Unconsolidated Deposit > Gravel

Nearby scientific data

(1) -156.86261, 66.9751

Comments on the geologic information

  • Geologic Description = At the upper Dahl Creek placer mine most of the gold lies on, or just above, bedrock, although some spongy gold occurs in black, soil-like overburden (A. Williams, unpublished data, 1998). The gold was most abundant near the mouth of Wye Creek. Creek gravels range from 5 to 25 feet thick. The gold is in the lower 1 to 2 feet of gravel as well as on bedrock; it is unevenly distributed and patchy, occurring in pockets. There is no continuous pay streak. The gold is reddish to brass yellow in color. Some of the nuggets were spongy and rare wire gold has been reported. Nuggets of considerable size have been recovered from the deposit. One nugget was worth about $65 in 1913 and had considerable greasy-looking milky quartz attached. A flat nugget worth over $600 was recovered just below Harry Creek. The gold was valued at $17.20 per ounce (Reed, 1931). Concentrates from the placers are predominately magnetite, along with some chromite and native copper. Nuggets of native silver up to 1 inch in diameter been reported in the concentrates. The silver carries a small amount of cadmium. (Smith, 1913). Nephrite boulders have been recovered during placer mining.? the upper Dahl Creek placer is in thawed ground. Bedrock is lower Paleozoic, black slate with quartz stringers, and schist which breaks into small, rectangular blocks. The joint faces on these blocks are commonly iron-stained. The dominant strike of the bedrock is perpendicular to the creek, forming natural riffles for catching gold. Holes sunk on some low benches on either side of the creek are in unconsolidated deposits up to 15 feet thick. Quartz veins cutting bedrock on these benches are 1 inch to 4 feet thick. Serpentinite near Dahl Creek around the confluence of Stockley Creek contains chrysotile and fibrous serpentine.
  • Age = Quaternary.

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 = Total production from the Dahl Creek placers (also see ARDF number SH002) is estimated to be 15,000 ounces to more than 17,000 ounces (Degenhart and others, 1978).

Comments on the workings information

  • Workings / Exploration = Gold was first discovered in 1898 and the claims were worked more or less continuously up to 1968. From the late 50's into the early 70's nephrite boulders were recovered and cut during the mining process. Early mining was done with shovels and sluice box. In the 1920's, hydraulic equipment was installed and used extensively around Wye Creek. In 1988 and 1989 NANA took jig samples from each of the claim blocks in an attempt to complete a patenting application on the claims.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A015601
USGS Alaska Resource Data File ARDF SH003

Bibliographic references

  • Deposit

    Brooks, A.H., 1909, The mining industry in 1908: U.S. Geological Survey Bulletin 379-A, p. 21-62.

  • Deposit

    Brooks, A.H., 1910, Mineral resources of Alaska, report on progress of investigations in 1909: U.S. Geological Survey Bulletin 442, 426 p.

  • Deposit

    Smith, P.S. and Eakin, H.M., 1911, Mineral resources of Alaska 1910: U.S. Geological Survey Bulletin 480, 333 p..

  • Deposit

    Brooks, A.H., 1912, The Alaska mining industry in 1911, in Brooks, A.H., and others, Mineral resources of Alaska, 1911: U.S. Geological Survey Bulletin 520, p. 17-44.

  • Deposit

    Brooks, A.H., 1914, Mineral resources of Alaska in 1913: U.S. Geological Survey Bulletin 592, p. 340-341.

  • Deposit

    Brooks, A.H., 1916, Antimony deposits of Alaska: U.S. Geological Survey Bulletin 649, 67 p.

  • Deposit

    Martin, G.C., 1919, Alaska Mining Industry in 1917: U.S. Geological Survey Bulletin 692, p. 11-42

  • Deposit

    Brooks, A.H., and Martin, G. C. 1921, The Alaska mining industry in 1919: U.S. Geological Survey Bulletin 714, p. 59-95.

  • Deposit

    Brooks, A.H., 1922, The Alaska mining industry in 1920: U.S. Geological Survey Bulletin 722-A, p. 1-74.

  • Deposit

    Brooks, A.H. and Capps, S.R., 1924, Mineral industry in Alaska, 1922: U.S. Geological Survey Bulletin 755, p. 1-56.

  • Deposit

    Brooks, A.H., 1925, Alaska's mineral resources and production, 1923: U.S. Geological Survey Bulletin 773, p. 3-52.

  • Deposit

    Smith, P.S., 1929, Mineral industry of Alaska in 1926: U.S. Geological Survey Bulletin 797, p. 1-50.

  • Deposit

    Smith, P.S., 1930, Mineral industry of Alaska in 1927: U.S. Geological Survey Bulletin 810-A, p. 1-64.

  • Deposit

    Smith, P.S., 1930, Mineral industry of Alaska in 1928: U.S. Geological Survey Bulletin 813, p. 1-72.

  • Deposit

    Smith, P.S., and Mertie, J.B., Jr., 1930, Geology and mineral resources of northwestern Alaska: U.S. Geological Survey Bulletin 815, 315 p.

  • Deposit

    Smith, P.S., 1932, Mineral industry of Alaska in 1929, in Smith, P.S., and others Mineral resources of Alaska, report on progress of investigations in 1929: U.S. Geological Survey Bulletin 824-A, p. 1-81.

  • Deposit

    Smith, P.S., 1933, Mineral industry of Alaska in 1930: U.S. Geological Survey Bulletin 836, p. 1-83.

  • Deposit

    Smith, P.S., 1933, Mineral industry in Alaska in 1931: U.S. Geological Survey Bulletin 844-A, p. 1-82.

  • Deposit

    Smith, P.S., 1934, Mineral industry of Alaska in 1932: U.S. Geological Survey Bulletin 857-A, p. 1-91.

  • Deposit

    Smith, P.S., 1934, Mineral industry of Alaska in 1933: U.S. Geological Survey Bulletin 864-A, p. 1-94.

  • Deposit

    Smith, P.S., 1936, Mineral industry in Alaska in 1934: U.S. Geological Survey Bulletin 868-A, p. 1-91.

  • Deposit

    Smith, P.S., 1937, Mineral industry in Alaska in 1935: U.S. Geological Survey Bulletin 880-A, p. 1-95.

  • Deposit

    Smith, P.S., 1938, Mineral industry of Alaska in 1936: U.S. Geological Survey Bulletin 897-A, p. 1-107.

  • Deposit

    Smith, P.S., 1939, Mineral industry of Alaska in 1937: U.S. Geological Survey Bulletin 910-A, p. 1-113.

  • Deposit

    Smith, P.S., 1939, Mineral industry of Alaska in 1938: U.S. Geological Survey Bulletin 917-A, p. 1-113.

  • 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., 1969, Geology and geochemistry in the southeastern part of the Cosmos Hills, Shungnak D-2 quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Geological Report 37, 35 p., 2 sheets, scale 1:48,000.

  • 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

    Cobb, E.H., 1972, Metallic mineral resources of the Shungnak quadrangle, Alaska: USGS Miscellaneous Field Studies Map MF-448, 1 sheet, scale 1:250,000.

  • Deposit

    Cobb, E.H., 1973, Placer deposits of Alaska: U.S. Geological Survey Bulletin 1374, 213 p.

  • Deposit

    Cobb, E.H., 1975, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in five quadrangles in west central Alaska (Hughes, Kotzebue, Melozitna, Selawik and Shungnak): U.S. Geological Survey Open-File Report 75-627, 58 p.

  • Deposit

    Cobb, E.H., 1977, Placer deposit map of central Alaska: U.S. Geological Survey Open-File Report 77-168B, 64 p., 1 map, scale 1:1,000,000.

  • Deposit

    Grybeck, D.J., 1977, Known mineral deposits of the Brooks Range, Alaska: US Geological Survey Open-File Report 77-166C, 41 p., 1 sheet, scale 1:1,000,000.

  • Deposit

    Degenhart, C.E., Griffis, R.J., McQuat, J.F., and Bigelow, C.G., 1978, Mineral studies of the western Brooks Range performed under contract to the U.S. Bureau of Mines, Contract #JO155089: U.S. Bureau of Mines Open-File Report 103-78, 529 p., 11 sheets.

  • 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

    WGM Staff, 1980, Non-fuel mineral resources of Alaska: Anchorage, Alaska, WGM, Inc. Unpublished report for Phillips Petroleum Company, 320 p. (Report held by NANA Regional Corporation, Anchorage, Alaska).

  • Deposit

    Coats, R.R., 1944, Asbestos deposits of the Dahl Creek area, Kobuk River district, Alaska: U.S. Geological Survey Open-File Report, 4 p.

  • Deposit

    Cobb, E.H., 1975, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in five quadrangles in west central Alaska (Hughes, Kotzebue, Melozitna, Selawik, Shungnak): U.S. Geological Survey Open-File Report 75-627, 58 p.

  • Deposit

    Moffit, F.H., 1927, Mineral industry in Alaska in 1925: U.S. Geological Survey Bulletin 792-A, p. 1-39.

  • Deposit

    Reed, I.M., 1931, Report on the placer deposits of the upper Kobuk goldfields: Alaska Territorial Department of Mines Miscellaneous Report 37-1, 57 p.

  • Deposit

    Saunders, R.H., 1953, Itinerary report of the Eagle and Shungnak district for the 1952 field season: Alaska Territorial Department of Mines Itinerary Report 195-44, 7 p.

  • Deposit

    Smith, P.S., 1930, Mineral industry of Alaska in 1928: U.S. Geological Survey Bulletin 813-A, p. 1-72.

  • Deposit

    Smith, P.S., 1933, Mineral industry of Alaska in 1930: U.S. Geological Survey Bulletin 836-A, p. 1-83.

  • Deposit

    Smith, P.S., 1933, Mineral industry of Alaska in 1931: U.S. Geological Survey Bulletin 844-A, p. 1-81.

  • Deposit

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

  • Deposit

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

  • Deposit

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

Comments on the references

  • Primary Reference = Smith, 1913; Reed, 1931

General comments

Subject category Comment text
Deposit Model Name = Placer Au-PGE (Cox and Singer, 1986; model 39a).
Deposit Other Comments = the gradient of Dahl Creek is approximately 150 feet per mile. Much of material collected as nephrite jade was serpentinite rather than nephrite. Best placer ground is worked out. The mine area is accessible by trail from Kobuk and is owned by NANA Regional Corp. Data on Dahl Creek are available by request from NANA Regional Corp.

Reporter information

Type Date Name Affiliation Comment
Reporter 16-DEC-99 Williams, Anita U.S. Geological Survey