Coffee Creek

Past Producer in Alaska, United States with commodities Gold, Mercury

Geologic information

Identification information

Deposit ID 10001908
MRDS ID A012738
Record type Site
Current site name Coffee Creek
Related records 10208629

Geographic coordinates

Geographic coordinates: -164.70225, 65.31238 (WGS84)
Relative position Coffee Creek crosses the Nome-Taylor road at about mile 74 and again at almost mile 75. Placer mining took place for about 8,500 feet downstream from the Nome-Taylor road crossing at about mile 75. Coffee Creek merges with Quartz Creek to become Whelan Creek 10,000 feet downstream from the lower mine workings. Small tributaries to the mined section of Coffee Creek, including Dome Creek and Wonder Gulch (BN005), were mined adjacent to Coffee Creek and are included as part of this locality. Coffee Creek is location 45 of Cobb (1972; MF 417).
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Mercury Secondary

Materials information

Materials Type of material
Cerussite Ore
Cinnabar Ore
Gold Ore
Pyromorphite 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 Metamorphic Rock > Schist

Nearby scientific data

(1) -164.70225, 65.31238

Comments on the geologic information

  • Geologic Description = Up to 25 feet of muck covered, gold-bearing stream gravels were initially mined in 1901 here (Collier, 1902). The lower part of the mined drainage is cut into alluvial terrace gravels, the Kougarok gravel, (Hopkins, 1963) but most of the mined drainage is on low grade Lower Paleozoic metasedimentary bedrock (Till and others, 1986). Kougarok gravel carries small amounts of gold (Sainsbury and others, 1969; Sainsbury, 1975) but at least part of the gold in Coffee Creek appears to be derived from local bedrock sources. A residual placer contains angular, spongy, and bright gold in 4 to 7 feet of angular schist and quartz and adjacent weathered schist bedrock (Collier and others, 1908) in the headwaters of Wonder Gulch (BN005). Small amounts of cinnabar are present in placer concentrate from Coffee Creek and Wonder Gulch; cerussite and pyromorphite are also present in concentrate from Wonder Gulch (Anderson, 1947).
  • 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 Kougarok

Comments on the workings information

  • Workings / Exploration = Various combinations of hand, scraper, dozer, dragline, and sluice surface operations have taken place along 8,500 feet of the Coffee Creek drainage and the adjacent 1,000 feet of Dome Creek, and 1,500 feet of Wonder Gulch (Sainsbury and others, 1969). Early mining included winter underground drifting and summer sluicing (Cobb, 1975).

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A012738
USGS Alaska Resource Data File ARDF BN003

Bibliographic references

  • Deposit

    Collier, A.J., 1902, A reconnaissance of the northwestern portion of Seward Peninsula, Alaska: U.S. Geological Survey Professional Paper 2, 70 p.

  • Deposit

    Collier, A. J., Hess, F.L., Smith, P.S., and Brooks, A.H., 1908, The gold placers of parts of Seward Peninsula, Alaska, including the Nome, Council, Kougarok, Port Clarence, and Goodhope precincts: U.S. Geological Survey Bulletin 328, 343 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

    Hopkins, D.M., 1963, Geology of the Imuruk Lake area, Seward Peninsula, Alaska: U.S. Geological Survey Bulletin 1141-C, p. C1-C101.

  • Deposit

    Sainsbury, C.L., Kachadoorian, Reuban, Hudson, Travis, Smith, T.E., Richards, T.R., and Todd, W.E., 1969, Reconnaissance geologic maps and sample data, Teller A-1, A-2, A-3, B-1, B-2, B-3, C-1, and Bendeleben A-6, B-6, C-6, D-5, and D-6 quadrangles. Seward Peninsula, Alaska: U.S. Geological Survey Open-File Report 377, 49 p., 12 sheets, scale 1:63,360.

  • Deposit

    Cobb, E.H., 1975, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Bendeleben quadrangle, Alaska: U.S. Geological Survey Open-File Report 75-429, 123 p.

  • Deposit

    Till, A.B., Dumoulin, J.A., Gamble, B. ., Kaufman, D.S., and Carroll, P.I., 1986, Preliminary geologic map and fossil data, Soloman, Bendeleben, and southern Kotzebue quadrangles, Seward Peninsula, Alaska: U.S. Geological Survey Open-File Report 86-276, 10 p., 3 plates, scale 1:250,000.

  • Deposit

    Cobb, E.H., 1972, Metallic mineral resources map of the Bendeleben quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-417, 1 sheet, scale 1:250,000.

Comments on the references

  • Primary Reference = Cobb, 1975

General comments

Subject category Comment text
Deposit Model Name = Placer Au-PGE (Cox and Singer, 1986; model 39a)

Reporter information

Type Date Name Affiliation Comment
Reporter 15-MAR-1999 Travis L. Hudson Applied Geology