Crooked Creek

Past Producer in Alaska, United States with commodity Gold

Geologic information

Identification information

Deposit ID 10001925
MRDS ID A012759
Record type Site
Current site name Crooked Creek

Geographic coordinates

Geographic coordinates: -163.70025, 65.02739 (WGS84)
Relative position This placer mine comprises 3,500 feet of the channel of Crooked Creek, between an elevation of 350 and 450 feet; it that begins about one mile upstream from its mouth. Crooked Creek is a short, 2.3 mile long west tributary to Ophir Creek. The mouth of Crooked Creek is 7,500 feet upstream on Ophir Creek from the southern boundary of the Bendeleben quadrangle. This is locality 80 of Cobb (1972; MF 417; 1975; OFR 75-429).
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary

Comments on the commodity information

  • Gangue = topaz (from placer concentrate near mouth of the creek

Materials information

Materials Type of material
Gold Ore
Garnet Gangue
Magnetite Gangue
Topaz Gangue

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
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone

Nearby scientific data

(1) -163.70025, 65.02739

Comments on the geologic information

  • Geologic Description = Stream gravels of Crooked Creek merge with floodplain deposits of Ophir Creek where the paystreak was 250 feet wide, 6 feet thick, and contained 0.22 ounces Au per cubic yard (Collier and others, 1908; Smith and Eakin, 1911). The paystreak narrowed to 6 feet wide 0.25 mile upstream of the mouth. About three quarters of a mile above the mouth of Crooked Creek, the paystreak consisted of 5 feet of auriferous sandy clay mixed with limestone (marble) fragments; it was 20 feet wide and overlain by 6 feet of barren clay. At 1.25 miles above the mouth, the paystreak widened to 150 to 200 feet and consisted of auriferous yellow clay mixed with limestone (marble) boulders. Much of the mining in the two decades before WW II, including dredging (Cobb, 1975, OFR 75-429), probably took place here. Bedrock in the area is metasedimentary schist and marble of a Lower Paleozoic assemblage (Till and others, 1986).
  • Age = Quaternary; two or more cycles of placer development have occured in the area.

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 Council

Comments on the production information

  • Production Notes = Placer gold from lower Crooked Creek was both coarse and rounded as well as sharp and angular with quartz attached (Smith and Eakin, 1911). Collier and others (1908) also noted fragile and crystalline placer gold that suggests a local source.

Comments on the workings information

  • Workings / Exploration = Surface open-cut placer workings and dredging have taken place along this part of Crooked Creek.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A012759
USGS Alaska Resource Data File ARDF BN102

Bibliographic references

  • 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

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

  • 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 = Smith and Eakin, 1911

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