Olympic Creek

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

Geologic information

Identification information

Deposit ID 10000260
MRDS ID A010302
Record type Site
Current site name Olympic Creek
Related records 10258755

Geographic coordinates

Geographic coordinates: -161.22271, 59.33927 (WGS84)
Relative position Olympic Creek is a north tributary to Slate Creek, a north tributary to Goodnews River. This location is about 1 mile upstream of the confluence of Olympic and Slate Creeks and is the midpoint of placer workings mapped by Fechner (1988, fig. 5). It is locality 14 of Hoare and Cobb (1977) and of Cobb and Condon (1972).
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary
Platinum Secondary

Materials information

Materials Type of material
Gold 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 Plutonic Rock > Granitoid > Granite
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic)
    Rock unit name Gemuk Group
    Rock description Gemuk Group

Nearby scientific data

(1) -161.22271, 59.33927

Comments on the geologic information

  • Geologic Description = Placer gold mining was reported on Olympic Creek from 1926 to 1931 (Hoare and Cobb, 1977). Fechner (1988, fig. 5) showed the location of a 0.4-mile-long mining cut along the west side of the creek that appears to be in a bench setting. The mined area includes about 10,000 square feet in an upper pit and about 4,000 square feet in a lower pit; the total mined volume is estimated to have been 100,000 cubic yards (Fechner, 1988). As the average grade of the mined material was reported to be 0.04 ounce of gold per cubic yard (Reed, 1931), total production could have been about 4,000 ounces of gold, much more than the 169 ounces that Fechner (1988, p. 50) identified as reported production. The coarse, angular gravel contains granitic cobbles up to 2 feet across; it is 6 feet thick in the creek and about 20 feet thick on the bench. Fechner (1988) collected six, 0.1 cubic yard sediment samples along 3 miles of the Olympic Creek dainage. These samples contained a trace to 0.0045 ounce of gold per cubic yard; one of these samples from along the lower part of the creek, contained 600 ppb platinum. Bedrock in the area includes Paleozoic and Mesozoic sedimentary and volcanic rocks locally intruded by Upper Cretaceous to Lower Tertiary granitic rocks and Jurassic mafic/ultramafic plutonic rocks (Hoare and Coonrad, 1978).
  • Age = Quaternary.

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic

Comments on exploration

  • Status = Probably inactive

Mining district

District name Goodnews Bay

Comments on the production information

  • Production Notes = The total mined volume is estimated to have been 100,000 cubic yards (Fechner, 1988). As the average grade of the mined material was reported to be 0.04 ounce of gold per cubic yard (Reed, 1931), total production could have been about 4,000 ounces of gold. This is considered a maximum estimate. It is much more than the 169 ounces that Fechner (1988, p. 50) identified as reported production.

Comments on the workings information

  • Workings / Exploration = Fechner (1988, fig. 5) showed the location of a 0.4-mile-long mining cut along the west side of the creek that appears to be in a bench setting. The mined area includes about 10,000 square feet in an upper pit and about 4,000 square feet in a lower pit; the total mined volume is estimated to have been 100,000 cubic yards (Fechner, 1988).

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A010302
USGS Alaska Resource Data File ARDF GO019

Bibliographic references

  • Deposit

    Cobb, E.H., and Condon, W.H., 1972, Metallic mineral resources map of the Goodnews quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-447, scale 1:250,000.

  • Deposit

    Hoare, J.M., and Cobb, E.H., 1977, Mineral occurrences (other than mineral fuels and construction materials) in the Bethel, Goodnews, and Russian Mission quadrangles, Alaska: U.S. Geological Survey Open-File Report 77-156, 98 p.

  • Deposit

    Hoare, J.M., and Coonrad, W.L., 1978, Geologic map of the Goodnews and Hagemeister Island quadrangles region, southwestern Alaska: U.S. Geological Survey Open-File Report 78-9-B, two sheets, scale 1:250,000.

  • Deposit

    Fechner, S.A., 1988, Bureau of Mines mineral investigation of the Goodnews Bay mining district, Alaska: U.S. Bureau of Mines Open-File Report 1-88, 230 p.

  • Deposit

    Reed, I.M., 1931, Notes on the creeks in the Goodnews River gold area: Alaska Territorial Department of Mines, 3 p.

Comments on the references

  • Primary Reference = Fechner, 1988

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 20-MAR-2001 Travis L. Hudson Applied Geology