Offield Creek

Past Producer in Alaska, United States with commodity Gold

Geologic information

Identification information

Deposit ID 10003248
MRDS ID A016068
Record type Site
Current site name Offield Creek
Related records 10111860

Geographic coordinates

Geographic coordinates: -166.00948, 65.30123 (WGS84)
Relative position Offield Creek is a south-flowing stream whose mouth is on the northeast shore of Grantley Harbor, 9.25 miles east of Teller. The creek is in the southeast corner of the Teller B-3 quadrangle and adjacent parts of the Teller B-2 quadrangle. Placer operations were apparently on upstream parts of the drainage at surface elevations of about 400 feet (Cobb and Sainsbury, 1972). This is locality 70 of Cobb and Sainsbury (1972). Cobb (1975) summarized relevant references under the name 'Offield Cr.'.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary

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

Nearby scientific data

(1) -166.00948, 65.30123

Comments on the geologic information

  • Geologic Description = Bedrock in the Offield Creek drainage is a schistose chlorite and mica schist assemblage that is locally intruded by small greenstone bodies (Sainsbury, 1972); the age of this assemblage is uncertain but it is probably Paleozoic. Although Cobb (1975) states that this creek has been extensively placer mined, primarily in the 1930s, Sainsbury and others (1969) did not show the location of placer workings. The character of the placer deposit has not been described.
  • 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 Port Clarence

Comments on the production information

  • Production Notes = Not known, primarily in the 1930's

Comments on the reserve resource information

  • Reserves = Not defined

Comments on the workings information

  • Workings / Exploration = Cobb (1975) states that this creek has been extensively placer mined.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A016068
USGS Alaska Resource Data File ARDF TE082

Bibliographic references

  • 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

    Sainsbury, C.L., 1972, Geologic map of the Teller quadrangle, Seward Peninsula, Alaska: U.S. Geological Survey Map I-685, 4 p., 1 sheet, scale 1:250,000.

  • Deposit

    Cobb, E.H., and Sainsbury, C.L., 1972, Metallic mineral resource map of the Teller quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-426, 1 sheet, scale 1:250,000.

  • Deposit

    Cobb, E.H., 1975, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Teller quadrangle, Alaska: U.S. Geological Survey Open-File Report 75-587, 130 p.

Comments on the references

  • Primary Reference = Cobb, 1975

General comments

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

Reporter information

Type Date Name Affiliation Comment
Reporter 10-MAY-1998 Travis L. Hudson Applied Geology