Unnamed (near Columbia Glacier)

Occurrence in Alaska, United States with commodity Gold

Geologic information

Identification information

Deposit ID 10003456
MRDS ID A106213
Record type Site
Current site name Unnamed (near Columbia Glacier)

Geographic coordinates

Geographic coordinates: -147.03257, 61.09958 (WGS84)
Relative position Best location in literature is that placer gold occurs in T. 9 S, R. 10 W., of the Copper River Meridian. Could include various deposits of alluvial gravel on the slopes of Great Nunatak.
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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) -147.03257, 61.09958

Comments on the geologic information

  • Geologic Description = Placer gold is present in Quaternary alluvial gravels. The bedrock in the area is monotonous sequences of thin- to thick-bedded sandstone, siltstone, and mudstone of the Eocene and Paleocene Orca Group. Primary sedimentary features indicate deposition by turbidity currents (Winkler, 1992). A 0.1 cubic yard sample contained 0.0005 oz Au/cubic yard (Jansons and others, 1984).
  • Age = Quaternary

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Prince William Sound

Comments on the workings information

  • Workings / Exploration = A 0.1 cubic yard sample contained 0.0005 oz Au/cubic yard, indicating a low mineral development potential (Jansons and others, 1984).

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A106213
USGS Alaska Resource Data File ARDF AN160

Bibliographic references

  • Deposit

    Jansons, Uldis, Hoekzema, R.B., Kurtak, J.M., and Fechner, S.A., 1984, Mineral occurrences in the Chugach National Forest, Southcentral Alaska: U.S. Bureau of Mines Open-File Report 5-84, 218 p., 2 sheets, scale 1:250,000.

  • Deposit

    Winkler, G.R., 1992, Geologic map and summary geochronology of the Anchorage (1 degree x 3 degree) quadrangle, southern Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-2283, 1:250,000.

Comments on the references

  • Primary Reference = Jansons and others, 1984

General comments

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

Reporter information

Type Date Name Affiliation Comment
Reporter 30-JUL-1998 D.P. Bickerstaff U.S. Geological Survey