Prospect in Alaska, United States with commodities Silver, Gold

Geologic information

Identification information

Deposit ID 10308691
Record type Site
Current site name California

Geographic coordinates

Geographic coordinates: -160.59541, 55.17923 (WGS84)
Relative position This prospect is at an elevation of about 500 feet on southeastern Unga Island approximately 1 mile southeast of Apollo Mountain. The location is accurate to within 1,200 feet.
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Geographic areas

Country State
United States Alaska


Commodity Importance
Silver Primary
Gold Primary

Materials information

Materials Type of material
Pyrite Ore
Quartz Gangue


  • Alteration types are silicification and argillization.

Nearby scientific data

(1) -160.59541, 55.17923

Comments on the geologic information

  • Geologic Description = The California prospect consists of a system of multiple, 2-inch-wide, open-growth quartz veinlets in bleached, partly argillized felsic tuff containing disseminated iron oxide pseudomorphs of pyrite (Wilson and others, 1988). The hostrocks are part of the Eocene to Oligocene Popof volcanic rocks (Wilson and others, 1995). Battle Mountain Exploration Company (Ellis and Apel, 1990) traced the vein system southwest to the Heather Creek prospect (PM085). A rock sample collected at the California adit contained 2.19 ppm gold. Other samples collected between the California and Heather Creek prospects contained as much as 0.41 ppm gold, 100 ppm or more arsenic, and 1 ppm or more mercury.
  • Age = Eocene or younger.

Economic information

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Alaska Peninsula

Comments on the workings information

  • Workings / Exploration = Old workings include a caved north-trending adit and a small dump. In 1983 UNC Teton Exploration Drilling Company mapped the prospect, conducted VLF-EM surveys, collected geochemical samples, and drilled four holes for a total of 2,575 feet (Wilson and others, 1988). In 1990 Battle Mountain Exploration examined and sampled the prospect. One sample collected at the adit contained 2.19 ppm gold.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Alaska Resource Data File ARDF PM082

Bibliographic references

  • Deposit

    Wilson, F.H., White, W.H., and DuBois, G.D., 1988, Brief descriptions of mines, prospects, and mineral occurrences in the Port Moller and Stepovak Bay quadrangles, Alaska Peninsula: U.S. Geological Survey Open-File Report 88-666, 128 p., scale 1:250,000.

  • Deposit

    Ellis, W.T., and Apel, R.A., 1990, Unga/Alaska Peninsula 1990 final report, Battle Mountain Exploration Company report, 49 p., 29 map sheets at various scales. (Report held by the Aleut Corporation, Anchorage, Alaska.)

  • Deposit

    Wilson, F.H., Detterman, R.L., Miller, J. W., and Case, J.E., 1995, Geologic map of the Port Moller, Stepovak Bay, and Simeonof Island quadrangles, Alaska: U.S. Geological Survey Miscellaneous Investigation Series Map I-2272, 1 map sheet, scale 1:250,000.

Comments on the references

  • Primary Reference = Wilson and others, 1988

General comments

Subject category Comment text
Deposit Model Name = Epithermal gold veins

Reporter information

Type Date Name Affiliation Comment
Reporter 29-JAN-2001 S.H. Pilcher U.S. Geological Survey