Occurrence in Alaska, United States with commodities Silver, Gold, Arsenic, Copper, Mercury, Lead, Zinc

Geologic information

Identification information

Deposit ID 10308131
Record type Site
Current site name Antonette

Geographic coordinates

Geographic coordinates: -160.65142, 55.25523 (WGS84)
Relative position The Antonette prospect, on northwestern Unga Island, is at an elevation of about 1,100 feet, in the SW1/4 of sec. 10, T. 57 S., R. 75 W., Seward Meridian. The location is accurate to within 2,500 feet.
(click for info)

Geographic areas

Country State
United States Alaska


Commodity Importance
Silver Primary
Gold Primary
Arsenic Secondary
Copper Secondary
Mercury Secondary
Lead Secondary
Zinc Secondary

Materials information

Materials Type of material
Pyrite Ore


  • (Local) The rocks exhibit silicification, pyritization, and argillization.

Nearby scientific data

(1) -160.65142, 55.25523

Comments on the geologic information

  • Geologic Description = The rocks at this site are a sequence of rhyolitic lavas and ash-flow tuffs that have been brecciated, pyritized, silicified, and argillized (Peterson and others, 1982). They are part of the Eocene to Oligocene Popof volcanic rocks (Wilson and others, 1995). The exposed alteration is vertically zoned upward from silicification and pyritization to argillization. Four samples contained as much as 0.309 ppm gold, 1.03 ppm silver, 79 ppm copper, 25 ppm lead, 32 ppm zinc, 990 ppm arsenic, and 2.55 ppm mercury (Peterson and others, 1982).
  • Age = Eocene or younger.

Economic information

Economic information about the deposit and operations

Development status Occurrence

Comments on exploration

  • Status = Inactive

Mining district

District name Alaska Peninsula

Comments on the workings information

  • Workings / Exploration = Four rock samples collected in 1982 by UNC Teton Exploration Drilling Company contained as much as 0.309 ppm gold, 1.03 ppm silver, 79 ppm copper, 25 ppm lead, 32 ppm zinc, 990 ppm arsenic, and 2.55 ppm mercury (Peterson and others, 1982).

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Alaska Resource Data File ARDF PM058

Bibliographic references

  • Deposit

    Peterson, R.J., Lemmers, J., Handverger, P., Gallagher, J., Pilcher, R., East, J., Macleod, T., Bartels. E., 1982, Geology and precious metals potential Unga, Popof, and Korovin Islands, Shumagin Group, Aleutian Chain, Alaska: UNC Teton Exploration Drilling Company report, 127 p., 5 map sheets, 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 = Peterson and others, 1982

General comments

Subject category Comment text
Deposit Other Comments = This prospect is located on land patented by, or interim-conveyed to, the Aleut Corporation.

Reporter information

Type Date Name Affiliation Comment
Reporter 31-JAN-01 S.H. Pilcher U.S. Geological Survey