West Lodes

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

Geologic information

Identification information

Deposit ID 10308163
Record type Site
Current site name West Lodes
Alternate or previous names Sowhat

Geographic coordinates

Geographic coordinates: -160.45642, 55.29244 (WGS84)
Relative position This occurrence is in sea cliffs above the west shore of Red Cove on Popof Island (Christie 1974, color anomaly 91; Wilson and others, 1988, locality 46). The map site is in sec. 34, T. 56 S., R. 73 W., of the Seward Meridian. The location is accurate to within 500 feet.
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Geographic areas

Country State
United States Alaska

Commodities

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

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Pyrite Ore
Sphalerite Ore
Calcite Gangue
Quartz Gangue

Alteration

  • (Local) The veins exhibit an alteration halo of unknown type.

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Nearby scientific data

(1) -160.45642, 55.29244

Comments on the geologic information

  • Geologic Description = This occurrence consists of two parallel quartz veins that strike northeast and cut andesite? belonging to the late Eocene to early Oligocene Popof volcanic rocks (Wilson and others, 1995). Vein I is 1 to 4 feet thick and is intermittently exposed over a strike length of 800 to 1,000 feet (Wilson and others, 1988). Vein II is as much as 4.6 feet thick and has a strike length of 800 feet. The veins project into the ocean to the south and appear to pinch out to the north. The best mineralization consists of high-grade pods of banded sphalerite and galena, accompanied by chalcopyrite and pyrite, in a gangue of calcite and quartz. Grab samples contain as much as 1.18 ppm gold, 78.2 ppm silver, and 9.9 percent zinc (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 = In the past the occurrence was located on two unpatented claims (Wilson and others, 1988). UNC Teton Exploration Drilling Conpany mapped and sampled the site in 1982. Grab samples were reported to contain as much as 1.18 ppm gold, 78.2 ppm silver, and 9.9 percent zinc (Peterson and others, 1982).

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Alaska Resource Data File ARDF PM102

Bibliographic references

  • Deposit

    Webber, B.S., Moss, J.M., Rutledge, F.A., and Sanford, R.S., 1946, Reconnaissance examinations of parts of the Alaska Peninsula and Aleutian Islands southwestern Alaska: U.S. Bureau of Mines, unpublished report of investigations, 40 p. (Unpublished report held by the U.S. Geological Survey, Anchorage.)

  • Deposit

    Christie, J.S., 1974, Aleut-Quintana-Duval 1974 joint venture, final report: Unpublished Quintana Minerals Corporation report, 24 p., 3 appendices, 2 maps. (Report held by the Aleut Corporation, Anchorage, Alaska.)

  • 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., 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

    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 Model Name = Epithermal gold veins, Polymetallic veins (Cox and Singer, 1986; model 22c)
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 17-JAN-01 S.H. Pilcher U.S. Geological Survey