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

Geologic information

Identification information

Deposit ID 10308140
Record type Site
Current site name Normandy

Geographic coordinates

Geographic coordinates: -160.68341, 55.19023 (WGS84)
Relative position The Normandy prospect is located on Unga Island on the beach and cliffs on the east shore of Acheredin Bay (Wilson and others, 1988, locality 38). The map site is in the NW1/4 of sec. 4, T. 58 S., R. 75 W., of the Seward Meridian. The location is accurate to within 1,000 feet.
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Geographic areas

Country State
United States Alaska


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

Materials information

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


  • (Local) The alteration consists of silicification.

Mineral occurrence model information

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

Nearby scientific data

(1) -160.68341, 55.19023

Comments on the geologic information

  • Geologic Description = The Normandy prospect, discovered in 1981, consists of a northeast-striking 15- to 40-foot-wide zone of quartz veins, silicified andesite, and sulfides, chielfly pyrite, chalcopyrite, galena, and sphalerite. The andesite is part of the late Eocene to early Oligocene Popof volcanic rocks (Wilson and others, 1995). The mineralization is exposed on the sea cliffs and extends at least 300 feet into the ocean. It is traceable on land as an airphoto lineament. VLF-EM surveys indicate anomalies on strike at 600 and 3,000 feet from the beach. Deep soil and flooding have prevented trenching from exposing the deposit. Assays of rock samples show up to 0.3 percent copper, 3.7 percent lead, 9.4 percent zinc, 2.6 ppm gold, and 214 ppm silver (Peterson and others, 1982). Battle Mountain Exploration Company examined the site in 1986. A grab sample collected at that time contained 1.71 ppm gold (Pilcher, 1986).
  • Age = Eocene or younger.

Economic information

Economic information about the deposit and operations

Development status Prospect

Comments on exploration

  • Status = Inactive

Mining district

District name Alaska Peninsula

Comments on the workings information

  • Workings / Exploration = Resource Associates of Alaska and UNC Teton Exploration Drilling Company collected 27 rock samples, conducted VLF-EM surveys, and cut several trenches that did not expose the deposit. Rock samples contained as much as 0.3 percent copper, 3.7 percent lead, 9.4 percent zinc, 2.6 ppm gold, and 214 ppm silver. Battle Mountain Exploration Company examined the site in 1986. A grab sample collected at that time contained 1.71 ppm gold.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Alaska Resource Data File ARDF PM070

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

    Pilcher, S.H., 1986, Unga project: Battle Mountain Exploration Company report, 33 p. (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 = 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 15-JAN-01 S.H. Pilcher U.S. Geological Survey