Unnamed (west of Chirikof Point)

Occurrence in Alaska, United States with commodities Iron, Copper, Lead

Geologic information

Identification information

Deposit ID 10307227
Record type Site
Current site name Unnamed (west of Chirikof Point)

Geographic coordinates

Geographic coordinates: -173.42237, 52.81897 (WGS84)
Relative position This site is located west of Chirikof Point on Attu Island. Its specific location is not known. The map site is probably accurate to within 3 miles.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Iron Primary
Copper Secondary
Lead Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Pyrite Ore

Alteration

  • (Local) The altered rocks contain silica, albite, epidote, chlorite, and iron-oxides.

Nearby scientific data

(1) -173.42237, 52.81897

Comments on the geologic information

  • Geologic Description = On Attu Island partly oxidized zones of pyrite occur in many rock types, including basalt and andesite flows and pyroclastics (Gates and others, 1971). The zones range in size from small isolated pods a few feet in diameter to broad areas 2 to 3 miles long and one mile wide. Many elongate zones or small, isolated patches trend or are aligned east-west. At Chirikof Point pyritic mineralization is associated with flows and hornblende-bearing dikes and shows evidence of silicification and albitization with accompanying epidote and chlorite. The mineralized zones carry traces of copper and lead.
  • Age = Tertiary or younger.

Economic information

Economic information about the deposit and operations

Development status Occurrence

Comments on exploration

  • Status = Inactive

Mining district

District name Aleutian Islands

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Alaska Resource Data File ARDF AT002

Bibliographic references

  • Deposit

    Gates, O., Powers, H.A., and Wilcox, R.E., 1971, Geology of the Near Islands, Alaska: U.S. Geological Survey Bulletin 1028-U, 113 p., 3 map sheets, scale 1:63,360.

Comments on the references

  • Primary Reference = Gates and others, 1971

General comments

Subject category Comment text
Deposit Other Comments = Site is located within Aleutian Maritime Wildlife Refuge.

Reporter information

Type Date Name Affiliation Comment
Reporter 22-JAN-00 S.H. Pilcher U.S. Geological Survey