Unknown (east of Abraham Bay)

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

Geologic information

Identification information

Deposit ID 10307226
Record type Site
Current site name Unknown (east of Abraham Bay)

Geographic coordinates

Geographic coordinates: -172.82237, 52.84898 (WGS84)
Relative position This site represents numerous occurrences east of Abraham Bay on Attu Island. Its specific location is not known. The map site is plotted at an elevation of about 1,200 feet and about 3 miles east of Abraham bay, and 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) Albite, calcite, iron-oxides, and zeolites (descriptions are not clear and some of these may represent gangue minerals).

Nearby scientific data

(1) -172.82237, 52.84898

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. The pyritic zones are associated with swarms of hornblende-bearing dikes and are rich in pyrite, calcite, albite, and zeolites. Base metals are rare and only a few crystals of chalcopyrite and galena have been noted.
  • 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 AT001

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.

  • Deposit

    Cobb, E.H., 1980, Summaries of data and lists of references to metallic and selected nonmetallic mineral deposits in fifteen quadrangles in southwestern and west-central Alaska: U.S. Geological Survey Open-File Report 80-909, 103 p.

Comments on the references

  • Primary Reference = Gates and others, 1971

General comments

Subject category Comment text
Deposit Other Comments = Site is located in Alaska Maritime Natural Wildlife Refuge.

Reporter information

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