Unknown (east of Abraham Bay)

The Unknown (east of Abraham Bay) is a iron mine located in Alaska.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

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MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Site Name

Primary: Unknown (east of Abraham Bay)

Commodity

Primary: Iron
Secondary: Copper
Secondary: Lead

Location

State: Alaska
District: Aleutian Islands

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Years of Production:
Organization:
Significant:

Physiography

Not available

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Albite, calcite, iron-oxides, and zeolites (descriptions are not clear and some of these may represent gangue minerals).

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Pyrite
Ore: Galena
Ore: Chalcopyrite

Comments

Comment (Exploration): Status = Inactive

Comment (Reference): Primary Reference = Gates and others, 1971

Comment (Geology): 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.

Comment (Geology): Age = Tertiary or younger.

Comment (Deposit): Other Comments = Site is located in Alaska Maritime Natural Wildlife Refuge.

References

Reference (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.

Reference (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.

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