Feather Bed

The Feather Bed is a copper 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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Site Name

Primary: Feather Bed

Commodity

Primary: Copper

Location

State: Alaska
District: Seward

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

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

Physiography

Not available

Mineral Deposit Model

Model Name: Massive sulfide, Cyprus

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: None reported.

Rocks

Name: Basalt
Role: Associated
Age Type: Host Rock Unit
Age Young: Late Cretaceous

Name: Basalt
Role: Associated
Age Type: Host Rock
Age Young: Late Cretaceous

Analytical Data

Not available

Materials

Ore: Chalcopyrite
Ore: Pyrite

Comments

Comment (Reference): Primary Reference = Martin and others, 1915

Comment (Reserve-Resource): Reserves = None reported.

Comment (Workings): Workings / Exploration = Surface samples assayed 14 to 19 percent copper in the main showing. No assay results reported for the shoreline occurrence (Martin and others, 1915).

Comment (Exploration): Status = Inactive

Comment (Geology): Geologic Description = Tysdal and Case (1979) described the bedrock geology in this area as Cretaceous, pale to dark green aphyric to porphyritic pillow basalt with subordinate pillow breccia, tuff, and siltstone. ? the shoreline occurrence consists of a few shallow pits containing pyrite- and chalcopyrite-bearing float. The main occurrence mineralization is contained in a shear zone that holds four stringers of nearly pure chalcopyrite. The stringers, the largest of which is 7 inches thick, assayed 14 to 19 percent copper (Martin and others, 1915 p. 234-235). The shear zone strikes north-south and is about vertical. This zone has been traced from an elevation of 2,500 feet to 3,500 feet (Martin and others, 1915 p. 234-235).

Comment (Deposit): Model Name = Cyprus massive sulfide (Cox and Singer, 1986; model 24a).

Comment (Geology): Age = Cretaceous.

References

Reference (Deposit): Tysdal, R.G., and Case, J.E., 1979, Geologic map of the Seward and Blying Sound quadrangles, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-1150, scale 1:250,000.

Reference (Deposit): Cobb, E.H. and Tysdal, R.G., 1980, Summaries of data on and list of references to metallic and selected nonmetallic mineral deposits in the Blying Sound and Seward quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-621, 276 p.

Reference (Deposit): Grant, U.S., and Higgins, D.F., Jr., 1909, Notes on geology and mineral prospects in the vicinity of Seward, Kenai Peninsula: U.S. Geological Survey Bulletin 379-C, p. 98-107.

Reference (Deposit): MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.

Reference (Deposit): Grant, U.S., and Higgins, D.F., Jr., 1910, Reconnaissance of the geology and mineral resources of Prince William Sound, Alaska: U.S. Geological Survey Bulletin 443, 89 p.

Reference (Deposit): Cobb, E.H., 1972, Metalic mineral resources map of the Blying Sound quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-440, 1 sheet, scale 1:150,000.

Reference (Deposit): Cobb, E.H., 1972, Metalic mineral resources map of the Blying Sound quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Stuudies Map MF-440, 1 sheet, scale 1:150,000.

Reference (Deposit): Berg, H.C., and Cobb, E.H., 1967, Metalliferous Lode Deposits of Alaska. U.S. Geological Survey Bulletin 1246, 254 p.

Reference (Deposit): Martin G.C., Johnson, B.L., and Grant, U.S., 1915, Geology and mineral resources of Kenai Peninsula, Alaska: U.S. Geological Survey Bulletin 587, 243 p.

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