Westover

The Westover 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: Westover

Commodity

Primary: Copper
Secondary: Silver

Location

State: Alaska
District: Nizina

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

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

Physiography

Not available

Mineral Deposit Model

Model Name: Basaltic Cu (BC name is Volcanic redbed Cu)

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Name: Limestone
Role: Host
Age Type: Host Rock Unit
Age Young: Late Triassic

Name: Limestone
Role: Host
Age Type: Host Rock
Age Young: Late Triassic

Analytical Data

Not available

Materials

Ore: Malachite
Ore: Chalcopyrite
Ore: Chalcocite
Ore: Bornite

Comments

Comment (Reference): Primary Reference = Miller, 1946

Comment (Exploration): Status = Inactive

Comment (Workings): Workings / Exploration = More than 400 m of underground workings on 4 unconnected levels driven between 1911 and 1930. Channel samples across lode contain 50 ppm Ag, 2,000 ppm As, >2 percent Cu (MacKevett and Smith, 1968).

Comment (Deposit): Model Name = Basaltic Cu

Comment (Geology): Geologic Description = Bornite and minor chalcocite, malachite and chalcopyrite in wedge-shaped pods, lenses, veins, and disseminations in lower 20 ft of the Upper Triassic Chitistone Limestone which overlies the Nikolai Greenstone. Largest pod 10 m long and 3 m wide. Limestone locally silicified near ore. Similar to Kennicott deposit (MC003).

Comment (Production): Production Notes = Minor production 1911-1920.

Comment (Geology): Age = Cretaceous

References

Reference (Deposit): MacKevett, E.M., Jr., 1976, Mineral deposits and occurrences in the McCarthy quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-773-B, scale 1:250,000.

Reference (Deposit): MacKevett, E.M., Jr., and Smith, J.G., 1972, Geologic map of the McCarthy B-4 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ-943, scale 1:63,360.

Reference (Deposit): Miller, D.J., 1946, Copper deposits of the Nizina district, Alaska: U.S. Geological Survey Bulletin 947F, p. 93-120.

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): MacKevett, E.M., Jr., and Smith, J.G., 1968, Distribution of gold, copper, and some other metals in the McCarthy B-4 and B-5 quadrangles, Alaska: U.S. Geological Survey Circular 604, 25 p.

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