Bearhole Creek

The Bearhole Creek 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: Bearhole Creek

Commodity

Primary: Copper

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: 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: Light color may indicate oxidation.

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Pyrite
Ore: Chalcopyrite
Gangue: Quartz
Gangue: Graphite
Gangue: Feldspar

Comments

Comment (Reference): Primary Reference = Brabb and Miller, 1962

Comment (Workings): Workings / Exploration = Reconnaissance surface observations have been completed at this locality (Brabb and Miller, 1962).

Comment (Geology): Age = Tertiary the mineralized zone may trend north-south across Bearhole Creek and crosscut the host metasedimentary rocks. High-grade metamorphism in this area is Early Tertiary in age (Hudson and Plafker, 1982).

Comment (Deposit): Model Name = Shear zone with quartz-feldspar-graphite veins?

Comment (Deposit): Other Comments = This occurrence is within the Wrangell-St. Elias National Park.

Comment (Geology): Geologic Description = A 20-foot-wide mineralized zone in Mesozoic metasedimentary rocks contains as much as 20 percent pyrite and graphite and traces of chalcopyrite (Brabb and Miller, 1962). The zone contains quartz-feldspar-graphite veins; it is light colored and visible from a distance. Brabb and Miller (1962) observed similar mineralization locally on the south side of Bearhole Creek.

Comment (Exploration): Status = Inactive

References

Reference (Deposit): Hudson, T.L., and Plafker, George, 1982, Paleogene metamorphism of an accretionary flysch terrane, eastern Gulf of Alaska: Geological Society of America Bulletin, v. 93, p. 1280-1290.

Reference (Deposit): Cobb, E.H., 1972, Metallic mineral resources map of the Bering Glacier quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-373, 1 sheet, scale 1:250,000.

Reference (Deposit): Cobb, E.H., 1979, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Bering Glacier, Icy Bay, Middleton Island, and Yakutat quadrangles, Alaska: U.S. Geological Survey Open-File Report 79-1246, 41 p.

Reference (Deposit): Brabb, E.E., and Miller, D.J., 1962, Reconnaissance traverse across the eastern Chugach Mountains, Alaska: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-341, scale 1:96,000.

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