Unnamed (southeast of upper Finger Glacier)

The Unnamed (southeast of upper Finger Glacier) is a nickel and 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: Unnamed (southeast of upper Finger Glacier)

Commodity

Primary: Nickel
Primary: Copper

Location

State: Alaska
District: Yakutat

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

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Chalcopyrite
Ore: Nickel
Ore: Pentlandite
Ore: Pyrrhotite

Comments

Comment (Workings): Workings / Exploration = Surface exposure of mineralized rock; no workings.

Comment (Deposit): Model Name = Lode: Disseminated copper and nickel-bearing minerals in dioritic phase(?) of layered mafic intrusive.

Comment (Deposit): Other Comments = Chugach terrane. The location is in Glacier Bay National Park and Preserve.

Comment (Commodity): Ore Material = pentlandite or nickeliferous pyrrhotite

Comment (Reserve-Resource): Reserves = Possible reserves contained in sulfide-bearing lenses as much as 10 feet thick and traceable for 500 feet.

Comment (Reference): Primary Reference = Mark-Anthony, 1977

Comment (Geology): Geologic Description = Based on its reported location, the occurrence is in the central part of the Crillon-LaPerouse layered mafic-ultramafic intrusion of Tertiary age. The occurrences were described as 'lenses of nickel-bearing pyrrhotite in diorite within the mafic intrusion' (Mark-Anthony, 1977; also, communication Leo Mark-Anthony, 1998). A sample collected by Mark-Anthony contained 0.83 percent nickel and 0.18 percent copper. Copper is abundant enough to form a separate phase, probably chalcopyrite.

Comment (Exploration): Status = Inactive

Comment (Geology): Age = Tertiary.

References

Reference (Deposit): Mark-Anthony, Leo, 1977, Maps and notes on investigations in Glacier Bay, 1958-1960. (Unpublished material available at U.S. Bureau of Land Management library, Juneau, Alaska).

Reference (Deposit): Kimball, A.L., Still, J.C., and Rataj, J.L., 1978, Mineral resources, in Brew, D. A., and others, Mineral resources of the Glacier Bay National Monument wilderness study area, Alaska: U.S. Geological Survey Open-File Report 78-494, p. C1-C375.

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