Unnamed (below McCune/Heney Glaciers)

The Unnamed (below McCune/Heney Glaciers) is a lead and gold 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 (below McCune/Heney Glaciers)

Commodity

Primary: Lead
Primary: Gold

Location

State: Alaska
District: Copper River

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

Model Name: Placer Au-PGE
Model Name: Massive sulfide, Cyprus

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Pyrrhotite
Ore: Galena
Gangue: Quartz

Comments

Comment (Workings): Workings / Exploration = Site was sampled as part of a U.S. Bureau of Mines and U.S.G.S. mineral resource assessment of the Chugach National Forest (Jansons and others, 1984; Nelson and others, 1984). The area near the terminus of Heney Glacier was examined by industry in 1988 for placer gold (Kodosky and Teller, 1989).

Comment (Deposit): Model Name = Placer Au (Cox and Singer, 1986; model 39a) and Cyprus massive sulfide (Cox and Singer, 1986; model 24a)

Comment (Deposit): Other Comments = Chugach Alaska Corporation, Anchorage, Alaska has control of these lands.

Comment (Geology): Geologic Description = The placer occurrence consists of small amounts of gold in alluvial and colluvial gravels derived from underlying metasedimentary rocks of the Upper Cretaceous Valdez Group (Nelson and others, 1985), and from the dunes near the terminus of Heney Glacier (Kodosky and Teller, 1989). A 0.1- cubic-yard sample assayed 0.0006 oz. Au/cubic yard (Jansons and others, 1984). In addition to the placer occurrence, Jansons and others (1984) describe a shear zone in Valdez Group metasedimentary and metavolcanic rocks in this area that contains galena and pyrrhotite. Analysis of a sample from the shear zone contained 0.14% Pb.

Comment (Reference): Primary Reference = Jansons and others, 1984

Comment (Exploration): Status = Inactive

Comment (Geology): Age = Placer Au is Holocene. Sulfide mineralization is Late Cretaceous or younger, based on the age of the host rocks.

References

Reference (Deposit): Jansons, Uldis, Hoekzema, R.B., Kurtak, J.M., and Fechner, S.A., 1984, Mineral occurrences in the Chugach National Forest, Southcentral Alaska: U.S. Bureau of Mines Open-File Report 5-84, 218 p., 2 sheets, scale 1:250,000.

Reference (Deposit): Nelson, S.W., Miller, M.L., Barnes, D.F., Dumoulin, J.A., Goldfarb, R.J., Koski, R.A., Mull, C.G., Pickthorn, W.J., Jansons, Uldis, Hoekzema, R.B., Kurtak, J.M., and Fechner, S.A., 1984, Mineral resource potential of the Chugach National Forest, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1645-A, 24 p., 1 plate, scale 1:250,000.

Reference (Deposit): Nelson, S.W., Dumoulin, J. A., and Miller, M.L., 1985, Geologic map of the Chugach National Forest, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1645-B, 16 p., 1 sheet, scale 1:250,000.

Reference (Deposit): Kodosky, Larry, and Teller, Steve, 1989, Economic mineral assessment of Chugach Alaska Corporation properties and selected land in the Copper, Bremner, and Tasnuna River area: unpublished report prepared for Chugach Alaska Corporation, Anchorage, Alaska, 116 p.

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