Unnamed

The Unnamed is a zinc 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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MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Site Name

Primary: Unnamed

Commodity

Primary: Zinc
Primary: Copper
Secondary: Silver
Secondary: Cobalt

Location

State: Alaska
District: McGrath

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: Noril'sk Cu-Ni-PGE

Orebody

Not available

Structure

Not available

Alterations

Alteration Text: None.

Rocks

Not available

Analytical Data

Not available

Materials

Gangue: Olivine

Comments

Comment (Deposit): Other Comments = Similar to Robert's PGM (MG030), Unnamed (MG048), and Chip-Loy (MG032) deposits and prospects.

Comment (Commodity): Ore Material = Unidentified brassy sulfides

Comment (Deposit): Model Name = Disseminated Cu-Ni-Co (Cox and Singer, 1986; model 5b).

Comment (Workings): Workings / Exploration = The sill swarm was mapped by the reporter in 1981 (Bundtzen, Kline, and Clough, 1982). Foley (1987) reports values of 210 ppm copper, 56 ppm cobalt, 330 ppm zinc, and 0.5 grams/tonne silver from the sulfide-bearing sill.

Comment (Commodity): Gangue = peridotite

Comment (Reference): Primary Reference = Foley, 1987

Comment (Geology): Geologic Description = This unnamed occurrence is hosted in a northwest-trending northward-dipping mafic sill of Late Triassic (?) age, a feeder for mafic volcanics of the Tatina River Volcanics, a unit of the Mystic subterrane. Unidentified, brassy, disseminated sulfides - probably iron sulfide - occur at the base of the mafic sill. Foley (1987) reports values of 210 ppm copper, 56 ppm cobalt, 330 ppm zinc, and 0.5 grams/tonne silver from the sulfide-bearing sills.

Comment (Exploration): Status = Inactive

References

Reference (Deposit): Foley, J.Y., 1987, Reconnaissance strategic and critical mineral investigations in the McGrath A-3 and B-2 quadrangles, southwest Alaska: U.S. Bureau of Mines Field Report, 26 pages.

Reference (Deposit): Bundtzen, T.K., Harris, E.E., and Gilbert, W.G., 1997, Geologic Map of the eastern McGrath quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 97-14, 34 pages, one sheet, scale 1:125,000.

Reference (Deposit): Bundtzen, T.K., Kline, J.T., and Clough, J.G., 1982, Preliminary geologic map of the McGrath B-2 quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Open-File report 149, 22 pages, one sheet, scale 1:63,360.

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