Cobre

The Cobre is a copper, lead, and zinc 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

Satelite View

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: Cobre

Commodity

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

Location

State: Alaska
District: Kiana

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

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

Physiography

Not available

Mineral Deposit Model

Model Name: Massive sulfide, kuroko

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Chalcopyrite

Comments

Comment (Workings): Workings / Exploration = Geologic mapping and some geochemical sampling. Claims staked in 1979 by Anaconda. One six foot (2 m) chip sample ran 0.34% Cu, 10 ppm Pb, 9 ppm Zn, 9 ppm Co. Two float samples ran 0.7% and 0.8 % Cu, 40 and 29 ppm Pb, 18 and 14 ppm Zn, and 3 and 2 ppm Co. A sample from a vein in marble ran 4700 ppm Pb, 760 ppm Zn, 4.9 ppm Ag (unpublished Anaconda notes).

Comment (Exploration): Status = Inactive

Comment (Deposit): Model Name = Kuroko ?

Comment (Geology): Geologic Description = Bedding-controlled disseminated chalcopyrite deposit up to 6 ft (3 m) thick in metaquartzite, quartz-mica schist, quartz-chlorite schist, and locally marble. The copper-bearing beds are estimated to lie 4000 m stratigraphically below the Smucker rhyolite (Devonian). The host rocks could therefore be early Paleozoic or late PreCambrian. The copper-bearing rocks are interlayered with marbles and lie about 60 m stratigraphically above a stromatolite-bearing horizon. Other stromatolites are found along the ridge 7800 ft (2600 m) to the north, in a faulted syncline.

Comment (Reference): Primary Reference = Unpublished Anaconda notes from 1979.

Comment (Deposit): Other Comments = Discovered by Anaconda geologist in 1979.

Comment (Geology): Age = Early Paleozoic

References

Reference (Deposit): UNPUBLISHED ANACONDA NOTES FROM 1979

Reference (Deposit): Unpublished Anaconda notes from 1979.

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