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
Cobre MRDS details
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ppm Pb, 18 and 14 ppm Zn, and 3 and 2 ppm Co. A sample from a vein in marble ran 4700 ppm Pb, 760 ppm Zn, 4.9 ppm Ag (unpublished Anaconda notes).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Comment (Reference): Primary Reference = Unpublished Anaconda notes from 1979.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Reference (Deposit): UNPUBLISHED ANACONDA NOTES FROM 1979
Reference (Deposit): Unpublished Anaconda notes from 1979.
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