The Unnamed (a tributary to Tatina River) is a copper 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
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Unnamed (a tributary to Tatina River) MRDS details
Site Name
Primary: Unnamed (a tributary to Tatina River)
Commodity
Primary: Copper
Primary: Zinc
Secondary: Lead
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: Polymetallic veins
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Pyrite
Ore: Chalcopyrite
Gangue: Quartz
Comments
Comment (Exploration): Status = Inactive
Comment (Workings): Workings / Exploration = The reporter sampled the site in 1984. Two samples taken across the vein in separate locations averaged 230 ppm zinc, 314 ppm copper, and 90 ppm lead.
Comment (Deposit): Model Name = Polymetallic vein (Cox and Singer, 1986; model 22c).
Comment (Geology): Geologic Description = This unnamed occurrence is a low sulfide, quart-carbonate vein system that strikes east-west near the contact between the Upper Triassic to Lower Jurassic, Tatina River Volcanics and the Lower Cretaceous Kahiltna Flysch (Bundtzen, Harris, and Gilbert, 1997). The mineralized zone occurs in a well-defined shear zone subparallel to bedding; it continues for at least 140 meters, and varies from 15 centimeters to one meter thick. Principle sulfides include pyrite and minor to trace chalcopyrite disseminated throughout the quartz-carbonate vein. Two samples taken across the vein averaged 230 ppm zinc, 314 ppm copper, and 90 ppm lead.
Comment (Reference): Primary Reference = This description
References
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.
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