The Big Eldorado is a copper 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
Big Eldorado MRDS details
Site Name
Primary: Big Eldorado
Commodity
Primary: Copper
Primary: Gold
Location
State: Alaska
District: Chisana
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: Polymetallic veins
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Late Cretaceous
Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Late Cretaceous
Analytical Data
Not available
Materials
Ore: Chalcopyrite
Ore: Gold
Ore: Pyrite
Gangue: Quartz
Comments
Comment (Workings): Workings / Exploration = No data available. Type of workings: surface
Comment (Reference): Primary Reference = Richter and others, 1975, USGS MF-655-K, loc.31.
Comment (Deposit): Model Name = Lode: vein
Comment (Geology): Geologic Description = Quartz vein containing pyrite, chalcopyrite and gold in syenodiorite of Cretaceous age.
Comment (Exploration): Status = Inactive
References
Reference (Deposit): Richter, D.H., and Jones, D.L., 1973, Reconnaissance geologic map of the Nabesna A-2 quadrangle, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map I-749, scale 1:63,360.
Reference (Deposit): Richter, D.H., Singer, D.A., and Cox, D.P., 1975, Mineral resources map of the Nabesna quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-655-K, scale 1:250,000.
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