The Unnamed is a lead, zinc, gold, silver, 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
Elevation:
Commodity: Lead, Zinc, Gold, Silver, Copper
Lat, Long: 62.2, -142.95000
Map: View on Google Maps
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.
Unnamed MRDS details
Site Name
Primary: Unnamed
Secondary: Unnamed (northwest of terminus of Nabesna Glacier)
Commodity
Primary: Lead
Primary: Zinc
Primary: Gold
Primary: Silver
Primary: Copper
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
Not available
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
Name: Diorite
Role: Associated
Age Type: Host Rock
Age Young: Late Triassic
Analytical Data
Not available
Materials
Ore: Chalcopyrite
Ore: Galena
Ore: Sphalerite
Gangue: Quartz
Comments
Comment (Workings): Workings / Exploration = Small prospect pits dug on veins. Chip sample across veins assayed 2.4 ppm Au, 200 ppm Ag, >20,000 ppm Pb, > 10,000 ppm Zn, >20,000 ppm Cu (USGS OF 398, sample 587). Type of workings: surface.
Comment (Deposit): Model Name = lode, contact metasomatic
Comment (Geology): Geologic Description = Quartz veins, up to 1 ft thick, containing sphalerite, galena and minor chalcopyrite in recrystallized Triassic limestone near contact with Cretaceous granodiorite stock.
Comment (Exploration): Status = Inactive
References
Reference (Deposit): Richter, D.H., and Matson, N.A., 1970, Geochemical data from the Nabesna A-4 quadrangle, Alaska: U.S. Geological Survey Open-File Report 70-276, 14 p., 1 sheet, scale 1:63,360.
Reference (Deposit): Richter, D.H., 1973, Reconnaissance geological map of the Nabesna A-1 quadrangle, Alaska: U.S. Geological Survey Miscellaneous Investigations Series Map 1-789, 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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