The Unnamed (east flank of Takotna Mountain) is a 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
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Unnamed (east flank of Takotna Mountain) MRDS details
Site Name
Primary: Unnamed (east flank of Takotna Mountain)
Commodity
Primary: Silver
Primary: Copper
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
Alteration Type: L
Alteration Text: Sericitic and secondary biotite.
Rocks
Role: Host
Age Type: Host Rock
Age in Years: 71.200000+-
Age Young: Early Cretaceous
Analytical Data
Not available
Materials
Ore: Pyrite
Ore: Chalcopyrite
Gangue: Quartz
Comments
Comment (Exploration): Status = Inactive
Comment (Geology): Age = Chronological age is for the host pluton.
Comment (Geology): Age = Unknown; host pluton is 71.2 Ma (Bundtzen and Laird, 1983).
Comment (Reference): Primary Reference = Bundtzen and Laird, 1983
Comment (Deposit): Model Name = Polymetallic vein (Cox and Singer, 1986; model 22c).
Comment (Geology): Geologic Description = This unnamed occurrence consists of disseminated chalcopyrite and pyrite in silicified zones of a border phase of the Takotna Mountain composite pluton, which was radiometrically dated at 71.2 Ma (Bundtzen and Laird, 1983). The occurrence is near a faulted contact between the pluton and somewhat older andesitic stratovolcano of the Takotna Mountain volcanic-plutonic complex, one of thirteen known in the Kuskokwim Mineral Belt of southwest Alaska (Bundtzen and Miller, 1997). No estimates of the size of the mineralized zone are available. Two grab samples from the mineralized zone contained up to 222 ppm copper, 0.6 grams/tonne silver, and 100 ppm lead (Bundtzen and Laird, 1983).
Comment (Workings): Workings / Exploration = The unnamed occurrence was investigated by the reporter in 1978 during a 1:63,360 scale geologic mapping effort for the Alaska Division of Geological and Geophysical Surveys in the McGrath quadrangle (Bundtzen and Laird, 1983). Two grab samples from the mineralized zone contained up to 222 ppm copper, 0.6 grams/tonne silver, and 100 ppm lead.
References
Reference (Deposit): Bundtzen, T.K., and Laird, G.M., 1983, Geologic map of the McGrath D-6 quadrangle, Alaska: Alaska Division of Geological and Geophysical Surveys Geologic Report 79, 1:63,360 scale.
Reference (Deposit): Bundtzen, T.K., and Miller, M.L., 1997, Precious metals associated with Late Cretaceous-early Tertiary igneous rocks of southwestern Alaska, in Goldfarb, R.J., and Miller, L.D., eds., Economic Geology Monograph #9, Mineral Deposits of Alaska, p. 242-286.
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