Unnamed (east flank of Takotna Mountain)

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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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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