Unnamed (east of Susitna Lodge airstrip)

The Unnamed (east of Susitna Lodge airstrip) is a 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 of Susitna Lodge airstrip)

Commodity

Primary: Copper

Location

State: Alaska
District: Valdez Creek

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

Not available

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Propylitic alteration of greenstone

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Chalcopyrite
Ore: Chalcocite
Ore: Bornite
Ore: Copper
Ore: Malachite
Gangue: Quartz
Gangue: Epidote

Comments

Comment (Geology): Geologic Description = The area of this occurrence is underlain by the Middle or Upper Triassic Nikolai Greenstone, a thick sequence of subaerial and submarine basalt flows and minor interbedded volcaniclastic sedimentary rocks, aquagene and epiclastic tuff, breccia, argillite, and radiolarian chert (Nokleberg and others, 1992). The deposit is in a hydrothermally altered shear zone in greenstone, and consists of quartz, epidote, chalcopyrite, and an iron carbonate mineral. Weathering produces malachite- and azurite-coated float and encrustations. Glavinovich (1967) describes this occurrence as follows: 'Mineralized amygdaloidal andesite occurs in talus. Bornite, malachite and microscopic native copper associated with quartz pods occur in the andesite. The small quartz pods appear to have formed by replacement of the andesite. Bornite is later than the quartz and may, in part, be replacing it. Some of the strongly epidotized rock (greenstone) contains splashes of bornite, chalcocite (?) and malachite along fracture surfaces'.

Comment (Reference): Primary Reference = Glavinovich, 1967

Comment (Exploration): Status = Inactive

Comment (Geology): Age = Triassic or younger.

References

Reference (Deposit): Nokleberg, W.J., and others, 1992, Circum-North Pacific terrane map, in Tracy, K.V., Anker, E. M., Ryan, C., Hoffman, V. , eds., International conference on Arctic margins, p. 44.

Reference (Deposit): Glavinovich, P.S., 1967, Trace element copper distribution and areal geology in a portion of the Clearwater Mountains, Alaska: University of Alaska Minerals Industry Research Laboratory, Report 10, 55 p.

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