Unnamed (south wall of valley of upper Windy Creek)

The Unnamed (south wall of valley of upper Windy Creek) 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 (south wall of valley of upper Windy Creek)

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: Malachite
Ore: Chalcopyrite
Ore: Azurite
Gangue: Epidote

Comments

Comment (Exploration): Status = Inactive

Comment (Reference): Primary Reference = Glavinovich, 1967

Comment (Geology): Age = Triassic or younger.

Comment (Commodity): Gangue = iron carbonate

Comment (Deposit): Model Name = Hydrothermally altered shear zone.

Comment (Geology): Geologic Description = The bedrock in the area of this occurrence is mainly 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). This small mineral occurrence consists of a small shear zone along which hydrothermal alteration has produced epidote, chalcopyrite, and iron carbonate minerals. Weathering produces malachite- and azurite-coated float and encrustations. This small mineral occurrence is one of many similar deposits in the Nikolai Greenstone. Most of these occurrences are part of an east-northeast trending fault zone several miles wide.

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.

Reference (Deposit): Smith, T.E., 1981, Geology of the Clearwater Mountains, south-central Alaska: Alaska Division of Geological & Geophysical Surveys Geologic Report 60, 72 p., 3 sheets, scale 1:63,360.

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