Unnamed (south of upper Wood River)

The Unnamed (south of upper Wood River) is a copper and gold 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 of upper Wood River)

Commodity

Primary: Copper
Primary: Gold

Location

State: Alaska
District: Bonnifield

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: Massive sulfide, Besshi (Japanese deposits)

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Chalcopyrite

Comments

Comment (Deposit): Model Name = Besshi massive sulfide(?) (Cox and Singer, 1986; model 24b)

Comment (Exploration): Status = Inactive

Comment (Workings): Workings / Exploration = Surface samples only.

Comment (Geology): Geologic Description = The general area of this occurrence is underlain by the Devonian Yanert Fork sequence, which consists of siliceous mudstone, argillite, slate, phyllite, semischist, and impure quartzite, and minor metachert and metavolcanic rocks. The bedded rocks are cut by Triassic(?) gabbro sills and dikes (Wilson and others, 1998). The occurrence consists of iron-stained, chalcopyrite- and pyrite-bearing gabbro, and pyritic metasedimentary rocks. Samples of the sulfide-bearing rocks contain up to 172 ppm copper and 0.7 ppm gold (Sherwood and others, 1976).

Comment (Reference): Primary Reference = Sherwood and others, 1976

Comment (Geology): Age = Probably Late Triassic.

References

Reference (Deposit): Wilson, F.H., Dover, J.H., Bradley, D.C., Weber, F.R., Bundtzen, T.K., and Haeussler, P.J., 1998, Geologic map of central (interior) Alaska: U.S. Geological Survey Open-File Report 98-133, 17 p., 2 sheetsm, scale 1:500,000.

Reference (Deposit): Sherwood, K.W., Craddock, Campbell, and Smith, T.E., 1976, Mineral occurrences in the upper Wood River, Edgar Creek, and West Fork Glacier areas, central Alaska Range: Alaska Division of Geological & Geophysical Surveys Special Report 14, 13 p.

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