Unnamed (between upper West Fork and Yanert glaciers)

The Unnamed (between upper West Fork and Yanert glaciers) 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 (between upper West Fork and Yanert glaciers)

Commodity

Primary: Copper
Primary: Gold

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

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 (Exploration): Status = Inactive

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

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

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

Comment (Geology): Geologic Description = The country rocks in the area of this occurrence are Upper Triassic calcareous shale, argillite, sandstone, siltstone, and limestone cut by numerous dikes, sills, and plugs of altered diabase and gabbro (Wilson and others, 1998). The deposit apparently consists of disseminations of chalcopyrite in metasedimentary rocks near the contact of altered gabbro. Samples of the chalcopyrite-bearing rock contained 980 ppm copper and 0.2 ppm gold (Sherwood and others, 1976).

Comment (Geology): Age = Late Triassic or younger.

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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