Unnamed (near Cheeneetnuk River)

The Unnamed (near Cheeneetnuk River) 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 (near Cheeneetnuk River)

Commodity

Primary: Copper
Secondary: Silver

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 replacement

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Pyrite

Comments

Comment (Geology): Geologic Description = This unnamed occurrence is a mineralized, pyritic argillite near the contact between Middle Devonian limestone and upper Paleozoic argillite, both subdivisions of the Mystic subterrane (Gilbert, 1981; Wilson and others, 1998). The argilite appears to be thermally upgraded to hornfels; a mid-Tertiary granite pluton is exposed about one mile west of the occurrence. One grab sample contained 178 ppm copper and 0.7 grams/tonne silver (Gilbert, 1981).

Comment (Workings): Workings / Exploration = W.G. Gilbert found the mineral zone during a geologic mapping project for the Alaska Division of Geological and Geophysical Surveys in 1977 (Gilbert, 1981). One grab sample contained 178 ppm copper and 0.7 grams/tonne silver.

Comment (Reference): Primary Reference = Gilbert, 1981

Comment (Deposit): Model Name = Polymetallic replacement (?) (Cox and Singer, 1986; model 19a).

Comment (Exploration): Status = Inactive

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): Gilbert, W.G., 1981, Preliminary geologic map of the Cheeneetnuk River area, Alaska: Alaska Division of Geological and Geophysical Surveys Open-File Report 153, 19 pages, 2 sheets, 1:63,360 scale.

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