Unnamed (near Kushneahin Lake)

The Unnamed (near Kushneahin Lake) is a molybdenum and 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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MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Site Name

Primary: Unnamed (near Kushneahin Lake)

Commodity

Primary: Molybdenum
Primary: Copper

Location

State: Alaska
District: Kupreanof

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: Pyritization, silicification, and kaolinization (?).

Rocks

Not available

Analytical Data

Not available

Materials

Not available

Comments

Comment (Geology): Age = Quaternary or Tertiary.

Comment (Reference): Primary Reference = Grybeck, Berg, and Karl, 1984

Comment (Reserve-Resource): Reserves = None

Comment (Workings): Workings / Exploration = None other than probable examination by various industry geologists who have worked in the area.

Comment (Geology): Geologic Description = Extensive vivid exposures of yellow-orange altered rhyolite, rhyolite tuff, and rhyolitic glass of Quaternary or Tertiary age outcrop in creek bed and bluffs for at least one-half mile (Brew and others, 1984; Brew, 1997 [OF 97-156-K]). Briefly examined by the USGS in 1982 and 1996. Disseminated pyrite is present locally but no obvious signs of Cu, Mo, or other ore minerals. Several grab samples of the most-altered rhyolite and associated rocks show 5 ppm or less Cu and Mo. The pyrite and host rocks are part of a large felsic igneous system. The surrounding area is heavily wooded but aerial reconnaissance shows widespread evidence of similar iron-stained zones over an area at least several miles in diameter. Although no obvious mineralization has been found to date, the site is included because this altered zone is so large and so prominent and it indicates the presence of a very large felsic hydrothermal system.

Comment (Production): Production Notes = None

Comment (Exploration): Status = Inactive

References

Reference (Deposit): Brew, D.A., 1997, Reconnaissance geologic map of the Petersburg C-5 quadrangle, southeastern Alaska: U.S. Geological Survey Open-File Report 97-156-K, 18 p., 1 sheet, scale 1:63,360.

Reference (Deposit): Brew, D. A., Ovenshine, A. T., Karl, S. M., and Hunt, S. J., 1984, Preliminary reconnaissance geologic map of the Petersburg and parts of the Port Alexander and Sumdum 1:250,000 quadrangles, southeastern Alaska: U.S. Geological Survey Open-File Report 84-405, 43 p., 2 sheets, scale 1:250,000.

Reference (Deposit): Grybeck, D.J., Berg, H.C., and Karl, S.M., 1984, Map and description of the mineral deposits in the Petersburg and eastern Port Alexander quadrangles: U.S. Geological Survey Open-File Report 84-837, 86 p., 1 sheet, scale 1:250,000.

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