Unnamed

The Unnamed is a molybdenum 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

Commodity

Primary: Molybdenum

Location

State: Alaska
District: Petersburg

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: Skarn Zn-Pb
Model Name: Skarn Fe

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Formation of calc-silicate skarn in amphibolite country rock

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Molybdenite
Gangue: Garnet
Gangue: Quartz
Gangue: Diopside

Comments

Comment (Reference): Primary Reference = Elliott and Koch, 1981

Comment (Deposit): Model Name = Skarn

Comment (Deposit): Other Comments = This occurrence is in Misty Fiords National Monument

Comment (Exploration): Status = Inactive

Comment (Geology): Geologic Description = The country rocks in the general area of this occurrence are Mesozoic or Paleozoic paragneiss and orthogneiss, and subordinate amphibolite and marble (Elliott and Koch, 1981; Koch, 1997). ? the mineral occurrence consists of small, irregular pods of garnet-diopside skarn containing 1% disseminated molybdenite (Elliott and Koch, 1981, loc. 11). The skarn, which is accompanied by calc-silicate rock, forms pods and discontinuous disrupted layers(?) in amphibolite. The molybdenite occurs as minute discrete flakes in the skarn, and in and near glassy quartz veinlets (Koch, 1997, p. 31). Pelitic paragneiss about 1.5 miles north of this occurrence contains disseminated minute flakes of molybdenite, and geochemically anomalous Ag and Sn (Koch, 1997, p. 31). Koch (1997, p. 30-32) also reports anomalous values of Ag, Au, Cu, Mo, Sn, and Zn in a few geochemical samples collected by the U. S. Geological Survey in the late 1970's near this occurrence.

Comment (Workings): Workings / Exploration = Pelitic paragneiss about 1.5 miles north of this occurrence contains disseminated minute flakes of molybdenite, and geochemically anomalous Ag and Sn (Koch, 1997, p. 31). Koch (1997, p. 30-32) also reports anomalous values of Ag, Au, Cu, Mo, Sn, and Zn in a few geochemical samples collected in the area near this occurrence by the U.S.Geological Survey in the late 1970's.

References

Reference (Deposit): Koch, R.D., 1997, Metalliferous mineral resource potential in the Bradfield Canal quadrangle, southeastern Alaska: U.S. Geological Survey Open-File Report 97-271, 57 p., 1 sheet, scale 1:250,000.

Reference (Deposit): Elliott, R.L., and Koch, R.D., 1981, Mines, prospects, and selected metalliferous mineral occurrences in the Bradfield Canal quadrangle, Alaska: U.S. Geological Survey Open-File Report 81-728-B, 23 p., 1 sheet, scales 1:250,000 and 1:63,360.

Reference (Deposit): Koch, R.D., 1996, Reconnaissance geologic map of the Bradfield Canal quadrangle, southeastern Alaska: U.S. Geological Survey Open-File Report 81-728-A, 35 p., 1 sheet, scale 1:250,000.

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