The Unnamed (north of Glacier Bay Monument) 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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Unnamed (north of Glacier Bay Monument) MRDS details
Site Name
Primary: Unnamed (north of Glacier Bay Monument)
Commodity
Primary: Molybdenum
Location
State: Alaska
District: Juneau (Skagway subdistrict)
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
Not available
Rocks
Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Late Cretaceous
Analytical Data
Not available
Materials
Ore: Molybdenite
Comments
Comment (Reference): Primary Reference = Winkler and MacKevett, 1970
Comment (Exploration): Status = Inactive
Comment (Geology): Geologic Description = Samples BD 548A and BD 548B of Winkler and MacKevett (1970) are described as 'Biotite granodiorite (?) with molybdenite disseminations'. Sample BD 548B contained 15 ppm Mo. The Cretaceous age of the host intrusive (Gilbert, 1988) establishes a maximum age for the deposit.
Comment (Deposit): Model Name = This is only an occurrence and there is very little information on it. The mineralization may be related to a porphyry copper system. The description from Winkler and MacKevett (1970) appears to be too mafic an association for a Climax type Mo deposit.
Comment (Geology): Age = The age is Cretaceous or younger, based upon the age of the host intrusive (Gilbert, 1988).
References
Reference (Deposit): Gilbert, W.G., 1988, Preliminary geology and geochemistry of the north Chilkat Range: Alaska Division of Geological and Geophysical Surveys Report of Investigations 88-8, 2 sheets, scale 1:36,200.
Reference (Deposit): Cobb, E.H., 1972, Metallic mineral resources map of the Skagway quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-424, 1 sheet, scale 1:250,000.
Reference (Deposit): Winkler, G.R., and MacKevett, E.M., Jr., 1970, Analyses of bedrock and stream-sediment samples from the Haines-Porcupine region, southeastern Alaska: U.S. Geological Survey Open-File Report 369, 91 p., 1 sheet, scale 1:125,000.
Reference (Deposit): Berg, H.C., 1984, Regional geologic summary, metallogenesis, and mineral resources of southeastern Alaska: U.S. Geological Survey Open-file Report 84-572, 298 p., 1 plate, scale approx. 1:600,000.
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