The Kontrashibuna (Lake) 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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Kontrashibuna (Lake) MRDS details
Site Name
Primary: Kontrashibuna (Lake)
Commodity
Primary: Molybdenum
Secondary: Copper
Secondary: Zinc
Location
State: Alaska
District: Bristol Bay
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: Porphyry Mo, low-F
Model Name: Porphyry Cu-Mo
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Unknown
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Molybdenite
Ore: Pyrite
Gangue: Quartz
Comments
Comment (Exploration): Status = Inactive
Comment (Production): Production Notes = No production
Comment (Reference): Primary Reference = Nelson and others, 1985
Comment (Reserve-Resource): Reserves = No reserves
Comment (Deposit): Model Name = Porphyry Cu-Mo? or Porphyry Mo, Low F ? (Cox and Singer, 1986; models 21a ? or 21b ?)
Comment (Deposit): Other Comments = Site is in Lake Clark National Park and Preserve.
Comment (Geology): Geologic Description = The occurrence consists of quartz-pyrite veins containing coarse molybdenite and other sulfide minerals, near the contact of Tertiary mafic volcanic rocks with an intruding Tertiary granitic body. The veins cut the volcanic rocks, but mineralization dies out when veins enter the nearby granite. Also, much iron-staining, gouge, and mylonite along a NE-trending fault. Eakins (1970, Area H) reports that sediment samples in the vicinity yielded values of up to 240 ppm Cu, 50 ppm Mo, 290 ppm Pb, and 980 ppm Zn. Area I of Eakins, 1.2 km NW of this location, produced stream sediment samples with values of up to 240 ppm Cu, 50 ppm Mo, and 440 ppm Pb. Eakins also reports a sample of molybdenite-bearing granite float. A rock sample from the NE-trending fault yielded 8.5 ppm Ag and 2,000 ppm Pb. Resource Associates of Alaska (1976) proposed that the geology may indicate a copper-molybdenum stockwork porphyry.
Comment (Geology): Age = Tertiary or younger.
Comment (Workings): Workings / Exploration = Eakins (1970, Area H) reports that sediment samples in the vicinity yielded values of up to 240 ppm Cu, 50 ppm Mo, 290 ppm Pb, and 980 ppm Zn. Area I of Eakins (1970), 1.2 km NW of this location, produced stream sediment samples with values of up to 240 ppm Cu, 50 ppm Mo, and 440 ppm Pb. Eakins also reports a sample of molybdenite-bearing granite float. A rock sample from the NE-trending fault yielded 8.5 ppm Ag and 2,000 ppm Pb.
References
Reference (Deposit): MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous mineral deposits in the western part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-F, 38 p., 1 sheet, scale 1:1,000,000.
Reference (Deposit): Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Iliamna, Lake Clark, Lime Hills, and McGrath quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-485.
Reference (Deposit): Resource Associates of Alaska, Inc., 1976, Geology and geochemistry of certain land within the Lake Clark National Park: Contract report for U.S. Bureau of Mines, 109 p.
Reference (Deposit): Cobb, E.H., and Reed, B.L., 1981, Summaries of data on and lists of references to metallic and selected nonmetallic mineral occurrences in the Iliamna, Lake Clark, Lime Hills, and McGrath quadrangles, Alaska - Supplement to Open-File Report 76-485: U.S. Geological Survey Open-File Report 81-1343-B, 20 p.
Reference (Deposit): Cobb, E.H., 1972, Metallic mineral map of the Lake Clark quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-378, 1 sheet, scale 1:250,000.
Reference (Deposit): Cobb, E.H., and Reed, B.L., 1981, Summaries of data on and lists of references to metallic and selected nonmetallic mineral occurrences in the Iliamna, Lake Clark, Lime Hills, and McGrath quadrangles, Alaska - Supplement to Open-File Report 76-485: U.S. Geological Survey Open-File Report 81-1343-A, 25 p.
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