The Unnamed occurrence (Inmachuk River) is a lead and silver 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 occurrence (Inmachuk River) MRDS details
Site Name
Primary: Unnamed occurrence (Inmachuk River)
Commodity
Primary: Lead
Primary: Silver
Location
State: Alaska
District: Fairhaven
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: A gossanous, limonitic cap is reportedly developed.
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Galena
Gangue: Limonite
Gangue: Magnetite
Gangue: Pyrite
Comments
Comment (Workings): Workings / Exploration = Anderson (1947) reports that some development work has taken place; surface prospecting pits are most likely.
Comment (Reference): Primary Reference = Cobb, 1975 (OFR 75-429)
Comment (Geology): Geologic Description = Mertie (1919) described a sample said to be from this occurrence as containing galena, magnetite, limonite, and pyrite. The galena was supposedly argentiferous. The gossanous character of the occurrence was reported by Anderson (1947), but its location and nature have not been confirmed. Bedrock of the area is a metasedimentary schist and marble sequence of Lower Paleozoic age (Till and others, 1986).
Comment (Deposit): Model Name = Galena in metasedimentary rocks; epigenetic (?); stratiform (?)
Comment (Deposit): Other Comments = All references to this site are from secondary sources and the site was not visited by USGS personnel during 1982 field work in the area.
Comment (Exploration): Status = Inactive
Comment (Geology): Age = Unknown
References
Reference (Deposit): Till, A.B., Dumoulin, J.A., Gamble, B. ., Kaufman, D.S., and Carroll, P.I., 1986, Preliminary geologic map and fossil data, Soloman, Bendeleben, and southern Kotzebue quadrangles, Seward Peninsula, Alaska: U.S. Geological Survey Open-File Report 86-276, 10 p., 3 plates, scale 1:250,000.
Reference (Deposit): Mertie, J.B., Jr., 1918, Lode mining and prospecting on Seward Peninsula: U.S. Geological Survey Bulletin 662-H, p. 425-449.
Reference (Deposit): Cobb, E.H., 1972, Metallic mineral resources map of the Bendeleben quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-417, 1 sheet, scale 1:250,000.
Reference (Deposit): Anderson, Eskil, 1947, Mineral occurrences other than gold deposits in northwestern Alaska: Alaska Territorial Division of Mines Pamphlet 5-R, 48 p.
Reference (Deposit): Cobb, E.H., 1975, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Bendeleben quadrangle, Alaska: U.S. Geological Survey Open-File Report 75-429, 123 p.
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