The Unnamed (near Hamilton Creek) is a uranium 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 (near Hamilton Creek) MRDS details
Site Name
Primary: Unnamed (near Hamilton Creek)
Commodity
Primary: Uranium
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
Model Name: Phosphate, warm current type
Model Name: Phosphate, upwelling type
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Carbonate-Fluorapatite
Comments
Comment (Production): Production Notes = None
Comment (Exploration): Status = Probably inactive
Comment (Reference): Primary Reference = Dickinson, 1979 (OF 79-1316)
Comment (Geology): Age = Permian based on age of host rock.
Comment (Geology): Geologic Description = A sedimentary uranium deposit associated with chemically precipitated, marine phosphorite that contains carbonate fluorapatite as the uranium- bearing mineral (Dickinson, 1979). Fragments of laminated phosphate rock occur in white calcite veins in a fine grained, light to dark gray, laminated, apatite-bearing silty dolomite. Radioactivity reaches 20 times background in a 0.5 m thick bed. One sample of more highly radioactive rock indicated beta eU of 80, plus-or-minus 24 ppm uranium. Unit poorly exposed. Dickinson (1979) tentatively assigned the dolomite to the Permian Cannery Formation. More recent work by Brew and others (1984) indicates that the Cannery Formation is of Mississippian and Devonian age and by Karl (personal communication, 1998) indicates that the Cannery is probably Mississippian and Permian in age. Brew and others (1984), however, recently assign the rocks in the vicinity of the occurrence to the Permian Pybus Formation, a sequence of limestone, dolomite, and chert that outcrops widely on Kuiu and Kupreanof Islands.
Comment (Workings): Workings / Exploration = None apparently; occurrence exposed in a quarry for road metal.
Comment (Deposit): Model Name = Sedimentary phosphate (Cox and Singer, 1984; model 34c or 34d)
Comment (Reserve-Resource): Reserves = None
Comment (Deposit): Other Comments = Likely that the Pybus Formation elsewhere in the vicinity has beds or lenses of marine phosphorite.
References
Reference (Deposit): Dickinson, K.A., 1979, Uraniferous phosphate occurrence on Kupreanof Island, southeast Alaska: U.S. Geological Survey Open-File Report 79-1316, 2 p.
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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