The Unnamed (on Rapid River) is a tin 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 (on Rapid River) MRDS details
Site Name
Primary: Unnamed (on Rapid River)
Commodity
Primary: Tin
Location
State: Alaska
District: Port Clarence
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Prospect
Operation Type: Unknown
Years of Production:
Organization:
Significant:
Physiography
Not available
Mineral Deposit Model
Model Name: Alluvial placer Sn
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Cassiterite
Comments
Comment (Workings): Workings / Exploration = Two USBM churn-drill holes have been completed here (Mulligan, 1959).
Comment (Reference): Primary Reference = Mulligan, 1959 (USBM RI 5520)
Comment (Geology): Geologic Description = Bedrock in the 7-mile long southeast flowing Rapid River and its tributary drainages includes various Ordovician limestone facies and local mafic and felsic dikes (Sainsbury, 1969). The two USBM churn-drill holes in the lower part of the river encountered relatively thick gravels for the area; 23 feet of gravel over limestone bedrock in one and more than 30.5 feet of gravel in the other (bedrock was not encountered). Heavy mineral concentrates from both churn-drill holes indicate a trace of tin in the gravels (Mulligan, 1959, p. 13). The mineralogy of the concentrates was not determined. Mulligan (1959, 12-13) notes that the gravel thickness decreases to only a few feet a short distance upstream from the drill holes.
Comment (Deposit): Model Name = Alluvial tin placer (Cox and Singer, 1986; model 39e)
Comment (Exploration): Status = Inactive
Comment (Geology): Age = Quaternary
References
Reference (Deposit): Sainsbury, C.L., 1969, Geology and ore deposits of the central York Mountains, western Seward Peninsula, Alaska: U.S. Geological Survey Bulletin 1287, 101 p.
Reference (Deposit): Mulligan, J.J., 1959, Sampling stream gravels for tin, near York, Seward Peninsula, Alaska: U.S. Bureau of Mines Report of Investigations 5520, 25 p.
Reference (Deposit): Cobb, E.H., and Sainsbury, C.L., 1972, Metallic mineral resource map of the Teller quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-426, 1 sheet, scale 1:250,000.
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