Unnamed (on Rapid River)

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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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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