Ikalooksik River

The Ikalooksik River is a copper 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: Ikalooksik River

Commodity

Primary: Copper

Location

State: Alaska
District: Bering Sea

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

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Not available

Comments

Comment (Workings): Workings / Exploration = Of the 21 stream sediment samples along this drainage, 18 have 100 to 150 ppm copper, all have 300 to 1,000 ppm vanadium, all have 30 to 100 ppm Ni, and 20 contain 1,500 to 5,000 ppm Mn (Patton and Csejtey, 1972). Nineteen of these samples have chromium values between 100 and 300 ppm.

Comment (Exploration): Status = Inactive

Comment (Deposit): Model Name = Disseminated sufide minerals in gabbro.

Comment (Reference): Primary Reference = Patton and Csejtey, 1972

Comment (Geology): Age = Original, disseminated sulfide minerals in gabbro would be Triassic to Permian in age based on the results of two K/Ar age determinations on associated intrusive rocks (221 +/- 7 and 244 +/- 7 Ma; Patton and Csejtey, 1980).

Comment (Geology): Geologic Description = Stream sediments collected along the main drainage of the Ikalooksik River, over a distance of 8 miles, have low but anomalous levels of copper, vanadium, nickel, and manganese. Of the 21 stream sediment samples along this drainage, 18 have 100 to 150 ppm copper, all have 300 to 1,000 ppm vanadium, all have 30 to 100 ppm Ni, and 20 contain 1,500 to 5,000 ppm Mn (Patton and Csejtey, 1972). Nineteen of these samples have chromium values between 100 and 300 ppm. These widespread slightly elevated metal values probably reflect a general characteristic of the bedrock in the drainage area. ??The bedrock in this drainage is a Triassic to Permian age assemblage characterized by gabbro and diabase intrusions (Patton and Csejtey, 1980). Gabbro samples from this assemblage along the Okok River (see SL012) contain disseminated chalcopyrite and up to 700 ppm copper (Patton and Csejtey, 1971, p. C15). Samples of gabbro from along the Ikalooksik River are not available but the slightly elevated metal contents in stream sediments throughout this drainage probably reflect the presence of gabbro intrusions here.?

References

Reference (Deposit): Cobb, E.H., 1972, Metallic mineral resources map of the Saint Lawrence quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-465, 1 sheet, scale 1:250,000.

Reference (Deposit): Cobb, E.H., 1980, Summaries of data and lists of references to metallic and selected nonmetallic mineral deposits in fifteen quadrangles in southwestern and west-central Alaska: U.S. Geological Survey Open-File Report 80-909, 103 p.

Reference (Deposit): Patton, W.W., Jr., and Csejtey, Bela, Jr., 1980, Geologic map of St. Lawrence Island, Alaska: U.S. Geological Survey Miscellaneous Investigation Series Map I-1203, scale 1:250,000.

Reference (Deposit): Patton, W.W., Jr., and Csejtey, Bela, Jr., 1972, Analyses of stream sediment and rock samples from St. Lawrence Island, Alaska, 1966-1971: U.S. Geological Survey Open-File Report 72-293, 78 p.

Reference (Deposit): Patton, W.W., Jr., and Csejtey, Bela, Jr., 1971, Preliminary geologic investigations of western St. Lawrence Island, Alaska: U.S. Geological Survey Professional Paper 684-C, p. C1-C15.

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