The Ikoygak Creek is a chromium 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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Ikoygak Creek MRDS details
Site Name
Primary: Ikoygak Creek
Commodity
Primary: Chromium
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
Ore: Chromite
Comments
Comment (Exploration): Status = Inactive
Comment (Geology): Age = If chromite deposits are present, they are probably related to intrusive rocks within the Triassic to Permian age mafic assemblage as suggested by Patton and Csejtey (1980).
Comment (Reference): Primary Reference = Patton and Cjestey, 1972
Comment (Workings): Workings / Exploration = None
Comment (Deposit): Model Name = Placer concentration of chromite.
Comment (Geology): Geologic Description = Three stream sediment samples on the lower part of this drainage contain 5,000 ppm chromium (Patton and Csejtey, 1972). This is an area of Quaternary surficial deposits and the concentration of chromium here could be in part related to alluvial or marine processes. Patton and Csejtey (1980) suggest that these high chromium values could indicate the presence of ultamafic rocks within a Triassic to Permian age mafic assemblage that is exposed at the surface 8 miles southeast of Ikoygak Creek. Patton and Csejtey (1980) also indicate that offshore dredge data support this interpretation but the source of this information (or the nature of the dredge data) is not indicated.
References
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): 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): 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.
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