The Halibut Bay 50 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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Halibut Bay 50 MRDS details
Site Name
Primary: Halibut Bay 50
Commodity
Primary: Chromium
Location
State: Alaska
District: Kodiak
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: Podiform chromite (major)
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: The ultramafic country rock is serpentinized?
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Chromite
Comments
Comment (Reserve-Resource): Reserves = the deposit is estimated to contain 26,000 tons of rock grading 6 percent chromite.
Comment (Workings): Workings / Exploration = The deposit is estimated to contain 26,000 tons of rock grading 6 percent chromite. A bulk sample had a head grade of 21.2 percent chromite and a gravity concentrate grade of 53.5 percent chromite, with a chrome:iron ratio of 2.6.
Comment (Geology): Geologic Description = At this chromite occurrence, one of several in the Halibut Bay ultramafic complex, chromite is present as bands less than 1 inch in thickness, as disseminations, and as massive segregations up to 6 inches across. The mineralized zone is inferred to measure 450 by 5 feet and to have a dip length of 112 feet. The zone strikes N. 5 W. and dips 55 W. The deposit is estimated to contain 26,000 tons of rock grading 6 percent chromite (Foley and Barker, 1985, table 13). A channel sample across a 3-foot stringer zone assayed 14.84 percent chrome. A bulk sample had a head grade of 21.2 percent chromite and a gravity concentrate grade of 53.5 percent chromite. The concentrate had a chrome:iron ratio of 2.6 and contained traces of silver, gold, platinum, and palladium (Dahlin and others, 1985, table A-30). Small showings of chromite were observed 70 feet upslope and 200 feet downslope from the main zone. ? the Halibut Bay ultramafic complex, consisting mostly of gabbro, dunite, pyroxenite, and peridotite, occurs within sedimentary units of the Uyak formation of Cretaceous age.
Comment (Deposit): Other Comments = Site is located within Kodiak National Wildlife Refuge.
Comment (Deposit): Model Name = Podiform chromite (Cox and Singer, 1986; model 8b).
Comment (Exploration): Status = Inactive
Comment (Reference): Primary Reference = Foley and Barker, 1985
References
Reference (Deposit): Foley, J.Y., and Barker, J.C., 1985, Chromite deposits along the Border Ranges fault, part 1, Field investigations and descriptions of chromite deposits: U.S. Bureau of Mines Information Circular 8990, 58 p.
Reference (Deposit): Dahlin, D.C., Kirby, D.E., and Brown, L.L., 1985, Chromite deposits along the Border Ranges fault, southern Alaska, part 2, Mineralogy and results of beneficiation tests: U.S. Bureau of Mines Information Circular 8991, 37 p.
Reference (Deposit): Foley, J.Y., Burns, L.E., Schneider, C.L., and Forbes, R.B., 1989, Preliminary report of platinum group element occurrences in Alaska: Alaska Division of Geological and Geophysical Surveys Public Data File 89-20, 32 p., 1 map sheet, scale 1:2,500,000.
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