The Colbert is a tungsten 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
Colbert MRDS details
Site Name
Primary: Colbert
Secondary: Big Chief
Secondary: Pearl
Secondary: Triangle
Commodity
Primary: Tungsten
Location
State: Alaska
District: Fairbanks
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: W skarn
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Scheelite
Comments
Comment (Workings): Workings / Exploration = This prospect has been explored by trenches (Byers, 1957).
Comment (Geology): Geologic Description = The Colbert tungsten deposit consists of scheelite in and parallel to metasedimentary rocks that are intruded by porphyritic granite (Thorne and others, 1948, p. 4). Small amounts of scheelite are also disseminated in the granite. The ore lenses occupy parts of a 30-foot-thick calcareous bed in schist. The lode has been traced for approximately 2,000 feet; it varies in thickness. The mineralization pinches out in some places, but a zone as much as 50 feet wide was observed in one trench (Byers, 1957). The tungsten content of the ore shoots is 1.3 percent tungsten tri-oxide over an average width of 1.6 feet (Byers, 1957). This tungsten deposit is 1,000 feet south of and parallel to the Stepovich lode (FB113) (Berg and Cobb, 1967, p. 220).
Comment (Reference): Primary Reference = Byers, 1957
Comment (Exploration): Status = Inactive
Comment (Deposit): Model Name = W skarn deposit (Cox and Singer, 1986; model 14a)
References
Reference (Deposit): Thorne, R.L., Muir, N.M., Erickson, A.W., Thomas, B. I., Hedie, H. E., and Wright, W. S., 1948, Tungsten deposits of Alaska: U.S. Bureau of Mines Report of Investigation 4174, 51 p.
Reference (Deposit): Chapman, R.M., and Foster, R.L., 1969, Lode mines and prospects in the Fairbanks district, Alaska: U.S. Geological Survey Professional Paper 625-D, 25 p., 1 plate.
Reference (Deposit): Cobb, E.H., 1972, Metallic mineral resources map of the Fairbanks quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-410, 1 sheet, scale 1:250,000.
Reference (Deposit): Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Fairbanks quadrangle, Alaska: U.S. Geological Survey Open-File Report 76-662, 174 p.
Reference (Deposit): Joesting, H.R., 1943, Strategic mineral occurrences in interior Alaska, supplement to pamphlet no. 1: Alaska Territorial Department of Mines Pamphlet 2, 26 p.
Reference (Deposit): Thorne, R.L., Muir, N.M., Erickson, A.W., Thomas, B. I., Hedie, H. E., and Wright, W. S., 1948, Tungsten deposits of Alaska: U.S. Bureau of Mines Report of Investigation 4174, 22 p.
Reference (Deposit): Berg, H.C., and Cobb, E.H., 1967, Metalliferous Lode Deposits of Alaska. U.S. Geological Survey Bulletin 1246, 254 p.
Reference (Deposit): Byers, F.M., Jr., 1957, Tungsten deposits in the Fairbanks district, Alaska: U.S. Geological Survey Bulletin 1024-I, p. 179-216.
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