The Nikolai 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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Nikolai MRDS details
Site Name
Primary: Nikolai
Commodity
Primary: Copper
Location
State: Alaska
District: Nizina
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
Not available
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Name: Greenstone
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Triassic
Name: Greenstone
Role: Associated
Age Type: Host Rock Unit
Age Young: Late Triassic
Name: Greenstone
Role: Associated
Age Type: Associated Rock
Age Young: Late Triassic
Analytical Data
Not available
Materials
Ore: Chalcopyrite
Ore: Bornite
Gangue: Quartz
Gangue: Pyrrhotite
Gangue: Pyrite
Gangue: Epidote
Gangue: Calcite
Comments
Comment (Workings): Workings / Exploration = Deposit known to natives in late 1800's. Developed in 1899 by open cuts and more than 100 m underground workings but little work since. Mostly inaccessible by 1943. Surface and underground workings.
Comment (Deposit): Model Name = Vein, replacement, shear zone
Comment (Geology): Geologic Description = Two Cu-bearing veins, each less than 1 m thick, in shear zones in Triassic Nikolai Greenstone about 150 ft below base of Chitistone Limestone and just north of major fault. Veins mainly bornite and chalcopyrite, and minor pyrite, pyrrhotite and secondary Cu and Fe minerals in a quartz-calcite-epidote gangue.
Comment (Reference): Primary Reference = Miller, 1946
Comment (Exploration): Status = Inactive
Comment (Geology): Age = Cretaceous
References
Reference (Deposit): Miller, D.J., 1946, Copper deposits of the Nizina district, Alaska: U.S. Geological Survey Bulletin 947F, p. 93-120.
Reference (Deposit): MacKevett, E.M., Jr., 1976, Mineral deposits and occurrences in the McCarthy quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-773-B, scale 1:250,000.
Reference (Deposit): MacKevett, E.M., Jr., 1974, Geologic map of the McCarthy B-5 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ-1146, scale 1:63,360.
Reference (Deposit): MacKevett, E.M., Jr., and Smith, J.G., 1968, Distribution of gold, copper, and some other metals in the McCarthy B-4 and B-5 quadrangles, Alaska: U.S. Geological Survey Circular 604, 25 p.
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