The Cobol Gold Mine is a gold mine located in Alaska at an elevation of 554 feet.
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
Elevation: 554 Feet (169 Meters)
Commodity: Gold
Lat, Long: 57.49361, -135.86806
Map: View on Google Maps
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MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.
Cobol Gold Mine MRDS details
Site Name
Primary: Cobol Gold Mine
Commodity
Primary: Gold
Tertiary: Lead
Location
State: Alaska
District: Chichagof
Land Status
Land ownership: National Forest
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.
Holdings
Not available
Workings
Type: Underground
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1937
Discovery Year: 1925
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
Not available
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Analytical Data: 57 FT. UNDERGROUND ZONE AVERAGE 0.28 OZ/TON AU FOR 3 FT. MINING WIDTH-USGS MF-1476-B, P.
Materials
Ore: Galena
Gangue: Pyrite
Comments
Comment (Location): USGS MF-1476-B, LOC. 21; USGS MF-467, LOC. 44 LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).
Comment (Development): 5 CLAIMS ESTABLISHED IN 1928, TWO TUNNELS DRIVEN. PRODUCTION REPORTED IN 1937 (MAY HAVE BEEN SOME EARLIER). CLAIMS STILL ACTIVE AS OF 1982.
Comment (Workings): LOWER TUNNEL 1,330 FT. LONG, UPPER TUNNEL 50 FT. LONG.
Comment (Geology): SOME FAULT MOVEMENT WAS LATER THAN DEPOSITION OF ORE MINERALS, AS SHOWN BY PYRITE AND GOLD SMEARED ALONG FAULT SURFACES.
Comment (Deposit): TUNNELS DRIVEN ALONG FAULT ZONE IN GRAYWACKE. LIGHT-COLORED DIKE ROCK SLICED INTO LENSES BY FAULT MOVEMENT. VEIN IN FAULT IS UP TO 1 FT. THICK AND COMPOSED OF GOUGE, MILKY RIBBON QUARTZ, WITH PYRITE, GALENA, GOLD. GOLD ALSO IN FRACTURES IN DIKE.
References
Reference (Deposit): USGS MF-1476-B, LOC. 21, P. 6 (1982)
Reference (Deposit): USGS B 929, P. 139-140 (1941)
Reference (Deposit): USGS OF 78-450, P. 35 (1978)
Reference (Deposit): USGS MF-467, LOC. 44 (1972)
Reference (Deposit): USBM OFR 20-73, LOC. 9 (1978)
Reference (Other Database): BAG-MF-1476-B-21
The Top Ten Gold Producing States
These ten states contributed the most to the gold production that built the West from 1848 through the 1930s. The Top Ten Gold Producing States.
