The Bear Mine is a gold 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
Satelite View
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.
Bear Mine MRDS details
Site Name
Primary: Bear Mine
Commodity
Primary: Gold
Tertiary: Copper
Location
State: Alaska
District: Juneau/Berner'S Bay
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: Surface/Underground
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1895
Year Last Production: 1897
Discovery Year: 1891
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
Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Pliocene
Name: Diorite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Pliocene
Analytical Data
Analytical Data: NO DATA AVAILABLE
Materials
Ore: Chalcopyrite
Gangue: Quartz
Gangue: Sericite
Gangue: Pyrite
Gangue: Calcite
Comments
Comment (Location): LOCATION OBTAINED FROM UNPUBLISHED MINES AND PROSPECTS MAP; SEE USGS OFR 85-717, NO. J LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).
Comment (Production): 5500 TONS MINED, 1895-1897; ONLY 62% RECOVERY USGS BULL 284, P.32
Comment (Deposit): 2 PYRITE AND CHALCOPYRITE BEARING AURIFEROUS QUARTZ VEINS IN DIORITE; BEAR VEIN: 2-5 FT WIDE, INTERSECTED BY TUNNEL 200 FT BELOW OUTCROP; OTHER VEIN SMALLER; PYRITE AND QUARTZ STRINGERS IN ALTERED WALL ROCK
Comment (Workings): TUNNEL 1100 FT LONG; STOPES ON 3 LEVELS, MAINLY ON BEAR VEIN
Comment (Geology): DEPOSIT IS IN CHLORITZED, EPIDOTIZED DIORITE
Comment (Deposit): SEE ALSO: KENSINGTON, COMET, JOHNSON, EUREKA ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT
Comment (Development): MINED IN 1895-1897; CONSOLIDATED WITH KENSINGTON, 1915
References
Reference (Deposit): USGS 18TH ANNUAL REPORT, PART 3, P. 62-63
Reference (Deposit): USGS BULL 284, P. 32
Reference (Deposit): USGS BULL 446, P. 39-40
Reference (Deposit): USGS BULL 442, P. 77
Reference (Deposit): USGS BULL 1246, P. 160
Reference (Deposit): USGS OFR 85-717, NO. J092
Reference (Other Database): BAG-OFR-85-717-092
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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.
