Montana · Granite County
Past Producer
Dewey Mine
Granite County, Montana, United States
Gold
Silver
Copper
Barium-Barite
Antimony
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USGS source ↗
Commodities
Primary
Gold
Secondary
Silver, Copper
Tertiary
Barium-Barite, Antimony
Commodity type
B
Deposit
Deposit size
S
Workings
Underground
Orebody form
IRREGULAR FLAT LENSES, BANDED
Materials
Ore minerals
Chalcopyrite, Gold, Tetrahedrite
Gangue
Barite, Limonite, Pyrite, Quartz, Sericite
Geology
Structure
Bearmouth Overthrust, Deep Creek Anticline, Garnet Stock
Alteration
Oxidation
Economic & production
Development status
Past Producer
Production years
INTERMITTENT
Identification
Deposit ID
10102019
MRDS ID
DC11186
Region
NA
Data score
B
Coordinates
46.82656, -113.34399
References
USGS BULL 660, P. 178-82MBMG MEM NO 31, P. 32