Montana · Granite County
Past Producer
Gold Reef Mine
Granite County, Montana, United States
Gold
Silver
Copper
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USGS source ↗
Commodities
Primary
Gold
Secondary
Silver, Copper
Commodity type
M
Deposit
Deposit size
S
Workings
Underground
Materials
Ore minerals
Chalcopyrite, Gold
Gangue
Hematite, Iron, Magnetite, Pyrite, Quartz
Geology
Host rock
Shale,Sandstone · Missoula Group
Alteration
Oxidation
Economic & production
Development status
Past Producer
Identification
Deposit ID
10019400
MRDS ID
DC09940
Region
NA
Data score
B
Coordinates
46.38072, -113.19897
References
USGS PP 78, P. 250MBMG BULL 82, P. 8.