Montana · Granite County
Past Producer
Midnight Mine
Granite County, Montana, United States
Silver
Copper
Manganese
Barium-Barite
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USGS source ↗
Commodities
Primary
Silver
Secondary
Copper, Manganese
Tertiary
Barium-Barite
Commodity type
B
Deposit
Deposit type
Replacement Vein
Deposit size
S
Workings
Underground
Ore control
Silver In Gray Quartz
Materials
Ore minerals
Copper
Gangue
Barite, Calcite, Quartz
Geology
Host rock
Dolomite · Hasmark Formation
Associated rock
Diorite · Philipsburg Batholith
Structure
Philipsburg Batholith, Philipsburg Anticline, Philipsburg Overthrust
Economic & production
Development status
Past Producer
Identification
Deposit ID
10019796
MRDS ID
DC11561
Alternate names
Imperial
Region
NA
Data score
B
Coordinates
46.33545, -113.2712
References
USGS PP 78, P. 211.USGS BULL 1237.