Montana · Missoula County
Past Producer
Triangle and Grass Widow Mines
Missoula County, Montana, United States
Copper
Silver
Gold
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USGS source ↗
Commodities
Primary
Copper
Secondary
Silver, Gold
Commodity type
M
Deposit
Deposit size
S
Ore control
Parallel Fractures
Materials
Ore minerals
Ankerite, Chalcopyrite, Gold, Specularite
Gangue
Calcite, Quartz
Geology
Host rock
Diorite
Associated rock
Diorite · Clinton Stock
Structure
Bearmouth Overthrust, Clinton Stock
Alteration
Sericitization, Oxidation
Economic & production
Development status
Past Producer
Identification
Deposit ID
10102020
MRDS ID
DC11199
Alternate names
Morning Mine
Region
NA
Data score
B
Coordinates
46.79045, -113.66844
References
USGS BULL 660 P. 228-9.MBMG BULL 8, P. 36-37.