Montana · Jefferson County
Past Producer
Free Coinage Mine
Jefferson County, Montana, United States
Silver
Lead
Zinc
Gold
Copper
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USGS source ↗
Commodities
Primary
Silver, Lead
Secondary
Zinc, Gold, Copper
Commodity type
M
Deposit
Deposit size
S
Workings
Underground
Materials
Ore minerals
Gold
Geology
Host rock
Quartz Monzonite
Associated rock
Quartz Monzonite · Butte Quartz Monzonite (Boulder Batholith)
Structure
Boulder Batholith
Economic & production
Development status
Past Producer
Identification
Deposit ID
10019816
MRDS ID
DC11629
Alternate names
Little Alma Mine
Region
NA
Data score
B
Coordinates
46.48601, -112.03338
References
MBMG BULL 16, P. 41-2.USGS PP 428, P. 63, 64, 66.MBMG BULL 16, P. 42