Montana · Lewis and Clark County
Producer
Free Speech Mine
Lewis and Clark County, Montana, United States
Lead
Silver
Gold
Arsenic
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USGS source ↗
Commodities
Primary
Lead, Silver
Secondary
Gold
Tertiary
Arsenic
Commodity type
M
Deposit
Deposit size
S
Orebody form
PINCH AND SWELL
Materials
Ore minerals
Galena, Gold
Gangue
Pyrite, Quartz
Geology
Host rock
Quartz Monzonite
Associated rock
Quartz Monzonite · Butte Quartz Monzonite (Boulder Batholith)
Structure
Boulder Batholith, Red Mountain Fault
Economic & production
Development status
Producer
Identification
Deposit ID
10108516
MRDS ID
DC11443
Alternate names
Free Speech No. 1 Mine
Region
NA
Data score
B
Coordinates
46.47407, -112.24256
References
USGS PP 428, P. 56.MBMG BULL 82, P. 13.USGS PP 428.