Montana · Lewis and Clark County
Past Producer
Helena Mine
Lewis and Clark County, Montana, United States
Silver
Lead
Gold
Zinc
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USGS source ↗
Commodities
Primary
Silver, Lead
Secondary
Gold, Zinc
Commodity type
M
Deposit
Deposit type
Contact Metasomatic
Deposit size
S
Workings
Underground
Ore control
Near Igneous Intrusive Contact
Materials
Ore minerals
Galena, Gold
Geology
Host rock
Shale · Empire Shale
Associated rock
Quartz Monzonite · Scratchgravel Quartz Monzonite Stock
Structure
Boulder Batholith, Scratchgravel Quartz Monzonite Stock
Economic & production
Development status
Past Producer
Identification
Deposit ID
10015900
MRDS ID
DB02182
Region
NA
Data score
B
Coordinates
46.62684, -112.12505
References
USGS BULL 842, P. 57-58.MBMG BULL 14, P. 22.USGS BULL 842, P. 57.