Montana · Lewis and Clark County
Past Producer
Helena District
Lewis and Clark County, Montana, United States
Gold
Silver
Copper
Lead
Zinc
Stone
Tungsten
Arsenic
Marble
Dimension
Dolomite
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USGS source ↗
Commodities
Primary
Gold, Silver
Secondary
Copper, Lead, Zinc, Stone
Tertiary
Tungsten, Arsenic, Marble, Dimension, Dolomite
Commodity type
B
Deposit
Deposit size
L
Materials
Ore minerals
Chalcopyrite, Galena, Gold, Limestone
Gangue
Calcite, Pyrite, Quartz
Geology
Host rock
Quartz Monzonite,Limestone,Andesite · Madison Group
Associated rock
Quartz Monzonite · Butte Quartz Monzonite (Boulder Batholith);Elkhorn Mountain Volcanics
Structure
Boulder Batholith
Economic & production
Development status
Past Producer
Discovery year
1864
Identification
Deposit ID
10008989
MRDS ID
D001593
Region
NA
Data score
B
Coordinates
46.55823, -112.08421
References
MBMG BULL 16, P. 7.USGS BULL 842, P. 202-09.USBM R1 6334, P. 25-6.USGS BULL 527, P. 85-7.USGS PP 610, P. 155.MBMG MEM 26, P. 43.USGS-USBM YEARBOOKSMBMG BULL 94.USGS PP 610, P. 155; USGS-USBM YEARBOOKS. MBMG BULL 94.