Montana · Jefferson County
Past Producer
Boulder Mine
Jefferson County, Montana, United States
Silver
Zinc
Gold
Lead
Copper
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USGS source ↗
Commodities
Primary
Silver, Zinc, Gold
Secondary
Lead, Copper
Commodity type
M
Deposit
Deposit size
S
Workings
Unknown
Ore control
Fault Zone That Cuts Quartz Monzonite
Materials
Ore minerals
Chalcopyrite, Galena, Gold, Malachite, Sphalerite
Gangue
Limonite, Pyrite, Quartz
Geology
Host rock
Quartz Monzonite
Associated rock
Quartz Monzonite,Latite · Lowland Creek Volcanics (Boulder Batholith);Butte Quartz Monzonite
Structure
Fault Zone Trends N75w, Dips 70-85 S
Alteration
Oxidized (Oxidation Of Sulfide Minerals)
Economic & production
Development status
Past Producer
First production
1881
Identification
Deposit ID
10015884
MRDS ID
DB02159
Region
NA
Data score
B
Coordinates
46.27879, -112.28921
References
MBMG BULL 16, P. 22, 24, 100.USGS BULL 1151, P. 100, PL. 1.MBMG BULL 33, P. 13MBMG BULL 16, USGS BULL 1151.