Montana · Lewis and Clark County
Past Producer
Bald Butte Mine
Lewis and Clark County, Montana, United States
Gold
Silver
Copper
Lead
Fluorine-Fluorite
Molybdenum
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USGS source ↗
Commodities
Primary
Gold, Silver
Secondary
Copper, Lead
Tertiary
Fluorine-Fluorite, Molybdenum
Commodity type
B
Deposit
Deposit type
Polymetallic veins
Model
85: Polymetallic veins
Deposit size
S
Workings
Surface/Underground
Orebody form
STRATA-BOUND
Materials
Ore minerals
Fluorite, Galena, Molybdenite, Sphalerite
Gangue
Pyrite, Quartz, Sericite
Geology
Host rock
Limestone · Helena Limestone
Associated rock
Diorite · Belmont Prophyry;Marysville Stock
Structure
Boulder Batholith, Prickly Pear Dome, Marysville Stock, Post-Mineral Downthrown Fault Blocks
Tectonic setting
Cordilleran Miogeosyncline
Alteration
Sericitization, Fluoritization
Economic & production
Development status
Past Producer
Identification
Deposit ID
10071364
MRDS ID
W014705
Region
NA
Data score
B
Coordinates
46.72268, -112.34728
References
MBMG BULL 28, P. 6, 22, 23.USGS BULL 955-E, P. 220.USGS BULL 527.USGS PP 57, P. 178KNOPF, 1913, U.S.G.S. BULL. 527