Montana · Powell County
Past Producer
Bonanza Mine
Powell County, Montana, United States
Lead
Silver
Gold
Copper
Zinc
Antimony
Arsenic
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USGS source ↗
Description
W. T. Zosell
Commodities
Primary
Lead, Silver, Gold
Secondary
Copper, Zinc
Tertiary
Antimony, Arsenic
Commodity type
M
Deposit
Deposit size
S
Workings
Underground
Ore control
Bedding Plane Fissure
Materials
Ore minerals
Chalcopyrite, Galena, Gold, Sphalerite, Tetrahedrite
Gangue
Ankerite, Pyrite, Quartz
Geology
Host rock
Basalt
Associated rock
Basalt · Elkhorn Mountain Volcanics
Structure
Boulder Batholith
Alteration
Includes Silicification And Pyritization And Minor Argillization And Sericitization. Porphyritic Basalt Has Been Kaolinized And Bleached.
Economic & production
Development status
Past Producer
Last production
1960
Discovery year
1895
Identification
Deposit ID
10019598
MRDS ID
DC10916
Region
NA
Data score
B
Coordinates
46.37934, -112.57089
References
MBMG BULL 98, P. 19, 57.MBMG BULL 25, P. 41.MBMG BULL 34, P. 18, 19.USGS BULL 842, P. 279-80.MBMG BULL 98, P 57.