Montana · Beaverhead County
Past Producer
Blue Grass Mine
Beaverhead County, Montana, United States
Gold
Silver
Tellurium
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USGS source ↗
Commodities
Primary
Gold, Silver
Tertiary
Tellurium
Commodity type
M
Deposit
Deposit type
Contact Metasomatic
Deposit size
S
Workings
Surface/Underground
Ore control
Granodiorite/Limestone Contact
Materials
Ore minerals
Tetradymite
Gangue
Calcite, Epidote, Garnet, Pyrite, Quartz, Specularite
Geology
Host rock
Limestone · Madison
Associated rock
Diorite · Bannack Stock
Structure
Overthrust Fault Zone Is Exposed In Mine. Dike Trends N50e; 60n.
Alteration
Garnetization, Oxidation
Economic & production
Development status
Past Producer
Production years
PRE-1930
First production
1863
Discovery year
1863
Identification
Deposit ID
10019759
MRDS ID
DC11403
Region
NA
Data score
B
Coordinates
45.15962, -112.97478
References
MBMG BULL 6, P. 42-43.MBMG BULL 85, P. 81-83.1931 COMPILE M.B.M.G. BULL. 61972 COMPILE M.B.M.G. BULL. 85