The Colusa Mine is a copper mine located in Silver Bow county, Montana.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
Colusa Mine MRDS details
Site Name
Primary: Colusa Mine
Secondary: East Colusa Pit
Commodity
Primary: Copper
Secondary: Silver
Location
State: Montana
County: Silver Bow
District: Butte District
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Owner Name: The Anaconda Co.
Home Office: Hennessy Bldg., Butte, Mt.
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Mineral Deposit Model
Not available
Orebody
Form: THE VEIN CONTINUES W BEYOND THE GAMBETTA FAULT AS THE SHANNON VEIN. THE GRANITE ACCOMPANYING THE LODE IS GENERALLY WELL SERICITIZED AND PEPPERED WITH PYRITE
Structure
Type: R
Description: Boulder Batholith
Type: L
Description: N 65 E
Alterations
Not available
Rocks
Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock
Age Young: Pliocene
Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Pliocene
Analytical Data
Not available
Materials
Ore: Chalcocite
Ore: Enargite
Gangue: Quartz
Gangue: Pyrite
Gangue: Limonite
Comments
Comment (Deposit): THE VEIN CONTINUES W BEYOND THE GAMBETTA FAULT AS TH
Comment (Workings): PART OR ALL OF COLSA IS NOW IN THE BERKLEY PIT
References
Reference (Deposit): USGS PP 74, PL. X, P. 203.
Reference (Deposit): MBMG BULL 10, P. 60.
Reference (Deposit): USGS-USBM MINERAL YEARBOOKS 1955, 1956
Reference (Production): USGS-USBM MINERAL YEARBOOK; USGS PP 74
Principal Gold Districts of Montana
In Montana, 54 mining districts have each have produced more than 10,000 ounces of gold. The largest producers are Butte, Helena, Marysville, and Virginia City, each having produced more than one million ounces. Twenty seven other districts are each credited with between 100,000 and one million ounces of gold production. Read more: Principal Gold Districts of Montana.
