The Steward Mine is a copper, silver, and gold mine located in Silver Bow county, Montana at an elevation of 5,000 feet.
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
Elevation: 5,000 Feet (1,524 Meters)
Commodity: Copper, Silver, Gold
Lat, Long: 46.01889, -112.53556
Map: View on Google Maps
Satelite View
MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.
Steward Mine MRDS details
Site Name
Primary: Steward Mine
Commodity
Primary: Copper
Primary: Silver
Primary: Gold
Secondary: Zinc
Tertiary: Barium-Barite
Tertiary: Arsenic
Tertiary: Fluorine-Fluorite
Location
State: Montana
County: Silver Bow
District: Butte District
Land Status
Not available
Holdings
Not available
Workings
Type: Underground
Ownership
Owner Name: The Anaconda Co. Butte, Montana 59701
Owner Name: The Anaconda Co., Butte, Montana
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1880
Discovery Year: 1879
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Type: R
Description: Boulder Batholith
Type: L
Description: Rarus Fault
Alterations
Alteration Type: L
Alteration Text: Main Stage Hydrothermal Alteration
Rocks
Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock
Age Young: Late Cretaceous
Name: Quartz Monzonite
Role: Associated
Age Type: Host Rock
Age Young: Late Cretaceous
Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Cretaceous
Analytical Data
Analytical Data: AVERAGE ORE ASSEMBLAGE FROM THE DEEP LEVELS ARE ABOUT 40% BORNITE, 30% CHALCOPYRITE, 15% TENNANTITE, 10% ENARGITE, 5% CHALCOCITE.
Materials
Ore: Chalcopyrite
Ore: Bornite
Ore: Enargite
Ore: Chalcocite
Ore: Tennantite
Ore: Sphalerite
Gangue: Quartz
Gangue: Pyrite
Comments
Comment (Location): N OF ORIGINAL AND PARROTT MINES. W STEWARD IS THE MAIN SHAFT.
Comment (Deposit): E END OF MINE A LEAN QUARTZ-PRYRITE VEIN (BAILEY VEIN) WAS DEVELOPED. IT HAS A NW STRIKE. ON THE 400 FT LEVEL THE BAILEY VEIN IS CUT OFF BY THE STEWARD FAULT VEIN. BELOW THIS AT THE 600, 700 AND 800 FT LEVEL THE ACQUISITION VEIN. IT STRIKES N75E AND DIPS 70 S. THE STEWARD VEIN ON THE 900 FT LEVEL IS E-W ON THE 1100 FT LEVEL IT IS N 75 E. THE STEWARD VEIN IS CUT AND OFFSET IN THE LEFT-LATERAL SENSE BY SEVERAL SYSTEMS OF NW OR BLUE AGE VEINS STRIKING N40-60W AND DIPPING 35-70 SW (F.W. STEWARD VEIN). THE H.W. STEWARD VEIN THAT STRIKES N80E AND DIPS 30-40 SE IS OFFSET LEFT LATERALLY ALL EARLIERS SYSTEMS. THERE ARE THE BLUE AGE VEINS STRIKING N40-60W AND IPPING 35-90 SW ALSO.
Comment (Workings): IN 1973 9 LEVELS WERE ACTIVE: THE 3400, 3800, 3900, 4000, 4100, 4200, 4400, 4500, AND 4600.
Comment (Geology): POST-MINERAL. RARUS FAULT CUTS NE THROUGH MINE, DIPPING NW, OFFSETTING MAIN STAGE VEIN MINERALIZATION
References
Reference (Deposit): MBMG BULL 109, P. 20
Reference (Production): USGS PP 74.
Reference (Deposit): MILLER, R. N., ED., 1973, GUIDEBOOK FOR THE BUTTE FIELD MEETING, PRESENTED BY THE SOCIETY OF ECONOMIC GEOLOGISTS.
Reference (Deposit): USGS PP 74, P. 147-51.
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.
