The Helena-Jefferson Mine is a silver, zinc, and lead mine located in Jefferson county, Montana at an elevation of 4,902 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: 4,902 Feet (1,494 Meters)
Commodity: Silver, Zinc, Lead
Lat, Long: 46.35694, -112.04583
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.
Helena-Jefferson Mine MRDS details
Site Name
Primary: Helena-Jefferson Mine
Commodity
Primary: Silver
Primary: Zinc
Primary: Lead
Secondary: Copper
Tertiary: Molybdenum
Location
State: Montana
County: Jefferson
District: Alahambra (Golconda) District
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Owner Name: Helena-Jefferson Mine Co.
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1928
Year Last Production: 1928
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
Alterations
Not available
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
Analytical Data
Not available
Materials
Ore: Galena
Ore: Alabandite
Ore: Rhodonite
Ore: Molybdenite
Ore: Chalcopyrite
Ore: Sphalerite
Gangue: Calcite
Gangue: Quartz
Gangue: Pyrite
Gangue: Rhodochrosite
Comments
Comment (Location): W SLOPE OF BEAVERTON CR.
Comment (Deposit): 6 VEINS ON PROPERTY BUT ONLY ONE (1928) WAS WORKED, THE HELENA VEIN. BETWEEN A HANGING WALL OF APLITE AND A FOOTWAL OF QUARTZ MONZONITE.
Comment (Workings): SEVERAL INCLINED SHAFTS, ONE 550 FT DEEP, AND A CROSSCUT TUNNEL.
References
Reference (Deposit): MBMG BULL-16, P. 51, 109.
Reference (Deposit): USGS BULL 842, P. 238-40.
Reference (Production): MBMG BULL 16, P. 109.
Reference (Deposit): USGS PP 428, PL. 1
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.
