The Mammoth Mine is a gold and silver mine located in Missoula county, Montana at an elevation of 5,971 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: 5,971 Feet (1,820 Meters)
Commodity: Gold, Silver
Lat, Long: 46.8425, -113.38250
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.
Mammoth Mine MRDS details
Site Name
Primary: Mammoth Mine
Commodity
Primary: Gold
Primary: Silver
Secondary: Copper
Tertiary: Antimony
Location
State: Montana
County: Missoula
District: Coloma District
Land Status
Not available
Holdings
Not available
Workings
Type: Underground
Ownership
Owner Name: Mammoth Mining Co.,
Home Office: Spokane Wash.
Production
Year: 1950
Time Period: 1896 - 1950
Material type: AG
Description: Cp_Grade: ^About 2 Toz/St
Year: 1950
Time Period: 1896 - 1950
Material type: AU
Description: Cp_Grade: ^About 1 Toz/St
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Discovery Year: 1897
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
Physiographic Detail: Garnet Range
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Type: R
Description: Bearmouth Overthrust
Type: L
Description: Garnet Stock
Alterations
Alteration Type: L
Alteration Text: Oxidation
Rocks
Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Late Cretaceous
Name: Diorite
Role: Associated
Age Type: Host Rock
Age Young: Late Cretaceous
Name: Diorite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Cretaceous
Name: Diorite
Role: Associated
Age Type: Host Rock Unit
Age Young: Late Cambrian
Analytical Data
Analytical Data: $20-30/TON AU
Materials
Ore: Chalcopyrite
Ore: Gold
Ore: Tetrahedrite
Comments
Comment (Workings): MINE ORIGINALLY DEVELOPED BY 270 FT SHAFT WITH SEVERAL LEVELS AND STOPES. ABOUT 1916 A DRAIN TUNNEL WAS PUT IN 600 FT BELOW THE MAMMOTH SHAFT.
Comment (Geology): 700 FT LEVEL MAY BE THE LIMITS FOR HIGH AU ORE BUT THE COPPER MINERAL MAY PERSIST TO LOWER DEPTHS IT MAY EVEN INCREASE DOWNWARDS.
Comment (Location): U.T.M. COORDINATES TAKEN ON SHAFT
Comment (Production): 1896-1918 $200000 AU. PRODUCTION YEARS 1896-99, 1918-21, 1932-50.
Comment (Development): 1896-1899 MILL WAS BUILT IN WASHOE GULCH.
Comment (Deposit): THE VEIN IS JUST E OF A GRANODIORITE-LIMESTONE CONTACT BUT DOES NOT CROSS IT. ANOTHER VEIN FOLLOWING THE CONTACT STRIKES SE AND DIPS EAST. HIGH GRADE OXIDIZED ORE IS REPORTED IN UPPER LEVELS OF BOTH VEINS.
References
Reference (Deposit): USGS BULL 660, P. 196-98.
Reference (Deposit): MBMG BULL 8, P. 11, 13, 15, 16, 26, 27.
Reference (Deposit): MBMG MEM 39, P. 26-28.
Reference (Deposit): MBMG MEM 31, P. 77-8.
Reference (Production): USGS BULL 660, MBMG MEM 39, MBMG BULL 8.
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.
