The Bald Butte Mine is a gold and silver mine located in Lewis and Clark county, Montana at an elevation of 6,880 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: 6,880 Feet (2,097 Meters)
Commodity: Gold, Silver
Lat, Long: 46.72278, -112.34639
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.
Bald Butte Mine MRDS details
Site Name
Primary: Bald Butte Mine
Commodity
Primary: Gold
Primary: Silver
Secondary: Lead
Secondary: Copper
Tertiary: Fluorine-Fluorite
Tertiary: Molybdenum
Location
State: Montana
County: Lewis and Clark
District: Marysville District
Land Status
Not available
Holdings
Not available
Workings
Type: Surface/Underground
Ownership
Owner Name: Bald Butte Gold Mines,
Home Office: Spokane, Wa
Production
Year: 1948
Time Period: 1890-1948
Mined: 152000.000 mt
Material type: ore
Deposit
Record Type: Site
Operation Category: Past Producer
Deposit Type: Polymetallic veins
Operation Type: Unknown
Years of Production:
Organization:
Significant: Y
Deposit Size: S
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Mineral Deposit Model
Model Name: Polymetallic veins
Orebody
Form: STRATA-BOUND
Structure
Type: R
Description: Boulder Batholith, Prickly Pear Dome
Type: L
Description: Marysville Stock, Post-Mineral Downthrown Fault Blocks
Alterations
Alteration Type: L
Alteration Text: Sericitization, Fluoritization
Rocks
Name: Diorite
Role: Associated
Description: PORPHYRITIC DIORITE, GRANODIORITE
Age Type: Host Rock
Age Young: Neoproterozoic
Name: Diorite
Role: Associated
Description: PORPHYRITIC DIORITE, GRANODIORITE
Age Type: Host Rock Unit
Age Young: Neoproterozoic
Name: Diorite
Role: Associated
Description: PORPHYRITIC DIORITE, GRANODIORITE
Age Type: Associated Rock
Age Young: Pliocene
Analytical Data
Analytical Data: SAMPLE: 30% CAF2, 41% SIL, 5% AL AND FE OXIDES
Materials
Ore: Fluorite
Ore: Sphalerite
Ore: Galena
Ore: Molybdenite
Gangue: Pyrite
Gangue: Sericite
Gangue: Quartz
Comments
Comment (Location): ON BALD BUTTE 3.5 MI SOUTHWEST OF THE OLD MINING CAMP OF MARYSVILLE.
Comment (Production): TOTAL PRODUCTION REPORTED VALUE $2750000, 90% WAS BULLION, AND 10% IN CONCENTRATES. BULLION 753 FINE, CONCENTRATES RAN 1 OZ AU, 4 OZ AG, AND 10% PB.
Comment (Deposit): ORE SHOOTS WERE FOUND ALONGSIDE THE DIKE IN PLACES AND IN THE ADJOINING HORNSTONE ON ITS N SIDE.
Comment (Workings): WORKINGS INCLUDED A SERIES OF PITS & TUNNELS. HOWEVER, AT THE TIME OF SAHINEN'S VISITATION THE UNDERGROUND WORKINGS WERE INACCESSIBLE.
Comment (Geology): THE "KNIFEBLADE" FOUND HERE. SO NAMED FOR NARROW FISSURE VEIN STRUCTURES RICH IN FREE GOLD.
Comment (Commodity): SAHINEN REPORTS THAT FLUORITE PRODUCTION WOULDN'T BE POSSIBLE WITHOUT EXTENSIVE BENEFICIATION
References
Reference (Deposit): MBMG BULL 28, P. 6, 22, 23.
Reference (Deposit): USGS BULL 955-E, P. 220.
Reference (Deposit): USGS BULL 527.
Reference (Deposit): USGS PP 57, P. 178
Reference (Production): KNOPF, 1913, U.S.G.S. BULL. 527
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.
