The Bonanza Mine is a lead, silver, and gold mine located in Powell 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
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.
Bonanza Mine MRDS details
Site Name
Primary: Bonanza Mine
Commodity
Primary: Lead
Primary: Silver
Primary: Gold
Secondary: Copper
Secondary: Zinc
Tertiary: Antimony
Tertiary: Arsenic
Location
State: Montana
County: Powell
District: Emery (Zosell) District
Land Status
Land ownership: National Forest
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.
Holdings
Not available
Workings
Type: Underground
Ownership
Owner Name: Zosil
Home Office: Deer Lodge. Mt.
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year Last Production: 1960
Discovery Year: 1895
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
Alteration Type: L
Alteration Text: Includes Silicification And Pyritization And Minor Argillization And Sericitization. Porphyritic Basalt Has Been Kaolinized And Bleached.
Rocks
Name: Basalt
Role: Associated
Age Type: Host Rock
Age Young: Late Cretaceous
Name: Basalt
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Cretaceous
Name: Basalt
Role: Associated
Age Type: Associated Rock
Age Young: Late Cretaceous
Analytical Data
Not available
Materials
Ore: Sphalerite
Ore: Chalcopyrite
Ore: Tetrahedrite
Ore: Galena
Ore: Gold
Gangue: Pyrite
Gangue: Ankerite
Gangue: Quartz
Comments
Comment (Workings): 2 COMPARTMENT SHAFT, DRIFTS, 400 FT DRAINAGE TUNNEL THAT DID NOT REACH MAIN UNDER GROUND WORKINGS FROM LITTLE COTTONWOOD GULCH. AT LEAST 8 LEVELS. LARGEST SHOOT KNOWN AS THE RED STOPE OCCURS BETWEEN FIFTH AND THIRD LEVELS.
Comment (Development): 5 PATENTED CLAIMS: BONANZA, HOPE, DAISY, BONANZA EXTENSION, EDSON
Comment (Geology): LOW ANGLE REVERSE FAULTS ; GEOL.DESC: QUARTZ, PYRITE, ARSENOPYRITE, ANKERITIC CARBONATE
Comment (Location): ON LOW RIDGE E OF UPPER COURSE OF ROCKER GULCH. ; INFO FROM LAND.ST :(1959)
Comment (Reserve-Resource): THE INTERSECTION OF THE EMMA DARLING AND THE BONANZA-HIDDEN HAND VEIN MIGHT BE INVESTIGATED.
Comment (Production): $200,000
Comment (Deposit): LOCALLY THE VEIN IS A SHEARED ZONE WITH STREAKS OF ORE. IN PLACES IT IS A FILLED BRECCIA. IT CONSISTS OF A SERIES OF RUDELY PARALLEL FRACTURE FILLINGS AND REPLACEMENTS. IT CONTAINS STOCKWORKS, HORSES OF ALTERED WALL ROCK AND IRREGULAR MASSES OF SULFIDE MINERALS ON THE FOOTWALL AND HANGING WALL.
References
Reference (Deposit): USGS BULL 842, P. 279-80.
Reference (Deposit): MBMG BULL 34, P. 18, 19.
Reference (Deposit): MBMG BULL 25, P. 41.
Reference (Deposit): MBMG BULL 98, P. 19, 57.
Reference (Production): MBMG BULL 98, P 57.
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.
