The San Francisco Mine is a gold and silver mine located in Granite county, Montana at an elevation of 6,001 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: 6,001 Feet (1,829 Meters)
Commodity: Gold, Silver
Lat, Long: 46.34167, -113.26250
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.
San Francisco Mine MRDS details
Site Name
Primary: San Francisco Mine
Commodity
Primary: Gold
Primary: Silver
Secondary: Lead
Secondary: Zinc
Secondary: Copper
Tertiary: Manganese
Tertiary: Arsenic
Tertiary: Antimony
Location
State: Montana
County: Granite
District: Philipsburg (Granite-Flint Creek) 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: Mr. Donlan
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Discovery Method: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Physiographic Detail: Flint Creek Range
Mineral Deposit Model
Not available
Orebody
Form: TABULAR
Structure
Type: R
Description: Philipsburg Batholith
Type: L
Description: Philipsburg Anticline, Philipsburg Overthrust
Alterations
Not available
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
Analytical Data
Analytical Data: BETTER ORE: 45 OZ/TON AG, $3-$4/TON AU.
Materials
Ore: Sphalerite
Ore: Gold
Ore: Tetrahedrite
Ore: Galena
Ore: Proustite
Gangue: Pyrite
Gangue: Rhodochrosite
Gangue: Quartz
Gangue: Calcite
Comments
Comment (Deposit): DIP RANGE 80S TO VERTICAL. VEIN IS OFFSET ABOUT 25 FT TO THE SOUTH.
Comment (Workings): LEVELS AT 100 FT INTERVALS, 1906 LEVELS 4 AND BELOW ARE UNDER WATER.
Comment (Geology): SECONDARY BRECCIATION OF VEIN WITH RHODOCHROSITE AND CALCITE CEMENT.
Comment (Location): INFO FROM LAND.ST :(1971)
Comment (Production): $30,000 (1906), $8000 OF IT FROM DUMP.
References
Reference (Deposit): USGS PP 78, P. 208.
Reference (Deposit): USGS BULL 1237, PLATE 1.
Reference (Production): EMMONS AND CALKINS, 1913, USGS PP 78.
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.
