The Index Mine is a gold and silver mine located in Madison county, Montana at an elevation of 6,079 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: 6,079 Feet (1,853 Meters)
Commodity: Gold, Silver
Lat, Long: 45.61306, -112.51583
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.
Index Mine MRDS details
Site Name
Primary: Index Mine
Commodity
Primary: Gold
Primary: Silver
Location
State: Montana
County: Madison
District: Rochester District
Land Status
Land ownership: Private
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
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Deposit Type: Vein
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Physiographic Detail: Highland Mountains
Mineral Deposit Model
Not available
Orebody
Form: IRREGULAR LENSES
Structure
Type: L
Description: Rochester Fault Trends N50w.
Alterations
Alteration Type: L
Alteration Text: Oxidation
Rocks
Name: Schist
Role: Host
Age Type: Host Rock
Age Young: Neoarchean
Name: Schist
Role: Host
Age Type: Host Rock Unit
Age Young: Neoarchean
Analytical Data
Not available
Materials
Gangue: Quartz
Gangue: Limonite
Comments
Comment (Location): SE 1/4, SW 1/4, SECTION 31
Comment (Deposit): THE INDEX VEIN IS PERSISTANT BUT NARROW AND IRREGULAR IN WIDTH.
Comment (Workings): INCLINED SHAFT. CONSIDERABLE STOPING OF OXIDIZED ORE TO NEAR SURFACE
References
Reference (Deposit): MBMG MEM 19, P. 45.
Reference (Deposit): CONSV. DIV. COMP. DATE, 05-22-1963
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.
