The Midnight Mine is a silver mine located in Granite county, Montana at an elevation of 5,801 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: 5,801 Feet (1,768 Meters)
Commodity: Silver
Lat, Long: 46.33556, -113.27028
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.
Midnight Mine MRDS details
Site Name
Primary: Midnight Mine
Secondary: Imperial
Commodity
Primary: Silver
Secondary: Copper
Secondary: Manganese
Tertiary: Barium-Barite
Location
State: Montana
County: Granite
District: Philipsburg (Granite-Flint Creek) District
Land Status
Not available
Holdings
Not available
Workings
Type: Underground
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Deposit Type: Replacement Vein
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
Not available
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 Unit
Age Young: Late Cretaceous
Name: Diorite
Role: Associated
Age Type: Host Rock Unit
Age Young: Late Cambrian
Name: Diorite
Role: Associated
Age Type: Host Rock
Age Young: Late Cambrian
Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Late Cretaceous
Analytical Data
Not available
Materials
Ore: Copper
Gangue: Calcite
Gangue: Barite
Gangue: Quartz
Comments
Comment (Location): ON CAMP CREEK BELOW TOWER.
Comment (Production): SEVERAL $1000
Comment (Workings): SHAFT, CROSSCUT 50 FT BELOW SURFACE. DRIFTS, LOWER WORKINGS INACESSIBLE IN 1906.
Comment (Deposit): SILVER SULFIDES IN GREY QUARTZ.
References
Reference (Deposit): USGS PP 78, P. 211.
Reference (Deposit): USGS BULL 1237.
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.
