The Midnight Mine is a silver, lead, and gold mine located in Beaverhead county, Montana at an elevation of 7,041 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: 7,041 Feet (2,146 Meters)
Commodity: Silver, Lead, Gold
Lat, Long: 45.30694, -112.88556
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: Midnite Mine
Commodity
Primary: Silver
Primary: Lead
Primary: Gold
Location
State: Montana
County: Beaverhead
District: Argenta 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
Type: Surface/Underground
Ownership
Owner Name: P. S. Antonioli
Home Office: Butte, Mt.
Years: 1976 -
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Deposit Type: Vein
Operation Type: Unknown
Discovery Year: 1875
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Physiographic Detail: Pioneer Mountains
Mineral Deposit Model
Not available
Orebody
Form: PINCH AND SWELL
Structure
Not available
Alterations
Not available
Rocks
Name: Quartzite
Role: Host
Age Type: Host Rock
Age Young: Neoproterozoic
Name: Quartzite
Role: Host
Age Type: Host Rock Unit
Age Young: Neoproterozoic
Analytical Data
Not available
Materials
Ore: Gold
Ore: Galena
Gangue: Quartz
Gangue: Pyrite
Comments
Comment (Deposit): Discovery Year: 1870'S
Comment (Production): PRODUCTION FIGURES ARE COMBINED FOR THE MIDNIGHT AND GLADSTONE MINES.
Comment (Development): TWO PATENTED CLAIMS: MIDNIGHT AND MIDNIGHT EXTENSION
Comment (Workings): FIVE SHAFTS; 265, 180, 150, 80, AND 60 FEET DEEP. ORE HAS BEEN STOPED TO THE SURFACE IN PLACES. OPEN PIT ON DUMP WAS REPORTED PRODUCING IN 1964.
Comment (Deposit): VEIN VARIES IN WIDTH AND SPLITS IN SOME PLACES. CHIEF VALUE IN OXIDIZED ZONE (TO 200 FEET DEPTH) IS GOLD. IN SULFIDE ZONE VALUE IS IN LEAD AND SILVER.
References
Reference (Deposit): USGS BULL 574, P. 67.
Reference (Deposit): MBMG BULL 6, P. 73.
Reference (Deposit): MBMG BULL 46, P. 5.
Reference (Deposit): MBMG BULL 103, P. 3.
Reference (Deposit): 1914 COMPILE WINCHELL, A.N., U.S. GEOL. SUR. BULL. 574
Reference (Deposit): 1931 GEOLMAP M.B.M.G. BULL. 6
Reference (Production): M.B.M.G. BULL. 85
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.
