The Last Chance-Shady Tree Mine is a thorium mine located in Beaverhead county, Montana at an elevation of 7,451 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: 7,451 Feet (2,271 Meters)
Commodity: Thorium
Lat, Long: 44.93694, -113.46194
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.
Last Chance-Shady Tree Mine MRDS details
Site Name
Primary: Last Chance-Shady Tree Mine
Secondary: Staatz Loc. No. 82
Commodity
Primary: Thorium
Secondary: Uranium
Location
State: Montana
County: Beaverhead
District: Lemhi Pass District
Land Status
Not available
Holdings
Not available
Workings
Type: Underground
Ownership
Owner Name: Sawyer - Adecor Inter.
Home Office: 3780 Wilshire Blvd., Los Angeles, Calif. 90010
Production
Not available
Deposit
Record Type: Site
Operation Category: Occurrence
Deposit Type: Vein
Operation Type: Unknown
Discovery Year: 1947
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: L
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Type: R
Description: Folding And Faulting Locally
Type: L
Description: In The District, Veins Are E-W Trending Tension Fractures And Nw Trending Shear Fractures
Alterations
Alteration Type: L
Alteration Text: Silica And Sericite
Rocks
Name: Quartzite
Role: Host
Age Type: Associated Rock
Age Young: Neoproterozoic
Name: Quartzite
Role: Host
Age Type: Host Rock Unit
Age Young: Neoproterozoic
Analytical Data
Analytical Data: TH AVERAGES .6
Materials
Ore: Thorite
Gangue: Barite
Gangue: Specularite
Gangue: Goethite
Gangue: Chalcedony
Gangue: Microcline
Comments
Comment (Reserve-Resource): CUTOFF GRADE OF 0.25 % THORIA OVER A LENGTH OF 2000 FT AND A PROJECTED DEPTH OF 250 FT.
Comment (Location): OVER THE DIVIDE BETWEEN NORTH AND SOUTH FRYING PAN CREEK
Comment (Workings): TWO ADITS, 80 FT SHAFT AND NUMEROUS BULL DOZER CUTS AND TRENCHES
Comment (Deposit): Discovery Year: LATE 1940'S
References
Reference (Analytical Data): SRC.REF: GEACH R. D., 1972
Reference (Deposit): GEACH, 1972, MINES & MINERAL DEPOSITS - BEAVERHEAD CO., MT. BUREAU MINES & GEOLOGY BULL. 85.
Reference (Deposit): LAWSON, 1974, DIRECTORY OF MINING ENTERPRISES FOR 1974, MT. BUREAU MINES & GEOLOGY BULL. 95.
Reference (Deposit): 1953 GEOLMAP TRITES A. F., TOOKER E. W., BULL. 988-H
Reference (Deposit): 1962 GEOLMAP SHARP W. M., CAVENDER W. S., BULL 1126
Reference (Deposit): 1972 GEOLMAP STAATZ M. H., BULL 1351
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.
