The No. 4 Thorium Prospect is a thorium mine located in Lemhi county, Idaho at an elevation of 6,362 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: 6,362 Feet (1,939 Meters)
Commodity: Thorium
Lat, Long: 44.9847, -113.48190
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.
No. 4 Thorium Prospect MRDS details
Site Name
Primary: No. 4 Thorium Prospect
Commodity
Primary: Thorium
Tertiary: REE
Tertiary: Lead
Location
State: Idaho
County: Lemhi
District: Lemhi Pass Area
Land Status
Land ownership: BLM Administrative Area
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: Occurrence
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: Beaverhead Mountains
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Type: R
Structure: Lemhi Pass Fault
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
Analytical Data: 1 CHANNEL SAMPLE FOUND 0.42% THO2
Materials
Ore: Monazite
Ore: Galena
Ore: Thorite
Gangue: Specularite
Gangue: Hematite
Gangue: Magnetite
Gangue: Goethite
Gangue: Quartz
Comments
Comment (Geology): Original Structures entry: Regional - Lemhi Pass Fault
Comment (Geology): Original ore control entry: Lemhi Pass
References
Reference (Deposit): V.E. Mitchell, Et. Al; Mines And Prospects Map Series, 1981, Dubois Quad, Location No. 39
Reference (Deposit): Staatz, M. H., 1972, Geology And Description Of The Thorium-Bearing Veins, Lemhi Pass Quadrangle, Idaho And Montana: USGS Bull 1351, 94 P
Idaho Gold
"Where to Find Gold in Idaho" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in Idaho. Read more: Where to Find Gold in Idaho.
