The Beardsley Deposit is a thorium and ree mine located in Custer county, Colorado at an elevation of 8,999 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: 8,999 Feet (2,743 Meters)
Commodity: Thorium, REE
Lat, Long: 38.12028, -105.32111
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.
Beardsley Deposit MRDS details
Site Name
Primary: Beardsley Deposit
Secondary: Zabel-Beardsley Lease
Commodity
Primary: Thorium
Primary: REE
Secondary: Barium-Barite
Location
State: Colorado
County: Custer
District: Wet Mountains Area
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: Underground
Ownership
Owner Name: Calico Minerals
Years: 1960 -
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Surface
Discovery Year: 1952
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Southern Rocky Mountains
Mineral Deposit Model
Model Name: Thorium-rare-earth veins
Orebody
Not available
Structure
Type: R
Description: Wet Mountains
Type: L
Description: Nw-Trending Shear Zones
Alterations
Not available
Rocks
Name: Syenite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic
Name: Syenite
Role: Associated
Age Type: Associated Rock
Age Young: Late Cambrian
Name: Syenite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Cambrian
Name: Syenite
Role: Associated
Age Type: Host Rock Unit
Age Young: Neoproterozoic
Analytical Data
Not available
Materials
Ore: Thorite
Ore: Barite
Gangue: Quartz
Gangue: Microcline
Gangue: Fluorite
Gangue: Limonite
Gangue: Pyrite
Gangue: Galena
Gangue: Rutile
Comments
Comment (Geology): DEPOSITS SPACIALLY AND GENETICALLY RELATED TO CAMBRIAN ALKALIC COMPLEXES
Comment (Deposit): Discovery Year: EARLY 1950'S
Comment (Location): INFO FROM LAND.ST :1976
Comment (Production): 440 TONS OF THE ORE WERE REPORTED TO HAVE BEEN MINED IN 1958
Comment (Workings): WORKINGS CAVED AND/OR FILLED WITH WATER
References
Reference (Deposit): ARMBRUSTMACHER, T.J., 1976, THORIUM DEPOSITS IN THE WET MOUNTAINS AREA, FREMONT AND CUSTER COUNTIES, COLORADO: USGS OPEN-FILE REPORT 76-284, P. 4, 10-14
Reference (Deposit): SCOTT, G.R., TAYLOR, R.B., EPIS, R.C. AND WOBUS, R.A., 1978, GEOLOGIC MAP OF THE PUEBLO 1 DEGREE X 2 DEGREES QUADRANGLE, SOUTH-CENTRAL COLORADO: USGS MAP I-1022, 1:250,000
Reference (Deposit): STALTZ, M.H. AND OTHERS, 1979, PRINCIPAL, THORIUM RESOURCES IN THE UNITED STATES: USGS CIRCULAR 805, P. 12-13.
Reference (Deposit): DEL RIO, S.M., 1960, MINERAL RESOURCES OF COLORADO, FIRST SEQUEL: COLORADO MINERAL RESOURCES BOARD, P. 395
Colorado Mining Photos
Check out this collection of Colorado's best historic mining photos: Incredible Photos of Colorado Mining Scenes.
