The G.W. and Antrim Claims is a thorium 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
Lat, Long: 38.15194, -105.32222
Map: View on Google Maps
Satelite View
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G.W. and Antrim Claims MRDS details
Site Name
Primary: G.W. and Antrim Claims
Secondary: Antrim Claims
Secondary: G.W. Lode Claims
Commodity
Primary: Thorium
Secondary: Lead
Tertiary: Niobium (Columbium)
Tertiary: Uranium
Tertiary: Gold
Tertiary: Silver
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: Surface/Underground
Ownership
Owner Name: George Schweigert
Home Office: 780 Magnolia St, Denver, Co.
Years: 1954 -
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Underground
Discovery Year: 1954
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
Model Name: Epithermal veins
Orebody
Form: fissure vein
Structure
Type: R
Description: Wet Mountains
Type: L
Description: Stock On East-West Valley Which Is Possibly A Shear Zone; A Dike Crosses The Valley, Trending Nw; The Stock Is Probably At The Junction Of Two Faults; The Stock Is 1100 Ft X 400 Ft, Elongated To The Northeast; The Rhyolite Porphyry Dike Lies At The Southeast End Of The Stock, Striking Se, With A Length Of 1600 Ft And Width Of 7 Ft
Alterations
Alteration Type: L
Alteration Text: Alteration At Contact Between Stock And Gneiss
Rocks
Name: Rhyolite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Early Miocene
Name: Rhyolite
Role: Associated
Age Type: Host Rock Unit
Age Young: Neoproterozoic
Name: Rhyolite
Role: Associated
Age Type: Associated Rock
Age Young: Early Miocene
Name: Rhyolite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic
Analytical Data
Analytical Data: TO 4.79% EQUIV. TH02
Analytical Data: .023 TO .112% EQUIV. U308, .005 TO .012% U308, .11 TO .49% TH02
Materials
Ore: Thorite
Gangue: Barite
Gangue: Calcite
Gangue: Chalcopyrite
Gangue: Hematite
Gangue: Galena
Trace: Columbite
Comments
Comment (Location): NORTH OF TYNDALL GULCH ; INFO FROM LAND.ST :(1976)
Comment (Development): CLAIMS PATENTED BY GRAND RAPIDS GOLD MINING CO. IN 1903
Comment (Workings): TRENCHING, CROSSCUTTING, SHAFT
References
Reference (Deposit): NELSON-MOORE, J.L., COLLINS, D.B. AND HORNBAKER, A.L., 1978, RADIOACTIVE MINERAL OCCURRENCES OF COLORADO AND BIBLIOGRAPHY: COLORADO GEOLOGICAL SURVEY BULLETIN 40, P. 121
Reference (Deposit): CHRISTMAN, R.A., BROCK, M.R., PEARSON, R.C.AND SINGEWALD, Q.D., 1959, GEOLOGY AND THORIUM DEPOSITS OF THE WET MOUNTAINS, COLORADO; A PROGRESS REPORT: USGS BULLETIN 1072-H, P. 528
Reference (Deposit): BROCK, M.R. AND SINGEWALD, Q.D., 1968, GEOLOGIC MAP OF THE MOUNT TYNDALL QUADRANGLE, CUSTER COUNTY, COLORADO: USGS MAP GQ-596, 1: 24, 000
Colorado Mining Photos
Check out this collection of Colorado's best historic mining photos: Incredible Photos of Colorado Mining Scenes.
