G.W. and Antrim Claims

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

Name: G.W. and Antrim Claims  

State:  Colorado

County:  Custer

Elevation: 8,999 Feet (2,743 Meters)

Commodity: Thorium

Lat, Long: 38.15194, -105.32222

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.


Satelite image of the G.W. and Antrim Claims

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

Placer mines at Cripple Creek, Colorado ca. 1892

Check out this collection of Colorado's best historic mining photos: Incredible Photos of Colorado Mining Scenes.