Colorado · Custer County
Past Producer

G.W. and Antrim Claims

Custer County, Colorado, United States
ThoriumLeadNiobium (Columbium)GoldSilverUranium
⌖ Show on mapUSGS source ↗
Commodities
PrimaryThorium
SecondaryLead
TertiaryNiobium (Columbium), Gold, Silver, Uranium
Commodity typeM
Deposit
Model30: Thorium-rare-earth veins82: Epithermal veins
Deposit sizeN
WorkingsSurface/Underground
Orebody formfissure vein
Ore controlMineralized Veins; Shear Zone; Fault Junction
Materials
Ore mineralsThorite
GangueBarite, Calcite, Chalcopyrite, Galena, Hematite
Geology
Host rockGneiss · Alaskitic Granite Gneiss
Associated rockRhyolite · Intrusive Rhyolite Porphyry
StructureWet Mountains, 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
Tectonic settingCentral Cordillera (Southern Rocky Mountains)
AlterationAlteration At Contact Between Stock And Gneiss
Economic & production
Development statusPast Producer
Discovery year1954
Identification
Deposit ID10094480
MRDS IDD008251
Alternate namesAntrim Claims, G.W. Lode Claims
RegionNA
Data scoreB
Coordinates38.15195, -105.32279
References
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. 121CHRISTMAN, 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. 528BROCK, M.R. AND SINGEWALD, Q.D., 1968, GEOLOGIC MAP OF THE MOUNT TYNDALL QUADRANGLE, CUSTER COUNTY, COLORADO: USGS MAP GQ-596, 1: 24, 000