Mine detail: John Spalding

Location:	Custer County, Colorado, United States, North America
Lat / long:	38.2289, -105.26863
dep_id:	10012568
mrds_id:	D008252
Commodity type:	metallic and nonmetallic
Major mineral:	Barium-Barite, Thorium
Minor mineral:	Lead
Operation type:	Surface-Underground
Production size:	No production occurred
Development status:	Prospect
ore:	Thorite
gangue:	Barite, Chlorite, Galena, Hematite, Quartz, Serpentine
orebody_fm:	TABULAR
work_type:	Surface/Underground
model:	30: Thorium-rare-earth veins
ore_ctrl:	Shear Zone; Mineralized Veins
Reporter:	Collins, Donna B.
hrock_unit:	Alaskitic Granite Gneiss
hrock_type:	Gneiss
arock_unit:	Microcline Granite
arock_type:	Granite
Structure:	Wet Mountains, Shear Zone
tectonic:	Central Cordillera (Southern Rocky Mountains)
disc_yr:	1951
References:	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. 121-122. Deposit:: CHRISTMAN, R.A., HEYMAN, A.M., DELLWIG, L.F. AND GOTT, G.B., 1953, THORIUM INVESTIGATIONS 1950-52, WET MOUNTAINS, COLORADO: USGS CIRCULAR 290, P. 27. 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