Mine detail: Sewell Ranch

Location:	Custer County, Colorado, United States, North America
Lat / long:	38.16807, -105.21529
dep_id:	10012580
mrds_id:	D008266
Commodity type:	metallic
Major mineral:	Thorium, REE
Operation type:	Underground
Production size:	No production occurred
Development status:	Prospect
ore:	Thorite
gangue:	Barite, Calcite, Galena, Limonite, Quartz
orebody_fm:	TABULAR
work_type:	Surface/Underground
model:	30: Thorium-rare-earth veins
alteration:	Some Alteration
conc_proc:	Strongly Associated With Barite
ore_ctrl:	Mineralized Vein, Strongly Sheared;
Reporter:	Collins, Donna B.
hrock_unit:	Alaskitic Granite Gneiss And Hornblende Gneiss
hrock_type:	Gneiss
arock_type:	Syenite
Structure:	Wet Mountains
tectonic:	Central Cordillera (Southern Rocky Mountains)
disc_yr:	1952
References:	Deposit:: NELSON-MOORE, J.L., COLLINS, D.B., AND HORNBAKER, A.L. 1978, RADIOACTIVE MINERAL OCCURRRNCES OF COLORADO AND BIBLIOGRAPHY: COLORADO GEOLOGICAL SURVEY BULLETIN 40, P. 123 Deposit:: CHRISTMAN, R.A., HEYMAN, A.M., DELLWIG, L.F., GOTT, G.B., 1953, THORIUM INVESTIGATIONS 1950-52, WET MOUNTAINS, COLORADO: USGS CIRCULAR 290, P. 26. Deposit:: SCOTT, G.R., TAYLOR, R.B., EPIS, R.C., AND WOBUS, R.A., 1978, GEOLOGIC MAP OF THE PUEBLO 10X20 QUADRANGLE, SOUTH-CENTRAL COLORADO: USGS MAP I-1022