Mine detail: Darby Extension

Previously called 'Derby Extension'

<< Back to the map

Location

Lat / long:

38.24112, -105.36724

Resource(B)

Primary:	Thorium, REE
Tertiary:	Barium-Barite, Copper, Lead
Ore:	Barite, Chalcopyrite, Galena, Thorite
Gangue:	Calcite, Limonite, Pyrite, Quartz, Siderite

Production

Operation type:	Unknown
Production size:	None
Development status:	Past Producer

Geology

Host rock:	Hornblende Gneiss
Host type:	Gneiss,Granite
Structure:	Wet Mountains, Large, Northwest-Trending Dead Mule Gulch Fault; Smaller, Northeast-Trending Fault
Tectonic:	Central Cordillera (Southern Rocky Mtns)

References

MRDS	D008250
DEP	10012567
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.120}{Deposit:: BROCK, M.R. AND SINGEWALD, Q.D., 1968, GEOLOGIC MAP OF THE MOUNT TYNDALL QUADRANGE, CUSTER COUNTY, COLORADO: USGS MAP GQ-596.}{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. 24-25.}{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.522-524.}
Reporter	Collins, Donna B.