Mine detail: Pine Ridge Pegmatite

Previously called ''

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Location

Lat / long:

38.48751, -105.6728

Resource(B)

Primary:	Feldspar
Secondary:	REE
Ore:	Fluorite, Gadolinite, Microcline
Gangue:	Biotite, Plagioclase, Quartz, Sericite
Discovery year:	1941

Production

Operation type:	Unknown
Production size:	None
Development status:	Occurrence

Geology

Host rock:	Migmatitic Gneiss
Host type:	Diorite,Gneiss
Associated rock:	Granodiorite
Associated type:	Diorite
Structure:	Northern Wet Mountains, Thirtynine Mile Volcanic Field, Cotopaxi And Texas Creek Faults
Tectonic:	Central Cordillera (Southern Rocky Mountains)

References

MRDS	D009892
DEP	10013538
Reference	{Deposit:: HEINRICH, E. W., 1948, FLUORITE-RARE EARTH MINERAL PEGMATITES OF CHAFFEE AND FREMONT COUNTIES, COLORADO: AMERICAN MINERALOGIST, V. 33, NOS. 1-2, P. 72}{Deposit:: TAYLOR, R. B., SCOTT, G. R., WOBUS, R. A., EPIS, R. C., 1975, RECONNAISSANCE GEOLOGIC MAP OF THE COTOPAXI 15-MINUTE QUADRANGLE, FREMONT AND CUSTER COUNTIES, COLORADO: USGS MAP I-900, 1:62,500}{Deposit:: Hanley, J.B., Heinrich, E.W., and Page, L.R., 1950, Pegmatite investigations in Colorado, Wyoming, and Utah 1942-1944, U.S.G.S. Professional Paper 227, 125 p.}
Reporter	Collins, Donna B., Keller, John W.