Mine detail: Colorado Feldspar Pegmatite

Previously called ''

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Location

Lat / long:

38.4264, -105.66586

Resource(B)

Primary:	Feldspar
Secondary:	REE
Ore:	Euxenite, Fluorite, Microcline, Monazite
Gangue:	Biotite, Calcite, Hematite, Magnetite, Plagioclase, Quartz, Sericite

Production

Operation type:	Surface
Production size:	Small
Development status:	Past Producer
First production started:	1939

Geology

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

References

MRDS	D009893
DEP	10101828
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. 71-72}{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}
Reporter	Collins, Donna B.