Mine detail: Vermiculite Mine

Previously called ''

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Location

Lat / long:

38.26807, -105.54641

Resource(B)

Primary:	Vermiculite
Secondary:	Niobium (Columbium)
Tertiary:	Thorium, REE
Ore:	Columbite, Monazite, Perovskite, Pyrochlore, Thorianite, Vermiculite

Production

Operation type:	Surface
Production size:	Small
Development status:	Past Producer
Last production ended:	1945

Geology

Host type:	Gabbro,Pyroxenite
Associated rock:	Pyroxenite, Gabbro Of The Gem Park Complex;Carbonatites Of The Gem Park Complex
Associated type:	Gabbro,Pyroxenite,Lamprophyre
Structure:	Central Cordillera (Southern Rocky Mountains), Gem Park Complex
Tectonic:	Wet Mountains
Alteration processes:	Fenitization

References

MRDS	D009705
DEP	10013422
Reference	{Deposit:: PARKER, R. L. AND SHARP, W. N., 1970, MAFIC-ULTRAMAFIC IGNEOUS ROCKS AND ASSOCIATED CARBONATITES OF THE GEM PARK COMPLEX, CUSTER AND FREMONT COUNTIES, COLORADO: USGS PROFESSIONAL PAPER 649, 24 P.}{Deposit:: TAYLOR, R. B., SCOTT, G. R., WOBUS, R. A. AND 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.