Mine detail: Jim 3 Mine

Previously called ''

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Location

Lat / long:

38.37001, -105.53697

Resource(B)

Primary:	Feldspar, Mica
Secondary:	Niobium (Columbium), Tantalum, Beryllium, REE
Ore:	Beryl, Microcline, Muscovite
Gangue:	Tourmaline

Production

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

Geology

Host rock:	Migmatitic Gneiss
Host type:	Gneiss
Structure:	Northern Wet Mountains, Nw-Trending Faults
Tectonic:	Central Cordillera (Southern Rocky Mountains)

References

MRDS	D004902
DEP	10010870
Reference	{Deposit:: DAHLEM, DAVID H., 1965, GEOLOGY OF THE LOOKOUT MOUNTAIN AREA, FREMONT COUNTY, COLORADO: U. OF MICH UNPUB PHD THESIS}{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	Foord, Suzann C, Collins, Donna B.