Mine detail: Big Bear No. 2 Mine

Previously called 'Big BearLittle Bear'

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Location

Lat / long:

39.37583, -105.21169

Resource(B)

Primary:	Feldspar, REE
Ore:	Microcline
Gangue:	Allanite, Amethyst, Doverite, Fluorite, Gadolinite, Monazite, Xenotime
Orebody form:	ELLIPSOIDAL

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer

Geology

Host rock:	Pegmatite;Pikes Peak Granite
Host type:	Pegmatite
Associated rock:	Pegmatite;Pikes Peak Granite
Associated type:	Pegmatite,Granite
Structure:	Front Range Uplift, Pikes Peak Batholith, Kennedy Gulch Fault Zone
Tectonic:	Central Cordillera (Southern Rocky Mtns)
Alteration processes:	Rae Replacement Of Fluorite

References

MRDS	D010179
DEP	10087823
Reference	{Deposit:: SIMMONS, W.B., AND HEINRICH, E.W., 1980, RARE-EARTH PEGMATITES OF THE SOUTH PLATTE DISTRICT, COLORADO: CGS RESOURCE SER. 11, 131 P.}{Deposit:: PETERSON, W.L., 1964, GEOLOGY OF THE PLATTE CANYON QUADRANGLE, COLORADO: USGS BULL. 1181-C, 23 P., 1 PL.}
Reporter	Schwochow, Stephen D.