Mine detail: Crystal No. 8 Mine

Previously called 'No. 8 Mine'

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Location

Lat / long:

38.82917, -106.02421

Resource(B)

Primary:	Feldspar
Secondary:	REE
Ore:	Allanite, Euxenite, Microcline
Gangue:	Biotite, Garnet, Plagioclase, Quartz
Orebody form:	LENTICULAR

Production

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

Geology

Host type:	Granite
Associated rock:	Granitic Rocks
Associated type:	Granite
Structure:	Mosquito Range, Arkansas Valley Graben, Nw-Trending Faults
Tectonic:	Central Cordillera (Southern Rocky Mountains)

References

MRDS	D010133
DEP	10013702
Reference	{Deposit:: HANLEY, J.B., HEINRICH, E.W., PAGE, L.R., 1950, PEGMATITE INVESTIGATIONS IN COLORADO, WYOMING, AND UTAH, 1942-1944: USGS PROFESSIONAL PAPER 227, P. 21-22}{Deposit:: ARGALL, G.O., JR., 1949, INDUSTRIAL MINERALS OF COLORADO: COLORADO SCHOOL OF MINES QUARTERLY, V. 44, NO. 2, P. 161.}{Deposit:: TWETO, O.L. STEVEN, T.A., HAIL, W.J., JR., MOENCH, R.H., 1976, PRELIMINARY GEOLOGIC MAP OF THE MONTROSE 1 X 2 QUADRANGLE, SOUTHWESTERN COLORADO: USGS MAP MF-761, 1:250,000}{Reserve-Resource:: HANLEY, J.B., 1950}
Reporter	Collins, Donna B.