Mine detail: Guffey District, West

Previously called ''

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Location

Lat / long:

38.75, -105.56725

Resource(M)

Primary:	Tungsten, REE
Ore:	Allanite, Euxenite, Ilmenite, Monazite
Gangue:	Apatite, Bornite, Calcite, Chalcopyrite, Chlorite, Clinozoisite, Copper, Diopside, Epidote, Magnetite, Quartz, Sphalerite, Sphene, Thulite, Zoisite

Production

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

Geology

Host rock:	Idaho Springs Formation;Idaho Springs Formation
Host type:	Gneiss
Associated rock:	Boulder Creek;Boulder Creek;
Associated type:	Diorite
Structure:	Front Range, Thirtynine Mile Volcanic Field, Antelope Mountain And Guffey Volcanic Centers, Currant Creek Fault And Related Nw-Trending Faults
Tectonic:	Central Cordillera, Southern Rocky Mountains

References

MRDS	D001082
DEP	10008730
Reference	{Deposit:: LEMMON, D.M., AND TWETO, O.L., 1962, TUNGSTEN IN THE U.S., USGS MAP, MR-25.}{Deposit:: BELSER, CARL, 1956, TUNGSTEN POTENTIAL IN CHAFFEE, FREMONT, GUNNISON, LAKE, LARIMER, PARK AND SUMMIT COUNTIES, COLORADO: USBM INFORMATION CIRCULAR 7748, P. 7-10.}{Deposit:: EPIS, R.C., WOBUS, R.A., AND SCOTT, G.R., 1979, GEOLOGIC MAP OF THE BLACK MOUNTAIN QUADRANGLE, FREMONT AND PARK COUNTIES, COLORADO: USGS MAP I-1195, 1:62,500.}{Deposit:: EPIS, R.C., WOBUS, R.A., AND SCOTT, G.R., 1979, GEOLOGIC MAP OF THE GUFFEY QUADRANGLE, PARK COUNTY, COLORADO: USGS MAP I-1180, 1:62,500.00}{Deposit:: HEINRICH, E.W., 1981, PRECAMBRIAN TUNGSTEN AND COPPER-ZINC SKARN DEPOSITS OF SOUTH-CENTRAL COLORADO: CGS RESOURCE SERIES 21, 115 P.}
Reporter	Elliott, James E., Collins, Donna B., Mosier, Dan