Mine detail: Butterfield Mine

Previously called ''

<< Back to the map

Location

Lat / long:

39.41777, -105.31225

Resource(M)

Primary:	REE, Niobium (Columbium), Tantalum
Ore:	Fergusonite
Gangue:	Quartz
Orebody form:	IRREGULAR, OVAL

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)

References

MRDS	D010177
DEP	10013725
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:: HAYNES, C.V., JR., 1965, GENESIS OF THE WHITE CLOUD AND RELATED PEGMATITES, SOUTH PLATTE AREA, JEFFERSON COUNTY, COLORADO: GSA BULL., V. 76, NO. 4, P. 441-462.}{Deposit:: BRYANT, BRUCE, 1974, RECONNAISSANCE GEOLOGIC MAP OF THE PINE QUADRANGLE, JEFFERSON COUNTY, COLORADO: USGS MAP MF-598}
Reporter	Schwochow, Stephen D.