Commodities
PrimaryFeldspar
SecondaryREE
Commodity typeB
Deposit
Model32: Pegmatites
Deposit sizeS
Ore controlPegmatite
Materials
Ore mineralsEuxenite, Fluorite, Microcline, Monazite
GangueBiotite, Calcite, Hematite, Magnetite, Plagioclase, Quartz, Sericite
Geology
Host rockGneiss · Migmatitic Gneiss
Associated rockDiorite · Granodiorite
StructureNorthern Wet Mountains, Thirtynine Mile Volcanic Field, Cotopaxi Fault, Texas Creek Fault
Tectonic settingCentral Cordillera (Southern Rocky Mountains)
Economic & production
Development statusPast Producer
First production1939
Identification
Deposit ID10101828
MRDS IDD009893
RegionNA
Data scoreB
Coordinates38.4264, -105.66586
References
HEINRICH, E. W., 1948, FLUORITE-RARE EARTH MINERAL PEGMATITES OF CHAFFEE AND FREMONT COUNTIES, COLORADO: AMERICAN MINERALOGIST, V. 33, NOS. 1-2, P. 71-72TAYLOR, 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