Description
Frank Ogden, Vallie, Co
Commodities
PrimaryFeldspar
SecondaryREE
Commodity typeB
Deposit
Model32: Pegmatites
Deposit sizeN
Ore controlPegmatite
Materials
Ore mineralsFluorite, Gadolinite, Microcline
GangueBiotite, Plagioclase, Quartz, Sericite
Geology
Host rockDiorite,Gneiss · Migmatitic Gneiss
Associated rockDiorite · Granodiorite
StructureNorthern Wet Mountains, Thirtynine Mile Volcanic Field, Cotopaxi And Texas Creek Faults
Tectonic settingCentral Cordillera (Southern Rocky Mountains)
Economic & production
Development statusOccurrence
Discovery year1941
Identification
Deposit ID10013538
MRDS IDD009892
RegionNA
Data scoreB
Coordinates38.48751, -105.6728
References
HEINRICH, E. W., 1948, FLUORITE-RARE EARTH MINERAL PEGMATITES OF CHAFFEE AND FREMONT COUNTIES, COLORADO: AMERICAN MINERALOGIST, V. 33, NOS. 1-2, P. 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, 1:62,500Hanley, J.B., Heinrich, E.W., and Page, L.R., 1950, Pegmatite investigations in Colorado, Wyoming, and Utah 1942-1944, U.S.G.S. Professional Paper 227, 125 p.