Commodities
PrimaryFeldspar, Mica
TertiaryBeryllium, Niobium (Columbium), REE
Commodity typeB
Deposit
Deposit sizeS
Orebody formTABULAR
Materials
Ore mineralsBertrandite, Beryl, Columbite, Microcline, Monazite, Muscovite
GangueAlbite, Biotite, Fluorite, Quartz
Geology
Host rockGneiss · Idaho Springs Formation---Feldspar-Rich Gneiss
Associated rockPegmatite · Pegmatite
StructureFront Range Uplift, Denver Basin, Floyd Hill Fault Zone, Unnamed Anticline, Unnamed Overturned Syncline
Tectonic settingCentral Cordillera (Southern Rocky Mtns)
Economic & production
Development statusPast Producer
Identification
Deposit ID10013763
MRDS IDD010227
RegionNA
Data scoreB
Coordinates39.70749, -105.44003
References
HANLEY, J.B., AND OTHERS, 1950, PEGMATITE INVESTIGATIONS IN COLORADO, WYOMING, AND UTAH, 1942-44: USGS PROF. PAPER 227, P. 29-30SHERIDAN, D.M., AND MARSH, S.P., 1976, GEOLOGIC MAP OF THE SQUAW PASS QUADRANGLE, CLEAR CREEK, JEFFERSON, AND GILPIN COUNTIES, COLORADO: USGS MAP GQ-1337