Commodities
PrimaryBeryllium
TertiaryFeldspar, Mica, Quartz, REE
Commodity typeB
Materials
Ore mineralsBeryl, Microcline, Monazite, Muscovite, Quartz
Geology
Host rockGneiss · Idaho Springs Formation-Microcline-Quartz-Plagioclase-Biotite Gneiss Unit
Associated rockPegmatite · Granitic Pegmatite
StructureFront Range Uplift, Denver Basin, Junction Ranch Fault System, Unnamed Anticline
Tectonic settingCentral Cordillera (Southern Rocky Mtns)
Economic & production
Development statusProducer
Identification
Deposit ID10013731
MRDS IDD010189
Alternate namesK-L Green Ranch
RegionNA
Data scoreB
Coordinates39.75416, -105.35752
References
SHERIDAN, D.M., AND OTHERS, 1967, GEOLOGY AND URANIUM DEPOSITS OF THE RALSTON BUTTES DISTRICT, JEFFERSON COUNTY, COLORADO: USGS PROF. PAPER 520 (INCL. GEOLOGIC MAP OF RALSTON BUTTES QUAD)HANLEY, J.B., AND OTHERS, 1950, PEGMATITE INVESTIGATIONS IN COLORADO, WYOMING, AND UTAH, 1942-44: USGS PROF. PAPER 227, P. 85-86WALDSCHMIDT, W.A., AND ADAMS, J.W., 1942, THE BERYL-MONAZITE PEGMATITE DIKE OF CENTENNIAL CONE, COLORADO: COLORADO SCHOOL OF MINES QUART., V. 37, NO. 3, P. 29-38USBM MIN. EXAM. FILE, REPT. OF 4/23/59 (FROM ORIGINAL CRIB RECORD)ORIGINAL CRIB RECORD (PROBABLY USBM REFERENCE)