Commodities
PrimaryMica, Feldspar
SecondaryBismuth
Commodity typeB
Deposit
Model32: Pegmatites
Deposit sizeS
WorkingsUnknown
Materials
Ore mineralsBismutite, Microcline, Muscovite
GangueBiotite, Garnet
Geology
Host rockGneiss
Associated rockDiorite · Quartz Diorite Of Boulder Creek Age
StructureSouthern Front Range, Thirtynine Mile Volcanic Field
Tectonic settingCentral Cordillera (Southern Rocky Mountains)
Economic & production
Development statusPast Producer
First production1950
Discovery year1950
Identification
Deposit ID10013519
MRDS IDD009867
Alternate namesEast
RegionNA
Data scoreB
Coordinates38.69391, -105.478
References
HANLEY, J.B., HEINRICH, E.W., PAGE, L.R., 1950, PEGMATITE INVESTIGATIONS IN COLORADO, WYOMING, AND UTAH, 1942-1944: USGS PROFESSIONAL PAPER 227, P. 42-55WOBUS, R.A., EPIS, R.C. AND SCOTT, G.R., 1979, GEOLOGIC MAP OF THE COVER MOUNTAIN QUADRANGLE, FREMONT, PARK, AND TELLER COUNTIES, COLORADO: USGS MAP I-1179, 1:62,500.STERRETT, D.B., 1923, MICA DEPOSITS OF THE UNITED STATES: USGS BULLETIN 740, P. 51-55MINOBRAS, 1974, Colorado and Utah Industrial Minerals.HANLEY, J.B. AND OTHERS, 1950