Commodities
PrimaryFeldspar, Mica
SecondaryBeryllium
Commodity typeB
Deposit
Model32: Pegmatites
Deposit sizeS
WorkingsUnknown
Orebody formLENTICULAR
Materials
Ore mineralsBeryl, Microcline, Muscovite
GangueApatite, 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 production1923
Discovery year1923
Identification
Deposit ID10013527
MRDS IDD009877
Alternate namesNorth Mine, Rose Dawn Mica Mine
RegionNA
Data scoreB
Coordinates38.69591, -105.483
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.MINOBRAS, 1974, Colorado and Utah Industrail Minerals.Sterrett, Bulletin 740, p. 51-52.