Mine detail: Rosemont Mine

Previously called ''

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Location

Lat / long: 38.67806, -105.48336

Resource(B)

Primary: Feldspar, Mica
Secondary: Bismuth
Ore: Bismutite, Microcline, Muscovite
Gangue: Biotite, Garnet
Discovery year: 1950

Production

Operation type: Surface
Production size: Small
Development status: Past Producer
First production started: 1950

Geology

Host type:Gneiss
Associated rock:Quartz Diorite Of Boulder Creek Age
Associated type:Diorite
Structure:Southern Front Range, Thirtynine Mile Volcanic Field
Tectonic:Central Cordillera (Southern Rocky Mountains)

References

MRDSD009867
DEP10013519
Reference{Deposit:: HANLEY, J.B., HEINRICH, E.W., PAGE, L.R., 1950, PEGMATITE INVESTIGATIONS IN COLORADO, WYOMING, AND UTAH, 1942-1944: USGS PROFESSIONAL PAPER 227, P. 42-55}{Deposit:: WOBUS, 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.}{Deposit:: STERRETT, D.B., 1923, MICA DEPOSITS OF THE UNITED STATES: USGS BULLETIN 740, P. 51-55}{Reserve-Resource:: HANLEY, J.B. AND OTHERS, 1950}
ReporterCollins, Donna B.