Mine detail: Chief #1-5 Mine

Previously called ''

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Location

Lat / long: 38.48334, -105.59558

Resource(B)

Primary: Quartz, Feldspar, Beryllium, Lithium
Secondary: REE
Ore: Beryl, Feldspar, Lepidolite
Gangue: Biotite, Garnet, Magnetite, Topaz, Tourmaline

Production

Operation type: Surface
Production size: Small
Development status: Producer
Production years: 1950-1959
First production started: 1950
Last production ended: 1959

Geology

Host rock:Migmatitic Gneiss
Host type:Schist,Gneiss
Associated rock:Quartz Monzonite Of Silver Plume.Age
Associated type:Quartz Monzonite
Structure:Southern Front Range, Ne-Trending Fault Near Texas Creek Fault
Tectonic:Central Cordillera (Southern Rocky Mtns)

References

MRDSDC05751
DEP10108446
Reference{Deposit:: HEINRICH, E.W. AND VIAN, R.W., 1965, THE CHIEF LITHIUM PEGMATITE, DEVILS HOLE, FREMONT COUNTY, COLORADO: THE AMERICAN MINERALOGIST, V. 50, NOS. 1-2, P. 96-104.}{Deposit:: MEEVES, H.C., HARRER, C.M., SALSBURY, M.H., KONSELMAN, A.S. AND SHANNON, S.S., JR., 1966, RECONNAISSANCE OF BERYLLIUM-BEARING PEGMATITE DEPOSITS IN SIX WESTERN STATES; ARIZONA, COLORADO, NEW MEXICO, SOUTH DAKOTA, UTAH, AND WYOMING: USBM INFORMATION CIRCULAR 8298, 34 P.}{Deposit:: TAYLOR, R.B., SCOTT, G.R., WOBUS, R.A. AND EPIS, R.C., 1975, RECONNAISSANCE GEOLOGIC MAP OF THE COTOPAXI 15-MINUTE QUADRANGLE, FREMONT AND CUSTER COUNTIES, COLORADO: USGS MAP I-900, 1:62,500.}
ReporterUnknown, Collins, Donna B.