Mine detail: Coors Pegmatite

Previously called 'Coors QuarryCoors Feldspar Pegmatite'

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Location

Lat / long:

39.70027, -105.37308

Resource(B)

Primary:	Feldspar, Mica
Tertiary:	REE
Ore:	Albite, Cleavelandite, Microcline
Gangue:	Allanite, Garnet, Magnetite, Muscovite, Quartz
Orebody form:	LENTICULAR

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer
First production started:	1935
Last production ended:	1949

Geology

Host rock:	Idaho Springs Formation---Interlayered Hornblende Gneiss, Calc-Silicate Gneiss, And Amphibolite;Pegmatite
Host type:	Gneiss
Associated rock:	Pegmatite
Associated type:	Pegmatite
Structure:	Front Range Uplift, Denver Basin, Floyd Hill Fault Zone, Unnamed Overturned Anticline
Tectonic:	Central Cordillera (Southern Rocky Mtns)

References

MRDS	D010190
DEP	10013732
Reference	{Deposit:: SHERIDAN, D.M., AND OTHERS, 1972, GEOLOGIC MAP OF THE EVERGREEN QUADRANGLE, JEFFERSON COUNTY, COLORADO: USGS MAP I-786-A.}{Deposit:: MEEVES, H.C., AND OTHERS, 1966, RECONNAISSANCE OF BERYLLIUM-BEARING PEGMATITE DEPOSITS IN SIX WESTERN STATES: USBM IC-8298, P. 27.}{Deposit:: BOOS, M.F., 1954, GENESIS OF PRECAMBRIAN GRANITIC PEGMATITES IN THE DENVER MOUNTAIN PARKS AREA, COLORADO: GSA BULL., V. 65, NO. 2, P. 115-142.}{Deposit:: USBM MIN. EXAM. FILE, REPT. OF 6/29/59 (FROM ORIGINAL CRIB RECORD)}{Production:: ORIGINAL CRIB RECORD (PROBABLY USBM REFERENCE)}
Reporter	Schwochow, Stephen D.