Mine detail: Colfelco Pegmatite

Previously called ''

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Location

Lat / long:

38.46251, -105.3564

Resource(B)

Primary:	Feldspar
Secondary:	Mica
Tertiary:	Beryllium
Ore:	Beryl, Microcline
Gangue:	Garnet, Magnetite, Quartz
Orebody form:	SHEET-LIKE
Other material:	Muscovite
Discovery year:	1945

Production

Operation type:	Unknown
Production size:	Small
Development status:	Producer
First production started:	1947

Geology

Host type:	Diorite,Pegmatite
Associated rock:	Quartz Diorite;Granodiorite
Associated type:	Diorite
Structure:	Southern Front Range, Canon City Embayment, Eightmile Park, Ne-Trending Faults
Tectonic:	Central Cordillera (Southern Rocky Mountains)

References

MRDS	D009889
DEP	10107986
Reference	{Deposit:: HEINRICH, E. W., 1948, PEGMATITES OF EIGHT MILE PARK, FREMONT COUNTY, COLORADO: THE AMERICAN MINERALOGIST, V. 33, NOS. 7-10, P. 420-448, 550-587}{Deposit:: TAYLOR, R. B., SCOTT, G. R., WOBUS, R. A. AND EPIS, R. C., 1975, RECONNAISSANCE GEOLOGIC MAP OF THE ROYAL GORGE QUADRANGLE, FREMONT AND CUSTER COUNTIES, COLORADO: USGS MAP I-869, 1:250,000}
Reporter	Collins, Donna B.