Mine detail: Little Abner Pegmatite

Previously called ''

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Location

Lat / long:

39.76582, -105.34919

Resource(B)

Primary:	Beryllium, REE, Feldspar
Ore:	Beryl, Microcline
Gangue:	Garnet, Monazite
Orebody form:	TABULAR

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer

Geology

Host rock:	Idaho Springs Formation---Hornblende Gneiss Unit
Host type:	Gneiss,Amphibolite
Associated rock:	Granitic Pegmatite
Associated type:	Pegmatite
Structure:	Front Range Uplift, Denver Basin, Junction Ranch Fault System, Unnamed Anticline, Unnamed Overturned Anticline
Tectonic:	Central Cordillera (Southern Rocky Mtns)

References

MRDS	D010195
DEP	10101838
Reference	{Deposit:: SHERIDAN, D.M., AND OTHERS, 1967, GEOLOGY AND URANIUM DEPOSITS OF THE RALSTON BUTTES DISTRICT, JEFFERSON COUNTY, COLORADO: USGS PROF. PAPER 520 (INCL. GEOLOGIC MAP OF RALSTON BUTTES QUAD)}{Deposit:: PARKER, R.L., 1963, NIOBIUM AND TANTALUM IN THE UNITED STATES: USGS MAP MR-36}{Deposit:: MEEVES, H.C., AND OTHERS, 1966, RECONNAISSANCE OF BERYLLIUM-BEARING PEGMATITE DEPOSITS IN SIX WESTERN STATES: USBM IC-8298, P. 28.}{Deposit:: USBM MIN. EXAM. FILE, REPT. 6/1/59 (FROM ORIGINAL CRIB RECORD)}{Production:: ORIGINAL CRIB RECORD (SEE USBM REFERENCE)}
Reporter	Schwochow, Stephen D.