Mine detail: Princeton Group

Location:	Douglas County, Colorado, United States, North America
Lat / long:	39.27861, -105.10279
dep_id:	10013802
mrds_id:	D010300
Commodity type:	metallic and nonmetallic
Major mineral:	Feldspar
Trace mineral:	Thorium, REE
Operation type:	Unknown
Production size:	Small ammount of material produced
Development status:	Past Producer
ore:	Microcline
gangue:	Allanite, Biotite, Thorite
Reporter:	Schwochow, Stephen D.
hrock_unit:	Pikes Peak Granite;Pegmatite
hrock_type:	Granite
arock_unit:	Pikes Peak Granite;Pegmatite
arock_type:	Pegmatite,Granite
Structure:	Front Range Uplift, Pikes Peak Batholith, Rampart Range Uplift, Perry Park-Jarre Canyon Fault, Rampart Range Fault, Manitou Park Half Graben
tectonic:	Central Cordillera (Southern Rocky Mtns)
disc_yr:	1960
discr:	M & S, Inc. (Claimants)
References:	Deposit:: MEEVES, H.C., AND OTHERS, 1966, RECONNAISSANCE OF BERYLLIUM-BEARING PEGMATITE DEPOSITS IN SIX WESTERN STATES: USBM IC-8298, P. 24-25. Deposit:: BRYANT, BRUCE, AND OTHERS, 1981, GEOLOGIC MAP OF THE DENVER 1X2 QUADRANGLE, NORTH-CENTRAL COLORADO: USGS MAP I-1163. Deposit:: HEINRICH, E.W., 1957, PEGMATITE PROVINCES OF COLORADO: COLORADO SCHOOL MINES QUART., V. 52, NO. 4, P. 1-22. Deposit:: TRIMBLE, D.E., AND MACHETTE, M.N., 1979, GEOLOGIC MAP OF THE COLORADO SPRINGS-CASTLE ROCK AREA, FRONT RANGE URBAN CORRIDOR, COLORADO: USGS MAP I-857-F. Production:: ORIGINAL CRIB RECORD (PROBABLY USBM MINERAL EXAM. FILE)