Mine detail: Burroughs Feldspar Mine

Previously called 'Sunrise Peak MineTraut-Rudin-Anderson Pegmatite'

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Location

Lat / long:

39.68138, -105.32336

Resource(B)

Primary:	Feldspar, Beryllium, Mica
Secondary:	Niobium (Columbium), Tantalum
Tertiary:	Bismuth, REE, Uranium, Thorium, Lithium
Ore:	Allanite, Beryl, Columbite, Euxenite, Gadolinite, Microcline, Monazite, Muscovite, Pyrochlore, Tantalite, Xenotime
Gangue:	Biotite, Sericite, Topaz, Triphylite
Orebody form:	TABULAR

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer
First production started:	1942
Last production ended:	1944

Geology

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

References

MRDS	D010198
DEP	10013739
Reference	{Deposit:: HANLEY, J.B., AND OTHERS, 1950, PEGMATITE INVESTIGATIONS IN COLORADO, WYOMING, AND UTAH, 1942-44: USGS PROF. PAPER 227, P. 84}{Deposit:: OLSON, J.C., AND ADAMS, J.W., 1962, THORIUM AND RARE EARTHS IN THE UNITED STATES: USGS MAP MR-28}{Deposit:: BOOS, M.F., 1954, GENESIS OF PRECAMBRIAN PEGMATITES IN THE DENVER MOUNTAIN PARKS AREA, COLORADO: GSA BULL., V. 65, P. 115-142}{Deposit:: HEINRICH, E.W., 1947, BEYERITE FROM COLORADO: AM. MINERALOGIST, V. 32, NOS. 11-12, P. 660-669}{Deposit:: MEEVES, H.C., AND OTHERS, 1966, RECONNAISSANCE OF BERYLLIUM-BEARING PEGMATITE DEPOSITS IN SIX WESTERN STATES: USBM IC-8298, P. 29.}{Deposit:: USBM MIN. EXAM. FILE (FROM ORIGINAL CRIB RECORD)}{Production:: ORIGINAL CRIB RECORD (PROBABLY USBM REFERENCE)}
Reporter	Schwochow, Stephen D.