Commodities
PrimaryFeldspar, Quartz
TertiaryNiobium (Columbium), Tantalum, Thorium, REE
Commodity typeB
Deposit
Deposit sizeS
WorkingsUnknown
Orebody formELLIPTICAL
Materials
Ore mineralsGadolinite, Quartz
GangueAlbite, Bastnaesite, Biotite, Cleavelandite, Fergusonite, Fluorite, Hematite, Kaolinite, Microlite, Monazite, Prochlorite, Sericite, Thalenite, Thorite, Topaz, Xenotime, Zircon
Geology
Host rockPegmatite · Pegmatite;Pikes Peak Granite
Associated rockPegmatite,Granite · Pegmatite;Pikes Peak Granite
StructureFront Range Uplift, Pikes Peak Batholith, Kennedy Gulch Fault Zone
Tectonic settingCentral Cordillera (Southern Rocky Mtns)
AlterationFeldspar And Biotite Alteration, Fluorite Replacement, Sericitization, Deuterogenic Alteration
Economic & production
Development statusPast Producer
Last production1968
Identification
Deposit ID10087817
MRDS IDD010163
Alternate namesClaim: White Cloud
RegionNA
Data scoreB
Coordinates39.395, -105.17614
References
SIMMONS, W.B., AND HEINRICH, E.W., 1980, RARE-EARTH PEGMATITES OF THE SOUTH PLATTE DISTRICT, COLORADO: CGS RESOURCE SER. 11, 131 P.PETERSON, W.L., 1964, GEOLOGY OF THE PLATTE CANYON QUADRANGLE, COLORADO: USGS BULL. 1181-C, 23 P., 1 PL.ADAMS, J.W., AND SHARP, W.N., 1971, THALENITE IN THE WHITE CLOUD PEGMATITE, SOUTH PLATTE DISTRICT, JEFFERSON COUNTY, COLORADO (ABS.): CANADIAN MINERALOGIST, V. 10, P. 907.ADAMS, J.W., AND SHARP, W.N., 1972, THALENITE AND ALLANITE DERIVED FROM YTTROFLUORITE IN THE WHITE CLOUD PEGMATITE, SOUTH PLATTE AREA, COLORADO: USGS PROF. PAPER 800-C, P. C63-C69.HAYNES, C.V., JR., 1958, RARE-EARTH MINERALIZATION IN THE WHITE CLOUD MINE NEAR SOUTH PLATTE, JEFFERSON COUNTY, COLORADO (ABS.): GSA BULL., V. 69, NO. 12, PT. 2, P. 1729-1730.HAYNES, C.V., JR., 1965, GENESIS OF THE WHITE CLOUD AND RELATED PEGMATITES, SOUTH PLATTE AREA, JEFFERSON COUNTY, COLORADO: GSA BULL., V. 76, NO. 4, P. 441-461.COLORADO DIV. MINES ANN. OPERATORS REPTS.