Commodities
PrimaryBeryllium
SecondaryMolybdenum, Tungsten, Uranium
TertiaryLead, Zinc, Arsenic, Iron, Copper, Tin
Commodity typeM
Deposit
Deposit sizeN
Orebody formCUPOLAS, PODS, IRREGULAR LENSES
Ore controlGreisenized Rocks; Localized By Fissures, Contacts, Favorable Rock Units
Materials
Ore mineralsBertrandite, Beryl, Cassiterite, Chalcopyrite, Covellite, Euclase, Galena, Molybdenite, Pyrite, Sphalerite, Uraninite, Wolframite
GangueFluorite, Muscovite, Quartz, Siderite, Topaz
Geology
Host rockGneiss,Granite
Associated rockGranite · Redskin Granite;Boulder Creek Granodiorite (Gneiss)
StructureTarryall Mountains, Front Range, Puma Hills, Badger Flats, Badger Flats Fault, Minor Faults, Round Mountain Syncline
Tectonic settingCentral Cordillera (Southern Rocky Mountains)
AlterationGreisenization
Economic & production
Development statusOccurrence
Discovery year1955
Identification
Deposit ID10013790
MRDS IDD010279
Alternate namesLittle John No. 1, Little John No. 2
RegionNA
Data scoreB
Coordinates39.07167, -105.42197
References
HAWLEY, C.C., 1969, GEOLOGY AND BERYLLIUM DEPOSITS OF THE LAKE GEORGE (OR BADGER FLATS) BERYLLIUM AREA, PARK AND JEFFERSON COUNTIES, COLORADO: USGS PROFESSIONAL PAPER 608-A, 44 P.MEEVES, H.C., 1966, NONPEGMATITIC BERYLLIUM OCCURRENCES IN ARIZONA, COLORADO, NEW MEXICO, UTAH, AND FOUR ADJACENT STATES: USBM REPORT OF INVESTIGATIONS 6828, P. 25-34.HAWLEY, C.C. AND GRIFFITTS, W.R., 1968, DISTRIBUTION OF BERYLLIUM, TIN, AND TUNGSTEN IN THE LAKE GEORGE AREA, COLORADO: USGS CIRCULAR 597, 18 P.HAWLEY, C.C. AND WOBUS, R.A., 1977, GENERAL GEOLOGY AND PETROLOGY OF THE PRECAMBRIAN CRYSTALLINE ROCKS, PARK AND JEFFERSON COUNTIES, COLORADO: USGS PROFESSIONAL PAPER 608-B, 77 P.SIEMS, P.L., 1963, BERYLLIUM: COLORADO SCHOOL OF MINES MINERAL INDUSTRIES BULLETIN, V.6, NO. 3 15 P.WORCESTER, P.G., 1919, MOLYBDENUM DEPOSITS OF COLORADO: CGS BULLETIN 14, P. 73-74.