Mine detail: Mary Lee Mine

Previously called 'Little Bear MineLittle Bear No. 2 Mine'

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Location

Lat / long: 39.07583, -105.42891

Resource(M)

Primary: Beryllium
Secondary: Tungsten
Tertiary: Molybdenum, Uranium, REE, Lead, Zinc, Arsenic, Iron, Copper, Tin
Ore: Bertrandite, Beryl, Cassiterite, Chalcopyrite, Covellite, Euclase, Galena, Molybdenite, Pyrite, Sphalerite, Uraninite, Wolframite
Gangue: Barite, Fluorite, Muscovite, Quartz, Siderite, Topaz
Orebody form: CUPOLAS, PODS, IRREGULAR LENSES
Discovery year: 1957

Production

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

Geology

Host type:Gneiss,Granite
Associated rock:Redskin Granite;Boulder Creek Granodiorite
Associated type:Granite
Structure:Tarryall Mountains, Front Range, Puma Hills, Badger Flats, Badger Flats Fault, Minor Faults, Round Mountain Syncline
Tectonic:Central Cordillera (Southern Rocky Mountains)
Alteration processes:Greisenization

References

MRDSD010281
DEP10013792
Reference{Deposit:: 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.}{Deposit:: 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.}{Deposit:: 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.}{Deposit:: 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.}{Deposit:: SIEMS, P.L., 1963, BERYLLIUM: COLORADO SCHOOL OF MINES MINERAL INDUSTRIES BULLETIN, V.6, NO. 3 15 P.}{Deposit:: WORCESTER, P.G., 1919, MOLYBDENUM DEPOSITS OF COLORADO: CGS BULLETIN 14, P. 73-74.}{Deposit:: MEEVES, H.C., HARRER, C.M., SALSBURY, M.H., KONSELMAN, A.S., SHANNON S.S., JR., 1966, RECONNAISSANCE OF BERYLLIUM-BEARING PEGMATITE DEPOSITS IN SIX WESTERN STATES: ARIZONA, COLORADO, NEW MEXICO, SOUTH DAKOTA, UTAH, AND WYOMING: USBM INFORMATION CIRCULAR 8298, P. 30}
ReporterCollins, Donna B.