The Little John Mine is a beryllium mine located in Park county, Colorado at an elevation of 8,399 feet.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
Elevation: 8,399 Feet (2,560 Meters)
Commodity: Beryllium
Lat, Long: 39.07167, -105.42139
Map: View on Google Maps
Satelite View
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Little John Mine MRDS details
Site Name
Primary: Little John Mine
Secondary: Little John No. 1
Secondary: Little John No. 2
Commodity
Primary: Beryllium
Secondary: Molybdenum
Secondary: Tungsten
Secondary: Uranium
Tertiary: Lead
Tertiary: Zinc
Tertiary: Arsenic
Tertiary: Iron
Tertiary: Copper
Tertiary: Tin
Location
State: Colorado
County: Park
District: Lake George (Badger Flats) Beryllium Area (Mountain Dale District)
Land Status
Land ownership: National Forest
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Discovery Year: 1955
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Southern Rocky Mountains
Mineral Deposit Model
Not available
Orebody
Form: CUPOLAS, PODS, IRREGULAR LENSES
Structure
Type: R
Description: Tarryall Mountains, Front Range, Puma Hills, Badger Flats
Type: L
Description: Badger Flats Fault, Minor Faults, Round Mountain Syncline
Alterations
Alteration Type: L
Alteration Text: Greisenization
Rocks
Name: Granite
Role: Associated
Age Type: Associated Rock
Age Young: Neoproterozoic
Name: Granite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic
Analytical Data
Analytical Data: 0.0007% BE, 0.015% CU, 0.07% PB, 0.015% SN (FROM LITTLE JOHN NO.1 SHAFT)
Analytical Data: MASSES OF GALENA CONTAIN 0.3-0.7% AG, 0.3-1.5% BI, 0.007-0.7% CU
Materials
Ore: Pyrite
Ore: Cassiterite
Ore: Wolframite
Ore: Molybdenite
Ore: Sphalerite
Ore: Galena
Ore: Euclase
Ore: Bertrandite
Ore: Chalcopyrite
Ore: Uraninite
Ore: Covellite
Ore: Beryl
Gangue: Topaz
Gangue: Muscovite
Gangue: Siderite
Gangue: Fluorite
Gangue: Quartz
Comments
Comment (Deposit): THE REDSKIN STOCK IS ZONED, WITH NEARLY ALL OF THE BERYLLIUM DEPOSITS OCCURRING IN THE GRANITE-APLITE OR PORPHYRITIC GRANITE FACIES OF THE GREISENIZED REDSKIN GRANITE. EVEN THOSE DEPOSITS NOT ACTUALLY IN THE REDSKIN GRANITE ARE SPATIALLY AND GENETICALLY RELATED TO IT.
Comment (Workings): SHAFTS, PITS, TRENCHES
Comment (Commodity): NONPEGMATITIC BERYLLIUM DEPOSITS; BERYL OCCURS AS HEXAGONAL CRYSTALS AND MASSIVE POIKILOBLASTIC GRAINS.
Comment (Location): MARY LEE MINE AREA ; INFO FROM LAND.ST :(1976)
References
Reference (Deposit): WORCESTER, P.G., 1919, MOLYBDENUM DEPOSITS OF COLORADO: CGS BULLETIN 14, P. 73-74.
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.
Reference (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.
Reference (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.
Reference (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.
Reference (Deposit): SIEMS, P.L., 1963, BERYLLIUM: COLORADO SCHOOL OF MINES MINERAL INDUSTRIES BULLETIN, V.6, NO. 3 15 P.
Colorado Mining Photos
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