The J & S Group is a beryllium mine located in Park county, Colorado at an elevation of 8,589 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: 8,589 Feet (2,618 Meters)
Commodity: Beryllium
Lat, Long: 39.07889, -105.45111
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J & S Group MRDS details
Site Name
Primary: J & S Group
Secondary: J & S No. 1
Secondary: J & S No. 2
Secondary: J & S No. 3
Commodity
Primary: Beryllium
Tertiary: Molybdenum
Tertiary: Tungsten
Tertiary: 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: Private
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
Type: Underground
Ownership
Owner Name: W. F. Shaw And Others
Years: 1982 -
Production
Year: 1966
Time Period: 1956-1966
Material type: BE ORE ACC
Description: Cp_Grade: ^9.25 % Beo
Deposit
Record Type: Site
Operation Category: Past Producer
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, Boomer Cupola
Alterations
Alteration Type: L
Alteration Text: Greisenization
Rocks
Name: Granite
Role: Associated
Age Type: Host Rock Unit
Age Young: Neoproterozoic
Name: Granite
Role: Associated
Age Type: Associated Rock
Age Young: Neoproterozoic
Analytical Data
Analytical Data: SAMPLES TAKEN IN 1959-1969 RANGE FROM: 0.0003-1.7 % BE, 0-.0003 % AG, 0.003-0.03 % CU, 0.0015 % MO, 0.07-0.15 % PB, 0.015 % SN, 0.03-0.07 % ZN
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: Uraninite
Ore: Wolframite
Ore: Covellite
Ore: Molybdenite
Ore: Sphalerite
Ore: Galena
Ore: Chalcopyrite
Ore: Beryl
Ore: Bertrandite
Ore: Euclase
Gangue: Fluorite
Gangue: Topaz
Gangue: Siderite
Gangue: Muscovite
Gangue: Quartz
Comments
Comment (Production): ORE UPGRADED BY HAND SELECTION FROM J & S NO. 1 CLAIM
Comment (Workings): THE GROUP CONSISTS OF 3 MINES OPENED BY SHAFTS, DRIFTS, CROSSCUTS; NO. 1 SHAFT OPENS INTO FOUR LEVELS (AT 22, 37, 50, 60 FT BELOW COLLAR); NO. 2 SHAFT OPENS INTO TWO LEVELS (AT 39, 59 FT BELOW COLLAR); NO. 3 MINE HAS 80-FT LONG DRIFT FROM BOTTOM OF 60-FT SHAFT
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 (Commodity): NONPEGMATITIC BERYLLIUM DEPOSITS; BERYL OCCURS AS HEXAGONAL CRYSTALS AND MASSIVE POIKILOBLASTIC GRAINS.
Comment (Development): CLAIMS PATENTED IN 1910
Comment (Location): BOOMER MINE AREA; POINT LOCATIONS GIVEN FOR J & S NO. 1 ; INFO FROM LAND.ST :(1976)
References
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.
Reference (Deposit): WORCESTER, P.G., 1919, MOLYBDENUM DEPOSITS OF COLORADO: CGS BULLETIN 14, P. 73-74.
Reference (Production): MEEVES, H.C., 1956
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