J & S Group

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

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

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

Colorado Mining Photos

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