Little John Mine

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

Name: Little John Mine  

State:  Colorado

County:  Park

Elevation: 8,399 Feet (2,560 Meters)

Commodity: Beryllium

Lat, Long: 39.07167, -105.42139

Map: View on Google Maps

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.


Satelite image of the Little John Mine

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

Placer mines at Cripple Creek, Colorado ca. 1892

Check out this collection of Colorado's best historic mining photos: Incredible Photos of Colorado Mining Scenes.