Mt. Judge Beryl Pegmatite

The Mt. Judge Beryl Pegmatite is a beryllium mine located in Clear Creek county, Colorado at an elevation of 9,600 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: Mt. Judge Beryl Pegmatite  

State:  Colorado

County:  Clear Creek

Elevation: 9,600 Feet (2,926 Meters)

Primary Mineral: Beryllium

Lat, Long: 39.6675, -105.44944

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 Mt. Judge Beryl Pegmatite

Mt. Judge Beryl Pegmatite MRDS details

Site Name

Primary: Mt. Judge Beryl Pegmatite


Commodity

Primary: Beryllium
Tertiary: Feldspar


Location

State: Colorado
County: Clear Creek
District: Clear Creek Pegmatite Province


Land Status

Land ownership: Federal
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: Past Producer
Operation Type: Unknown
Year First Production: 1942
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: TABULAR


Structure

Type: R
Description: Front Range Uplift, Denver Basin

Type: L
Description: Kennedy Gulch Fault Zone


Alterations

Not available


Rocks

Name: Pegmatite
Role: Associated
Age Type: Host Rock Unit
Age Young: Neoproterozoic

Name: Pegmatite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Neoproterozoic

Name: Pegmatite
Role: Associated
Age Type: Associated Rock
Age Young: Neoproterozoic

Name: Pegmatite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic


Analytical Data

Not available


Materials

Ore: Beryl
Ore: Microcline
Gangue: Plagioclase
Gangue: Biotite


Comments

Comment (Location): ON NE SIDE OF MT. JUDGE ; INFO FROM LAND.ST :(1975)

Comment (Development): BERYL ORE COBBED OUT IN 1942

Comment (Deposit): NE-TRENDING SWARM OF PEGMATITES CUTS ACROSS FOLIATION OF HORNBLENDE AND CALC-SILICATE GNEISS. PINK MICROCLINE AND ALBITE WITH QUARTZ IN BORDER ZONE; GRAPHIC PEGMATITE BORDERING CORE; 2-FT CORE OF BLACK QUARTZ AND BERYL.


References

Reference (Deposit): BOOS, M.F., 1954, GENESIS OF PRECAMBRIAN PEGMATITES IN THE DENVER MOUNTAIN PARKS AREA, COLORADO: GSA BULL., V. 65, P. 115-142

Reference (Deposit): SHERIDAN, D.M., AND MARSH, S.P., 1976, GEOLOGIC MAP OF THE SQUAW PASS QUADRANGLE, CLEAR CREEK, JEFFERSON, AND GILPIN COUNTIES, COLORADO: USGS MAP GQ-1337