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

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: 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

Colorado Mining Photos

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