Centennial Cone Prospect

The Centennial Cone Prospect is a beryllium mine located in Jefferson county, Colorado at an elevation of 8,360 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: Centennial Cone Prospect
Secondary: K-L Green Ranch

Commodity

Primary: Beryllium
Tertiary: Feldspar
Tertiary: Mica
Tertiary: Quartz
Tertiary: REE

Location

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

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

Not available

Ownership

Owner Name: K. L. And G. S. Green
Home Office: Golden, Co.
Years: 1961 -

Owner Name: Alaska International Corp.
Home Office: Albuquerque, N.M.
Years: 1961 -

Production

Not available

Deposit

Record Type: Site
Operation Category: Producer
Operation Type: Unknown
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

Not available

Structure

Type: R
Description: Front Range Uplift, Denver Basin

Type: L
Description: Junction Ranch Fault System, Unnamed Anticline

Alterations

Not available

Rocks

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

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

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

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

Analytical Data

Not available

Materials

Ore: Beryl
Ore: Microcline
Ore: Quartz
Ore: Monazite
Ore: Muscovite

Comments

Comment (Development): DEPOSIT HAS BEEN WORKED ONLY FOR MINERAL SPECIMENS

Comment (Workings): OPEN CUT

Comment (Location): ON NORTH FLANK OF CENTENNIAL CONE ; INFO FROM LAND.ST :(1975)

Comment (Production): PRESUMED CUMULATIVE PRODUCTION, YEARS UNKNOWN

References

Reference (Deposit): SHERIDAN, D.M., AND OTHERS, 1967, GEOLOGY AND URANIUM DEPOSITS OF THE RALSTON BUTTES DISTRICT, JEFFERSON COUNTY, COLORADO: USGS PROF. PAPER 520 (INCL. GEOLOGIC MAP OF RALSTON BUTTES QUAD)

Reference (Deposit): HANLEY, J.B., AND OTHERS, 1950, PEGMATITE INVESTIGATIONS IN COLORADO, WYOMING, AND UTAH, 1942-44: USGS PROF. PAPER 227, P. 85-86

Reference (Deposit): WALDSCHMIDT, W.A., AND ADAMS, J.W., 1942, THE BERYL-MONAZITE PEGMATITE DIKE OF CENTENNIAL CONE, COLORADO: COLORADO SCHOOL OF MINES QUART., V. 37, NO. 3, P. 29-38

Reference (Deposit): USBM MIN. EXAM. FILE, REPT. OF 4/23/59 (FROM ORIGINAL CRIB RECORD)

Reference (Production): ORIGINAL CRIB RECORD (PROBABLY USBM REFERENCE)

Colorado Mining Photos

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