Pine Ridge Pegmatite

The Pine Ridge Pegmatite is a feldspar mine located in Fremont county, Colorado at an elevation of 8,799 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

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Site Name

Primary: Pine Ridge Pegmatite

Commodity

Primary: Feldspar
Secondary: REE

Location

State: Colorado
County: Fremont
District: Cotopaxi pegmatite region

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

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Discovery Year: 1941
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

Model Name: Pegmatites

Orebody

Not available

Structure

Type: R
Description: Northern Wet Mountains, Thirtynine Mile Volcanic Field

Type: L
Description: Cotopaxi And Texas Creek Faults

Alterations

Not available

Rocks

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

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

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

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

Analytical Data

Not available

Materials

Ore: Microcline
Ore: Fluorite
Ore: Gadolinite
Gangue: Biotite
Gangue: Plagioclase
Gangue: Quartz
Gangue: Sericite

Comments

Comment (Location): ALONG INDIAN GULCH ; INFO FROM LAND.ST :(1976)

Comment (Deposit): POORLY EXPOSED, NARROW

Comment (Workings): 10-FT TRENCH

References

Reference (Deposit): Hanley, J.B., Heinrich, E.W., and Page, L.R., 1950, Pegmatite investigations in Colorado, Wyoming, and Utah 1942-1944, U.S.G.S. Professional Paper 227, 125 p.

Reference (Deposit): TAYLOR, R. B., SCOTT, G. R., WOBUS, R. A., EPIS, R. C., 1975, RECONNAISSANCE GEOLOGIC MAP OF THE COTOPAXI 15-MINUTE QUADRANGLE, FREMONT AND CUSTER COUNTIES, COLORADO: USGS MAP I-900, 1:62,500

Reference (Deposit): HEINRICH, E. W., 1948, FLUORITE-RARE EARTH MINERAL PEGMATITES OF CHAFFEE AND FREMONT COUNTIES, COLORADO: AMERICAN MINERALOGIST, V. 33, NOS. 1-2, P. 72

Colorado Mining Photos

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