Penley No.1 Lease

The Penley No.1 Lease is a uranium mine located in Douglas county, Colorado at an elevation of 6,401 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

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Site Name

Primary: Penley No.1 Lease

Commodity

Primary: Uranium

Location

State: Colorado
County: Douglas
District: Kassler Area

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

Type: Surface/Underground

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Occurrence
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, Pikes Peak Batholith

Type: L
Description: Perry Park-Jarre Canyon Fault

Alterations

Alteration Type: L
Alteration Text: Granite Is Described As Being Altered And Radioactive

Rocks

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

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

Analytical Data

Analytical Data: RANGE OF RADIOACTIVITY-0.017 TO 1.0 MR/HR
Analytical Data: BACKGROUND RADIATION-0.017 MR/HR

Materials

Ore: Carnotite

Comments

Comment (Development): ONE 120 FT SHAFT WAS SUNK. FOUR TEST PITS AND SIX HOLES WERE DRILLED

Comment (Deposit): MINERALIZATION FOUND IN ALTERED GRANITE IN PERRY PARK-JARRE CANYON FAULT ZONE

Comment (Workings): 120-FT SHAFT; TEST PITS

Comment (Geology): RADIOACTIVITY ALSO OCCURS IN THE SHEAR ZONE BETWEEN THE ROCK TYPES

Comment (Location): 0.5 TO 1.0 MILE NORTH OF JARRE CANYON ; INFO FROM LAND.ST :(1976)

References

Reference (Deposit): NELSON-MOORE, J.L., COLLINS, D.B., AND HORNBAKER, A.L., 1978, RADIOACTIVE MINERAL OCCURRENCES OF COLORADO AND BIBLIOGRAPHY: COLORADO GEOLOGICAL SURVEY BULL. 40, P. 132

Reference (Deposit): SCOTT, G.R., 1963, BEDROCK GEOLOGY OF THE KASSLER QUADRANGLE, COLORADO: USGS PROF, PAPER 421-B, P. 116.

Colorado Mining Photos

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