Aubrey-Ladwig Mine

The Aubrey-Ladwig Mine is a uranium mine located in Jefferson county, Colorado at an elevation of 7,349 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: Aubrey-Ladwig Mine
Secondary: Aubrey Ladwig Lease
Secondary: Gary Mine

Commodity

Primary: Uranium
Tertiary: Copper

Location

State: Colorado
County: Jefferson
District: Ralston Buttes District

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

Year: 1955
Description: Ap_Grade: ^0.31% U3o8

Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type: Vein
Operation Type: Unknown
Year First Production: 1955
Year Last Production: 1956
Discovery Year: 1954
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: LENTICULAR, IRREGULAR

Structure

Type: R
Description: Front Range Uplift, Denver Basin

Type: L
Description: Hurricane Hill Fault System

Alterations

Not available

Rocks

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

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

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

Analytical Data

Analytical Data: ORE TONNAGES FROM 1955-56 CONTAINED 0.23 TO 0.31% U3O8

Materials

Ore: Pitchblende
Gangue: Fluorite
Gangue: Pyrite

Comments

Comment (Deposit): DEPOSIT LIES IN PEGMATITE THAT DISCORDANTLY CUTS GNEISS ALONG TRANSITION BETWEEN MICA SCHIST AND LAYERED CALC-SILICATE GNEISS OF THE HORNBLENDE GNEISS UNIT. DEPOSIT IS DIFFERENT THAN OTHERS IN DISTRICT IN THAT MINERALIZATION IS NOT ON MAJOR BRECCIA REEF OR BRANCH; WORKINGS DEVELOPED IN NW- AND NE-STRIKING COMPLEX OF SHORT FRACTURES AND SMALL-DISPLACEMENT FAULTS. ORE OCCURS AS FILLINGS AND COATINGS ALONG AND NEAR FRACTURED AND COARSELY BRECCIATED CONTACTS AND AS PODS AND LENSES IN MINERALIZED BRECCIA IN GNEISS.

Comment (Location): NEAR THE HEAD OF THE WESTERN FORK OF HALF-MILE GULCH ; INFO FROM LAND.ST :(1975)

Comment (Workings): EXPLORATORY PITS AND TRENCHES; PRINCIPAL OPEN PIT 60 BY 30 FT IN PLAN AND 35 TO 50 FT DEEP; 74-FT VERTICAL SHAFT WITH 137-FT CROSSCUT, 55 FT OF SHORT DRIFTS AND 40-BY 12-FT INCLINED STOPE

References

Reference (Deposit): SIMS, P.K., AND SHERIDAN, D.M., 1964, GEOLOGY OF URANIUM DEPOSITS IN THE FRONT RANGE, COLORADO: USGS BULL. 1159, P. 93.

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. 190

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

Reference (Production): SHERIDAN AND OTHERS, 1967, P. 75

Colorado Mining Photos

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