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
Elevation: 7,349 Feet (2,240 Meters)
Commodity: Uranium
Lat, Long: 39.78667, -105.27278
Map: View on Google Maps
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Aubrey-Ladwig Mine MRDS details
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
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