The Broken Thumb Prospects is a uranium and vanadium mine located in Dolores county, Colorado at an elevation of 7,221 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: 7,221 Feet (2,201 Meters)
Commodity: Uranium, Vanadium
Lat, Long: 37.80389, -108.78667
Map: View on Google Maps
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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.
Broken Thumb Prospects MRDS details
Site Name
Primary: Broken Thumb Prospects
Secondary: Broken Thumb Nos. 1-3 Prospects
Commodity
Primary: Uranium
Primary: Vanadium
Location
State: Colorado
County: Dolores
District: Slick Rock District
Land Status
Land ownership: National Forest
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.
Administrative Organization: San Juan N. F.
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Year: 1971
Time Period: -1971
Material type: ORE U V ACC
Description: Cp_Grade: ^0.20% U308, 2.48% V205
Deposit
Record Type: Site
Operation Category: Past Producer
Deposit Type: Stratiform
Operation Type: Unknown
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Intermontane Plateaus
Physiographic Province: Colorado Plateaus
Physiographic Section: Canyon Lands
Mineral Deposit Model
Model Name: Sandstone U
Orebody
Form: LENTICULAR, TABULAR
Structure
Type: R
Description: Paradox Basin, Paradox Fold And Fault Belt, Glade Zone Of Faults
Type: L
Description: Dolores Anticline, Glade Graben, Sage Plain Terrace
Alterations
Alteration Type: L
Alteration Text: Alteration Of Pyrite To Limonite; Calcitization; Carbonation Of Plant Detritus
Rocks
Name: Mudstone
Role: Host
Age Type: Host Rock Unit
Age Young: Late Jurassic
Name: Mudstone
Role: Host
Age Type: Host Rock
Age Young: Late Jurassic
Analytical Data
Not available
Materials
Ore: Tyuyamunite
Ore: Carnotite
Gangue: Limonite
Gangue: Calcite
Gangue: Pyrite
Comments
Comment (Deposit): MINE LIES ON GENTLY SW-DIPPING FLANK OF DOLORES ANTICLINE NEAR ITS OFFSET BY N 70 W-TRENDING GLADE GRABEN.
Comment (Location): (LAND STATUS AND ADMINISTRATIVE AREA LOCATIONS CALCULATED USING GIS OVERLAY ANALYSIS FOR SAN JUAN N. F.). IN DOLORES CANYON WEST OF DOLORES RIVER 2 MILES NE OF MOUNTAIN SHEEP POINT. ; INFO FROM LAND.ST :1980
References
Reference (Production): NELSON-MOORE AND OTHERS, 1978
Reference (Deposit): NELSON-MOORE, J.L., AND OTHERS, 1978, RADIOACTIVE MINERAL OCCURRENCES OF COLORADO AND BIBLIOGRAPHY. CGS BULL. 40, P. 129.
Reference (Deposit): HAYNES, D.D., AND OTHERS, 1972, GEOLOGY, STRUCTURE, AND URANIUM DEPOSITS OF THE CORTEZ QUADRANGLE, COLORADO AND UTAH: USGS MAP I-629.
Reference (Deposit): SHAWE, D.R., AND OTHERS, 1968, STRATIGRAPHY OF SLICK ROCK DISTRICT AND VICINITY, SAN MIGUEL AND DOLORES COUNTIES, COLORADO: USGS PROF. PAPER 576-A, 108 P.
Reference (Deposit): SHAWE, D.R., 1970, STRUCTURE OF THE SLICK ROCK DISTRICT AND VICINITY, SAN MIGUEL AND DOLORES COUNTIES, COLORADO: USGS PROF. PAPER 576-C, 18 P.
Reference (Deposit): SHAWE, D.R., 1976, SEDIMENTARY ROCK ALTERATION IN THE SLICK ROCK DISTRICT, SAN MIGUEL AND DOLORES COUNTIES, COLORADO: USGS PROF. PAPER 576-D, 51 P.
Colorado Mining Photos
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