Broken Thumb Prospects

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

Name: Broken Thumb Prospects  

State:  Colorado

County:  Dolores

Elevation: 7,221 Feet (2,201 Meters)

Commodity: Uranium, Vanadium

Lat, Long: 37.80389, -108.78667

Map: View on Google Maps

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.


Satelite image of the Broken Thumb Prospects

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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