Welsh Shaft

The Welsh Shaft is a uranium mine located in Emery county, Utah at an elevation of 4,459 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

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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.

Site Name

Primary: Welsh Shaft

Commodity

Primary: Uranium
Secondary: Vanadium

Location

State: Utah
County: Emery
District: Green River Desert District

Land Status

Land ownership: BLM Administrative Area
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: Underground

Ownership

Owner Name: Atlas Minerals Corp.

Production

Year: 1966
Material type: U
Description: Ap_Grade: ^.23 % U308
Year: 1965
Material type: U
Description: Ap_Grade: ^.25 % U3o8
Year: 1964
Material type: U
Description: Ap_Grade: ^.30 % U3o8
Year: 1963
Material type: U
Description: Ap_Grade: ^.33 % U3o8
Year: 1965
Material type: V
Description: Ap_Grade: ^.48 % V2o5
Year: 1964
Material type: V
Description: Ap_Grade: ^.56 % V2o5
Year: 1967
Material type: U
Description: Ap_Grade: ^.19 % U3o8

Deposit

Record Type: Site
Operation Category: Producer
Operation Type: Unknown
Discovery Year: 1956
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: L

Physiography

General Physiographic Area: Intermontane Plateaus
Physiographic Province: Colorado Plateaus
Physiographic Section: Canyon Lands

Mineral Deposit Model

Not available

Orebody

Form: PINCH AND SWELL, TABULAR, LENTICULAR

Structure

Type: R
Description: San Rafael Swell, Uinta Basin, Paradox Fold And - Fault Belt

Type: L
Description: Periodic Folds In Sub - Morrison Sediments Saleratus Graben.

Alterations

Alteration Type: L
Alteration Text: Bleaching In Mudstone And Sandstone

Rocks

Name: Sandstone
Role: Host
Age Type: Host Rock
Age Young: Late Jurassic

Name: Sandstone
Role: Host
Age Type: Host Rock Unit
Age Young: Late Jurassic

Analytical Data

Analytical Data: WET ANALYSIS - .265% U3O8, .125% V2O5

Materials

Ore: Tyuyamunite
Ore: Coffinite
Ore: Uraninite
Ore: Montroseite
Gangue: Limonite
Gangue: Pyrite
Gangue: Calcite

Comments

Comment (Workings): THE LENGTH OF THE WORKINGS IS PART OF THE TOTAL WORKINGS LISTED FOR #7 INCLINE GROUP (19,605 FT.) SINCE THE WELSH SHAFT WORKINGS ARE CONNECTED TO THEM.

Comment (Deposit): THE DEPOSITS ARE ELONGATE IN THE DIRECTION OF PALEOCHANNELS.

Comment (Geology): MINERALIZATION IS LARGELY CONFINED TO PALEOCHANNELS AND IS CLOSELY RELATED TO PLANT REMAINS WHICH HAVE BEEN PARTIALLY OR WHOLLY REPLACED BY URANIUM AND/OR VANADIUM MINERALS.

Comment (Location): MORE EXACT MERIDIAN LOCATION SW 1/4 SW 1/4 SE 1/4 SEC. 15, T 21S, R 14E

Comment (Production): ADDITIONAL VANADIUM FIGURE GIVEN IN SAME FORMAT AS D7 : V ACC 3.130 LB IN 1966 . 326 TONS AT .48 % V2O5 ; CUMULATIVE VANADIUM PRODUCTION ( 31,233 LBS ) G8A IS COMBINED WITH PRODUCTION FROM CALYX #2

Comment (Development): L60 ECONOMIC STUDY (1957), ECONOMIC STUDY (1975 - 76)

References

Reference (Deposit): STOKES, W. L., 1952, LOWER CRETACEOUS IN COLORADO PLATEAU: AAPG BULLETIN, VOL. 36 PP. 1766 - 1776

Reference (Deposit): 1956 RECON IAPG - 7TH ANN. FIELD CONF.

Reference (Deposit): 1957 OTHER USAEC - UNPUBLISHED REPORT RME - 98

Reference (Deposit): 1976 OTHER UGMS - BULLETIN (UNPUBLISHED)

Reference (Deposit): JENSEN, H. N., 1953, RECONNAISSANCE OF THE SAN RAFAEL RIVER AREA, EMERY CO., UT.: USAFC RME - 38, MILLION, I., 1957, RECONNAISSANCE OF AND INVESTIGATIONAL DRILLING FOR URANIUM DEPOSITS IN THE SAN RAFAEL RIVER DESERT, UTAH: USAEC RME - 102

Reference (Production): UGMS STUDY - 1973

Reference (Deposit): CRAIG, L. C., AND D. D. DICKEY, 1956, JURASSIC STRATA OF SOUTHEASTERN UTAH AND SOUTHWESTERN COLO.; IAPG GUIDEBOOK 7TH ANNUAL FIELD CONF. PP. 93 - 104

Reference (Deposit): YOUNG, R. G. AND OTHERS, 1957, GEOLOGY OF THE SAN RAFAEL RIVER DESERT MINING DISTRICT, EMERY AND GRAND CO., UTAH: USAEC RME - 98

Reference (Deposit): TRIMBLE, L. M. AND H. H. DOELLING, 1976, GEOLOGY AND URANIUM ORE DEPOSITS OF THE SAN RAFAEL RIVER MINING AREA: UTAH GEOL. AND MIN. SUR. BULL. (UNPUBLISHED)

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