Dell Mine

The Dell Mine is a fluorine-fluorite mine located in Juab county, Utah at an elevation of 5,650 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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Site Name

Primary: Dell Mine
Secondary: The Claims Now Held Are the Dell
Secondary: Red Hill
Secondary: Big Boy & Oversite

Commodity

Primary: Fluorine-Fluorite
Secondary: Uranium
Secondary: Beryllium

Location

State: Utah
County: Juab
District: Spor Mtn-Thomas Range

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: Ward Leasing Co.

Owner Name: M And M Mining Co.

Production

Year: 1953
Time Period: 1948-1953
Description: Cp_Grade: ^80% F, 3-4% Sio2, 2% Caco3

Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type: Replacement
Operation Type: Unknown
Year First Production: 1948
Discovery Year: 1947
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

General Physiographic Area: Intermontane Plateaus
Physiographic Province: Basin And Range Province
Physiographic Section: Great Basin
Physiographic Detail: Thomas Mountains - Tintic Mountains

Mineral Deposit Model

Not available

Orebody

Form: PIPE-LIKE

Structure

Type: R
Description: Basin & Range

Type: L
Description: Numerous Branching Faults That Are Difficult To Trace Unless They Contain Breccia

Alterations

Alteration Type: L
Alteration Text: Clay Alteration

Rocks

Name: Volcanic Breccia (Agglomerate)
Role: Associated
Age Type: Associated Rock
Age Young: Miocene

Name: Volcanic Breccia (Agglomerate)
Role: Associated
Age Type: Associated Rock Unit
Age Young: Miocene

Analytical Data

Analytical Data: SAMPLE FROM A PIT WEST OF PIPE AVERAGES 93.37% CAF2, 0.73% CACO3, 0.60% SIO2. MAIN ORE BODY (1964) = .028% U3O8, ADIT OF NORTH ORE BODY = .083% U3O8 NORTH ORE BODY 1951: .083% U3O8, VEIN .016% U3O8

Materials

Ore: Fluorite
Gangue: Carnotite
Gangue: Bertrandite

Comments

Comment (Location): SECTION SUBDIVISIONS NW 1/4 NE 1/4 SE 1/4

Comment (Geology): THE AREA IS CUT BY MASSES OF INTRUSIVE BRECCIA THAT RANGE FROM SMALL DIKES (AN INCH OR 2) TO LARGE MASSES (SEVERAL HUNDRED FT ACROSS). ORE RANGED IN COLOR FROM WH-LAVENDER-DARK PURPLE

Comment (Workings): WORKINGS CONSIST OF 2 ADITS, THE LONGEST IS 933 FT, A 50 FT RAISE

Comment (Reserve-Resource): A POTENTIALLY UNDISCOVERED ORE PIPE MAY BE INDICATED BY AN ALTERATION ZONE IN THE DELL ADIT, 400 FT FROM THE PORTAL

Comment (Deposit): MINE HAS BEEN IDLE SINCE 1954. DEPOSITS WERE IN 2 ORE PIPES. THE SMALLER ONE CALL "THE RATTLESNAKE", THE LARGER CALLED "THE DELL" AND ANOTHER SMALLER PIPE CALLED THE "RED HILL"

Comment (Production): MINE HAS BEEN IDLE SINCE 1954 .

Comment (Commodity): CHIEF IMPURITIES ARE MONTMORILLONITE, CREAM COLORED DOLOMITE & QUARTZ

Comment (Deposit): THE "RED HILL" PIPE MEASURED ONLY 8 X 10 FT AND ADIT CUT THE ORE PIPE AT 115 FT, 35 FT BELOW SURFACE. THE BODY WAS STOPED 25 FT ABOVE AND BELOW WHERE IT PINCHED OUT IN QTZITE. ONLY 400 T ON F. WAS MINED FROM THE RED HILL PIPE. THE RATTLESNAKE PIPE MEASURED 32 FT IN DIAMETER, STOPED 20 FT BELOW & TO THE SURFACE, AND PRODUCED 1,400 T. THE DELL PIPE MEASURED 45X40 FT BOTTOMED IN FISH HAVEN DOLO. & PRODUCED 14,000 T OF ORE. ; INFO.SRC : 3 FIELD OBSERV

References

Reference (Deposit): 1951 DIREXPL US AEC TEI-136

Reference (Deposit): COCHRAN, K.L., 1952, FLUORSPAR RESOURCES OF CALIF., NEV., UTAH, IDAHO, & COLORADO ADJACENT & TRIBUTARY TO FACILITIES OF THE UNION PACIFIC RR CO: UPRC, LOS ANGLES CALIF., 78 P.

Reference (Deposit): 1959 RECON STAATZ, USGS BULL. 1069

Reference (Deposit): 1964 RECON STAATZ, USGS PP 415

Reference (Deposit): 1979 GEOLMAP LINDSEY, D.A., USGS MAP-I-1176

Reference (Production): BULLOCK, 1976, STAATZ, 1964

Reference (Deposit): BULLOCK, K.C., 1976, FLUORITE OCCURRENCES IN UTAH: UTAH GEOL. & MINERAL SURVEY BULL. 110

Reference (Deposit): STAATZ, M.H., & OSTERWALD, F.W., 1959, GEOLOGY OF THE THOMAS RANGE FLUORSPAR DISTRICT, JUAB COUNTY: USGS BULL. 1069

Reference (Deposit): STAATZ, M.H., AND CARR, W.J., 1964, GEOLOGY AND MINERAL DEPOSITS OF THE THOMAS & DUGWAY RANGES, JUAB-TOOELE CO., UT: USGS PP 415

Reference (Deposit): STAATZ, M.H., AND WILMARTH, V.R., & BAUER, H.L., JR., 1951, RADIOACTIVE FLUORITE IN THE THOMAS RANGE, JUAB CO., UT: USGS TEI # 136, 88 P.

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