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Pratt Mine

Past Producer in Juab county in Utah, United States with commodities Manganese, Gold, Silver, Sulfur, Arsenic, Zinc
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Alteration
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Land status
  17. Ownership information
  18. Production statistics
  19. Workings at the site
  20. Links to other databases
  21. Bibliographic references
  22. General comments
  23. Reporter information

Geologic information

Identification information

Deposit ID 10020439
MRDS ID DC13232
Record type Site
Current site name Pratt Mine
Alternate or previous names Black Boy #5
Related records 10275747

Geographic coordinates

Geographic coordinates: -113.03414, 39.56912 (WGS84)
Elevation 1829
Relative position ONE MILE NE OF LADY LAIRD PEAK

Site location context

Political divisions (FIPS codes)

Juab(county)

Utah(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Lady Laird Peak(quadrangle 1:24,000 scale)

Fish Springs(quadrangle 1:100,000 scale)

Delta(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower Sevier(hydrologic unit)

Escalante Desert-Sevier Lake(hydrologic accounting unit)

Escalante Desert-Sevier Lake(hydrologic subregion)

Great Basin(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management UT)

Bureau of Land Management UT BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States Utah Juab

Public Land Survey System information

Meridian Township Range Section Fraction State
Salt Lake 014S 011W 25 Utah

Comments on the location information

  • SECTION SUBDIVISIONS NE 1/4 SE 1/4 SW 1/4

Commodities

Commodity Importance
Manganese Critical Primary
Gold Tertiary
Silver Tertiary
Sulfur Tertiary
Arsenic Critical Tertiary
Zinc Critical Tertiary

Comments on the commodity information

  • THIS DEPOSIT SHARES WITH THOSE AT PHILIPSBURG, MONT. AND BATESVILLE, ARK., THE DISTINCTION OF BEING ONE OF THE FEW EXAMPLES OF REPLACEMENT OF CARBONATE ROCKS BY RHODOCHROSITE.

Materials information

Materials Type of material
Pyrolusite Ore
Barite Gangue
Muscovite Gangue
Pyrite Gangue
Sericite Gangue
Sphalerite Gangue

Alteration

  • (Local) Oxidation To Depths Of 300 Ft.

Analytical data

Result 1933 ANALYSIS OF RHODOCRHOSITES: MNO 40.53-47.90%, MNCO3 65.65-77.65%

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Latite
    Rock unit name Volcanic Flows And Dikes
    Rock description Volcanic Flows And Dikes
    Stratigraphic age (youngest) Late Cambrian
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Dolomite
    Rock unit name Dolomite, Ls, Shale (Dugway Ridge Dolomit);Prospect Mountain Quartzite
    Rock description Dolomite, Ls, Shale (Dugway Ridge Dolomit);Prospect Mountain Quartzite

Nearby scientific data

(1) -113.03414, 39.56912
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description The Drum Mtns Form A Homocline That Dips Sw Under A Cover Of Volcanic Rocks. Regional Strike N 35 W At 25 Sw
Type of structure Local
Structure description A N 75 Deg E Trending Fault Which Displaces Quartzite-Dolomite Contact About 1500 Feet

Ore body information

  • General form LENTICULAR
    Strike N 35 DEG W
    Dip 33 SW
    Thickness 7.62M
    Length 243.84M
    Width 21.34M
    Depth to top 30.48M
    Depth to bottom 60.96M

Controls for ore emplacement

  • The Contact Zone Between Quartzite And Dolomite

Economic information about the deposit and operations

Development status Past Producer
Commodity type Both
Deposit size Medium
Significant No
Discovery year 1924
Discoverer Fred Staatz
Year of first production 1924

Mining district

District name Detroit

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner Ward Leasing Co.
    Home office Salt Lake City, Ut.
    First year 1941
    Last year 1945
  • Type Owner
    Owner Pratt (Estate)

Production statistics

  • Year 1925
    Period 1924-1925
    Accuracy Accurate
    Description Cp_Grade: ^10-35% Mn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Manganese Manganese 23wt-pct
  • Year 1928
    Accuracy Accurate
    Description Ap_Grade: ^10-35% Mn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Manganese Manganese 23wt-pct
  • Year 1929
    Accuracy Accurate
    Description Ap_Grade: ^4.124 Tons 10-35%, 47 T Greater Than 35% Mn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Manganese Manganese 35wt-pct
  • Year 1930
    Accuracy Accurate
    Description Ap_Grade: ^10-35% Mn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Manganese Manganese 23wt-pct
  • Year 1936
    Accuracy Accurate
    Description Ap_Grade: ^1,312 T 10-35%, 1,635 T Greater Than 35% Mn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Manganese Manganese 35wt-pct
  • Year 1937
    Accuracy Accurate
    Description Ap_Grade: ^1,375 T 10-35%, 30t Greater Than 35% Mn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Manganese Manganese 35wt-pct
  • Year 1937
    Period 1924-1937
    Accuracy Accurate
    Description Cp_Grade: ^10-35% Mn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Manganese Manganese 23wt-pct
  • Year 1944
    Accuracy Accurate
    Description Ap_Grade: ^Ave. 20.38% Mn, High 28.8, Low 13.60
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Manganese Manganese 20wt-pct
  • Year 1945
    Period 1942-1945
    Accuracy Accurate
    Description Cp_Grade: ^36.6% Mn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Manganese Manganese 37wt-pct

Comments on the production information

  • FROM A BATCH OF 505 LONG TONS OF ORE (1944) AVE. 36.60% MN, HIGH 42.01, LOW 35.855, FE 5.40%, SIO2 17.33%, AL2O3 4.93%, H2O 5.96%, INSOL. 0.002%

Comments on the reserve resource information

  • USBM HOLE #101 (1945) PENETRATED 8 FT OF ORE AVE .25% MN, IN ADDITION THERE IS INFERRED TO BE A FEW THOUSAND TONS OF ORE (15-20% MN) IS THE LOWER EDGE OF THE #6 ORE BODY
  • THE OUTLOOK FOR FUTURE DISCOVERIES (LARGE) IS NOT BRIGHT. DRILLING IN 1941 EXPLORED THE LARGER FAULTED SEGMENTS FROM THE STAATZ FAULT-TO THE PRINCE SHAFT (PRATT MINE) WITH MOST HOLES CUTTING NO ORE

Workings at the site

  • Type of workings Underground
    Area 0.056HA
    Length 853.44M
    Overall depth 60.96M
    Overall length 243.84M
    Overall width 243.84M

Comments on the workings information

  • SHAFT (#6 INCLINE) 165 FEET AT 45 DEG.

Comments on development

  • THE BLACK BOY CLAIMS CONSIST OF WORKINGS IN 2 AREAS ABOUT 1/4 MILE APART, THE NORTHERN MOST AREA IS CALLED THE PRATT MINE AND INCLUDES WORKINGS IN THE AREA OF THE PRATT FAULT. 14 DIAMOND DRILL HOLES TOTALING 3,195 FT WERE DRILLED BY USBM IN 1940, AND 6 MORE HOLES (1926 FEET) IN 1945

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit IN THE HANGING WALL OF THE FAULT ZONE THERE ARE 3 LENTICULAR ORE BODIES WHICH PARALLEL THE BEDDING. THE DIMENSIONS ON THE LARGEST BODY ARE DESCRIBED ABOVE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1974 Unknown U.S. Geological Survey
Updater 01-MAR-1980 Everts, Mike L. U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

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