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Feldman and Winkelman Gypsum Pits

Producer in Pinal county in Arizona, United States with commodities Gypsum-Anhydrite, Diatomite
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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. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Ore body information
  12. Economic information about the deposit and operations
  13. Ownership information
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10060185
MRDS ID TC10142
Record type Site
Current site name Feldman and Winkelman Gypsum Pits
Alternate or previous names National Gypsum
Related records 10210233

Geographic coordinates

Geographic coordinates: -110.6929, 32.87843 (WGS84)
Relative position E SIDE OF SAN PEDRO VALLEY, ABOUT 6 MILES S OF WINKELMAN.

Site location context

Political divisions (FIPS codes)

Pinal(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Dudleyville(quadrangle 1:24,000 scale)

Mammoth(quadrangle 1:100,000 scale)

Tucson(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower San Pedro(hydrologic unit)

San Pedro-Willcox(hydrologic accounting unit)

Middle Gila(hydrologic subregion)

Lower Colorado(hydrologic region)

Geographic areas

Country State County
United States Arizona Pinal

Public Land Survey System information

Meridian Township Range Section Fraction State
Gila and Salt River 006S 016E 26,27 Arizona

Commodities

Commodity Importance
Gypsum-Anhydrite Primary
Diatomite Tertiary

Materials information

Materials Type of material
Diatomite Ore
Gypsum Ore
Clay Gangue

Analytical data

Result WHITE TO GREYISH WHITE, GRANULAR TO MICROCRYSTALLINE GYPSUM BEDS. MOSTLY +90% GYPSUM

Mineral occurrence model information

Model code 261
USGS model code 35b.4 (35b.9)
Deposit model name Lacustrine gypsum

Host and associated rocks

  • Host or associated Host
    Rock type Unconsolidated Deposit > Clay, Mud
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Unconsolidated Deposit > Silt
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Shale
    Rock unit name Gila Conglomerate
    Rock description Gila Conglomerate
  • Host or associated Host
    Rock type Sedimentary Rock > Diatomite

Nearby scientific data

(1) -110.6929, 32.87843
ListMap

Economic information

Ore body information

  • Dip 3E
    Thickness 2.44M

Comments on the geologic information

  • SHALE IS CALCAREOUS TO GYPSIFEROUS. LACUSTRINE BASIN OCCUPIES AT LEAST 18 SQ MILES, PRINCIPALLY ALONG THE EAST SIDE OF THE SAN PEDRO RIVER, AND DIPS ABOUT 3 DEGREES EAST. AN EXPLORATION HOLE DRILLED TO EVALUATE ONE OF THE DEPOSITS INTERSECTED A CONTINUOUS 300 FT THICKNESS OF INTERBEDDED CLAY AND GYPSUM, AND CORRELATION WITH OTHER DRILL HOLES SUGGESTS THAT THE SECTION OF CLAY AND GYPSUM MAY BE MORE THAN 595 FT THICK. ARAVAIPA CREEK BISECTS THE DEPOSIT. NORTH OF THE CREEK, MASSIVE GYPSUM WITH CLAY PARTINGS (30-50 FT THICK) IS BEING MINED BY NATIONAL GYPSUM CO. AND THE SUPERIOR COMPANIES.

Economic information about the deposit and operations

Development status Producer
Commodity type Non-metallic
Deposit size Large
Significant No

Ownership information

  • Type Operator
    Owner National Gypsum And The Superior Companies

Comments on the reserve resource information

  • RESERVES AND RESOURCES NOT ESTIMATED BUT PROBABLY IN MULTIMILLION-TON RANGE.

Comments on development

  • ECON.COM: THE GYPSUM ORE IS DIRLLED AND BLASTED; THEN THE BROKEN GYPSUM IS LOADED AND HAULED TO CRUSHING PLANTS WHERE THE MINUS 3/8 INCH FRACTION IS SCREENED OFF. THE FINAL PRODUCT CONTINS 92% GYPSUM AND LESS THAN 4% INSOLUBLES.

Reference information

Bibliographic references

  • Deposit

    KEITH, S.B., 1969, GYPSUM, IN USGS, AZ BUREAU OF MINES, AND U.S. BUREAU OF RECLAMATION, MINERAL AND WATER RESOURCES OF ARIZONA: ARIZONA BUREAU OF MINES BULLETIN 180, 638 P.

  • Deposit

    PHILLIPS, K.A., 1987, INDUSTRIAL MINERALS OF ARIZONA: ARIZONA DEPARTMENT OF MINES AND MINERAL RESOURCES, 185 P.

  • Deposit

    BLAKE, W.P., 1904, GYPSUM DEPOSITS OF ARIZONA: U.S. GEOLOGICAL SURVEY BULLETIN 223, 129 P.

  • Deposit

    STONE, R.W., 1920, GYPSUM DEPOSITS OF THE UNITED STATES: U.S. GEOLOGICAL SURVEY BULLETIN 697, 326 P.

  • Deposit

    PEIRCE, H.W., 1990, ARIZONA GEOLOGICAL SURVEY INDUSTRIAL MINERALS CARD FILE.

  • Deposit

    EYDE, TED, WILKINSON, P.A.K., AND WEILAND, E.F., 1986, FIELD TRIP TO SELECTED INDUSTRIAL MINERAL DEPOSITS OF ARIZONA, IN BEATTY, BARBARA, AND WILKINSON, P.A.K., EDS., FRONTIERS IN GEOLOGY AND ORE DEPOSITS OF ARIZONA AND THE SOUTHWEST: ARIZONA GEOLOGICAL SOCIETY DIGEST, V. XVI, P. 312-318.

  • Other Database

    CIMRI

  • Reserve-Resource

    AZ BUREAU OF MINES BULLETIN 180, P.375.

General comments

Subject category Comment text
Deposit MAY BE AREALLY EXTENSIVE. EXPOSED NEAR SURFACE WHERE MINED, BUT BURIED TO S AND E AND ERODED AWAY TO W AND N EXCEPT IN ISOLATED RESUAL HILLS. DIATOMITE OCCURS AS INTERBEDS IN THE GYPSUM. IN THIS AREA, A ZONE AT LEAST 100 FT THICK CONTAINS THICK (1-8 FT), MASSIVE, WHITE TO GRAYSIH WHITE, GRANULAR TO MICROCRYSTALLINE, FLAT-LYING GYPSUM BEDS. THE GYPSUM BEDS ARE SEPARATED BY THIN LAYERS OF CALCAREOUS AND GYPSIFEROUS SHALE AND SILT.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-1989 Bolm, Karen S. U.S. Geological Survey
Updater 01-SEP-1992 Orris, Greta J. U.S. Geological Survey
Updater 20-SEP-1994 Orris, Greta J. U.S. Geological Survey

Beyond USGS

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

Maps centered on this site

Authoritative Arizona resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.