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Pacific Mine

Past Producer in San Bernardino county in California, United States with commodities Boron-Borates, Strontium, Gypsum-Anhydrite
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Host and associated rocks
  8. Nearby scientific data
  9. Geologic structures
  10. Ore body information
  11. Economic information about the deposit and operations
  12. Mining district
  13. Ownership information
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10102220
MRDS ID I003023
Record type Site
Current site name Pacific Mine
Alternate or previous names Borate, Old Borate, Calico
Related records 10116202

Geographic coordinates

Geographic coordinates: -116.81754, 34.95001 (WGS84)
Relative position ABOUT 11-12 MILES N OF DAGGETT.

Site location context

Political divisions (FIPS codes)

San Bernardino(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Yermo(quadrangle 1:24,000 scale)

Newberry Springs(quadrangle 1:100,000 scale)

San Bernardino(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Mojave(hydrologic unit)

Northern Mojave(hydrologic accounting unit)

Northern Mojave-Mono Lake(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California San Bernardino

Commodities

Commodity Importance
Boron-Borates Primary
Strontium Tertiary
Gypsum-Anhydrite Tertiary

Materials information

Materials Type of material
Colemanite Ore
Calcite Gangue
Celestite Gangue
Gypsum Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Pyroclastic Rock > Volcanic Breccia (Agglomerate)
    Stratigraphic age (youngest) Miocene
    Stratigraphic age (youngest) Miocene
    Stratigraphic age (youngest) Miocene
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Shale
    Rock unit name Barstow Formation
    Rock description Barstow Formation
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone

Nearby scientific data

(1) -116.81754, 34.95001
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Numerous Faults, Sediments Are "Severely Folded"

Ore body information

  • Thickness 9.14M

Comments on the geologic information

  • BELT OF BORATE WORKINGS EXTENDS 2.4 KM.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Non-metallic
Significant No
Discovery year 1882
Year of first production 1884
Production years 1884-1907

Mining district

District name Calico-Daggett Borate Area

Ownership information

  • Type Owner
    Owner Pacific Coast Borax Co.
    First year 1907

Comments on the workings information

  • MANY OF THE NEAR SURFACE TOPES HAVE COLLAPSED. THE DUMPS ARE 18-21 M HIGH AND SEVERAL HUNDRED METERS WIDE. AT ONE POINT, MINING EXTENDED TO A DEPTH OF 500-600 FT.

Reference information

Bibliographic references

  • Deposit

    CAMPBELL, M.R., 1902, RECONNAISSANCE OF THE BORAX DEPOSITS OF DEATH VALLEY AND MOHAVE DESERT: U.S. GEOLOGICAL SURVEY BULLETIN 200, 23 P.

  • Deposit

    PIPER, J.R., 1985, BORATE DEPOSITS OF THE CLAICO-DAGGETT AREA, CALIFORNIA, IN BARKER, J.M., AND LEFOND, S.J., EDS., BORATES: ECONOMIC GEOLOGY AND PRODUCTION: NEW YORK, SOCIETY OF MINING ENGINEERS OF THE AMERICAN INSTITUTE OF MINING, METALLURGICAL, AND PETROLEUM ENGINEERS, INC., P. 147-155.

  • Deposit

    RAPP, J.S., AND VREDENBURGH, L.M., 1992, INDUSTRIAL MINERAL RESOURCE POTENTIAL OF TERTIARY PLAYA DEPOSITS OF THE FORT IRWIN AREA, SAN BERNARDINO COUNTY, CALIFORNIA: SOCIETY FOR MINING, METALLURGY, AND EXPLORATION, INC. PREPRINT NUMBER 92-44, 9 P.

  • Deposit

    LYDAY, P.A., 1992, HISTORY OF BORON PRODUCTION AND PROCESSING: INDUSTRIAL MINERALS, NO. 303, P. 19-37.

  • Deposit

    VER PLANCK, W.E., 1956, HISTORY OF BORAX PRODUCTION IN THE UNITED STATES: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 52, NO. 3, P. 273-191.

  • Deposit

    YALE, C.G., 1904, BORAX, IN MINERAL RESOURCES OF THE US - 1903: WASHINGTON, D.C., U.S. GEOLOGICAL SURVEY, P. 1017-1028.

General comments

Subject category Comment text
Deposit BORATES OCCUR AS PODIFORM AND STRATIFORM DEPOSITS--THE PODS OCCURRING BELOW THE BEDDED DEPOSITS. FIVE BORATE BEDS ARE EXPOSED AT THE SURFACE AND RANGE FROM 0.6 TO 4.6 M IN THICKNESS. THE STRATIFORM AND PODIFORM BORATES ARE SEPARATED BY 15.2 M OF BORON-RICH SHALE. NEAR THE SURFACE, COLEMANITE HAS COMMONLY BEEN REPLACED BY CALCITE.
Deposit THIS MINE WAS THE FIRST UNDERGROUND MINING OF COLEMANITE IN THE UNITED STATES.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-1992 Orris, Greta J. U.S. Geological Survey
Updater 01-NOV-1993 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 California resources

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