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New Idria

Producer in San Benito county in California, United States with commodity Asbestos
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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. Alteration
  8. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Economic information about the deposit and operations
  13. Mining district
  14. Land status
  15. Ownership information
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10080649
MRDS ID W031982
Record type Site
Current site name New Idria
Alternate or previous names Santa Rita

Geographic coordinates

Geographic coordinates: -120.72877, 36.40105 (WGS84)
Relative position 140 MI. SE OF SAN FRANCISCO IN THE SOUTHERN PART OF THE DIABLO RANGE, ON THE JOAQUIN RIDGE NEAR COALINGA.

Site location context

Political divisions (FIPS codes)

San Benito(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Idria(quadrangle 1:24,000 scale)

Coalinga(quadrangle 1:100,000 scale)

Monterey(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Panoche-San Luis Reservoir(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management CA)

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

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States California San Benito

Commodities

Commodity Importance
Asbestos Primary

Comments on the commodity information

  • FIBER IS SHORT, BUT SUPERIOR TO CANADIAN SHORT FIBER IN WHITENESS AND ABILITY TO ABSORB HYDROCARBONS (RICE, 1966).

Materials information

Materials Type of material
Chrysotile Ore

Alteration

  • (Local) Oxidation Of Upper 15 To 20 Ft. Of Deposit. Much Serpentine Is Recrystallized To Flaky, Matted Chrysotile.

Analytical data

Result CHRYSOTILE CONTENT EXCEEDS 50% IN PLACES.

Host and associated rocks

  • Host or associated Associated
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Shale
    Stratigraphic age (youngest) Late Jurassic
  • Host or associated Associated
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone
    Rock unit name Franciscan Complex;Panoche Formation
    Rock description Franciscan Complex;Panoche Formation
  • Host or associated Host
    Rock type Metamorphic Rock > Serpentinite
    Rock unit name Franciscan Sandstone;Panoche Shale And Sandstone
    Rock description Franciscan Sandstone;Panoche Shale And Sandstone

Nearby scientific data

(1) -120.72877, 36.40105
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Northwest-Trending Coalinga Anticline
Type of structure Local
Structure description New Idria Thrust Fault. Deposit Highly Sheared

Ore body information

  • General form IRREGULAR
    Length 22530.2M
    Width 6437.2M

Comments on the geologic information

  • JUR. FRANCISCAN SANDSTONE AND CRET. PANOCHE SHALE AND SANDSTONE ARE ASSOCIATED ROCKS.

Economic information about the deposit and operations

Development status Producer
Commodity type Non-metallic
Deposit size Large
Significant No
Discovery year 1957
Discoverer Union Carbide Corporation Discovered Asbestos While Searching For Nickel-Chrome Ores.

Mining district

District name New Idria

Land status

Ownership category Federal

Ownership information

  • Type Owner
    Owner Union Carbide Nuclear Co.
    First year 1966

Comments on the workings information

  • OPEN PIT MINE

Reference information

Bibliographic references

  • Deposit

    LINN,R.K., 1968, NEW IDRIA MINING DISTRICT -IN- ORE DEPOSITS OF THE UNITED STATES 1933-1967 (GRATEN-SALES VOLUME). NEW YORK: AM. INST OF MNG., MET., AND PET. ENG., INC., PP. 1623-49.

  • Deposit

    RICE,S.J., 1966, CAL. DIV. OF MINES AND GEOL. BULL. 191, PP 86-92.

General comments

Subject category Comment text
Deposit RESERVES ARE ABOUT 100 MILLION TONS OF ORE

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-1981 Zigler, Jan L. (Huber, Donald F.) 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.