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O'Connell Mine

Past Producer in Santa Clara county in California, United States with commodity Chromium
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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. Ore body information
  12. Economic information about the deposit and operations
  13. Land status
  14. Ownership information
  15. Links to other databases
  16. Bibliographic references
  17. Reporter information

Geologic information

Identification information

Deposit ID 10103901
MRDS ID M100158
Record type Site
Current site name O'Connell Mine

Geographic coordinates

Geographic coordinates: -121.68908, 37.19686 (WGS84)
Elevation 201

Site location context

Political divisions (FIPS codes)

Santa Clara(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Morgan Hill(quadrangle 1:24,000 scale)

San Jose(quadrangle 1:100,000 scale)

San Jose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Coyote(hydrologic unit)

San Francisco Bay(hydrologic accounting unit)

San Francisco Bay(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Santa Clara

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 008S 003E 31 NW OF SE OF NW California

Comments on the location information

  • MINE IS APPROX. 2.8 MILES BY ROAD FROM U.S. 101

Commodities

Commodity Importance
Chromium Critical Primary

Materials information

Materials Type of material
Chromite Ore
Opal Gangue
Uvarovite Gangue

Alteration

  • (Local) Serpentinization Of Peridotites

Analytical data

Result ORE AVERAGED 44.67% CR2O3, 12.89% FE WITH CR/FE RATIO 2.37.

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite > Diabase
  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Peridotite > Dunite
    Rock unit name Santa Clara
    Rock description Santa Clara
  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Peridotite > Harzburgite
  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Pyroxenite

Nearby scientific data

(1) -121.68908, 37.19686
ListMap

Economic information

Ore body information

  • General form TABULAR
    Length 45M
    Width 0.2M

Comments on the geologic information

  • DEPOSIT OCCURS IN A NARROW ELONGATE UTRAMAFIC BODY, THAT FORMS A LOW RIDGE TRENDING NW AND FORMING THE EAST SLOPE OF THE SANTA CLARA VALLEY. THE BODY IS FAULT BOUND TO THE WEST AND EAST.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Year of first production 1953

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner Palo Alto Mining Co.
    First year 1953
    Last year 1955
  • Type Owner
    Owner Lake Anderson Corp., 777 N. First St., San Jose, Ca.
    First year 1976

Comments on the production information

  • MILLING-GRADE ORE. RESERVES LIMITED TO SOME OUTCROPS NEAR WORKINGS.

Comments on the workings information

  • WORKINGS CONSIST OF A BULLDOZER PIT 200 FT LONG, 50 FT. WIDE AND 20-30 FT. DEEP. 2000 FT SOUTH OF THIS PIT; ARE A SERIES OF BENCH CUTS IN THE HILLSIDE. OVERALL DIMENSION OF THESE CUTS IS 150 FT. LONG, 100 FT. WIDE AND 100 FT OF ELEVATION DIFFERENCE BETWEEN THE LOWEST AND HIGHEST BENCH.

Reference information

Bibliographic references

  • Deposit

    STINSON, M.C., 1976, CALIF. DIVISION OF MINES AND GEOLOGY MINERAL PROPERTY REPORT, UNPUBLISHED

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1981 Oster, Karel L. (Albers, John P.) 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.