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Pine Ridge

Producer in Santa Clara county in California, United States with commodity Manganese
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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. Host and associated rocks
  9. Nearby scientific data
  10. Ore body information
  11. Economic information about the deposit and operations
  12. Land status
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10077455
MRDS ID W025102
Record type Site
Current site name Pine Ridge
Related records 10237935

Geographic coordinates

Geographic coordinates: -121.56574, 37.20409 (WGS84)
Elevation 475
Relative position 12 MI. N.E. OF MORGAN HILL, ON THE CREST OF A LOW KNOB ON PINE RIDGE.

Site location context

Political divisions (FIPS codes)

Santa Clara(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Mount Sizer(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 004E 31 California

Commodities

Commodity Importance
Manganese Critical Primary

Materials information

Materials Type of material
Psilomelane Ore

Analytical data

Result AVERAGE GRADE 35 PERCENT MANGANESE

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Chemical Sediment > Chert
    Rock unit name Franciscan Complex
    Rock description Franciscan Complex
    Stratigraphic age (youngest) Late Cretaceous

Nearby scientific data

(1) -121.56574, 37.20409
ListMap

Economic information

Ore body information

  • Thickness 2.44M
    Length 53.34M

Comments on the geologic information

  • ORE HOSTED IN FRANCISCAN COMPLEX--L. TO L.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Medium
Significant No

Land status

Ownership category Private

Reference information

Bibliographic references

  • Deposit

    CALIF. JOUR. MINES AND GEO., V. 50 , NO. 2 , APR. 1954 , P. 415

  • Deposit

    D.O.M. BULL. 152 1950 PP. 258 - 262

  • Deposit

    CDMG BASIN PLANNING AREA 3 ( 1972 )

General comments

Subject category Comment text
Deposit BEDS OF MANGANESE OXIDE ORE IN BUFF, RED, WHITE, AND BROWN SHALY CHERT. ORE OCCURS AS HEAVY STOCKWORK ORE WITH SPONGY RED CLAY CORES, OXIDE VEINS AND POCKETS, WORMY ORE WITH CORES OF LEECHED CHERT, AND WAD. SOME PSILOMELANE IS PRESENT, AND SILICEOUS MANGANESE OXIDES. A SIMILAR DEPOSIT IS ONE MI. W. OF THE MAIN MINE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-1978 Killman, K.; Albers, J. U.S. Geological Survey UNIT NAME DELETED FROM HOST ROCK FIELD, UNIT NAME AND AGE ENTERED, HOST ROCK ENTERED.
Updater 01-OCT-1993 Mosier, Dan U.S. Geological Survey REPLACED LOST LOCATION.
Updater 13-NOV-1997 Oland, G. P. (Orris, Greta J.) U.S. Geological Survey OLAND AND ORRIS MERGED RECORDS
Editor 08-MAY-1998 Mason, George 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.