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Jones Group

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. Reporter information

Geologic information

Identification information

Deposit ID 10111040
MRDS ID W025096
Record type Site
Current site name Jones Group
Related records 10262687

Geographic coordinates

Geographic coordinates: -121.41713, 37.38853 (WGS84)
Elevation 829
Relative position 30 MI. BY ROAD W. OF RAILROAD AT PATTERSON

Site location context

Political divisions (FIPS codes)

Santa Clara(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Mount Boardman(quadrangle 1:24,000 scale)

San Jose(quadrangle 1:100,000 scale)

San Jose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

San Francisco Bay(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 006S 005E 27 California

Comments on the location information

  • LOCATED IN NW 1/4 SECTION 27 , GROUP CONSISTS OF 5 DEPOSITS.

Commodities

Commodity Importance
Manganese Critical Primary

Materials information

Materials Type of material
Rhodochrosite Ore

Analytical data

Result AVERAGE GRADE 35 TO 45 PERCENT MANGANESE

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Chemical Sediment > Chert
    Stratigraphic age (youngest) Late Cretaceous

Nearby scientific data

(1) -121.41713, 37.38853
ListMap

Economic information

Ore body information

  • Thickness 1.52M
    Length 94.49M
    Depth to bottom 35.05M

Comments on the geologic information

  • ORE HOSTED IN FRANCISCAN COMPLEX--L. TO L. ; GEOL.DESC: ORE OCCURS IN MASSIVE WHITE CHERT INTERBEDDED IN THIN-BEDDED RED CHERT AND SHALE, FOUND IN A ZONE 250 FT. THICK, SURROUNDED BY SANDSTONE. GENERAL STRIKE IS N.W., DIPPING 50 TO 80 S.W. MINOR FOLDS AND FAULTS ARE PRESENT. 3 TYPES OF ORE OCCUR; IN DEPOSIT I ARE HIGH GRADE MASSIVE BLACK OXIDE BEDS 3 TO 5 FT. THICK, WHICH GRADE IN RHODOCHROSITE AT A DEPTH OF ABOUT 50 FT. THE OTHER DEPOSITS CONTAIN LOW GRADE SILICEOUS BLACK OXIDE.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Large
Significant No

Land status

Ownership category Private

Reference information

Bibliographic references

  • Deposit

    CALIF. BUREAU OF MINES AND GEO. V. 50 , NO. 2 APR. 1954 , P. 413

  • Deposit

    D.O.M. BULL. 152 1950 PP. 251 - 253

  • Deposit

    D.O.M. BULL. 125 1943 P. 177

  • Deposit

    U.S.B.M. R.I. 5254

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-1978 Killman, K.; Albers, 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.