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Black Jack

Producer in Alameda 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. Host and associated rocks
  8. Nearby scientific data
  9. Ore body information
  10. Economic information about the deposit and operations
  11. Land status
  12. Ownership information
  13. Links to other databases
  14. Bibliographic references
  15. Reporter information

Geologic information

Identification information

Deposit ID 10109080
MRDS ID M004665
Record type Site
Current site name Black Jack
Related records 10211101

Geographic coordinates

Geographic coordinates: -121.61214, 37.59241 (WGS84)
Elevation 695

Site location context

Political divisions (FIPS codes)

Alameda(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Cedar Mountain(quadrangle 1:24,000 scale)

Stockton(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 Alameda

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 004S 003E 14 California

Comments on the location information

  • LOCATED IN NW 1/4 NE 1/4 SECTION 14

Commodities

Commodity Importance
Manganese Critical Primary

Host and associated rocks

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

Nearby scientific data

(1) -121.61214, 37.59241
ListMap

Economic information

Ore body information

  • Strike N 25 E TO N 20 W
    Dip 25 TO 55 W
    Thickness 1.22M

Comments on the geologic information

  • GEOL.DESC: ORE BODY IS IN A BED OF MASSIVE GREY CHERT, WITH IRREGULAR POCKETS OF SILICEOUS OXIDE ORE. THE CHERT AND THE ORE ARE CUT BY NUMEROUS VEINS OF QUARTZ. THE ORE BODY LIES PARALLEL TO BEDDING OF ENCLOSING RADIOLARIN CHERTS AND SHALES.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant No

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Leslie Holm
    First year 1950

Comments on the production information

  • PAST PRODUCTION IS 40 TONS. MINE LIES 750 FT. FROM THE ARROYO MOCHO ROAD. THE ORE BODY RANGES IN THICKNESS FROM 1.7 TO 4 FT. AND AVERAGES 2.5 FT. IT LIES PARALLEL TO THE BEDDING OF THE ENCLOSING GRAY RADIOLARIAN CHERT AND SHALE. THE STRIKE RANGES FROM N. 25 DEG. E. TO N. 20 DEG. W. AND THE DIP FROM 25 DEG. TO 55 DEG. W

Comments on the workings information

  • DRIFT 60 FT. TO ORE BODY, CONTINUES 30 FT.FARTHER FOLLOWING ORE BODY ALONG A COURSE N.20 DEG W,RAISE 8 FT., SECOND DRIFT FOLLOWS ORE BODY ALONG A COURSE N. 10 DEG. W FOR 40 FT.

Reference information

Bibliographic references

  • Deposit

    CALIF. JOUR. MINES & GEOL. V. 46, NO.2, APRIL, 1950, P.343, PL. 58

  • Deposit

    DOM BULL. 125, P.97

  • Deposit

    BULL. 152, P.16

  • Deposit

    BULL 140 , P. 66 , PL. 1 (GEOLOGY)

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1972 Gere, W. U.S. Geological Survey
Updater 01-APR-1977 Von Dohlen, E.; 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.