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Jumbo Prospect

Occurrence 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. Nearby scientific data
  8. Geologic structures
  9. Ore body information
  10. Economic information about the deposit and operations
  11. Ownership information
  12. Links to other databases
  13. Bibliographic references
  14. Reporter information

Geologic information

Identification information

Deposit ID 10027968
MRDS ID M004666
Record type Site
Current site name Jumbo Prospect
Related records 10162873

Geographic coordinates

Geographic coordinates: -121.60714, 37.59269 (WGS84)
Elevation 732
Relative position ABOUT 1000 FT. FROM ARROYO MACHO ROAD, 13.5 MI. S. OF LIVERMORE.

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 NE 1/4 NE 1/4 SECTION 14

Commodities

Commodity Importance
Manganese Critical Tertiary

Nearby scientific data

(1) -121.60714, 37.59269
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Ore Bodies In A Lens Of Massive Folded Into An Anticline Which Pitches To The South And The Main Body Of The Lens Lies On The Sw Limb Of The Fold Dipping 25 Degrees To The West.

Ore body information

  • Thickness 1.83M

Comments on the geologic information

  • GEOL.DESC: MAIN ORE BODY CONSISTS LARGELY OF MASSIVE GREY CHERT WITH POCKETS AND BANDS OF MANGANESE OXIDE; ANOTHER BODY OF GREEN MASSIVE CHERT 3 FT. THICK, STAINED WITH MANGANESE LIES WITHIN BEDDED CHERT AND SHALE; ANOTHER BODY OF VERY SILICEOUS ORE.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Ownership information

  • Type Owner
    Owner Leslie Holm
    First year 1950

Comments on the production information

  • NO PRODUCTION

Comments on the workings information

  • SMALL OPEN CUTS , 10-FT. DRIFT ON MAIN BODY, TUNNEL ON SECOND, AND SMALL TRENCH ON LAST BODY MENTIONED

Reference information

Bibliographic references

  • Deposit

    CALIF. JOUR. MINES & GEOL. V. 46, NO. 2, APRIL 1950, P. 344, PL. 58

  • Deposit

    DOM BULL. 125, P.100

  • Deposit

    BULL. 152, P.21-22

  • Deposit

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

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.