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  3. Mineral Resource Data System (MRDS)

Section 14

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. 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. Ownership information
  14. Links to other databases
  15. Bibliographic references
  16. Reporter information

Geologic information

Identification information

Deposit ID 10027978
MRDS ID M004679
Record type Site
Current site name Section 14
Related records 10259770

Geographic coordinates

Geographic coordinates: -121.61825, 37.50158 (WGS84)
Relative position ON S. SLOPE OF MAN RIDGE, 5.8 MI. BY ROAD FROM THE ARROYO MACHO ROAD AND 28 MILES SOUTH 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 005S 003E 14 California

Commodities

Commodity Importance
Manganese Critical Primary

Materials information

Materials Type of material
Rhodochrosite Ore

Analytical data

Result AVG. GRADE BETTER THAN 45 % MANGANES

Host and associated rocks

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

Nearby scientific data

(1) -121.61825, 37.50158
ListMap

Economic information

Ore body information

  • Strike N 60 W
    Dip STEEPLY NE
    Thickness 1.22M
    Depth to bottom 12.19M

Comments on the geologic information

  • ORE HOSTED IN FRANCISCAN COMPLEX - L. TO L. ; GEOL.DESC: BED OF MANGANESE OXIDES, THICKNESS OF 4 FT. WAS MORE OR LESS CONTINUOUS TO A DEPTH OF AT LEAST 40 FT. HANGING WALL APPARENTLY A FAULT WITH SANDSTONE BROUGHT AGAINST ORE; FOOTWALL IS WHITE CHERT. SOME RHODOCHROSITE WAS MINED. CARBONATE ORE IS MORE OR LESS COMPLETELY OXIDIZED.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Medium
Significant No

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner Phil Winegar
    First year 1942
  • Type Owner
    Owner Lee Ogier

Comments on the production information

  • MINE WORKED FOR A SHORT TIME IN 1918 AND 700 TONS OF ORE SAID TO HAVE BEEN SHIPPED, THE GRADE AVERAGING BETTER THAN 45 % MANGANESE. MOST OF THE ORE VISIBLE IN 1942 CONTAINED ABOUT 25% MANGANESE BUT A SMALL AMOUNT WAS ESTIMATED AT 45%.

Comments on the workings information

  • TUNNEL (NOW CAVED), 15 FT. SHAFT NEAR PORTAL

Reference information

Bibliographic references

  • Deposit

    CALIF. JOUR. MINES & GEOL. V. 46, NO.2, P.340, PL. 58

  • Deposit

    DOM BULL. 125, P.101

  • Deposit

    BULL. 152, P.26

  • Deposit

    BULL. 140 , P. 66 , PL. 1

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.