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Mahoney

Producer in San Joaquin 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. Links to other databases
  13. Bibliographic references
  14. Reporter information

Geologic information

Identification information

Deposit ID 10033552
MRDS ID M020146
Record type Site
Current site name Mahoney
Alternate or previous names Doak, Johnson Lease
Related records 10116352

Geographic coordinates

Geographic coordinates: -121.49796, 37.59935 (WGS84)
Relative position AT THE CREST OF THE RIDGE ACROSS THE CANYON S. E. OF THE LADD MINE.

Site location context

Political divisions (FIPS codes)

San Joaquin(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Lone Tree Creek(quadrangle 1:24,000 scale)

Stockton(quadrangle 1:100,000 scale)

San Jose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

San Joaquin Delta(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California San Joaquin

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 004S 004E 11 California

Comments on the location information

  • LOCATED IN NE 1/4 SECTION 11 , UTM APPROX

Commodities

Commodity Importance
Manganese Critical Primary

Materials information

Materials Type of material
Psilomelane Ore

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
    Stratigraphic age (youngest) Late Cretaceous

Nearby scientific data

(1) -121.49796, 37.59935
ListMap

Economic information

Ore body information

  • Strike N 35 W
    Dip STEEP
    Thickness 3.05M
    Length 18.29M

Comments on the geologic information

  • ORE HOSTED IN FRANCISCAN COMPLEX--L. TO L. ; GEOL.DESC: ORE BODIES ARE NEAR THE BASE OF A THICK LENS OF FRANCISCAN CHERT IN APPROXIMATELY THE SAME STRATIGRAPHIC HORIZON AS THE LADD MINE. THE BODIES ARE 25 FT. APART, STRIKE N 35 W, AND DIP STEEPLY. THE NO. 2 ORE BED IS MANGANESE OXIDE IN A SILICEOUS MATRIX, WITH LESS THAN 10 PERCENT MANGANESE. THE NO. 1 ORE BED IS OVER 60 FT. LONG, 8 TO 10 FT. THICK AND EXTENDS 30 FT. UP AND DOWN DIP. THIS BED CONTAINS HIGH GRADE ORE. THE ORE MATERIAL PRESENT IS CELLULAR CHERT VEINED AND PARTLY REPLACED BY MANGANESE OXIDES. THE LOWER ORE BODY IS OFFSET VERTICALLY BY AT LEAST 3 FAULTS WHICH STRIKE N. W.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Large
Significant No

Reference information

Bibliographic references

  • Deposit

    D.O.M. BULL. 152 1950 PP. 226 - 22

  • Deposit

    D.O.M. BULL. 125 1943 P. 167

  • Deposit

    TRASK, PARKER. NOTES ON THE MANGANESE RESOURCES OF CALIF., 1944 , UNPUB.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-DEC-1977 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.