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Ladd Mine

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 10033551
MRDS ID M020145
Record type Site
Current site name Ladd Mine
Alternate or previous names Carral Hollow

Geographic coordinates

Geographic coordinates: -121.49685, 37.60658 (WGS84)
Relative position 13 MI. BY ROAD S. OF TRACY

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 02,11 California

Commodities

Commodity Importance
Manganese Critical Primary

Materials information

Materials Type of material
Bementite Ore

Analytical data

Result AVERAGE 18 PERCENT MANGANESE UNSORTED

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) -121.49685, 37.60658
ListMap

Economic information

Ore body information

  • Thickness 10.67M
    Length 243.84M
    Width 30.48M

Comments on the geologic information

  • ORE HOSTED IN FRANCISCAN COMPLEX--L. TO L. ; GEOL.DESC: 2 ORE BEDS LIE IN CHERT MORE THAN 200 FT IN THICKNESS WHICH STRIKES N. W. AND DIPS FROM 30 TO 90 S. W. IN PLACES THE BEDS ARE FOLDED. THE TWO ORE BODIES ARE 125 FT. APART. THE LOWEST OR EAST ONE IS 800 FT. LONG, MAXIMUM THICKNESS OF 35 FT, AND CONSISTS OF 1 TO 16 FT. OF HIGH GRADE ORE AT BASE WITH 2 TO 30 OF DISSEMINATED ORE ABOVE. UPPER ORE BODY IS 125 FT. LONG, 100 FT. MAXIMUM WIDTH, AND 4 FT. MAXIMUM THICKNESS. 2 STEEP ANGLE FAULTS HAVE CAUSED THE BLACK BETWEEN THE FAULTS TO BE DISPLACED 200 FT. TO THE W. MANY MINOR FAULTS ARE PRESENT. ORE PASSES INTO CARBONATE AND BEMENTITE AT THE LOWER LEVEL.

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. 223 - 226

  • Deposit

    D.O.M. BULL. 125 1943 P. 166

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.

External references

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.