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O'Connor Ranch Deposits

Producer in San Luis Obispo 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. Economic information about the deposit and operations
  11. Links to other databases
  12. Bibliographic references
  13. Reporter information

Geologic information

Identification information

Deposit ID 10109389
MRDS ID M020164
Record type Site
Current site name O'Connor Ranch Deposits
Alternate or previous names Mt. Bishop Mine
Related records 10189283

Geographic coordinates

Geographic coordinates: -120.72014, 35.3008 (WGS84)
Relative position ON THE S. W. SLOPE OF A PEAK, ABOUT EIGHT MI. BY ROAD S. W. FROM SAN LUIS OBISPO.

Site location context

Political divisions (FIPS codes)

San Luis Obispo(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

San Luis Obispo(quadrangle 1:24,000 scale)

San Luis Obispo(quadrangle 1:100,000 scale)

San Luis Obispo(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Central Coastal(hydrologic unit)

Central California Coastal(hydrologic accounting unit)

Central California Coastal(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California San Luis Obispo

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 030S 012E 19,20 California

Comments on the location information

  • LOCATED IN SE 1/4 SECTION 19 , AND SW 1/4 SECTION 20 , UTM APPROX.

Commodities

Commodity Importance
Manganese Critical Primary

Materials information

Materials Type of material
Rhodochrosite Ore

Analytical data

Result ORE ABOVE 36 FT. LEVEL IS 45 TO 50 PERCENT MANGANESE, WHEN HAND SORTED.

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

Economic information

Comments on the geologic information

  • ORE HOSTED IN FRANCISCAN COMPLEX--L. TO L. ; GEOL.DESC: ORE BED IS LOCATED NEAR THE TOP OF A LENS OF FRANCISCAN CHERT. ORE IS OVERLAIN BY 10 FT. OF CHERT, AND CONSISTS OF LAYERS OF HARD OXIDE 0.5 INCH TO 2 INCHES THICK, SEPARATED BY PARTINGS 0.1 TO 0.2 INCH THICK PARTLY FILLED BY POWDERY SHALY MATERIAL OR OCHRE. BELOW 36 FT. LEVEL THE OXIDES GRADE INTO PRIMARY ORE OF BANDED RHODOCHROSITE AND MANGANIFEROUS CHERT, WHICH ARE BOTH VEINED BY RESINOUS BROWN NEOTOCITE.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Medium
Significant No

Reference information

Bibliographic references

  • Deposit

    D.O.M. BULL. 152 1950 PP. 235 - 236

  • Deposit

    D.O.M. BULL. 125 1943 P. 170

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-1978 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.