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Jobe Ranch Mine

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. 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 10077400
MRDS ID W025013
Record type Site
Current site name Jobe Ranch Mine
Related records 10213583

Geographic coordinates

Geographic coordinates: -120.75625, 35.26636 (WGS84)
Elevation 244
Relative position 10 MI W. OF 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

Morro Bay South(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 011E 35 California

Comments on the location information

  • LOCATED IN SE 1/4 SE 1/4 SECTION 35 ; INFO FROM LAND.ST :UNDETERMINED

Commodities

Commodity Importance
Manganese Critical Primary

Materials information

Materials Type of material
Hausmannite Ore

Analytical data

Result AVERAGE GRADE 45 PERCENT MANGANESE

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Chemical Sediment > Chert
    Stratigraphic age (youngest) Late Cretaceous

Nearby scientific data

(1) -120.75625, 35.26636
ListMap

Economic information

Ore body information

  • Thickness 1.22M

Comments on the geologic information

  • ORE HOSTED IN FRANCISCAN COMPLEX--L. TO L. ; GEOL.DESC: ORE OCCURS BETWEEN MASSIVE JASPER AND CONTORTED THIN-BEDDED GREEN AND WHITE CHERT OF THE FRANCISCAN GROUP. IT IS UNCERTAIN WHETHER THE JASPER IS STRATIGRAPHICALLY ABOVE OR BELOW THE ORE HORIZON DUE TO THE DIP DIRECTION. ORE IS IN LENTICULAR MASSES 1 TO 4 FT. THICK, CONSISTING MAINLY OF HAUSMANNITE AND MANGANIFEROUS CHERT IN THE W. ADIT. ORE BECOMES MORE SILICEOUS TOWARD WALLS GRADING INTO MANGANIFEROUS CHERT TO THIN-BEDDED CHERT. ORE IS VEINED BY QUARTZ AND CLEAR RESINOUS NEOTOCITE.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Medium
Significant No

Reference information

Bibliographic references

  • Deposit

    CALIF DOM BULL 152,P 233;

  • Deposit

    D.O.M. BULL 125 1943 PP. 65 , 169

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.