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Zerfing Ranch Deposit

Past Producer in San Luis Obispo county in California, United States with commodity Chromium
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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. Mining district
  13. Land status
  14. Ownership information
  15. Production statistics
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10043672
MRDS ID M100494
Record type Site
Current site name Zerfing Ranch Deposit
Alternate or previous names Old Creek Deposit

Geographic coordinates

Geographic coordinates: -120.84154, 35.48302 (WGS84)
Elevation 137
Location accuracy 1000(meters)
Relative position Assumed Spot Center Se, Sect. 24

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 North(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 028S;028S 010E;010E 24;24 SE OF SE California

Commodities

Commodity Importance
Chromium Critical Primary

Materials information

Materials Type of material
Chromite Ore

Analytical data

Result AVG. 46% CR2O3
Result 8% SIO2

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Serpentinite
    Stratigraphic age (youngest) Late Jurassic

Nearby scientific data

(1) -120.84154, 35.48302
ListMap

Economic information

Ore body information

  • General form OTHER

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Northern San Luis Obispo Area

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Zerfing, A. L.

Production statistics

  • Year 1918
    Material ORE
    Accuracy Estimate
    Description Ap_Grade: ^Avg. 46% Cr2o3
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Cr2O3 Chromium Chromium 46wt-pct

Comments on the workings information

  • WORKINGS CONSISTED OF A CAVED STOPE AND DRIFT (1941).

Reference information

Bibliographic references

  • Deposit

    WALKER, G.W. AND GRIGGS, A.B., 1953, CDMG BULL 134, PART 2, CHAPT. 2, P. 58, 85

  • Production

    CDMG BULL 134, PT. 2, CHAPT. 2, P. 58

General comments

Subject category Comment text
Deposit DEPOSIT CONSISTED OF A STREAK 8 IN. TO 2 FT. WIDE AND 60 FT LONG.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-82 Oster, Karel L. (Albers, John P.) 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.