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Sonoma Chrome, Inc. Deposit

Past Producer in Sonoma 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. Land status
  13. Ownership information
  14. Production statistics
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10043536
MRDS ID M100317
Record type Site
Current site name Sonoma Chrome, Inc. Deposit
Alternate or previous names Camp Meeker, Meeker Chrome Mine

Geographic coordinates

Geographic coordinates: -122.97246, 38.45127 (WGS84)
Relative position ASSUMED SPOT AT CENTER OF SECT. 16.

Site location context

Political divisions (FIPS codes)

Sonoma(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Camp Meeker(quadrangle 1:24,000 scale)

Napa(quadrangle 1:100,000 scale)

Santa Rosa(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Russian(hydrologic unit)

Northern California Coastal(hydrologic accounting unit)

Klamath-Northern California Coastal(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Sonoma

Public Land Survey System information

Meridian Township Range Section Fraction State
007N 010W 15,16,17 California

Commodities

Commodity Importance
Chromium Critical Primary

Materials information

Materials Type of material
Chromite Ore

Analytical data

Result HIGH GRADE ORE RANGES 42 TO 51% CR2O3 WITH CR/FE OF 3:1
Result LOW GRADE ORE RANGES 15-20% CR2O3.

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Serpentinite

Nearby scientific data

(1) Franciscan melange
ListMap

Economic information

Ore body information

  • General form LENSE, POD

Economic information about the deposit and operations

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

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner Neuman, Bentley
    Home office Santa Clara, Ca.
    First year 1942
  • Type Owner
    Owner Meeker Estate, M. C.
    Home office Camp Meeker, Ca.
    First year 1918

Production statistics

  • Year 1918
    Material ORE CR
    Accuracy Accurate
    Description Ap_Grade: ^39-42% Chromite
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Cr2O3 Chromium Chromium 41wt-pct

Comments on the workings information

  • PRINCIPAL WORKING WAS AN OPEN CUT 125 FT. LONG BY 20 FT. DEEP, IN WHICH A 55 FT SHAFT WAS SUNK AT THE LOWER END. FROM THE SHAFT, A DRIFT HAD BEEN DRIVEN 40 FT IN ORE, ALONG STRIKE BACK UNDER THE CUT. OTHER WORKINGS INCLUDED PITS LESS THAN 10 FT. DEEP.

Comments on development

  • B. NEWMAN LEASED 2000 ACRES OF THE MEEKER RANCH IN 1942 IN ORDER TO CLEAN OUT OLD CHROMITE WORKINGS AND DEVELOP LOW GRADE ORE.

Reference information

Bibliographic references

  • Deposit

    DOW, D.H. AND THAYER, T.P., 1946, GEOLOGICAL INVESTIGATIONS OF CHROMITE IN CALIF.: CALIF. DIVISION OF MINES BULLETIN 134 PART 2, CHAPT. 1, P. 28,36.

  • Deposit

    LOGAN, C.A., 1918, CHROMIUM, IN BRADLEY, W.W., AND OTHERS, MANGANESE AND CHROMIUM IN CALIF.: CALIF. STATE MINING BUREAU BULLETIN NO. 76, P. 201.

General comments

Subject category Comment text
Deposit CHROMITE DEPOSITS ALINED IN 3 MIAN ORE-BEARING ZONES, WHICH STRIKE N40W. IN 1942, LOWGRADE ORE WAS EXPOSED TO A DEPTH OF 4 FT. OVER TWO AREAS APPROX. 100 FT. BY 50 FT. EACH, APPROX. 3/4 MILE APART FROM EACH OTHER. THIRD ORE BODY A SINGLE LENSE 60 FT. DEEP.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1981 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.