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Black Oak Cassiorini

Occurrence in El Dorado 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. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Ownership information
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10030066
MRDS ID M007985
Record type Site
Current site name Black Oak Cassiorini
Related records 10284340

Geographic coordinates

Geographic coordinates: -120.82685, 38.8749 (WGS84)
Relative position E1/2 NE1/4 - 2 MI. S. OF GEORGETOWN.

Site location context

Political divisions (FIPS codes)

El Dorado(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Garden Valley(quadrangle 1:24,000 scale)

Placerville(quadrangle 1:100,000 scale)

Sacramento(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

South Fork American(hydrologic unit)

Lower Sacramento(hydrologic accounting unit)

Sacramento(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California El Dorado

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 012N 010E 23 California

Commodities

Commodity Importance
Chromium Critical Primary

Materials information

Materials Type of material
Chromite Ore

Nearby scientific data

(1) -120.82685, 38.8749
ListMap

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Ownership information

  • Type Operator
    Owner Russell Wilson
    First year 1942
    Last year 1943

Comments on the production information

  • ACTIVE 1918 WHEN 36 TONS OF ORE WERE PRODUCED AND IN 1942-43 WHEN 107 TONS OF 47.5 PERCENT CR PRODUCED. RESERVES ARE UNDOUBTEDLY SMALL.

Comments on the workings information

  • OPEN CUTS AND THREE 40-FT. SHAFTS.

Reference information

Bibliographic references

  • Deposit

    CALIF. JOUR. MINES & GEOL. V. 52, NO. 4, P. 465

  • Deposit

    DOM BULL. 134, PT. 3, CHAP. 4, P. 161

General comments

Subject category Comment text
Deposit SMALL AMOUNTS OF UVAROVITE AND KAMMERERITE ARE PRESENT IN THE ORE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1972 Gere, W. 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.