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  3. Mineral Resource Data System (MRDS)

Dorsey and Ridge Claims

Occurrence in Nevada 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. Mining district
  11. Land status
  12. Ownership information
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10031707
MRDS ID M011031
Record type Site
Current site name Dorsey and Ridge Claims

Geographic coordinates

Geographic coordinates: -121.1291, 39.19156 (WGS84)
Elevation 646
Location accuracy 1000(meters)
Relative position N1/2, Assumed Spot Center Of N2, Sect. 6

Site location context

Political divisions (FIPS codes)

Nevada(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Rough And Ready(quadrangle 1:24,000 scale)

Yuba City(quadrangle 1:100,000 scale)

Chico(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Yuba(hydrologic unit)

Lower Sacramento(hydrologic accounting unit)

Sacramento(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Nevada

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 015N 008E 06 N2 California

Commodities

Commodity Importance
Chromium Critical Primary

Materials information

Materials Type of material
Chromite Ore

Nearby scientific data

(1) -121.1291, 39.19156
ListMap

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No
Discovery year 1917

Mining district

District name Wolf Creek Area

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner L. V. Dorsey And D. R. Ridge

Comments on the production information

  • OPERATORS REPORTED THAT IN 1918 54 LONG TONS OF ORE CONTAINING 30 TO 45 PERCENT CR2O3 HAD BEEN MINED BUT NOT SHIPPED. IT IS NOT KNOW WHETHER ANY OF THIS ORE WAS SHIPPED AT A LATER DATE. WHEN INSPECTED IN 1918 IT WAS REPORTED THAT 50 LONG TONS OF ORE HAD BEEN MINED AND PERHAPS 25 TONS REMAINED UNMINED.

Comments on the workings information

  • NUMEROUS SMALL PITS ON OUTCROPS; SHAFT 12 FT. DEEP.

Reference information

Bibliographic references

  • Deposit

    D.O.M. BULL. 134, PT. III, CHAP. 5, P. 247, PL. 13

  • Deposit

    CALIF. JOUR. MINES & GEOLOGY, V. 37, NO. 3, JULY 1941, P. 449

General comments

Subject category Comment text
Deposit FOUR CHROMITE CLAIMS, 80 ACRES. ORE IN THE OUTCROPS WAS TOO LOW IN GRADE TO SHIP. THE SHAFT OPENED THE LENS OF MORE MASSIVE ORE WHICH WAS SAID TO CONTAIN 40 TO 52 PERCENT CR2O3.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-73 Gere, W. U.S. Geological Survey
Updater 01-AUG-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.