1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Green Deposit, Farmer Property

Past Producer in Placer county in California, United States with commodity Chromium
Map
XML
JSON
KML
B
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. Ore body information
  10. Economic information about the deposit and operations
  11. Mining district
  12. Ownership information
  13. Production statistics
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10032077
MRDS ID M012250
Record type Site
Current site name Green Deposit, Farmer Property
Alternate or previous names Americus Deposit

Geographic coordinates

Geographic coordinates: -120.91936, 38.99072 (WGS84)

Site location context

Political divisions (FIPS codes)

Placer(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Greenwood(quadrangle 1:24,000 scale)

Placerville(quadrangle 1:100,000 scale)

Sacramento(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

North Fork American(hydrologic unit)

Lower Sacramento(hydrologic accounting unit)

Sacramento(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Placer

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 013N 009E 12 SE California

Commodities

Commodity Importance
Chromium Critical Primary

Materials information

Materials Type of material
Chromite Ore

Analytical data

Result ORE 21.1 % CR2O3
Result 12.0 % SIO2

Nearby scientific data

(1) -120.91936, 38.99072
ListMap

Economic information

Ore body information

  • General form LENSE

Comments on the geologic information

  • GEOL.DESC: ORE OCCURRED AS A SERIES OF SMALL LENSES STRIKING ABOUT N. 35 DEG. W. NO ORE EXPOSED IN WORKINGS IN 1917.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Significant No

Mining district

District name Gas Canyon Area

Ownership information

  • Type Operator
    Owner R. H. Farmer
    First year 1918
  • Type Owner
    Owner R. H. Farmer, J. G. Dodds
    First year 1918

Production statistics

  • Year 1920
    Period Pre-1920
    Material ORE CR
    Accuracy Estimate
    Description Cp_Grade: ^21.1 % Cr2o3
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Cr2O3 Chromium Chromium 21wt-pct

Comments on the workings information

  • WORKINGS CONSISTED OF A 24 FT DEEP SHAFT WITH 12 FT OF SHORT DRIFTS AT BOTTOM.

Reference information

Bibliographic references

  • Deposit

    DOM BULL. 134, PT. 3, CHAP. 5, P. 229, PL. 13

  • Deposit

    DOM BULL. 76, P. 161

  • Deposit

    SOUTHERN PACIFIC CO., MINERALS FOR INDUSTRY, NORTHERN CALIFORNIA, V. 2, P. 13-15

  • Production

    CDMG BULL 134, PT. 3, CHAPT. 5, P. 201

General comments

Subject category Comment text
Deposit ORE OCCURRED AS A SERIES OF SMALL LENSES WITH ABOVE STRIKE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1973 Gere, W. U.S. Geological Survey
Updater 01-JAN-1983 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.