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Trigo Placers

Past Producer in La Paz county in Arizona, United States with commodities Gold, Platinum
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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. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Land status
  16. Links to other databases
  17. Bibliographic references
  18. Reporter information

Geologic information

Identification information

Deposit ID 10027938
MRDS ID M004568
Record type Site
Current site name Trigo Placers
Alternate or previous names Colorado River Placers
Related records 10302148

Geographic coordinates

Geographic coordinates: -114.64329, 33.05368 (WGS84)
Elevation 305
Location accuracy 1000(meters)
Relative position IN TRIGO MOUNTAINS AND ALONG COLORADO RIVER ABOUT 13 MI SOUTH OF CIBOLA, Est Estimated Within What Is Probably Main Placer Area

Site location context

Political divisions (FIPS codes)

La Paz(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Picacho SW(quadrangle 1:24,000 scale)

Trigo Mountains(quadrangle 1:100,000 scale)

Salton Sea(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Imperial Reservoir(hydrologic unit)

Lower Colorado(hydrologic accounting unit)

Lower Colorado(hydrologic subregion)

Lower Colorado(hydrologic region)

Federal lands

FWS(Federal land areas administered by FWS)

Geographic areas

Country State County
United States Arizona La Paz

Public Land Survey System information

Meridian Township Range Section Fraction State
Gila and Salt River 002S;003S;004S 023W;024W Arizona

Comments on the location information

  • LOCATION GIVEN IS AT MOUTH OF BLACK ROCK WASH ABOUT 15 MI SOUTH OF CIBOLA IN IMPERIAL NATIONAL WILDLIFE REFUGE. RECORD ORIGINALLY INDICATED A LOCATION IN T. 2 N., R. 21 W., BUT THIS DID NOT APPEAR LIKELY

Commodities

Commodity Importance
Gold Primary
Platinum Critical Tertiary

Comments on the commodity information

  • UNABLE TO FIND SOURCE OF PGE DATA (1989); NO MENTION OF PT IN REFERENCES CITED. MOST OF GOLD IS FLAT GRAINS

Materials information

Materials Type of material
Gold Ore

Mineral occurrence model information

Model code 119
USGS model code 39a
Deposit model name Placer Au-PGE
Mark3 model number 54

Host and associated rocks

  • Host or associated Host
    Rock type Unconsolidated Deposit > Gravel
    Stratigraphic age (youngest) Holocene

Nearby scientific data

(1) -114.64329, 33.05368
ListMap

Economic information

Ore body information

  • General form PROBABLY POCKETS AND BARS
    Depth to top 0M

Controls for ore emplacement

  • Deposits Occur In Arroyo Bottom And In Ancient Bar And Channels

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Year of first production 1866
Year of last production 1966

Mining district

District name Trigo District

Land status

Ownership category Federal

Comments on the workings information

  • FOR MANY YEARS, SMALL-SCALE, INTERMITTENT DRY WASHING OPERATIONS WERE CARRIED ON IN THIS FIELD, BUT NO RECORD OF PRODUCTION EXISTS

Comments on development

  • PRODUCED INTERMITTENTLY THROUGH 1966

Reference information

Bibliographic references

  • Deposit

    JOHNSON, M.G., 1972, PLACER GOLD DEPOSITS OF ARIZONA: U.S. GEOLOGICAL SURVEY BULLETIN 1355, P. 75-76.

  • Deposit

    WILSON, E.D., 1961, GOLD PLACERS AND PLACERING IN ARIZONA: ARIZONA BUREAU OF MINES BULLETIN 168, P. 25.

  • Production

    WILSON, 1961, P. 25.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-APR-72 Gere, W. U.S. Geological Survey CORRECTED COUNTY NAME
Updater 01-OCT-79 Hall, R.K. (Creasey, S.C.) U.S. Geological Survey
Updater 01-DEC-89 Peterson, Jocelyn A. U.S. Geological Survey
Updater 01-JUL-90 Bolm, Karen S. 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 Arizona resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.