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San Domingo Placers

Past Producer in Maricopa county in Arizona, United States with commodities Gold, Sand and Gravel, Construction, 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. Economic information about the deposit and operations
  13. Mining district
  14. Land status
  15. Ownership information
  16. Reserves and resources
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10027072
MRDS ID M001911
Record type Site
Current site name San Domingo Placers
Alternate or previous names Santo Domingo

Geographic coordinates

Geographic coordinates: -112.64992, 33.89478 (WGS84)
Elevation 853
Location accuracy 100(meters)
Relative position 45 MI NORTHWEST OF PHOENIX, 7 MI SOUTHEAST OF WICKENBURG, 3 MI NORTHWEST OF MORRISTOWN, Acc Accurate Within Placer Area

Site location context

Political divisions (FIPS codes)

Maricopa(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Wickenburg(quadrangle 1:24,000 scale)

Phoenix North(quadrangle 1:100,000 scale)

Phoenix(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Hassayampa(hydrologic unit)

Lower Gila-Agua Fria(hydrologic accounting unit)

Lower Gila(hydrologic subregion)

Lower Colorado(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management AZ)

Bureau of Land Management AZ BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States Arizona Maricopa

Public Land Survey System information

Meridian Township Range Section Fraction State
Gila and Salt River 006N}007N 004W}004W 02,03}25,26,35 Arizona

Comments on the location information

  • DRAINAGE SYSTEM OF SAN DOMINGO WASH, EAST TRIBUTARY OF HASSAYAMPA CREEK. WESTERN FOOTHILLS OF WICKENBURG MOUNTAINS. LOCATION GIVEN IS ABOUT 1 MI UPSTREAM FROM MOUTH OF SAN DOMINGO WASH INFO FROM LAND.ST :(1964)

Commodities

Commodity Importance
Gold Primary
Sand and Gravel, Construction Primary
Platinum Critical Tertiary

Comments on the commodity information

  • GOLD IS COARSE AND ANGULAR. UNVERIFIED REPORT OF PT

Materials information

Materials Type of material
Gold Ore
Gravel Ore
Platinum Ore

Analytical data

Result GOLD IS 925 TO 965 IN FINENESS
Result GOLD AVERAGES $0.40-0.80/CY
Result AVERAGE GRADE FROM 1870-1880 WAS $0.68/CY

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 Associated
    Rock type Metamorphic Rock > Gneiss
  • Host or associated Host
    Rock type Unconsolidated Deposit > Gravel

Nearby scientific data

(1) -112.64992, 33.89478
ListMap

Economic information

Ore body information

  • General form PROBABLY POCKETS AND BARS
    Thickness 6.1M
    Depth to top 0M

Comments on the geologic information

  • GOLD IS MOSTLY NEAR BEDROCK IN THE UPPER REACHES OF THE GULCHES, BUT IS MORE WIDELY DISTRIBUTED THROUGHOUT THE GRAVELS OF THE LOWER COUNTRY

Economic information about the deposit and operations

Development status Past Producer
Commodity type Both
Deposit size Medium
Significant No
Discovery year 1870
Year of first production 1870
Year of last production 1962
Production years GOLD: 1870-1880, 1905-1952; GRAVEL AND GOLD: 1960'S

Mining district

District name San Domingo District

Land status

Ownership category Federal

Ownership information

  • Type Operator
    Owner United Placers Industries, Inc.
    First year 1962

Comments on the production information

  • MANY OF THE NUGGETS WERE WORTH ABOUT $1 AND SOME WORTH $30 IN THE EARLY DAYS; IN 1925, $10-$15 WAS COMMON. SAN DOMINGO DISTRICT HAS THE LARGEST PLACER GOLD PRODUCTION IN MARICOPA CO. GRAVELS AVERAGED 0.032 OZ/CY AU (APPROX. 0.021 OZ/TON) FROM 1870-1962. MOST OF THE AREA'S ACTIVITY TOOK PLACE BETWEEN 1870 AND 1880, BUT THERE WAS CONTINUOUS ACTIVITY FROM 1905-1951

Reserves and resources

  • Type In-situ
    Estimate year 1985
    Total resources 34000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 0.77 g/mt Gold Major 1985

Comments on the workings information

  • PLACER WORKINGS 6-7 MI LONG BY AN IRREGULAR WIDTH. NOT CONFINED TO THE STREAM BEDS BUT ARE ALSO FOUND ON SOME OF THE GRAVELY MESAS. GRAVELS WORKED BY DRY WASHING OR BY ROCKERS WHEN THERE WAS SUFFICIENT WATER. DRYLAND DREDGE OPERATED 1960-1962.

Comments on development

  • WORKED INTERMITTENTLY.

Reference information

Bibliographic references

  • Deposit

    WILSON, E.D., 1961, GOLD PLACERS AND PLACERING IN ARIZONA: ARIZONA BUREAU OF MINES BULLETIN 168, P. 59-60.

  • Deposit

    JOHNSON, M.G., 1972, PLACER GOLD DEPOSITS OF ARIZONA: U.S. GEOLOGICAL SURVEY BULLETIN 1355, P. 21-23.

  • Deposit

    QUIRING, HEINRICH, 1962, PLATINMETALLE IN DIE METALLISCHEN ROHSTOFFE 16 BAND: STUTTGART, FERDINAND ENKE VERLAG, P. 245.

  • Deposit

    GALBRAITH, F.W., AND BRENNAN, D.J., 1970, MINERALS OF ARIZONA: ARIZONA BUREAU OF MINES BULLETIN 181, P. 5.

  • Deposit

    ORRIS, G.J., AND BLISS, J.D., 1985, GEOLOGIC AND GRADE-VOLUME DATA ON 330 GOLD PLACER DEPOSITS: U.S. GEOLOGICAL SURVEY OPEN-FILE REPORT 85-213, 172 P.

  • Other Database

    CIMRI

  • Reserve-Resource

    ORRIS AND BLISS, 1985

General comments

Subject category Comment text
Deposit THE SOURCE OF THE GOLD IS BELIEVED TO BE QUARTZ VEINS IN THE NEARBY PRECAMBRIAN ROCKS
Deposit MRDS RECORD M045471 HAS BEEN DELETED.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-75 Blair, Will N. U.S. Geological Survey ADDED DATA FOR SAND AND GRAVEL, SOME GOLD INFORMATION
Updater 01-DEC-80 Harner, Joy L. U.S. Geological Survey
Updater 01-DEC-89 Peterson, Jocelyn A. U.S. Geological Survey
Updater 01-OCT-92 Orris, Greta J. 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.