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El Placerito

Past Producer in Sonora, Mexico with commodities Antimony, Gold
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Mineral occurrence model information
  7. Nearby scientific data
  8. Economic information about the deposit and operations
  9. Mining district
  10. Production statistics
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10098745
MRDS ID MX00455
Record type Site
Current site name El Placerito
Related records 10255640

Geographic coordinates

Geographic coordinates: -112.59016, 30.74376 (WGS84)
Relative position PLACER AREA, ABOUT 200 M NE OF LA BOLIVIA MINE.

Site location context

Political divisions (FIPS codes)

Pima(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

Geographic areas

Country State
Mexico Sonora

Comments on the location information

  • ESTIMATE TO WITHIN 0.5 KM.

Commodities

Commodity Importance
Antimony Critical Primary
Gold Secondary

Analytical data

Result 50-70 KG OF MATERIAL ASSAYING 45% SB PER CUBIC METER. (22.5-31.5 KG SB /CM)

Mineral occurrence model information

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

Nearby scientific data

(1) -112.59016, 30.74376
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Economic information

Comments on the geologic information

  • ANTIMONY PLACERS CAN GENERALLY BE TRACED TO THE VEINS FROM WHICH THEY WERE DERIVED. ALLUVIAL PLACERS GRADE UPWARD INTO TALUS (HILLSIDE) PLACERS.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name El Antimonio/La Montana

Production statistics

  • Year 1943
    Period -1943
    Material ORE SB
    Accuracy Estimate
    Description Cp_Grade: ^45% Sb
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Antimony Antimony 45wt-pct

Comments on the production information

  • AGGREGATE PRODUCTION FROM OTHER PLACERS IN THE DISTRICT IS PROBABLY AT LEAST AS GREAT.

Comments on the workings information

  • HUNDREDS OF PLACER PITS IN AREA.

Reference information

Bibliographic references

  • Deposit

    WHITE, D.E. AND GUIZA, REINALDO, 1949, ANTIMONY DEPOSITS OF EL ANTIMONIO DISTRICT, SONORA, MEXICO: U.S. GEOLOGICAL SURVEY BULLETIN 962-B, P.111-112, PLATE 15

  • Production

    WHITE AND GUIZA, 1949.

General comments

Subject category Comment text
Deposit REGION AROUND LA LIMENA, EL PALO VERDE, EL PENSAMIENTO, AND LA PIEDRA AZUL PROBABLY CONTAINS SB PLACERS. GRAVELS IN THIS AREA RANGE FROM 2 TO 4 M IN THICKNESS. ; INFO.SRC : 1 PUB
Deposit ANTIMONY-BEARING HORIZON IN CEMENTED GRAVELS. ANTIMONY GENERALLY CONFINED TO LAYER ABOUT 0.5 M THICK, .75-2.5 M BELOW THE SURFACE, CONSISTING OF REDDISH, CLAY-STAINED , ROUNDED-SUBROUNDED PEBBLES AND BOULDERS UP TO 20 CM IN DIAMETER, IN PARTLY CEMENTED SAND AND GRAVEL. RELATIVELY BARREN OVERLYING MATERIAL MORE THOROUGHLY CEMENTED, (LOCALLY CONTAINING ENOUGH CALCIUM CARBONATE TO FORM A CALICHE). LESS CEMENTED MATERIAL GENERALLY UNDERLIES THE ORE HORIZON. OLD STREAM CHANNELS WORKED FOR GOLD CONTENT, BUT ONLY NEGLIGIBLE AMOUNTS OF GOLD FOUND IN ANTIMONY LAYER.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-DEC-1987 Leonard, Kenneth R. (Page, Norman J.) U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

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