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Chilcobija

Producer in La Paz, Bolivia with commodity Antimony
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Warning: This record lacks important information: bibliographic references, which we consider necessary for a comprehensive report.
Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Nearby scientific data
  8. Ore body information
  9. Economic information about the deposit and operations
  10. Ownership information
  11. Production statistics
  12. Reserves and resources
  13. Workings at the site
  14. Links to other databases
  15. Reporter information

Geologic information

Identification information

Deposit ID 10133540
MAS/MILS ID 3350200090
Record type Site
Current site name Chilcobija
Alternate or previous names Chilcobija Antimony Mine

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -66.09945, -21.39756 (WGS84)
Elevation 4000
Location accuracy 1000(meters)

Site location context

Political divisions (FIPS codes)

La Paz(province)

Bolivia(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Bolivia La Paz

Commodities

Commodity Importance
Antimony Critical Primary

Materials information

Materials Type of material
Stibnite Unknown

Nearby scientific data

Ore Body (1) -66.09945, -21.39756
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Economic information

Ore body information

  • Strike N25W
    Dip 70W
    Thickness 1.5M
    Length 150M
    Width 60M
    Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 FISSURE VEIN
    Shape of Orebody #1 TABULAR
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control FOLDING
    Strike And Dip N25W:70W
    Date of Last Modification 850808

Economic information about the deposit and operations

Operation type Underground
Development status Producer
Commodity type Metallic
Significant Yes
Discovery year 1900
Year of first production 1900
Milling method Flotation

Ownership information

  • Type Owner-Operator
    Owner Empresa Minera Unificada S. A. (Emusa)
    Interest 100
    Home office Bolivia
    Year 1982

Production statistics

  • Year 1977
    Description Antimony Ore 65600 Mt Ore/Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Antimony Antimony 65600mt
  • Year 1978
    Description Antimony Ore 69800 Mt Ore/Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Antimony Antimony 69800mt
  • Year 1979
    Description Antimony Ore 89000 Mt Ore/Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Antimony Antimony 89000mt
  • Year 1980
    Description Antimony Ore 105000 Mt Ore/Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Antimony Antimony 105000mt
  • Year 1981
    Description Antimony Ore 132000 Mt Ore/Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Antimony Antimony 132000mt
  • Year 1982
    Description Antimony Ore 95000 Mt Ore/Year
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Antimony Antimony 95000mt

Reserves and resources

  • Type In-situ
    Estimate year 1982
    Measured 148900mt ore
    Indicated 227400mt ore
    Demonstrated 376300mt ore
    Inferred 284900mt ore
    Total resources 661200mt ore
    Commodity Subtype Grade units Group Importance Year
    Antimony Sb 4.77 wt-pct Antimony Major 1982

Comments on the reserve resource information

  • THERE IS NO INDICATION THAT THE CONTRACORS EVER VISISTED THE MIN E TO COLLECT SPECIFIC MINE DATA. THE DEMONSTRATED RESERVES AS PUBLISHED IN THE EM/J INTERNATIONAL DIRECTORY OF MINING WERE 361013 MTPD (MTB) AND AN IDENTIFIED RESOURCES OF 536,771 MTPD (M TB). THE COMPANY PLANS TO EXPAND MINE AND MILL CAPACITY FROM 250 MTPD TO 300 MTPD ORE.

Workings at the site

  • Type of workings Underground
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ESTIMATE
    Mining Method HORIZ CUT & FILL W/WASTE ROCK 10-60
    Percent Recovery 95
    Capacity 317
    Capacity Units MT ORE/DAY
    Unit Production Cost 14.59
    Units of Production $/MT ORE
    Operating Days per Year 300
    Operating Shifts per Day 3
    Year of Information 1982

Comments on other economic factors

  • THE MINING OPERATION WAS MECHANIZED IN 1960. PRODUCTION CONTINUED, WITHOUT INTERRUPTION, SINCE 1974.

Reference information

Reporter information

Type Date Name Affiliation Comment
Reporter 11-OCT-96 Palencia, Cesar M. U.S. Bureau of Mines

Beyond USGS

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

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