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Cortezdredge

Plant in Rondonia, Brazil with commodity Tin
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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. Nearby scientific data
  7. Economic information about the deposit and operations
  8. Ownership information
  9. Production statistics
  10. Reserves and resources
  11. Workings at the site
  12. Links to other databases
  13. Reporter information

Geologic information

Identification information

Deposit ID 10254922
MAS/MILS ID 3510390031
Record type Site
Current site name Cortezdredge
Alternate or previous names Cortez

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -63.71612, -10.54791 (WGS84)

Site location context

Political divisions (FIPS codes)

Rondonia(province)

Brazil(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Brazil Rondonia

Commodities

Commodity Importance
Tin Critical Primary

Nearby scientific data

Ore Body (1) -63.71612, -10.54791
ListMap

Economic information

Comments on the geologic information

  • THIS MINE IS ONE OF A LARGE ASSORTMENT OF TIN PROPERTIES DISCOVERED IN THIS REGION. THE SIGNIFICANCE OF WHICH CAN
  • THE DREDGE CAPACITY WAS 1630000 MTPY.

Economic information about the deposit and operations

Operation type Surface
Development status Plant
Commodity type Metallic
Significant Yes
Mining method Dredging
Year of first production 1984
Plant type Beneficiation (Mill)
Plant subcategory Gravity
Milling method Gravity

Ownership information

  • Type Owner-Operator
    Owner Brascan Recursos Naturais(Brn)50%Brascan And 50% Bp Minerals
    Interest 100
    Year 1982

Production statistics

  • Year 1987
    Period 1984-1987
    Description Mt Ore/Yr 1984 Thru 1987 1630200 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Tin Tin 1630200mt
  • Year 1988
    Description Mt Ore/Yr 815900 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Tin Tin 815900mt

Comments on the production information

  • PA REPRESENTS A LOW GRADE 25% SN CONCENTRATE WHICH IS SHIPPED TO A TIN SHED FOR UPGRADING TO A 60% SN CONCENTRATE. DATA REGARDING TIN SHED IS BASICALLY UNAVAILABLE. THE NUMBER S REPRESENTED IN "PB" ARE FOR THE CORTEZ FEED AND PRODUCT

Reserves and resources

  • Type In-situ
    Estimate year 1902
    Indicated 5706000mt ore
    Demonstrated 5706000mt ore
    Total resources 5706000mt ore
    Commodity Subtype Grade units Group Importance Year
    Tin Sn 0.015 wt-pct Tin Major 1902

Comments on the reserve resource information

  • ALTHOUGH UNSUBSTANTIATED THERE ARE PROBABLY CONSIDERABLY MORE RESOURCES WHICH WOULD SERVE TO EXTEND THE LIFE OF THIS

Workings at the site

  • Type of workings Surface
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ESTIMATE
    Mining Method DREDGING
    Primary Material Cover SAND, SILT
    Percentage 50
    Secondary Material Cover SAND, GRAVEL
    Percentage 50
    Capacity 8150
    Capacity Units MT ORE/DAY
    Unit Production Cost 1.07
    Units of Production $/MT ORE
    Operating Days per Year 200
    Operating Shifts per Day 3
    Year of Information 1982
  • Type of workings Surface
    Field Value
    MAS Development Schedule # 1
    Mining Record # 2
    Status of Mining Method ESTIMATE
    Mining Method DREDGING
    Capacity 8151
    Capacity Units MT ORE/DAY
    Unit Production Cost .75
    Units of Production $/MT ORE
    Operating Days per Year 200
    Operating Shifts per Day 3
    Year of Information 1989

Comments on other economic factors

  • THE DREDGE IS A YUBA DREDGE WITH A MAXIMUM DIGGING DEPTH OF METERS WILL WORK THE AREAS PREVIOUSLY MINED BY THE DREDGE. LOCATED ON DRY GROUND VERY CLOSE TO THE OPERATION.
  • THE COST OF TRANSPORTATION IS A MAJOR ELEMENT IN THE COSTS ASSOCIATED WITH MINING, AS WELL AS A SECURITY PROBLEM IN THAT TRUCKS ARE SOMETIMES HIJACKED AND THE DRIVERS MURDERED. THIS ALSO CREATES A PROBLEM IN FINDING DRIVERS.
  • COSTS FOR FUEL AND LABOR ARE HIGHER FOR THE TIN PROPERTIES TRANSFER OF THE DREDGE FROM THE CANDEIAS SITE TO THE CORTEZ
  • THE DREDGE TO BE USED AT CORTEZ IS PROBABLY THE SAME ONE USED AT CANDEIAS (UP UNTIL THE ORE WAS EXHAUSTED).

Reference information

Reporter information

Type Date Name Affiliation Comment
Reporter 06-FEB-1995 Sabin, A. E. 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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