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Ceriumbras Best Group

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. Workings at the site
  11. Links to other databases
  12. Reporter information

Geologic information

Identification information

Deposit ID 10135374
MAS/MILS ID 3510390035
Record type Site
Current site name Ceriumbras Best Group
Alternate or previous names Ceriumbras

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -65.13275, -9.44796 (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) -65.13275, -9.44796
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Economic information

Comments on the geologic information

  • MINERALIZATION OCCURS IN GREISEN BODIES AND STOCKWORKS OF VEINS IN SUBVOLCANIC GRANITE INTRUSIVES IN THE PRECAMBRIAN BRAZILIAN COMPLEX. THE GRANITE COMPLEXES BELONG TO THE RAPAKIVI . EROSION AND WEATHERING OF THESE DEPOSITS HAVE RESULTED IN THE FORMATION OF DEPOSITS IN PALEO VALLEY FILL, PRESENT VALLEY FILL, COLLUVIAL MATERIAL AND SEDIMENT -BEDROCK INTERFACES. THE CERIUMBRAS DEPOSIT IS SHALLOW ,3-4 METERS IN THICKNESS, WITH ONLY 2-3 METERS OF CLAY AND SOIL OVERBURDEN. MINERALOGI CALLY THIS DEPOSIT CONTAINS A MUCH HIGHER ILMENITE CONTENT THAN THE OTHER RONDONIA DEPOSITS.

Economic information about the deposit and operations

Operation type Surface
Development status Plant
Commodity type Metallic
Significant Yes
Mining method Coal Mining Methods - Hydraulic
Plant type Beneficiation (Mill)
Plant subcategory Gravity
Milling method Gravity

Ownership information

  • Type Owner-Operator
    Owner Best Group( Best Metais E Soldas And Industrial Amazonense)
    Interest 100
    Year 1982

Production statistics

  • Year 1988
    Period 1981 Thru 1988
    Description Mt Ore/Yr 1981 Thru 1988 630000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Tin Tin 630000mt
  • Year 1990
    Period 1989 Thru 1990
    Description Mt Ore/Yr 1989 Thru 1990 630000 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Tin Tin 630000mt
  • Year 1991
    Description Mt Ore/Yr 59100 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Tin Tin 59100mt

Comments on the reserve resource information

  • 1-89 RESOURCE 1.948,500 MT PER UPDATED ETD.
  • ACTIVE MINES IN THIS GROUP ARE: RIACHUELO, SANTA ANTONIO, MINA DO RETIRO.

Workings at the site

  • Type of workings Surface
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ACTUAL
    Mining Method ALLUVIAL MINING
    Primary Material Cover SAND, SILT
    Percentage 50
    Secondary Material Cover SAND, GRAVEL
    Percentage 50
    Capacity 2100
    Capacity Units MT ORE/DAY
    Unit Production Cost 2.46
    Units of Production $/MT ORE
    Operating Days per Year 300
    Operating Shifts per Day 2
    Year of Information 1982
  • Type of workings Surface
    Field Value
    MAS Development Schedule # 2
    Mining Record # 1
    Status of Mining Method ESTIMATE
    Mining Method HYDRAULICKING
    Capacity 2100
    Capacity Units MT ORE/DAY
    Unit Production Cost 2.35
    Units of Production $/MT ORE
    Operating Days per Year 300
    Operating Shifts per Day 2
    Year of Information 1989

Comments on other economic factors

  • FINAL CONS ARE SENT TO THE BEST SMELTER IN SAO PAULO. IT IS EVIDENT THAT SUBSTANTIAL SAVINGS COULD BE ATTAINED IN FREIGHT AND PROCESSING COSTS IF THE COMPANY INSTALLED A DRY MAGNETIC SEPERATOR. THE UNIT WOULD ABLE TO UPGRADE THE 35% CONCENTRATE TO OVER 60%, PERHAPS 70%. THE ILMENITE HAS NO ECONOMIC VALUE BECAUSE THE TRANSPORT COST EXCEEDS THE SALES VALUE.
  • OF ABOUT 5-10% SN. THE MATERIAL IS THEN FED TO A TINSHED WHICH PRODUCES A 35% SN CONCENTRATE. THIS CON HAS A RELATIVE LY HIGH ILMENITE CONTENT. HENCE THE TIN CONTENT IS ONLY 35%.
  • THE CERIUMBRAS MINE USES TWO STANDARD GRAVEL PUMP-MOBILE JIG PLANT. EACH HYDRAULIC MONITOR-GRAVEL PUMP UNIT HAS A CAPACITY OF 70 CUBIC METERS PER HOUR. IN 1981 315000 METERS OR 630,000 MT WERE MINED AND PROCESSESED. ALMOST HALF OF THE OPERATING TIME IS SPENT REMOVING 0 GRADE OVERBURDEN.
  • GRADE INCREASED FROM .019% IN 1981

Reference information

Reporter information

Type Date Name Affiliation Comment
Reporter 21-DEC-1992 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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