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Cachoerinha

Producer 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 10231251
MAS/MILS ID 3510390017
Record type Site
Current site name Cachoerinha
Alternate or previous names Cachoeirinha

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -62.41609, -9.54795 (WGS84)

Site location context

Political divisions (FIPS codes)

Rondonia(province)

Brazil(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Brazil Rondonia

Comments on the location information

  • REGION IS ABOUT 6 KM EAST OF HIGHWAY BR-364 IN RONDONIA STATE NEAR THE NOVO MUNDO MINE, SANTA BARBARA AND POTOSI.

Commodities

Commodity Importance
Tin Critical Primary

Nearby scientific data

Ore Body (1) -62.41609, -9.54795
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Economic information

Comments on the geologic information

  • GEOLOGICALLY THIS MINE IS IS SITUATED ON ENRICHED GRAVELS WHICH ARE BEING REWORKED BY THE CURRENT RIVER SYSTEM.

Economic information about the deposit and operations

Operation type Surface
Development status Producer
Commodity type Metallic
Significant Yes
Discovery year 1970
Mining method Dredging
Year of first production 1974
Milling method Gravity

Ownership information

  • Type Operator
    Owner Empresas Brumadinho(Operator)-Moacyr Motta(Indiv. Owner)
    Interest 100
    Year 1982

Production statistics

  • Year 1974
    Description Annual Ore Production From Dredge 50500 Mt
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Tin Tin 50500mt
  • Year 1975
    Description 160000 Mt
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Tin Tin 160000mt
  • Year 1976
    Description 1218000 Mt
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Tin Tin 1218000mt
  • Year 1977
    Description 1266000 Mt
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Tin Tin 1266000mt
  • Year 1978
    Description 784799 Mt
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Tin Tin 784799mt
  • Year 1979
    Description 1079000 Mt
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Tin Tin 1079000mt
  • Year 1980
    Description 2065000 Mt
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Tin Tin 2065000mt
  • Year 1981
    Accuracy Estimate
    Description Last Actual Data. Prod Est. Forward. 1651000 Mt
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Tin Tin 1651000mt

Comments on the reserve resource information

  • 43% OF ORIGINAL RESERVES MINED, SIGNIFYING SOME 6,500 MT OF TIN SILL EXISTENT. (PER WORLD TIN DIRECTORY 1989)
  • ADDITIONAL RESOURCES WILL LIKELY BE DISCOVERED IN THIS AREA AS EXPLORATION CONTINUES.
  • MINING RESUMED IN 1987 AFTER A SUSPENSION OF OPERATIONS. THE OPERATIONS USES A STANDARD GRAVEL PUMP AS A PILOT PLANT FOR RECOVERY OF CASSITERITE-COLUMBITE FROM CLAY LAYERS UNDERLYING RICH ALLUVIUM WHICH HAD BEEN DREDGED FORM 1974 ONWARDS. RESERVES CONTAIN OVER 300G TIN PER CUBIC METER.

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 5505
    Capacity Units MT ORE/DAY
    Unit Production Cost .99
    Units of Production $/MT ORE
    Operating Days per Year 300
    Operating Shifts per Day 2
    Year of Information 1982

Comments on other economic factors

  • OPERATING COSTS MAY DECREASE IF A PLANNED HYDRO-ELECTRIC PLANT IS INSTALLED IN THE VICINITY OF THE MINE. THERE IS A 5% ROYALTY PAID TO THE OWNER OF THE PROPERTY. THE ROYALTY IS BASED ON NET SMELTER RETURNS. THE SMELTER USUALLY PAYS FOR 96.6 PCT OF THE CONTAINED TIN IN CONCENT. TOTAL TREATMNET CHARGE IS ESTIMATED AT $158.35 IN 1/1/82 $. SALARIES FOR EMPLOYEES IN U.S.$ ARE $3,500 FOR LABOR,16,000 FOR CLERICAL AND 24,000 FOR MANAGEMENT AND SUPERVISION. BENEFITS INCLUDE 1 MONTH BONUS, MEDICAL BENEFITS,WELFARE, AND SOCIAL SERVICES WHICH ADD 50% TO THER ABOVE COSTS. TAXATION FOR TIN PROPERTIES IS ABOUT 35% OF TAXABLE PROFITS.
  • THE DREDGE IS A BUCKET LINE WITH A DIGGING DEPTH OF ABOUT 8 METERS. THERE IS AN ON-BOARD JIG PRIMARY GRAVITY CONCENTR ATION PLANT THAT ARE POWERED BY DIESEL POWER GENERATION THE DREDGE EMPLOYS ABOUT 24 PEOPLE OVER A 3 SHIFT PERIOD. THIS INCLUDES TRACTOR AND DRAGLINE FOR CLEARING.
  • K1 IS THE INITIAL CONCENTRATION TO A 20% SN CONC AND K2 UPGRADES THE CONCENTRATE TO BETWEEN 60 AND 65 % SN. K2 IS THE TINSHED. IT IS UNKNOWN WHAT PORTION OF THE TOTAL FEED THIS PROPERTY MAY REPRESENT.

Reference information

Reporter information

Type Date Name Affiliation Comment
Reporter 21-SEP-1992 Unknown 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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