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Trombetas

Producer in Para, Brazil with commodities Aluminum, Silica
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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. Mining district
  11. Mineral rights holdings
  12. Land status
  13. Ownership information
  14. Production statistics
  15. Reserves and resources
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. Reporter information

Geologic information

Identification information

Deposit ID 10134390
MAS/MILS ID 3510250002
Record type Site
Current site name Trombetas

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -55.96595, -1.49833 (WGS84)
Elevation 500
Location accuracy 1000(meters)

Site location context

Political divisions (FIPS codes)

Para(province)

Brazil(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Brazil Para

Commodities

Commodity Importance
Aluminum Critical Primary
Silica Secondary

Materials information

Materials Type of material
Gibbsite Unknown

Nearby scientific data

Ore Body (1) -55.96595, -1.49833
ListMap

Economic information

Ore body information

  • Depth to top 6.2M
    Field Value
    MAS Matrix # 1
    MAS Column # 3
    Type of Orebody #1 LATERITE
    Shape of Orebody #1 TABULAR
    Type of Orebody #2 REPLACEMENT
    Shape of Orebody #2 LENTICULAR
    Shape of Orebody #3 MASSIVE
    Primary mode of Origin RESIDUAL CONCENT
    Secondary mode of Origin OXIDATION
    Primary Ore Control LITHOLOGY
    Secondary Ore Control OTHER
    Minimum Depth to Top 1.7
    Avg. Thick. Unconsol. Mat. 6.2
    Min. Thick. Unconsol. Mat. 1.7
    Date of Last Modification 900919

Economic information about the deposit and operations

Operation type Surface
Development status Producer
Commodity type Metallic
Significant Yes
Discovery year 1967
Mining method Open Pit
Year of first production 1975
Milling method Sizing

Mining district

District name Amazonas

Mineral rights holdings

Type of mineral rights Minerals Only

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner Mineracao Rio Do Norte S. A. (Mrn)
    Home office Brazil
    Year 1993
  • Type Owner
    Owner Companhia Vale Do Rio Doce (Cvrd)
    Interest 40
    Home office Brazil
    Year 1993
  • Type Owner
    Owner Alcan Aluminum Ltd.
    Interest 12
    Home office Canada
    Year 1993
  • Type Owner
    Owner Alcoa - Aluminum Co. Of America
    Interest 13.2
    Home office United States
    Year 1993
  • Type Owner
    Owner Gencor
    Interest 14.8
    Home office South Africa
    Year 1994
    First year 1994
  • Type Owner
    Owner Companhia Brasileira De Aluminio (Cba)
    Interest 10
    Home office Brazil
    Year 1993
  • Type Owner
    Owner Norsk Hydro: (Owns 70% Of Hydro Aluminium As)
    Interest 5
    Home office Norway
    Year 1993
  • Type Owner
    Owner Reynolds
    Interest 5
    Home office Virginia
    Year 1993

Production statistics

  • Year 1979
    Description Bauxite Ore 1010000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Aluminum Aluminum 1010000mt
  • Year 1980
    Description Bauxite Ore 4086000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Aluminum Aluminum 4086000mt
  • Year 1981
    Description Bauxite Ore 5076000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Aluminum Aluminum 5076000mt
  • Year 1982
    Description Bauxite Ore 4260000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Aluminum Aluminum 4260000mt
  • Year 1983
    Description Bauxite Ore 5088000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Aluminum Aluminum 5088000mt
  • Year 1984
    Description Bauxite Ore 7621000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Aluminum Aluminum 7621000mt
  • Year 1985
    Description Bauxite Ore 6305000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Aluminum Aluminum 6305000mt
  • Year 1986
    Description Bauxite Ore 4926000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Aluminum Aluminum 4926000mt
  • Year 1990
    Period 1987 To 1990
    Accuracy Estimate
    Description Bauxite Ore Production 1987 To 1990 7576000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Aluminum Aluminum 7576000mt
  • Year 1997
    Period 1991 To 1997
    Accuracy Estimate
    Description Bauxite Ore Production 1991 To 1997 9848000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Aluminum Aluminum 9848000mt
  • Year 2024
    Period 1998 To 2024
    Accuracy Estimate
    Description Bauxite Ore Production 1998 To 2024 12121000 Mtpy
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Aluminum Aluminum 1212100mt

Comments on the production information

  • AT PRESENT, THE PRODUCTION CAPACITY OF THE TROMBETAS PROJECT IS AT 8.5 MILLION METRIC TONS PER YEAR. THE ORIGINAL RATED PRODUCTION CAPACITY FOR THE TROMBETAS PROJECT WAS 3.35 MILLION METRIC TONS PER YEAR IN 1979. 1994 PLANS CALL FOR EXPANSION TO 12 MILLION MT IN 1996, IN ORDER TO FEED THE ALUNORTE ALUMINUM PLANT DUE TO COME ON LINE IN 1995.
  • AS OF FEB 9, 1993, MRN IS TO SUPPLY A MINIMUM OF 500,000 MTPY BAUXITE TO CIS (UKRAINE AND KAZAKHSTAN). ESTIMATED PRICE REPORTED TO BE $22.50-$23/MT F.O.B. TROMBETAS.

Reserves and resources

  • Type In-situ
    Estimate year 1987
    Indicated 1200000mt ore
    Demonstrated 1200000mt ore
    Total resources 1200000mt ore
    Commodity Subtype Grade units Group Importance Year
    Aluminum Al2O3 50 wt-pct Aluminum Major 1987
  • Type In-situ
    Estimate year 1986
    Indicated 600000mt ore
    Demonstrated 600000mt ore
    Total resources 600000mt ore
    Commodity Subtype Grade units Group Importance Year
    Aluminum Al2O3 50.2 wt-pct Aluminum Major 1986
    Silica SiO2 4.2 wt-pct Silica Minor 1986

Comments on the reserve resource information

  • Q-MATRIX 1 COLUMN 1 EQUALS Q-MATRIX 9 COLUMN 2, Q-MATRIX 1 COLUMN 3 EQUALS Q-MATRIX 9 COLUMN 4

Workings at the site

  • Type of workings Surface
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ESTIMATE
    Mining Method OPEN PIT
    Avg. Overburden Thickness 1.7
    Primary Material Cover M-HARD ROCKS
    Hardness of Ore M-HARD ROCKS
    Capacity 24284
    Capacity Units MT ORE/DAY
    Operating Days per Year 312
    Operating Shifts per Day 3
    Year of Information 1987

Reference information

Bibliographic references

  • Ownership

    METALS WEEK FOCUS, MARCH 1993, P.4

  • Reserve-Resource

    MINING MAGAZINE, JANUARY 1983, "TROMBETAS BAUXITE", PP 18 TO 25.

  • Reserve-Resource

    AMM, DEC. 5, 1986, "MRN UPS BAUXITE EXPORT PRICE DESPITE CUSTOMER OBJECTIONS", PP1, 10.

  • Deposit

    MINERAL YEAR BOOK,1972, V.III,INTERNATIONALS, US BUREAU OF MINES.

  • Deposit

    ENG. MINING JOURNAL, JAN.1976, SURVEY OF MINES AND EXPANSION

  • Deposit

    ENG. MINING JOURNAL,MAY 1973, ROUND UP OF 21 MIN. EXP.IN BRAZIL.

  • Deposit

    LEFOND,SJ,1973, BRAZILIAN MINING, RELAXED GOV'T ATT. PAVE WAY

  • Deposit

    PLOITING CRIT. RESERVES, MIN. ENG., V.25, P.31-45.

  • Deposit

    MINING JOURNAL, FEB., 2, 1990, P82.

  • Deposit

    MINING JOURNAL, MARCH, 31, 1990, P243.

  • Deposit

    AMM, FEB. 18, 1987, MRN TO LIFT BAUXITE TAG MARCH 31, PP1,8

  • Deposit

    ERROL D. SEHNKE, BAUXITE AND ALUMINA SPECIALIST BRANCH OF METALS,PRELIMINARY TRIP REPORT FOR TRAVEL TO BRAZIL, (OCT. 30 - NOV. 19, 1993).

Reporter information

Type Date Name Affiliation Comment
Reporter 13-SEP-1995 Wilburn, David R. 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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