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Serra Dos Carajas Area

Producer in Para, Brazil with commodity Iron
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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. Host and associated rocks
  8. Nearby scientific data
  9. Geologic structures
  10. Ore body information
  11. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Ownership information
  14. Reserves and resources
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10107342
MRDS ID W026222
Record type Site
Current site name Serra Dos Carajas Area
Alternate or previous names Includes Carajas Serra Leste, Serra De Sao Felix, Carajas Serra Sul, Carajas Serra Norte N1

Geographic coordinates

Geographic coordinates: -49.99912, -6.08142 (WGS84)
Elevation 600
Relative position SAO LUIS, 730 KM SW OF; BELEM, PARA, 550 KM SW OF; 30 KM NE OF SAO FELIX DO XINGU.

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
Iron Primary

Materials information

Materials Type of material
Goethite Ore
Hematite Ore
Martite Ore
Quartz Gangue

Analytical data

Result HIGH - GRADE ORE AVERAGES (IN PERCENT) 66.7 FE, 2.2 COMBINED SILICA PLUS ALUMINA, 0.05 P. AND MINOR AMTS. OF S AND TI. UNLEACHED ITABIRITE CONTAINS (IN PERCENT) 44 FE, 34.5 SIO2 , 0.5 AL2O3 , 0.02 P, 0.09 MN, AND 0.2 LOSS ON IGNITION.

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Chemical Sediment > Iron Formation
    Stratigraphic age (youngest) Neoarchean

Nearby scientific data

(1) -49.99912, -6.08142
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Economic information

Geologic structures

Type of structure Regional
Structure description Broad Synclinorium. Iron Deposits In Serra Norte And Serra Sul, Plateaus On North And South Limbs Of Synclinorium That Trends And Plunges To The Northwest
Type of structure Local
Structure description Faults And Folds

Ore body information

  • General form BEDDED
    Thickness 250M
    Depth to bottom 400M

Controls for ore emplacement

  • Major Folds And Faults; Mafic Dikes And Sills Affect The Physical Boundaries Of Deposits

Comments on the geologic information

  • THE CARAJAS FM., ITABIRITE & ITABIRITE PROTORE, GRAO PARA GROUP, IS PROBABLY PREC.; THE GROUP RESTS UNCONFORMABLY ON UNDIFFERENTIATED PREC METAMORPHIC & IGNEOUS ROCKS AND IS OVERLAIN BY THE GOROTIRE FM.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Significant No
Discovery year 1967
Discoverer Companhia Meridional De Mineracao, A Subsidiary Of U. S. Steel, During Prospecting Program
Year of first production 1978

Ownership information

  • Type Joint Venture Owner-Op
    Owner Amazonia Mineracao S. A.
  • Type Joint Venture Partner
    Owner Cvrd
    Interest 51
  • Type Joint Venture Partner
    Owner Cia. Meridional De Mineracao
    Interest 49

Comments on the production information

  • PLANNED INCREASE TO 23 - 25 MILLION M. T. ORE AFTER 1980 AND UP TO 45 MILLION M. T. AFTER 1985.

Reserves and resources

  • Type In-situ
    Estimate year 1973
    Total resources 16000000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Iron Fe 67 wt-pct Iron Major 1973

Comments on the reserve resource information

  • E1 TOTAL REPRESENTS (IN BILLIONS OF METRIC TONS) 1.7 MEASURED RESOURCES, 2.5 INDICATED RESOURCES, 11.5 INFERRED RESOURCES. E2 TOTAL - 0.2 MEASURED, 0.5 INDICATED, 1.4 INFERRED
  • SEE RESERVES AND POTENTIAL RESOURCES COMMENTS. ORE (1)-(8) REFER TO AREAS SERRA NORTE N1-8 RESPECTIVELY.

Workings at the site

  • Type of workings Surface/Underground
    Length 3400M

Comments on the workings information

  • M60 AND M30 ARE EXPLORATION WORKINGS. THIS APPLIES TO LEACHED ITABIRITE DEPOSIT. MINING STARTED IN SERRA NORTE N4E DEPOSIT, A HIGH GRADE ORE BODY, WHICH CONTAINS AMMEABLE RESERVE OF 97% MEASURED RESERVE WITH AN INFERRED PLUS UNDERRATED RESERVE OF 6172 MILLION METRIC TONS; 2.5 BILLION METRIC TONS.

Reference information

Bibliographic references

  • Deposit

    RUFF, A. W., TREMAINE, J. H., BERNARDELLI, A. L., BEISIEGEL, V., AND CRUMMOND, N. F., 1973 , EXPLORATION OF ONE OF THE WORLD'S LARGEST IRON - ORE DISTRICTS, BRAZIL'S SERRA DOS CARAJAS: SOC. MINING ENGINEERS A.I.M.E. PREPRINT 73 - I - 94 , 25 P.

  • Deposit

    TOLBERT, G. E., TREMAINE, J. W., MELCHER, G. C., AND GOMES, C. B., 1973 , GEOLOGY AND IRON ORE DEPOSITS OF THE SERRA DOS CARAJAS, PARA, BRAZIL, IN GENESIS OF PRECAMBRIAN IRON AND MANGANESE DEPOSITS: SYMPOSIUM KIEV, 1970 , PROC., P. 271 - 280 . (UNESCO EARTH SCI. SER., V. 9 ).

  • Deposit

    RANGEL, ORLANDO, 1973 , BRAZILIAN AND WORLD IRON ORE RESOURCES -- EXPORTS AND INTERNATIONAL MARKET STEEL INDUSTRY'S DEMANDS: CIA. VALE DO RIO DOCE SPECIAL REPORT, 29 P.; TRANSLATION OF ARTICLE PUBLISHED IN O MINERIO, NOV. - DEC. 1972 , A CVRD PUBLICATION

  • Deposit

    METALS SOURCEBOOK, 1973 A, AMAZONIA MINERACAO'S SERRA DOS CARAJAS IRON - ORE DEPOSIT: METALS SOURCEBOOK, NO. 21 , P. 3 .

  • Deposit

    CESAR, P. DE A.B., 1984, PRINCIPAIS DEPOSITOS MINERAIS: CONCEITOS, METODOLOGIA, E LISTAGEM, CAPITULO IX, IN GEOLOGIA DO BRASIL, EDS., C. SCHOBBENHAUS, D. DE A. CAMPOS, G.R. DERZE, AND H.E. ASMUS: DEPARTAMENTO NACIONAL DA PRODUCAO MINERAL, PP. 359-419.

  • Deposit

    TOLBERT, G.E., TREMAINE, J.W., MELCHER, G.C., AND GOMES, C.B., 1971, THE RECENTLY DISCOVERED SERRA DOS CARAJAS IRON DEPOSITS, NORTHERN BRAZIL: ECONOMIC GEOLOGY, V. 66, NO. 7, P. 985-994.

  • Deposit

    BARROS DE ARAUJO, O.J. AND NOBRE MAIA, R.G., 1991, SERRA DOS CARAJAS; FOLHA SB 22-Z-A: DEPARTAMENTO NACIONAL DA PRODUCAO MINERAL, BRASILIA, 136 P., 2 MAPS, SCALE 1:250,000.

  • Deposit

    1969 DIREXPL MERIDIONAL AND CVRD - DETERMINED EXTENT OF DEPOSITS

  • Deposit

    1972 RECON

  • Other Database

    CIMRI

  • Production

    METALS SOURCEBOOK, 1973 A

  • Reserve-Resource

    RANGEL, O., 1973

General comments

Subject category Comment text
Deposit First Production Year: PLANNED FOR 1978 AT 10 TO 12 MILLION TONS PER YR AND 23 - 25 MILLION M. T. AFTER

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1974 Cooper, Margaret U.S. Geological Survey
Updater 01-JUL-1992 Shaffer, Glenn L. U.S. Geological Survey
Updater 01-FEB-1994 Page, Norman J. U.S. Geological Survey
Updater 01-APR-1995 Page, Norman J. U.S. Geological Survey

Beyond USGS

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

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