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  3. Mineral Resource Data System (MRDS)

Azul Carajas Deposits

Prospect in Para, Brazil with commodity Manganese
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Host and associated rocks
  7. Nearby scientific data
  8. Economic information about the deposit and operations
  9. Mining district
  10. Ownership information
  11. Reserves and resources
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10024439
MRDS ID ISM0152
Record type Site
Current site name Azul Carajas Deposits
Alternate or previous names Serra Dos Carajas, Igarape Azul, Cerro Azul

Geographic coordinates

Geographic coordinates: -50.4158, -6.09809 (WGS84)
Elevation 550

Site location context

Political divisions (FIPS codes)

Para(province)

Brazil(country)

South America(continent)

Land(continent)

Geographic areas

Country State
Brazil Para

Comments on the location information

  • 150 KM SW OF MARABA, NORTH-CENTRAL BRAZIL, 10 KM S OF IRON-ORE DEPOSIT AT CARAJAS.

Commodities

Commodity Importance
Manganese Critical Primary

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Siltstone
    Rock unit name Rio Fresco Formation
    Rock description Rio Fresco Formation
    Stratigraphic age (youngest) Paleoproterozoic
    Stratigraphic age (youngest) Paleoproterozoic

Nearby scientific data

(1) -50.4158, -6.09809
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Economic information

Comments on the geologic information

  • ; CPML + BIRNESSITE + LITHIOPHORITE; GBST + KLNT + GTHT; RDCR; SUPERGENE ORE FORMED FROM LAMINATED RHODOCHROSITE AND SILTSTONE AVERAGING 15% MN AND 33 TO 54 M THICK.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic
Significant No
Discovery year 1971
Year of first production 1985

Mining district

District name Maraba District (Carajas Region)

Ownership information

  • Type Owner
    Owner Amazonia Mineracao (Amza) (Affiliate Of Companhia Vale De Rio Doce, Cvrd)

Comments on the production information

  • NONE OR MINOR 500,000 TONS ORE

Reserves and resources

  • Type In-situ
    Estimate year 1979
    Total resources 65000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Manganese Mn 38 wt-pct Manganese Major 1979

Comments on the reserve resource information

  • ANOTHER SOURCE GIVES CARAJAS RESERVES (1980) AS 44.44 MIL TONS AT 42.24% MN FOR AZUL, 12 MIL TONS AT 47% FOR BURITIRAMA, AND 3 MIL TONS AT 40% MN FOR SERENO, ORE TOTAL RESERVE AFTER CESAR.

Comments on development

  • NON-GEOLOGIC CONSTRAINTS ON DEVELOPMENT OR EXPANSION IN 1-5 YRS. ( TRANSPORT/ACCESS; MINE PLANT; PROCESSING; ENERGY;). DEVELOPMENT(YES); EXPLORATION(YES); ASSESSMENT(A-900 KM RAILROAD FROM THE COAST NEAR SAO LUIS, MARAHAO MUST BE COMPLETED TO SERVE THIS DISTRICT - PLANNED FOR COMPLETION 1986.); AVERAGE GRADE IS 40% MN, MN/FE = 10:1. THE CARAJAS DISTRICT ALSO CONTAINS THE BURITIRAMA AND SERENO DEPOSITS, BUT ONLY THE AZUL DEPOSITS ARE REPORTED IN THIS RECORD.

Reference information

Bibliographic references

  • Deposit

    NATIONAL MATERIALS ADVISORY BOARD, 1981, MANGANESE RESERVES AND RESOURCES OF THE WORLD AND THEIR INDUSTRIAL IMPLICATIONS: NMAB-374, NATIONAL ACADEMY OF SCIENCES, WASHINGTON, DC, P. 107-108. (L11,G2,C1,C3C4,C14,C18,RR1).

  • Deposit

    BERNARDELLI, A., 1982, INTERNATIONAL SYMPOSIUM ON ARCHAEAN AND EARLY PROTEROZOIC GEOLOGY, EVOLUTION AND METALLURGY, P. 62-66. (RR1)

  • Deposit

    DORR, J., 1970, IRON FORMATION AND ASSOCIATED MANGANESE IN BRAZIL IN GENESIS OF PRECAMBRIAN IRON AND MANGANESE DEPOSITS, PROCEEDINGS OF THE KIEV SYMPOSIUM, AUG. 1970, PARIS, UNESCO, P. 105-114.

  • Deposit

    SANTOS, DOS, B.A., 1980, GEOLOGIA E POTENCIAL MINERAL DE REGIAO DOS CARAJAS: DOCEGEO, RIO DE JANEIRO. (RR8)

  • 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

    MINING MAGAZINE, JAN. 1989, P. 45.

  • 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.

  • Other Database

    CIMRI

General comments

Subject category Comment text
Deposit THIS RECORD WAS COMPILED FOR THE INTERNATIONAL STRATEGIC MINERALS INVENTORY. THE DATA WERE USED IN PREPARATION OF THE USGS CIRCULAR 930 SERIES OF REPORTS. MINERAL RESOURCE CATEGORIES AND CODES HEREIN ARE FROM THE INTERNATIONAL CLASSIFICATION SYSTEM RECOMMENDED BY THE UNITED NATIONS GROUP OF EXPERTS ON DEFINITIONS AND TERMINOLOGY FOR MINERAL RESOURCES. (SEE NATIONAL RESOURCES FORUM, V. 4, NO. 3, P. 307-313.).

Reporter information

Type Date Name Affiliation Comment
Reporter 01-DEC-82 Cannon, William F. U.S. Geological Survey
Updater 01-SEP-89 Beougher, Dee (Spanski, Gregory T.) U.S. Geological Survey
Updater 01-JUL-92 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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