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Brazil
Mariana Complex (Alegria | Germano Mine) (Southeastern System)

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 Location:
19 km N from Mariana, Brazil

  Address:
Praia de Botafogo 186 – offices 701-1901
Rio de Janeiro
Brazil
22250-145
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WebsiteWeb
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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Iron Ore
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life2038
Mariana complex includes Alegria, Fábrica Nova and Fazendão mines and Capanema project.


Owners

Source: p. 47
CompanyInterestOwnership
Vale S.A. 100 % Indirect

Contractors

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Deposit Type

  • Banded iron formation


Summary:

The Southeastern System mines are located in the Quadrilatero Femfero (Iron Quadrangle).

Ore reserves with high ratios of itabirite ore relative to hematite ore type. Itabirite ore has iron grade of 35-60%.

The Quadrilátero Ferrífero (QF) comprises an area of about 7000 km2 and hosts one of the largest concentrations of lateritic iron-ore deposits in the world. The QF is located in central Minas Gerais state, southeastern region of Brazil (Dorr, 1965). The QF has a quadrangular shape due to the dome and basin structures of the Minas Supergroup (Fig. 1). Most of the iron ore in the QF are hosted in the oxidized, metamorphosed and heterogeneously deformed Banded Iron Formations (BIFs) of the Cauê Formation, the so-called itabirites. The BIFs are altered sedimentary deposits with laminated rocks formed by alternating layers of silica and hematite magnetite, as well as carbonates and iron silicates.

The Quadrilátero Ferrífero is located at the southeastern border of the São Francisco Craton, southeastern Brazil (Fig. 1). According to Alkmim and Marshak (1998) the most important lithostratigraphic units of the Quadrilátero Ferrífero are: (1) the Archean crystalline basement, (2) the Rio das Velhas Supergroup, (3) the Minas Supergroup, (4) the Post-Minas Intrusives and (5) the Itacolomi Group.

Basement crystalline rocks include a gneiss/migmatite complex and two generations of voluminous Late Archean plutons: calk-alkaline and anorogenic ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

Mariana mining complex is located at Iron Quadrangle region, State of Minas Gerais in Brazil and comprises three mines (Alegria, Fabrica Nova and Fazend´ao), with three major beneficiation plants.

Open pit mining is conducted via conventional truck and shovel mining method. Extracted ore has a high ratios of itabirite ore relative to hematite ore type. Itabirite ore type has iron grade of 35-60%. Part of the ore is concentrated to achieve shipping grade and part is shipped and blended in Asia with the high-grade ore from our Northern System.


Crushing and Grinding


Processing

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Summary:

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Production:

CommodityUnits2021202020192018201720162015
Iron Ore kt  ......  Subscription required  ......  Subscription required  ......  Subscription required26,70033,10028,40035,900
All production numbers are expressed as concentrate.
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Reserves at December 31, 2021:

CategoryTonnage CommodityGrade
Proven 110 Mt Iron 54.6 %
Probable 359.4 Mt Iron 57.5 %
Proven & Probable 469.4 Mt Iron 56.8 %
Measured 2,555 Mt Iron 41.7 %
Indicated 2,047 Mt Iron 40.2 %
Measured & Indicated 4,601 Mt Iron 41 %
Inferred 2,275 Mt Iron 39.1 %


Pipelines
TypeMaterialDiameterLengthDescription


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jun 6, 2022
....................... Subscription required ....................... Subscription required Subscription required Jun 6, 2022
....................... Subscription required ....................... Subscription required Subscription required Jun 6, 2022
....................... Subscription required ....................... Subscription required Subscription required Jun 6, 2022
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Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
Form 20-F 2018
Form 20-F 2017
Form 20-F 2016
Form 20-F 2015
Annual Report 2014
Other 2014
Technical Report 2009
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