The main Carajás iron ore deposits are associated with flat-topped elevated plateaus, in general, elevated areas, between 650-800 meters, defined along two main morphological alignments corresponding to Serra Norte and Serra Sul. These alignments materialize the limbs of the Carajás Syncline. The Serra Sul Complex corresponds to the normal limb domain of the Carajás Syncline, characterized by a lower degree of deformation when compared to the inverse limb, which is reflected in the greater continuity of the iron formations. Mineralization The mineralization at Serra Sul is mainly formed from alteration on jaspillites, which constitutes the Carajás ore protolith. The high-grade ore consists of friable hematite, compact hematite, and manganese hematite, which occur in a sub-horizontal tabular layer, which tends to follow the topographical surface, commonly covered by a canga carapace, also considered a mineralized lithotype. Friable hematite (HF) accounts for about 85% of the mineralization. It is essentially composed of hematite, with irregular masses of magnetite, goethite, and limonite inherited from the jaspillitic ore protolith, in addition to kaolin and clay minerals, which occur more locally, from the alteration of volcanic rocks. HF occurs from near the surface to depths greater than 450 m and presents average Fe grades around 68.8%, with relatively low levels of phosphorus, silica, alumina, and loss on ignition. Loss on ignition and phosphorus are generally associa ........

The Serra Sul Mining Complex is located in the north of Brazil. The property consists of orebody S11, subdivided on A, B, C, and D. Current production activities are in the S11D mine and the mineral reserves and mineral resources are defined only for the orebodies C and D.

Serra Sul has mined by open pit with berms and benches and uses large truck, shovel equipment and also In Pit Crusher Conveyor (IPCC) mining method.

The mine design includes benches 15 m high, berms 15 m wide, bench face angles from 50 to 85 degrees, according to the lithology in the mine. Ramp access is 40m width with 10% gradient.

The mining method at Serra Sul is open pit. Materials that require drilling and blasting and whose geometry does not favor to IPCC, are mined by normal truck and shovel, otherwise IPCC mining method is applied.

The movement of material is done by electric cable and/or hydraulic excavators into mobile crushers. The mobile crushing plants are equipped with a “sizer” (friable materials) or jaws crushers (compact material). Once the particle is reduced to the appropriate size for the conveyor belt, both the ore and the waste are sent to a transfer house where the conveyors are provided with a mobile head and adjust to transfer the ore onto a belt that takes it to a stockpile and the waste to another belt that sends to spreaders, which build the waste dumps.

Production is carried out by the company´s mine personnel, while contra ........

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