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The Banded Iron Formation (BIFs) of the Cauê Formation, Quadrilátero Ferrífero, Brazil, are part of the great volume of BIFs deposited worldwide around 2.45Ga. Samples of carbonate (ankerite/dolomite) BIF from this unit were collected from a drill core ca. 600m deep in the Alegria region. Geochemical data suggest low clastic contamination (Y/Ho=37.7) and seawater-like signatures, with positive La...
The BIF-hosted iron ore system represents the world's largest and highest grade iron ore districts and deposits. BIF, the precursor to low- and high-grade BIF hosted iron ore, consists of Archean and Paleoproterozoic Algoma-type BIF (e.g., Serra Norte iron ore district in the Carajás Mineral Province), Proterozoic Lake Superior-type BIF (e.g., deposits in the Hamersley Province and craton), and Neoproterozoic...
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