Quadrilátero Ferrífero and Hamersley Province: so far apart and yet so close to each other.

AUTHORS: Rosière, C.A., Barley, M.E., Hagemann, S.G., Suckau, V.E.

ABSTRACT: The stratigraphic and tectonic evolution of the Minas and Hamersley Basins were similar, particularly during the late Archaean/Palaeoproterozoic time period, with the extensive sedimentation and formation of banded iron formations in shallow to deep platformal environment and associated with volcanic centers. Both present similar tectonic architectures of a fold belt, formed at relative shallow crustal conditions, followed by the development of domal structures of still uncertain origin and formation mechanism. The deformation created new and activated older discontinuities, that conducted mineralizing fluids. to localized low strain (strain shadows), thereby producing haematite veins, mullion-shaped and concordant high-grade ore bodies.

KEYWORDS: Quadrilátero Ferrífero, Hamersley Province, BIF, Iron Mineralization EAN: SGA_2007_A009
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