The carbonate rocks exposed in the Irecê (Brazil) are pervasively affected by hydrothermal silicification and dolomitization. These mineralizing events drastically changed the original petrophysical properties of the host rock. In order to understand the role played by deformation mechanisms and tectonic evolution of these carbonates on the ingression of the mineralizing fluids, we focused our study on the mineralogical, petrographic, stratigraphic, structural and geochemical characterization of the faulted Neoproterozoic carbonates of the Salitre Formation, central Brazil. In this contribution, we present the first results of a combined outcrop- to micro-scale investigation of the structural evolution of the fracture network responsible for hydrothermal silicification and dolomitization processes.

Hydrothermal silicification and dolomitization in fault system, Irecê Basin (Brazil) - implication for reservoir properties / la Bruna, V.; Bezerra, F.; Balsamo, F.; Menezes, C.; Bertotti, G.; Lamarche, J.; Richard, P.; Agosta, F.; Pontes, C.. - (2020), pp. 1-5. ((Intervento presentato al convegno 4th Naturally Fractured Reservoir Workshop 2020 tenutosi a are nel 2020 [10.3997/2214-4609.2020622009].

Hydrothermal silicification and dolomitization in fault system, Irecê Basin (Brazil) - implication for reservoir properties

Balsamo F.;
2020

Abstract

The carbonate rocks exposed in the Irecê (Brazil) are pervasively affected by hydrothermal silicification and dolomitization. These mineralizing events drastically changed the original petrophysical properties of the host rock. In order to understand the role played by deformation mechanisms and tectonic evolution of these carbonates on the ingression of the mineralizing fluids, we focused our study on the mineralogical, petrographic, stratigraphic, structural and geochemical characterization of the faulted Neoproterozoic carbonates of the Salitre Formation, central Brazil. In this contribution, we present the first results of a combined outcrop- to micro-scale investigation of the structural evolution of the fracture network responsible for hydrothermal silicification and dolomitization processes.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11381/2888258
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