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

Conference paper (2020)

Authors

V. La Bruna Universidade Federal do Rio Grande do Norte
Francisco H.R. Bezerra Universidade Federal do Rio Grande do Norte
Fabrizio Balsamo University of Parma
C. Menezes Universidade Federal do Rio Grande do Norte
G. Bertotti Applied Geology - CEG
J. Lamarche Aix Marseille Université
P. Richard Shell Global Solutions International B.V.
F. Agosta Universita degli Studi della Basilicata
Cayo C.C. Pontes Universidade Federal do Rio Grande do Norte
Research Group
Applied Geology (CEG) (TU Delft)
Copyright: © 2020 V. la Bruna, F. Bezerra, F. Balsamo, C. Menezes, G. Bertotti, J. Lamarche, P. Richard, F. Agosta, C. Pontes
DOI
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https://doi.org/10.3997/2214-4609.2020622009
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Published Date

2020

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Geoscience and Engineering

Research Group

Applied Geology

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.