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Formation and reactivation of the Pyrenean-Cantabrian rift system : inheritance, segmentation and thermal evolution

Abstract : This study aims to describe the role of rift-inheritance and segmentation for reactivation and to investigate the influence of asymmetric rifting on the syn-rift thermal evolution, using the Pyrenean-Cantabrian system as a natural laboratory. The study of the Pyrenean-Cantabrian junction discards the existence of a Pamplona transform fault between the two rift segments and argues for an accommodation zone where rift segments overlap north and south of the Basque massifs in relation with north-south direction of extension. During convergence, rift segmentation and the Triassic evaporite decoupling horizon controlled the reactivation and the local orogenic architecture. Finally, this study shows that asymmetric hyperextension is associated with asymmetric and diachronous thermal evolution, and highlights the importance of understanding the tectonic evolution to define the thermal architecture.
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https://tel.archives-ouvertes.fr/tel-02312419
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Submitted on : Friday, October 11, 2019 - 11:05:08 AM
Last modification on : Friday, February 5, 2021 - 2:08:04 PM

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Rodolphe Lescoutre. Formation and reactivation of the Pyrenean-Cantabrian rift system : inheritance, segmentation and thermal evolution. Earth Sciences. Université de Strasbourg, 2019. English. ⟨NNT : 2019STRAH003⟩. ⟨tel-02312419⟩

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