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<title lang=en>Impact of gravity forces and topography denudation on normal faulting in Central-Western Pyrenees: Insights from 2D numerical models</title>
<creator>GENTI, Manon</creator>
<creator>CHERY, Jean</creator>
<creator>VERNANT, Philippe</creator>
<creator>Rigo, Alexis</creator>
<contributor>Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Risques ; Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS) - Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Laboratoire de géologie de l'ENS (LGE) ; École normale supérieure - Paris (ENS Paris) - Institut national des sciences de l'Univers (INSU - CNRS) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>2014 ALEA program of INSU-CNRS</contributor>
<source>ISSN: 1631-0713</source>
<source>Comptes Rendus Géoscience</source>
<publisher>Elsevier Masson</publisher>
<identifier>hal-01346028</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01346028</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01346028/document</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01346028/file/Genti.pdf</identifier>
<source>https://hal.archives-ouvertes.fr/hal-01346028</source>
<source>Comptes Rendus Géoscience, Elsevier Masson, 2016, 348 (3-4), pp.173-183. 〈10.1016/j.crte.2015.08.004〉</source>
<identifier>DOI : 10.1016/j.crte.2015.08.004</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1016/j.crte.2015.08.004</relation>
<language>en</language>
<subject lang=en>Central-Western Pyrenees</subject>
<subject lang=en>Normal faulting</subject>
<subject lang=en>Numerical modelling</subject>
<subject lang=en>Surface processes</subject>
<subject lang=en>Isotactic rebound</subject>
<subject lang=en>Kostrov summation</subject>
<subject>[SDU.STU.GP] Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph]</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>Normal faulting mechanisms observed in the northern foothills of the Central–Western Pyrenees are remarkable, since one expects thrust faults at a convergent plate boundary. To understand the mechanisms involved, we used numerical modeling and investigated the impact of the following processes: gravitational potential energy associated with topography and dense crustal blocks; isostatic compensation in response to denudation and/or sedimentation. To decipher the effects of each process, we designed three model geometries and added a pre-existing weak fault where most of the seismicity occurs. To evaluate our model results, we derived the fault slip rate from the focal mechanisms in the region where we have the fault in our model. We found a slip rate of ∼15 m/Ma, which is in agreement with our modelling results. We conclude that flexural rebound induced by surface processes is able to explain the seismicity in Central–Western Pyrenees.</description>
<date>2016</date>
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