LE POURHIET , Laetitia

The classical interseismic mechanical models of the lithosphere assume that the earth's lithosphere is a horizontally layered medium. Recent, more sophisticated models include lateral variations of physical parameters and are shown to be as effective, and sometimes more, at reproducing the geodetic data during the seismic cycle than the...

In this paper we describe a computational methodology that is specifically designed for studying three-dimensional geodynamic processes governed by heterogeneous visco-plastic Stokes flow. The method employs a hybrid spatial discretization consisting of a View the MathML sourceQ2-P1disc mixed finite element formulation for the Stokes problem,...

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Evolving mountain belts dynamics is very sensitive to surface processes. The surface processes affect tectonics by enhancing crust exhumation and thermal weakening, and depositing soft yet cold sediments in surrounding basins. While 2D plane strain models approximate cylindrical tectonic structures well, simple 1D mass transfer cannot capture...

We analyse Bouguer anomaly data and previously published Moho depths estimated from receiver functions in order to determine the amount of isostatic compensation or uncompensa-tion of the Rif topography in northern Morocco. We use Moho depth variations extracted from receiver function analyses to predict synthetic Bouguer anomalies that are...

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Subduction erosion, commonly occurring in convergent margins, serves as a key mechanism for effective recycling of materials into the deep subduction. Subduction of bathymetric highs is widely recognized as a critical factor of subduction erosion of the forearc. The Mariana margin is an often-cited example of a tectonically erosive zone, with...

Le but de cette contribution est de documenter et comprendre à la foisla cinématique des déformations collisionelles à l'échelle des Alpes externesoccidentales et le rôle de la structure de la marge européenne danscette structuration orogénique.Dans un premier temps, nous présentons des données nouvelles, structurales,microstructurales et...

We explored the submarine portions of the Enriquillo-Plantain-Garden Fault zone (EPGFZ) and the Septentrional-Oriente Fault zone (SOFZ) along the Northern Caribbean plate boundary using high-resolution multi-beam echo-sounding and shallow seismic reflection. The bathymetric data shed light on poorly documented or previously unknown submarine...