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Interactions entre tectonique et érosion à différentes échelles spatio-temporelles en Himalaya : Apport de la modélisation numérique

Abstract : This thesis studies the interactions between tectonics and erosion in the Himalayas at three different spatial and temporal scales using numerical modelling. We show that: At the scale of a single fold, drainage diversion in response to a growing structure is controlled by the relative efficiency of tectonic and erosional processes, but also and mostly by the dip of the detachment underlying the structure; At the scale of the fold and thrust belt, the dynamics and evolution of the wedge is strongly dependent on surface processes, especially river incision. In some cases where erosion is particularly efficient, frontal propagation of the wedge is impossible; At the crustal scale, the deformation and material fluxes, which control the characteristics of the rocks that are exhumed in the Himalayan system, are strongly dependent on precipitation patterns (localisation and intensity) and on the presence or absence of proximal sedimentation.
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https://tel.archives-ouvertes.fr/tel-00010315
Contributor : Peter van der Beek <>
Submitted on : Friday, September 30, 2005 - 2:33:01 PM
Last modification on : Thursday, November 19, 2020 - 3:54:26 PM
Long-term archiving on: : Friday, April 2, 2010 - 10:20:36 PM

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  • HAL Id : tel-00010315, version 1

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Bénédicte Duffait-Champel. Interactions entre tectonique et érosion à différentes échelles spatio-temporelles en Himalaya : Apport de la modélisation numérique. Géologie appliquée. Université Joseph-Fourier - Grenoble I, 2004. Français. ⟨tel-00010315⟩

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