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De la subduction continentale à l'exhumation dans les Alpes Penniques. Modélisations thermo-mécanique et paléogéographique.

Abstract : Classicaly, the Alps are described as typical collision mountain belt. However, PT and geochronological data show that major building processes in the Alps occured during subduction. The continental subduction induces burial and stacking of uppercrustal high-pressure units. 1D thermal and 2D thermomechanical models demonstrate that stacking is due to the heating from the top of the subducted lithosphere. Those models allow to quantitatively estimate the dip angle and the velocity of the subduction from PT data of stacked units during continental subduction. From these results, it is possible to quantitatively reconstruct a past slab geometry and kinematic which allow to strengthen a new exhumation process: extension due to slab rollback. Palaeogeographical models illustrate such an exhumation process and highligth exhumation and slab rollback synchronicity.
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https://tel.archives-ouvertes.fr/tel-00166220
Contributor : Isabelle Dubigeon <>
Submitted on : Thursday, August 2, 2007 - 8:54:29 AM
Last modification on : Thursday, January 14, 2021 - 11:38:25 AM
Long-term archiving on: : Monday, September 24, 2012 - 11:30:21 AM

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  • HAL Id : tel-00166220, version 1

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Nicolas Carry. De la subduction continentale à l'exhumation dans les Alpes Penniques. Modélisations thermo-mécanique et paléogéographique.. Autre. Université Rennes 1, 2007. Français. ⟨tel-00166220⟩

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