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Origine et modification des cycles stratigraphiques à haute-fréquence (10's à 100's ka). Rôle des déformations courte longueur et modélisation du comportement des systèmes fluviatiles

Abstract : Detrital accummulations are always composed of stratigraphic cycles at a large range of time scales (0.01-100 Ma), linked to variations of the ratio between available space to sedimentation (accommodation) and sediment supply due to tectonics and climate. What are the respective contributions of each of these factors in the origin and expression of the cycles, in particular at high-frequency (10-100 ka) where they can all play a role? If regional and global accommodation variations (tectonics and climate) at these frequencies are largely admitted as a dominant origin, (1) the influence of intra-basin tectonic structures (folds and faults) on the expression of stratigraphic cycles, and (2) the controls on high-frequency sediment supply, are less well constrained. This work adresses both aspects through the sedimentological study of a growth anticline, and the numerical modelling of rivers and their control on sediment supply variations at the entrance of sedimentary basins.
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https://tel.archives-ouvertes.fr/tel-00003936
Contributor : Alain-Hervé Le Gall <>
Submitted on : Wednesday, December 10, 2003 - 2:40:24 PM
Last modification on : Thursday, January 14, 2021 - 11:42:52 AM
Long-term archiving on: : Wednesday, March 29, 2017 - 10:36:17 AM

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  • HAL Id : tel-00003936, version 2

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Sébastien Castelltort. Origine et modification des cycles stratigraphiques à haute-fréquence (10's à 100's ka). Rôle des déformations courte longueur et modélisation du comportement des systèmes fluviatiles. Minéralogie. Université Rennes 1, 2003. Français. ⟨tel-00003936v2⟩

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