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LES SEDIMENTS FINS DANS UN SYSTEME MACROTIDAL ACTUEL (CONTINUUM SEINE-BAIE DE SEINE) : caractérisations géochimiques et minéralogiques, identification des sources

Abstract : In the macrotidal Seine estuary where growing mud deposits occurred in the mouth and in the bay of Seine, the identification and quantification of sources of fine material have been undertaken on three hundred superficial samples using particulate markers. A great "chemical and mineralogical identity card" of muddy sediments in the continuum Seine-bay of the Seine contributes new information on: dilution of fine material in the bay of the Seine, penetration of marine fine-grained sediments in the estuary and in the small rivers adjacent to the bay, and local and punctual fossil contribution.
The determination of particulate mixing (PCA, mixing equations) shows that the recent fine sedimentation is the composite mixing of four sources (marine, riverine, fossil, estuarine) at long time scale (several decades). The mixing is more complex at short time scale (seasonal, instantaneous), with the input of secondary sources.
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https://tel.archives-ouvertes.fr/tel-00214127
Contributor : Carole Dubrulle-Brunaud <>
Submitted on : Wednesday, January 23, 2008 - 2:07:47 PM
Last modification on : Tuesday, June 23, 2020 - 10:10:03 AM
Long-term archiving on: : Thursday, April 15, 2010 - 12:31:11 AM

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  • HAL Id : tel-00214127, version 1

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Carole Dubrulle-Brunaud. LES SEDIMENTS FINS DANS UN SYSTEME MACROTIDAL ACTUEL (CONTINUUM SEINE-BAIE DE SEINE) : caractérisations géochimiques et minéralogiques, identification des sources. Géologie appliquée. Université de Rouen, 2007. Français. ⟨tel-00214127⟩

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