Reference : Paleohydrological and paleoenvironmental changes recorded in terrestrial sediments of...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
http://hdl.handle.net/2268/172071
Paleohydrological and paleoenvironmental changes recorded in terrestrial sediments of the Paleocene-Eocene boundary (Normandy, France)
English
Garel, S. [UPMC Université Paris 06/CNRS, UMR 7193 ISTeP, 4 place Jussieu, 75005 Paris, France, Université d'Orléans, ISTO, UMR 7327, 45071 Orléans, France, CNRS/INSU, ISTO, UMR 7327, 45071 Orléans, France, BRGM, ISTO, UMR 7327, BP 36009, 45060 Orléans, France, BRGM GéoRessources/GAT, 45060 Orléans Cedex 2, France]
Schnyder, J. [UPMC Université Paris 06/CNRS, UMR 7193 ISTeP, 4 place Jussieu, 75005 Paris, France]
Jacob, J. [Université d'Orléans, ISTO, UMR 7327, 45071 Orléans, France, CNRS/INSU, ISTO, UMR 7327, 45071 Orléans, France, BRGM, ISTO, UMR 7327, BP 36009, 45060 Orléans, France]
Dupuis, C. [Laboratoire de Géologie Fondamentale et Appliquée, Faculté Polytechnique de Mons, Université de Mons, rue de Houdain 9, B-7000 Mons, Belgium]
Boussafir, M. [Université d'Orléans, ISTO, UMR 7327, 45071 Orléans, France, CNRS/INSU, ISTO, UMR 7327, 45071 Orléans, France, BRGM, ISTO, UMR 7327, BP 36009, 45060 Orléans, France]
Le Milbeau, C. [Université d'Orléans, ISTO, UMR 7327, 45071 Orléans, France, CNRS/INSU, ISTO, UMR 7327, 45071 Orléans, France, BRGM, ISTO, UMR 7327, BP 36009, 45060 Orléans, France]
Storme, Jean-Yves [Université de Liège - ULiège > > >]
Iakovleva, A. I. [Geological Institute, Russian Academy of Sciences, 109017 Moscow, Russian Federation]
Yans, J. [FUNDP, Namur, Department of Geology, 61 rue de Bruxelles, 5000 Namur, Belgium]
Baudin, F. [UPMC Université Paris 06/CNRS, UMR 7193 ISTeP, 4 place Jussieu, 75005 Paris, France]
Fléhoc, C. [BRGM LAB/ISO, 45060 Orléans Cedex 2, France]
Quesnel, F. [BRGM, ISTO, UMR 7327, BP 36009, 45060 Orléans, France, BRGM GéoRessources/GAT, 45060 Orléans Cedex 2, France]
2013
Palaeogeography, Palaeoclimatology, Palaeoecology
Elsevier Science
376
184-199
Yes (verified by ORBi)
International
0031-0182
1872-616X
Amsterdam
The Netherlands
[en] Carbon isotopes ; Continental ecosystems ; Dieppe-Hampshire Basin ; Hydrogen isotopes ; Paleoenvironments ; Paleohydrology ; PETM ; Hypsithermal ; Paleocene-Eocene boundary ; France ; Normandy ; Embryophyta ; Tracheophyta
[en] The Paleocene-Eocene boundary (55.8. Ma) is associated with the Paleocene-Eocene Thermal Maximum (PETM), which is characterized by a negative Carbon Isotope Excursion (CIE), reflecting a major perturbation of the carbon cycle, and by an extreme and rapid global warming. The Cap d'Ailly area (Upper Normandy, France), in which previous studies have revealed the Paleocene-Eocene transition, is a reference locality for organic-rich terrestrial and lagoonal deposits of the "Sparnacian" stage, widespread in Northwestern Europe. In this study, we focus on the organic matter content of the Vasterival section. Organic data (Rock-Eval, palynofacies, biomarker analyses and compound specific isotope analyses) were acquired in order to constrain the paleoenvironmental and paleohydrological changes that occurred at the Paleocene-Eocene boundary. Stable carbon isotope compositions of higher plant leaf wax n-alkanes reveal a CIE of - 4.5‰, extending throughout the second half of the studied section. Palynofacies observations reveal: (i) an abrupt shift from a closed, quiescent marsh pond to an open eutrophic swamp subjected to algal blooms, concomitant with the onset of the CIE; and (ii) the evolution from a swamp to a tidal flat due to the marine transgression that occurred during the PETM. Higher plant biomarkers and their hydrogen isotopic composition compared to nitrogen analyses suggest: (i) dry episodes just before the PETM that may help to understand the triggering of this hyperthermal event; and (ii) a moister climate associated with a stronger seasonality during the early PETM.© 2013 ElsevierB.V.
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/172071
10.1016/j.palaeo.2013.02.035

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