globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2013.02.035
论文题名:
Paleohydrological and paleoenvironmental changes recorded in terrestrial sediments of the Paleocene-Eocene boundary (Normandy, France)
作者: Garel S.; Schnyder J.; Jacob J.; Dupuis C.; Boussafir M.; Le Milbeau C.; Storme J.-Y.; Iakovleva A.I.; Yans J.; Baudin F.; Fléhoc C.; Quesnel F.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 376
起始页码: 184
结束页码: 199
语种: 英语
英文关键词: Carbon isotopes ; Continental ecosystems ; Dieppe-Hampshire Basin ; Hydrogen isotopes ; Paleoenvironments ; Paleohydrology ; PETM
英文摘要: 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.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69765
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作者单位: 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; Laboratoire de Géologie Fondamentale et Appliquée, Faculté Polytechnique de Mons, Université de Mons, rue de Houdain 9, B-7000 Mons, Belgium; FUNDP, Namur, Department of Geology, 61 rue de Bruxelles, 5000 Namur, Belgium; Geological Institute, Russian Academy of Sciences, 109017 Moscow, Russian Federation; BRGM LAB/ISO, 45060 Orléans Cedex 2, France

Recommended Citation:
Garel S.,Schnyder J.,Jacob J.,et al. Paleohydrological and paleoenvironmental changes recorded in terrestrial sediments of the Paleocene-Eocene boundary (Normandy, France)[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,376
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