Coniacian-Campanian palynology, carbon isotopes and clay mineralogy of the Poigny borehole (Paris Basin) and its correlation in NW Europe - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Comptes Rendus. Géoscience Année : 2022

Coniacian-Campanian palynology, carbon isotopes and clay mineralogy of the Poigny borehole (Paris Basin) and its correlation in NW Europe

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The Poigny borehole near Provins (Seine-et-Marne) provides the most complete single pristine section through the Upper Cretaceous Chalk of the Paris Basin. A well preserved and diverse palynoflora including 236 species and subspecies of organic-walled dinoflagellate cysts (dinocysts) is documented from the borehole, together with a high-resolution carbon-isotope curve (delta C-13(carb)) for the Coniacian-Campanian interval. Integration of the palynological and delta C-13(carb) data provides a basis for a chemostratigraphic and biostratigraphic correlation to England and Germany. Carbon isotope events (CIEs) are used to refine the placement of sub-stage boundaries in the core, and to calibrate and correlate distinctive palynological events with those from other European sections. Thirty-three palynological events in the upper Coniacian-Campanian, judged to be of biostratigraphic significance, are described. Palynological assemblages, the peridinioid/gonyaulacoid (P/G) dinocyst ratio and clay mineralogy are compared to depositional sequences and implicate sea-level as a major driver of palaeoenvironmental change.
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hal-04122244 , version 1 (08-06-2023)

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Martin A. Pearce, Ian Jarvis, Johannes Monkenbusch, Nicolas Thibault, Clemens V. Ullmann, et al.. Coniacian-Campanian palynology, carbon isotopes and clay mineralogy of the Poigny borehole (Paris Basin) and its correlation in NW Europe. Comptes Rendus. Géoscience, 2022, 354, pp.45-65. ⟨10.5802/crgeos.118⟩. ⟨hal-04122244⟩
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