The Palaeocene/Eocene boundary section at Zumaia (Basque-Cantabric Basin) revisited: New insights from high-resolution magnetic susceptibility and carbon isotope chemostratigraphy on organic matter (δ 13C org)

Jean Yves Storme, Xavier Devleeschouwer, Johann Schnyder, Geoffrey Cambier, Juan Ignacio Baceta, Victoriano Pujalte, Antonietta Di Matteo, Paola Iacumin, Johan Yans

    Résultats de recherche: Contribution à un journal/une revueArticleRevue par des pairs

    Résumé

    The Zumaia section, the most complete and representative section of the early Palaeogene (hemi)-pelagic succession of the Pyrenees, is widely acknowledged as a key reference for the Palaeocene-Eocene boundary. New high-resolution δ 13C org of the Zumaia section (-23.8 to -28.8‰) confirms the position of the Carbon Isotope Excursion and enhances the distinction between the different steps of the CIE/PETM event. According to new magnetic susceptibility data and detailed cycle counting, the entire duration of the CIE/PETM in Zumaia is estimated in ∼168±16ka. Moreover, the investigation of palynofacies and low-field magnetic susceptibility reveal significant detrital influx during the interval. Several magnetic susceptibility phases and trends are recognised and are interpreted in terms of sea-level fluctuations before, during and after the PETM. Coupled with results from other sections, our data reveal the presence of an unconformity followed by an eustatic sea-level rise (TST) in the latest Palaeocene.

    langue originaleAnglais
    Pages (de - à)310-317
    Nombre de pages8
    journalTerra Nova
    Volume24
    Numéro de publication4
    Les DOIs
    Etat de la publicationPublié - 1 août 2012

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