Dernière mise à jour le : 20 janvier 2016

The Cenozoic history of the Armorican Massif: New insights from the deep CDB1 borehole (Rennes Basin, France)

DESCRIPTION

Borehole CDB1 (675.05 m) crosses the deepest Cenozoic sedimentary basin of the Armorican Massif, the Rennes Basin, to reach the underlying basement at a depth of 404.92 m, made up of the Late Neoproterozoic to Early Cambrian Brioverian Group, weathered down to 520 m depth. The basin's Cenozoic deposits are divided into seven formations, ranging from Early–Middle Bartonian to Late Pliocene in age. Coastal sediments at the very base, along with a thick Priabonian lacustrine episode, imply a major revision of the regional palaeogeography, whilst a very steady and low-energy lacustrine-palustrine environment throughout the Priabonian and Early Rupelian argue for an aggradational system associated with uniform subsidence. Palynological assemblages attest to environmental and climatic changes through the Eocene and Early Oligocene, in accordance with regional and global trends (Eocene–Oligocene Transition).

NOTICE BIBLIOGRAPHIQUE DETAILLÉE

keyboard_arrow_right Titre : The Cenozoic history of the Armorican Massif: New insights from the deep CDB1 borehole (Rennes Basin, France)
keyboard_arrow_right Type de documentation : Articles
keyboard_arrow_right Auteur(s) personne(s) : Guillocheau François, Wyns Robert, Bourdillon Chantal, Châteauneuf Jean-Jacques, Saint-Marc Pierre, Bessin Paul, Bauer Hugues
keyboard_arrow_right Date de publication : 20 janvier 2016
keyboard_arrow_right Editeur(s) : Académie des sciences
keyboard_arrow_right Tags thématiques : changement climatique, bassin de sédimentation, sédiment, paléoécologie, paléoclimatologie
keyboard_arrow_right Mots-clés libres : EOT/Weathering profile/Continental drilling/Eocene/Oligocene/Cénozoïque/Cenozoic Rennes Basin/bassin cénozoïque de Rennes
keyboard_arrow_right Localisation : RENNES
keyboard_arrow_right Langue : Anglais
keyboard_arrow_right N° d'édition (ISBN,DOI...) : 10.1016/j.crte.2016.02.002
keyboard_arrow_right Collection : COMPTES RENDUS DE L'ACADEMIE DES SCIENCES (II). SCIENCES DE LA TERRE ET DES PLANETES

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