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<title lang=en>Petrology and geochronology of the high-K calc-alkaline Mésanger magmatism (Armorican massif, France): a ca. 320 Ma old volcano-plutonic association</title>
<creator>Ducassou, Céline</creator>
<creator>Poujol, Marc</creator>
<creator>Hallot, Erwan</creator>
<creator>Bruguier, Olivier</creator>
<creator>Ballevre, Michel</creator>
<contributor>Terre, Temps, Traçage ; Géosciences Rennes (GR) ; Université de Rennes 1 (UR1) - Institut national des sciences de l'Univers (INSU - CNRS) - Centre Armoricain de Recherches en Environnement - Centre National de la Recherche Scientifique (CNRS) - Université de Rennes 1 (UR1) - Institut national des sciences de l'Univers (INSU - CNRS) - Centre Armoricain de Recherches en Environnement - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<description>International audience</description>
<source>Bulletin de la Socciété Géologique de France</source>
<identifier>insu-00656606</identifier>
<identifier>https://hal-insu.archives-ouvertes.fr/insu-00656606</identifier>
<source>https://hal-insu.archives-ouvertes.fr/insu-00656606</source>
<source>Bulletin de la Socciété Géologique de France, 2011, 182 (6), pp.467-477</source>
<language>en</language>
<subject lang=fr>Variscan</subject>
<subject lang=fr>Granite</subject>
<subject lang=fr>U/Pb on zircons</subject>
<subject lang=fr>Carboniferous</subject>
<subject>[SDU.STU.GC] Sciences of the Universe [physics]/Earth Sciences/Geochemistry</subject>
<subject>[SDE.MCG] Environmental Sciences/Global Changes</subject>
<subject>[SDU.STU.PE] Sciences of the Universe [physics]/Earth Sciences/Petrography</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>The late stages of the Variscan orogeny in western and central Europe are characterized by the emplacement of numerous Carboniferous granitic intrusions. In the southern part of the Armorican massif, volcanic and plutonic rocks occur within the Carboniferous series of the Ancenis basin. Chemical analyses indicate that they belong to the same magmatic high-K calc-alkaline association of peraluminous composition, which likely derives from crustal melting of an igneous source. A LA-ICPMS U-Pb/zircon age of 319.3 ± 3.1 Ma dates, for the first time, this magmatic event and, by there, constrains the maximum age of both the end of the sedimentation and the northward tilting of the sediments in the Ancenis basin. This magmatic event is coeval with the sedimentation of the coal-bearing Namurian basins located along the Nort-sur-Erdre fault. These intrusions are interpreted as the feeding conduits of the volcano-sedimentary layers encountered in these basins. This would imply a minimal dextral displacement of ca. 20-25 km along the Nort-sur-Erdre fault.</description>
<date>2011</date>
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