NDLI: Ordovician magmatism in the Lévézou massif (French Massif Central): tectonic and geodynamic implications

Content Provider	Springer Nature Link
Author	Lotout, Caroline Pitra, Pavel Poujol, Marc Den Driessche, Jean
Copyright Year	2016
Abstract	New U–Pb dating on zircon yielded ca. 470 Ma ages for the granitoids from the Lévézou massif in the southern French Massif Central. These new ages do not support the previous interpretation of these granitoids as syn-tectonic intrusions emplaced during the Late Devonian-Early Carboniferous thrusting. The geochemical and isotopic nature of this magmatism is linked to a major magmatic Ordovician event recorded throughout the European Variscan belt and related to extreme thinning of continental margins during a rifting event or a back-arc extension. The comparable isotopic signatures of these granitoids on each side of the eclogite-bearing leptyno-amphibolitic complex in the Lévézou massif, together with the fact that they were emplaced at the same time, strongly suggest that these granitoids were originally part of a single unit, tectonically duplicated by either isoclinal folding or thrusting during the Variscan tectonics.
Starting Page	501
Ending Page	515
Page Count	15
File Format	PDF
ISSN	14373254
Journal	International Journal of Earth Sciences
Volume Number	106
Issue Number	2
e-ISSN	14373262
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-08-13
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Variscan Orthogneiss Geochronology U/Pb Ordovician Geochemistry Geology Geophysics/Geodesy Sedimentology Structural Geology Mineral Resources
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences

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