International Journal of Earth Sciences

, Volume 106, Issue 2, pp 501–515 | Cite as

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

  • Caroline Lotout
  • Pavel Pitra
  • Marc Poujol
  • Jean Van Den Driessche
Original Paper


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.


Variscan Orthogneiss Geochronology U/Pb Ordovician Geochemistry 



We sincerely thank X. Le Coz and Y. Lepagnot for the sample preparation, J. Langlade for the assistance with microprobe analysis, and D. Vilbert for the Sm/Nd and Sr isotopic analysis. V. Janoušek and P. Boulvais are thanked for helpful discussions about the whole-rock and isotopic geochemistry. Constructive reviews of P. Jeřábek and J.M. Lardeaux helped to improve the manuscript.

Supplementary material

531_2016_1387_MOESM1_ESM.docx (16 kb)
Supplementary material 1 (DOCX 15 kb)
531_2016_1387_MOESM2_ESM.xlsx (114 kb)
Supplementary material 2 (XLSX 113 kb)


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Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Caroline Lotout
    • 1
  • Pavel Pitra
    • 1
    • 2
  • Marc Poujol
    • 1
  • Jean Van Den Driessche
    • 1
  1. 1.UMR CNRS 6118, Géosciences RennesOSURRennes CedexFrance
  2. 2.Česká Geologická SlužbaPrague 1Czech Republic

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