Chronology of thrust propagation from an updated tectonosedimentary framework of the Miocene molasse (western Alps)

Amir Kalifi (1) , Philippe Hervé Leloup (1) , Philippe Sorrel (1) , Albert Galy (2) , François Demory (3) , Vincenzo Spina (4) , Bastien Huet (4) , Frédéric Quillévéré (1) , Frédéric Ricciardi (4) , Daniel Michoux (4) , Kilian Lecacheur (1) , Romain Grime (1) , Bernard Pittet (1) , Jean-Loup Rubino (4)

1 LGL-TPE - Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement
2 CRPG - Centre de Recherches Pétrographiques et Géochimiques
3 CEREGE - Centre européen de recherche et d'enseignement des géosciences de l'environnement
4 TOTAL S.A.

After more than a century of research, the chronology of the deformation of the external part of the western Alpine belt (France) is still controversial for the Miocene epoch. In particular, the poor dating of the foreland basin sedimentary succession hampers a comprehensive understanding of the deformation kinematics. Here we focus on the Miocene Molasse deposits of the northern subalpine massifs, southern Jura, Royans, Bas-Dauphiné, Crest and La Bresse sedimentary basins through a multidisciplinary approach to build a basin-wide tectono-stratigraphic framework. Based on sequence stratigraphy constrained by biostratigraphical, chemostratigraphical (Sr-isotopes) and magnetostratigraphical data between the late Aquitanian (~21 Ma) and the Tortonian (~8.2 Ma), the Miocene Molasse chronostratigraphy is revised with a precision of ~0.5

Domaines: Planète et Univers [physics]

Amir Kalifi, Philippe Hervé Leloup, Philippe Sorrel, Albert Galy, François Demory, et al.. Chronology of thrust propagation from an updated tectonosedimentary framework of the Miocene molasse (western Alps). Solid Earth, 2021, 12 (12), pp.2735-2771. ⟨10.5194/se-12-2735-2021⟩. ⟨hal-03534316⟩