Implications of paleomagnetic results from the Permian Rodez basin for the late Variscan tectonics in the southern French massif Central.

Arturo Diego-Orozco (1, 2) , Yan Chen (3) , Bernard Henry (4) , Jean-François Becq-Giraudon (5)

1 IPGP - Institut de Physique du Globe de Paris
2 IMP - Instituto Mexicano del Petróleo
3 ISTO - Institut des Sciences de la Terre d'Orléans
4 LGP - Laboratoire de Géomagnétisme et Paléomagnétisme
5 BRGM - Bureau de Recherches Géologiques et Minières (BRGM)

A paleomagnetic study has been carried out on three sedimentary formations of the Permian Rodez basin in the southern France. Two of them yield paleomagnetic poles of Saxonian and Thuringian age showing counterclockwise rotation of moderate amplitude, during or after the Thuringian deposition. For the French Massif Central, contrary to its stable southern (Lodève basin) and eastern (Largentière basin) borders, on its southwestern border, in a large area including the Rodez, Saint-Affrique and perhaps Brive basins suffered rotations due to the extensional tectonics during the Late Variscan period.

Keywords: Paleomagnetism; Rotations; Variscan; Tectonics

Domains: Tectonics

Arturo Diego-Orozco, Yan Chen, Bernard Henry, Jean-François Becq-Giraudon. Implications of paleomagnetic results from the Permian Rodez basin for the late Variscan tectonics in the southern French massif Central.. Geodinamica Acta, 2002, 15, pp.249-260. ⟨10.1016/S0985-3111(02)01091-4⟩. ⟨hal-00076894⟩