Pyrenean deformations in the Bay of Biscay - Déformations pyrénéennes dans le Golfe de Gascogne

Isabelle Thinon (1) , Luis Fidalgo-González (2, 3) , Jean-Pierre Réhault (2) , Jean-Louis Olivet (3)

1 LPGN - Laboratoire de Planétologie et Géodynamique de Nantes [UMR 6112]
2 LDO - Domaines Océaniques
3 GM - Unité Géosciences Marines

A detailed cartography of the maximal Pyrenean deformation dated from Eocene has been made for the northern Bay of Biscay from the interpretation of new reflection seismic data. These new seismic images confirm the occurrence of a primary tectonic event for the Pyrenean phases. This event would underline the initialisation of the Iberia/Europe convergence. The Pyrenean deformations are mainly located at the boundaries of the continental and oceanic domains and affect the oceanic crust. This deformation is principally underlined by compressive and inversed structures.

Mots clés: Bay of Biscay; Pyrenean deformation; Eocene time; Late Cretaceous time

Domaines: Sciences de la Terre

Isabelle Thinon, Luis Fidalgo-González, Jean-Pierre Réhault, Jean-Louis Olivet. Pyrenean deformations in the Bay of Biscay - Déformations pyrénéennes dans le Golfe de Gascogne. Comptes rendus de l’Académie des sciences. Série IIa, Sciences de la terre et des planètes, 2001, 332 (9), pp.561. ⟨10.1016/S1251-8050(01)01576-2⟩. ⟨hal-00647829⟩