The influence of basement structure on the evolution of the Bicorb-Quesa Diapir (eastern Betics, Iberian Peninsula): contractive thin-skinned deformation above a pre-existing extensional basement fault

On the basis of an analysis of structural surface data in addition to previously available and new magnetotelluric data, it was possible to reconstruct the evolution of Bicorb-Quesa Diapir. This was initiated as a reactive diapir in relation to a basement fault. The reactive diapir was rejuvenated by a thin-skinned compression during the Paleogene and rose during an extensional early-middle Miocene phase. Later, in the middle Miocene, the diapir was squeezed and then, in the late Miocene, was extensionally reactivated. The current reconstruction allows us to analyse a diapir affected by a thin-skinned contractional deformation located on top of a pre-existing basement fault. Our study highlights the role played by the geometric relationship between the propagation direction of the cover deformation and the basement fault.