Recent tectonics in the Betic thrust front. The Jimena and Bedmar deformations (Jaen Province, Spain)

4 páginas, 4 figuras, 1 tabla.-- Trabajo presentado en la 44ª Sesión Científica, Jaén, 2008.In the area of Jimena-Bedmar, in the Guadalquivir basin, the northwards displacement of the External Betic units deformed the sedimentary Miocene infilling of the basin. Especially remarkable is an E-W anticline affecting middle-late Miocene limestones and marls. This structure is dissected by two fault sets, striking N20º and N140º and some reverse faults. Striation and sense of shearing of minor faults in the Cerro Atalaya indicate the existence of two main deformation phases. The first one is characterized by N-S compression congruent with the orientation of regional folds and thrust kinematics. The last one is characterized by a roughly E-W extension that produces faults with topographic expression, as the Golondrinas and Bedmar faults. The time of the deformation ranges between the uppermost Miocene (compression) and the present (extension).Este estudio se ha financiado a través de los proyectos CGL2006-10202/BTE; CGL2007-60535/BTE y CSD2006- 00041/MEC y TOPO-IBERIA CONSOLIDER-INGENIO CSD2006- 00041 y los grupos de la Junta de Andalucía RNM 217 y 3Peer reviewe