Neotectónica del borde oriental de la cuenca de Madrid

Resumen

An analysis of the neotectonic activity and the current stress state of the eastern border of Madrid Basin has been carried ont using structural-methods (fault population analysis), as well as seismological methods. Two stress tensors have been established: - Tensor 1: with a N150ºE shortening trend, characterized mainly by strike-slip faults. This tensor corresponds to the "Guadarrama" stress field (Capote et al., 1990), wihch causes the Central System structure; dated middle Aragonian-lower Pleistocene in the eastern border of Madrid Basin (Muñoz Martín, 1993). - Tensor 2: dated post-Iower Pleistocene, with a N150°E extension trend, characterized basically by normal faults. Actual stress tensor deduced focal mechanisms by the seismological method is compatible with the paleostress field deduced for the middle-Iower Pleistocene (tensor 2).