RT Journal Article
T1 Finite-element modelling of Tertiary paleostress fields in the eastern part of the Tajo Basin (central Spain)
A1 Muñoz Martín, Alfonso
A1 Cloetingh, Sierd
A1 Vicente Muñoz, Gerardo de
A1 Andeweg, Bernd
AB Three subsequent Tertiary paleostress fields that are deduced from fault-slip data for the eastern part of the Tajo Basin are analyzed by finite-element studies. The modelling results show that maximum horizontal stresses (SHmax) are mainly controlled by the geometry of the model limits and the boundary conditions applied. The models are used to test two hypotheses on the origin of the Altomira Range. A local stress field responsible for its formation (‘Altomira') can be modelled successfully by superposition in time and place of two major paleostress fields (‘Iberian' and ‘Guadarrama'). Stress trajectories have been modelled with respect to a homogeneous cover and heterogeneous basement to investigate the role of rheological contrasts between different basement blocks on the orientation of the stress field. Results of this kind of modelling suggest a mechanical decoupling between the cover and the basement, especially for the ‘Altomira' paleostress field.
SN 0040-1951
YR 1998
FD 1998-05-10
LK https://hdl.handle.net/20.500.14352/60452
UL https://hdl.handle.net/20.500.14352/60452
LA spa
DS Docta Complutense
RD 19 may 2024