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Finite-element modelling of Tertiary paleostress fields in the eastern part of the Tajo Basin (central Spain)

Muñoz Martín, Alfonso and Cloetingh, Sierd and Vicente Muñoz, Gerardo de and Andeweg, Bernd (1998) Finite-element modelling of Tertiary paleostress fields in the eastern part of the Tajo Basin (central Spain). Tectonophysics, 300 . pp. 47-62. ISSN 0040-1951

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Abstract

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.


Item Type:Article
Uncontrolled Keywords:Paleostress; Finite-element modelling; Tajo Basin; Tertiary
Subjects:Sciences > Geology > Geodynamics
ID Code:5900
Deposited On:10 Oct 2006
Last Modified:06 Feb 2014 07:46

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