États de contraintes et mécanismes d'ouverture et de fermeture des bassins permiens du Maroc hercynien. L'exemple des bassins des Jebilet et des RéhamnaStates of stresses and opening/closing mechanisms of the Permian basins in Hercynian Morocco. The example of the Jebilet and Réhamna Basins |
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| Authors: | Amal Saidi Abdelfatah Tahiri Lahcen Ait Brahim Maraim Saidi |
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| Affiliation: | 1. Institut scientifique, département de géologie, BP 703, Rabat-Agdal, Maroc;2. Département de géologie, faculté des sciences, BP1013, Rabat, Maroc |
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| Abstract: | The fracturing analysis in the Permian basins of Jebilet and Rehamna (Hercynian Morocco) and the underlying terranes allowed us to suggest a model for their opening. Three tectonic episodes are distinguished: a transtensional episode NNE–SSW-trending (Permian I), occurring during the opening along sinistral wrench faults N70–110-trending, associated with synsedimentary normal faults; a transpressive episode ESE–WNW-trending (Permian II), initiating the closure, the normal faults playing back reverse faults and the N70 trending faults dextral wrench faults; a compressional episode NNW–SSE (post-Permian, ante-Triassic), accentuating the closure and the deformation and putting an end to the Tardi-Hercynian compressive movements. To cite this article: A. Saidi et al., C. R. Geoscience 334 (2002) 221–226. |
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| Keywords: | Maroc bassins permiens fracturation contraintes tectoniques Morocco Permian basins fracturing tectonic stresses Géodynamique Geodynamics |
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