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Paleostress analysis of the volcanic margins of Yemen |
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| Authors: | Khaled Khanbari Philippe Huchon |
| Institution: | 1. Department of Earth and Environmental Sciences, Sana’a University, PO Box?12167, Sana’a, Yemen 2. Yemen Remote Sensing and GIS Center, Sana’a, Yemen 3. iSTeP, UMR 7193, UPMC Université Paris 6, Case 129, 4 place Jussieu, 75005, Paris, France 4. iSTeP, UMR 7193, CNRS, Paris, France |
| Abstract: | The western part of Yemen is largely covered by Tertiary volcanics and is bounded by volcanic margins to the west (Red Sea) and the south (Gulf of Aden). The Oligo–Miocene evolution of Yemen results from the interaction between the emplacement of the Afar plume, the opening of the Red Sea, and the westward propagation of the Gulf of Aden. Structural and microtectonic analyses of fault slip data collected in the field reveal that the volcanic margins of Yemen are affected by three main extensional tectonic events. The chronological order of these events is as follows: first E–W extension was associated with the emplacement of volcanic traps of Yemen, then NE–SW extension was related to the Red Sea rifting, and finally, the volcanic margin was submitted to N160°E extension, perpendicular to the overall trend of the Gulf of Aden, which we interpret as induced by the westward propagation of the oceanic ridge of the Gulf of Aden. |
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