From rifting to spreading in the eastern Gulf of Aden: a geophysical survey of a young oceanic basin from margin to margin
| Autor: | Sylvie Leroy, Pascal Gente, Marcia Maia, Julie Perrot, Philippe Huchon, Philippe Patriat, Angelina Blais, Ali Al-Kathiri, Claude Lepvrier, Jean Marc Fleury, Elia d'Acremont, Pierre Yves Ruellan, Serge Merkouriev, Marc Fournier, Nicolas Bellahsen, Marie Odile Beslier |
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| Přispěvatelé: | Laboratoire de tectonique (LT), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Centre National de la Recherche Scientifique (CNRS), Domaines Océaniques (LDO), Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Observatoire des Sciences de l'Univers-Institut d'écologie et environnement-Centre National de la Recherche Scientifique (CNRS), Géoazur (GEOAZUR 6526), Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2004 |
| Předmět: |
[SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics
geography geography.geographical_feature_category Rift 010504 meteorology & atmospheric sciences Transform fault Geology Deep basin 010502 geochemistry & geophysics 01 natural sciences Seafloor spreading Horst and graben Discontinuity (geotechnical engineering) 14. Life underwater Oceanic basin ComputingMilieux_MISCELLANEOUS Seismology 0105 earth and related environmental sciences |
| Zdroj: | Terra Nova Terra Nova, 2004, 16 (4), pp.185-192. ⟨10.1111/j.1365-3121.2004.00550.x⟩ Terra Nova, Wiley-Blackwell, 2004, 16 (4), pp.185-192. ⟨10.1111/j.1365-3121.2004.00550.x⟩ |
| ISSN: | 1365-3121 0954-4879 |
| DOI: | 10.1111/j.1365-3121.2004.00550.x |
| Popis: | A geophysical survey in the eastern Gulf of Aden, between the Alula–Fartak (52°E) and the Socotra (55°E) transform faults, was carried out during the Encens–Sheba cruise. The conjugate margins of the Gulf are steep, narrow and asymmetric. Asymmetry of the rifting process is highlighted by the conjugate margins (horst and graben in the north and deep basin in the south). Two transfer fault zones separate the margins into three segments, whereas the present-day Sheba Ridge is divided into two segments by a transform discontinuity. Therefore segmentation of the Sheba Ridge and that of the conjugate margins did coincide during the early stages of oceanic spreading. Extensive magma production is evidenced in the central part of the western segment. Anomaly 5d was identified in the northern and southern parts of the oceanic basin, thus confirming that seafloor spreading in this part of Gulf of Aden started at least 17.6 Ma ago. |
| Databáze: | OpenAIRE |
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