Multiple-frequency tomography of the upper mantle beneath the African/Iberian collision zone
| العنوان: | Multiple-frequency tomography of the upper mantle beneath the African/Iberian collision zone |
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| المؤلفون: | Mickael Bonnin, Christine Thomas, Antonio Villaseñor, Guust Nolet, Josep Gallart |
| المساهمون: | Géoazur (GEOAZUR 7329), Institut national des sciences de l'Univers (INSU - CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Centre National de la Recherche Scientifique (CNRS)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA), Institute of Earth Sciences Jaume Almera, Consejo Superior de Investigaciones Científicas [Spain] (CSIC), Institut für Geophysik [Münster], Westfälische Wilhelms-Universität Münster (WWU), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud]), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud]), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Westfälische Wilhelms-Universität Münster = University of Münster (WWU), Université Côte d'Azur (UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-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)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA) |
| المصدر: | Geophysical Journal International Geophysical Journal International, Oxford University Press (OUP), 2014, 198 (3), pp.1458-1473. ⟨10.1093/gji/ggu214⟩ Digital.CSIC. Repositorio Institucional del CSIC instname Geophysical Journal International, 2014, 198 (3), pp.1458-1473. ⟨10.1093/gji/ggu214⟩ |
| بيانات النشر: | HAL CCSD, 2014. |
| سنة النشر: | 2014 |
| مصطلحات موضوعية: | Europe, 010504 meteorology & atmospheric sciences, [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph], Continental tectonics: compressional, 010502 geochemistry & geophysics, 01 natural sciences, Geochemistry and Petrology, Asthenosphere, Lithosphere, Subduction zone processes, 14. Life underwater, 0105 earth and related environmental sciences, [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics, geography, geography.geographical_feature_category, Seismic tomography, Subduction, Geodynamics, Collision zone, Geophysics, Dynamics of lithosphere and mantle, Volcano, compressional [Continental tectonics], Africa, Cenozoic, Seismology, Geology |
| الوصف: | During the Cenozoic, the geodynamics of the western Mediterranean domain has been characterized by a complex history of subduction of Mesozoic oceanic lithosphere. The final stage of these processes is proposed to have led to the development of the Calabria and Gibraltar arcs, whose formation is still under debate. In this study, we take advantage of the dense broad-band station networks now available in the Alborán Sea region, to develop a high-resolution 3-D tomographic P velocity model of the upper mantle beneath the African/Iberian collision zone that will better constraint the past dynamics of this zone. The model is based on 13200 teleseismic arrival times recorded between 2008 and 2012 at 279 stations for which cross-correlation delays are measured with a new technique in different frequency bands centred between 0.03 and 1.0 Hz, and for the first time interpreted using multiple frequency tomography. Our model shows, beneath the Alborán Sea, a strong (4 per cent) fast vertically dipping anomaly observed to at least 650 km depth. The arched shape of this anomaly, and its extent at depth, are coherent with a lithospheric slab, thus favouring the hypothesis of a westward consumption of the Ligurian ocean slab by roll-back during Cenozoic. In addition to this fast anomaly in the deep upper mantle, high intensity slow anomalies are widespread in the lithosphere and asthenosphere beneath Morocco and southern Spain. These anomalies are correlated at the surface with the position of the Rif and Atlas orogens and with Cenozoic volcanic fields. We thus confirm the presence, beneath Morocco, of an anomalous (hot?) upper mantle, but without clear indication for a lateral spreading of the Canary plume to the east. The Morocco M¨unster project was funded under grant DFG TH1530/5-1. The deployment and data processing for Spanish stations was funded by Consolider-Ingenio 2010 project TOPOIBERIA (CSD2006-00041) as well as ALERT-ES (CGL2010- 19803-C03-02). This research is supported by the European Research Council (Advanced grant 226837). The figures were produced using the Generic Mapping Tools (GMT) software (Wessel & Smith 1998; Wessel et al. 2013). |
| اللغة: | English |
| تدمد: | 0956-540X 1365-246X |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d3b8790df771b0b48ea9da1cf96ca8c2 https://hal.archives-ouvertes.fr/hal-02304699 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....d3b8790df771b0b48ea9da1cf96ca8c2 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 0956540X 1365246X |
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