Influence of alongslope processes on modern turbidite systems and canyons in the Alboran Sea (southwestern Mediterranean)
| العنوان: | Influence of alongslope processes on modern turbidite systems and canyons in the Alboran Sea (southwestern Mediterranean) |
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| المؤلفون: | Carmen Juan, Damien Do Couto, Raúl Periáñez, Javier Valencia, David Casas, Gemma Ercilla, Christian Gorini, Juan Tomás Vázquez, José-María Abril, Bouchta El Moumni, Elia d'Acremont, Belén Alonso, Ferran Estrada |
| المساهمون: | Ministerio de Economía y Competitividad (España), European Commission, Universidad de Sevilla. Departamento de Física Aplicada I, Universidad de Sevilla. RNM-138: Física Nuclear Aplicada, Ministerio de Economía y Competitividad (MINECO). España, Ministerio de Ciencia Y Tecnología (MCYT). España |
| المصدر: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| بيانات النشر: | Elsevier BV, 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | Canyon, Alongslope processes, Morphoseismic, geography, geography.geographical_feature_category, Downslope processes, Contourite, Aquatic Science, Oceanography, Alboran Sea, Turbidite, Sediments, Continental margin, Ridge, Ocean gyre, Overbank, Sedimentology, Geomorphology, Geology, Turbidite system |
| الوصف: | Ercilla, Gemma ... et al.-- 16 pages, 11 figures, 1 table, supplementary material https://doi.org/10.1016/j.dsr.2018.12.002 This is an interdisciplinary study that combines morphoseismics, sedimentology and numerical modelling to elucidate at different scales of resolution the influence of alongslope processes on the turbidite systems (TSs) and canyons in the Alboran Sea (southwestern Mediterranean). Nine TSs are mapped in the Spanish margin (La Linea, Guadiaro, Baños, Torrenueva, Fuengirola, Salobreña, Sacratif, Calahonda and Almeria) and two in the Alboran Ridge (Piedra Escuela and Al-Borani). In the Moroccan margin, there are only two canyons (Ceuta and Nekor). Distinctive morphoseismic and sedimentological signatures from TSs and canyons have enabled three regional models of alongslope influence to be distinguished: a) Alongslope processes are dominant. This scenario characterizes the canyons of the Moroccan margin. The diagnostic signature is the lack of leveed channels and lobes at the Ceuta and Nekor Canyon mouths. b) Different degrees of interplay exist between alongslope and downslope processes. This scenario occurs in the TSs of the western Spanish margin. Here, the alongslope influence on TSs (La Linea, Guadiaro, Baños, Torrenueva and Fuengirola) is evidenced by the lack of overbank deposits in the La Linea and Guadiaro Canyons and an alongslope trend in the morpho-architecture of the channelized lobes and in the textural distribution of canyon/channel deposits (mass-flow deposits and turbidites). Both signatures indicate sandier TSs as well as Bouma turbidite sequences lacking the finest levels towards the Strait of Gibraltar. Local intercalations of contourites are also present in the Guadiaro lobe deposits. c) Downslope processes are dominant. This scenario characterizes the TSs of the eastern and central Spanish margin and Alboran Ridge. There, TSs seem to be controlled solely by the characteristics of the downslope gravity flows that transport sediment. The hydrodynamic and sediment dispersion models confirm that the main oceanographic factors governing the variable alongslope influence in TSs and canyons are the following: a vigorous WMDW flow along the Moroccan margin and the energetic Atlantic Jet, western Atlantic anticyclonic gyre and general acceleration of the Mediterranean waters towards the Strait of Gibraltar, along the western Spanish margin. This study demonstrates the pivotal role that alongslope processes can play in the onset and formation of TSs and canyons at continental margins This research is part of the Spanish projects FAUCES CMT2015-65461-C2-R (Ministerio de Economía y Competitividad-MINEICO/Fondo Europeo de Desarrollo Regional-FEDER), DAMAGE (Ministerio de Economía y Competitividad/ AEI/FEDER CGL2016-80687-R) and MARSIBAL (Ministerio de Ciencia y Tecnología, REN2001-3868-C03). This work also benefited from the French program Actions Marges, the EUROFLEETS (Towards an Alliance of European Research Fleets) program (FP7/2007-2013; n°228344), project FICTS-2011-03-01. Part of this work was completed with support from the IHS Kingdom Suite® educational license |
| وصف الملف: | application/pdf |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e7f12e8e6c771a6d4f28bb26bda49cb8 https://hdl.handle.net/10508/14630 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....e7f12e8e6c771a6d4f28bb26bda49cb8 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |