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| Título: | Oceanographic and contourite processes associated to the Mediterranean Outflow Water after its exit from the Gibraltar Strait |
Autor: | Hernández-Molina, Francisco J.; Ercilla, Gemma CSIC ORCID ; García, Marga CSIC ORCID; Juan, Carmen CSIC ORCID | Fecha de publicación: | 5-sep-2013 | Citación: | 30th IAS Meeting of Sedimentology. Conference abstracts volume: T3S4_O3 (2013) | Resumen: | The scientific knowledge of the crucial features of deep ocean circulation and role in the sedimentary evolution of continental margins remain poorly understood. To improve their knowledge it is essential to establish a connection between contourite features, their evolution and the oceanographic processes. In this work a novel multi-‐discipline approach, which promotes a oceanographic, morphosedimentary and stratigraphic study has been executed over an extensive terrace in the proximal sector of the Contourite Depositional System (CDS) of the Gulf of Cadiz close to the Straits of Gibraltar comprising sandy-sheeted drifts. The study features new multibeam echosounder data, seismic profiles, surficial sediments samples collected during the CONTOURIBER-1 Cruise (2010), as well as on an extensive compilation of regional oceanographic and geophysical data collected during the last decades. Two distinct terraces including two large erosive channels allow determination of a new and detailed scheme of Mediterranean Outflow Water (MOW) overflow, which combines a primary along-slope circulation and a secondary circulation oblique to the main core. Also, present data demonstrates that modern circulation of the MOW is focused mainly along the upper slope and the upper terrace in the proximal part of the Middle Slope. The largest erosive features identified on the lower terrace remain inactive due to the weaker influence of the MOW and are most likely results of the deeper and faster circulation of the MOW during glacials. Mapping of these features coupled with CTD data allows to further understand the pathway and deceleration of the MOW, in addition to aid the conceptual identification of contourite terraces. In addition the contourite features characterization and the related sandy contourite deposits might have important implications for deep-water oil exploration | Descripción: | Hernández-Molina, Francisco J. ... et al.-- 30th IAS Meeting of Sedimentology, 2-5 September 2013, Manchester | Versión del editor: | http://www.sedimentologists.org/meetings/ims-scientific-programme | URI: | http://hdl.handle.net/10261/89853 |
| Aparece en las colecciones: | (IACT) Comunicaciones congresos (ICM) Comunicaciones congresos |
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