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handle: 10261/86643 , 10261/86411
[ES] En este trabajo se describen los resultados obtenidos del análisis de estratigrafía sísmica del registro Cuaternario del Sistema Deposicional Contornítico (SDC) de Le Danois en el Margen Cantábrico y su comparación con el SDC del Golfo de Cádiz. Se trata de depósitos generados por la Corriente Mediterránea de Salida y, aunque en contextos geológicos diferentes, presentan características comunes: i) Desarrollo de drifts monticulares elongados y separados; ii) Registro sedimentario Cuaternario compuesto por dos grandes secuencias, separadas por las discontinuidades (QB, MPR y la actual superficie del fondo marino) y 8 unidades sísmicas; iii) Patrón cíclico en las facies sísmicas: base transparente, que pasa a más reflectiva a techo y termina en superficie de erosión; iv) Importante cambio en la arquitectura sedimentaria a partir de la discontinuidad MPR, donde se pasa de un drift monticular con una configuración oblicua (Cádiz) o confinado (Le Danois) a una configuración sigmoidal-oblicua y de mayor espesor. Este cambio se asocia a un importante evento paleoclimático en el Cuaternario que dio paso a la instauración de los ciclos asimétricos de excentricidad de 100 ka
[EN] The results from a seismic stratigraphy analyses are present, obtained from the Contourite Depositional System (CDS) of Le Danois during the Quaternary in the Cantabrian Margin and its comparison with the CDS in the Gulf of Cadiz is shown. These deposits are generated by the Mediterranean Outflow Water, and although they are located in different geological settings, they show common features: i) Mounded elongated and separated drifts; ii) Quaternary sedimentary record composed of two main sequences, separated by discontinuities (QD, MPR and recent seafloor) and 8 seismic units; iii) Cyclic pattern in seismic facies: transparent on the bottom that changes to more reflective to the top, to finish in erosive surface; iv) Important change in the sedimentary architecture from the MPR discontinuity, changing from a oblique mounded drift (Cadiz) or confined (Le Danois) to a sigmoid-oblique configuration and more thickness. This change is associated with an important paleoclimatic event in the Quaternary that gave place to the instauration of eccentricity asymmetric cycles of 100 ka
Este trabajo se ha realizado bajo el marco de los Proyectos CYCIT MARCONI (REN2001-1734 C03-01/M), ECOMARG (REN2002-00916/MAR), GALIPOR, Euromargins MOUNDFORCE y EC FP5 EURODOM
VII Congreso Geológico de España, 14-18 Julio 2008, Las Palmas de Gran Canaria.-- 4 pages, 3 figures
Peer Reviewed
Quaternary, Vontourite depositional system, Mediterranean Outflow Water, Banco Le Danois, Sistema deposicional contornítico, Corriente mediterránea, Cuaternario, Cantabrian margin, Le Danois Bank, Margen Cantábrico
Quaternary, Vontourite depositional system, Mediterranean Outflow Water, Banco Le Danois, Sistema deposicional contornítico, Corriente mediterránea, Cuaternario, Cantabrian margin, Le Danois Bank, Margen Cantábrico
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