Modelos de sistemas turbidíticos en el Área de Motril (NE Alborán)

V Congreso Geológico de España, 10-14 julio 2000, Alicante.-- 4 pages, 1 figure

[EN] The Calahonda, Sacratif and Motril turbidite system have been developed during the Plio-Quaternary in the Northern Alboran Sea. The stratigraphic architecture of these depositional systems has been established through the analysis of seismic profiles and swath bathymetry records. These turbidite systems show an important variability in its stratigraphic architecture allowing the development of three models of turbidite systems. The Calahonda Turbidite System represents a "delta-fed ramp" which is developed during the Quaternary in a steep fault-controlled tectonic margin. Four small canyons which are incised in the upper slope fed up toten small channel-levee complexes. The Sacratif Turbidite System is a "canyon-fed turbidite system" which is built during the Plio-Quaternary. The sedimentary activity of one or two big canyons allows the formation of well-developed channel-levee complexes and channelized lobes. The Motril Turbidite System is a "river-fed turbidite system" which is built during the Upper Pliocene and the Quaternary. This system is fed by the Motril Paleocanyon which is filled during the Upper Quaternary and recent small gullies are eroded

[ES] En el Area de Motril (sector central del margen septen­trional del Mar de Alborán) se forman tres sistemas turbidíticos durante el Plio-Cuatemario que se sitúan en continuidad lateral de Oeste a Este: Calahonda, Sacratif y Motril. Estos sistemas turbidíticos se desarrollan en una cuenca semicerrada localizada entre la Península Ibérica y varios altos volcánicos (Pérez-Belzuz, 1999) (Fig. 1). Estos sistemas deposicionales clásticos se edifican en el contexto de un margen tectónicamente activo y estrecho (plataforma de 2-4 km, talud de 6-12 km, base de talud de 5-12 km) (Comas et al, 1992; Maldonado et al., 1992). Estos sistemas turbidíticos tienen reducidas dimensiones (36 km de longitud máxima) y se desarrollan a una profundidad redu­cida (máxima 950 m) (Fig. 1). Su sistema de alimentación está constituido por un total de ocho cañones submarinos así como por varias cárcavas submarinas, llegando a fun­cionar simultáneamente un máximo de seis cañones durante el Cuaternario Superior (Pérez-Belzuz, 1999)

Peer reviewed