Morphostructure of the Egyptian Continental Margin: Insights from Swath Bathymetry Surveys |
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Authors: | Jean Mascle Olivier Sardou Lies Loncke Sébastien Migeon Laurent Caméra Virginie Gaullier |
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Institution: | (1) site de Villefranche, Géosciences-Azur, BP 48, 06235 Villefranche/mer, France;(2) Département de Géologie, Université de Picardie Jules Verne, 33 rue de Saint Leu, 80039 Amiens, France;(3) Legem, Université de Perpignan, avenue P.Alduy, Perpignan, France |
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Abstract: | In the Eastern Mediterranean, offshore Egypt, the Nile continental margin is characterized by a large deep water turbiditic
system known as the Nile Deep Sea Fan. This post-Miocene terrigenous construction covers an approximately 10 km-thick sedimentary
pile, including 1–3 km of Messinian salt layers. Systematically collected swath bathymetric data proved to be the most powerful
tool to discover, describe and study many sea floor features of this sedimentary construction which reflects competition between
active tectonic, sedimentary, and geochemical processes. Gravity tectonics, triggered by underlying mobile salt layers, construction
of channel-levee systems, the passage of turbidite flows, sedimentary slope failures at various scales, massive mud expulsions
and fluid seepages are all interfering to shape the Nile Deep Sea Fan seabed. |
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Keywords: | swath bathymetry morphology sea floor processes Nile continental margin |
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