The Ebro Deep-Sea Fan system |
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Authors: | C. Hans Nelson Andres Maldonado Francis Coumes Henri Got Andre Manaco |
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Affiliation: | (1) U.S. Geological Survey, 94025 Menlo Park, California;(2) Instituto “Jaime Almera”, Barcelona, Spain;(3) Laboratoire de Geologie ELF Aquitaine, Pau Cedex, France;(4) Centre de Recherches de Sedimentologie Marine, Universite de Perpignan, France |
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Abstract: | The Ebro Fan System consists of en echelon channel-levee complexes, 50×20 km in area and 200-m thick. A few strong reflectors in a generally transparent seismic facies identify the sand-rich channel floors and levee crests. Numerous continuous acoustic reflectors characterize overbank turbidites and hemipelagites that blanket abandoned channel-levee complexes. The interlobe areas between channel complexes fill with homogeneous mud and sand from mass flow and overbank deposition; these exhibit a transparent seismic character. The steep continental rise and sediment “drainage” of Valencia Trough at the end of the channel-levee complexes prevent the development of distributary channels and midfan lobe deposits. Margin setting represents fan and/or source area |
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