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Título: | Multidisciplinary characterization of Quaternary mass movement deposits in the Portimão Bank (Gulf of Cadiz, SW Iberia) |
Autor: | Silva, Pedro; Roque, Cristina; Drago, Teresa; Alonso, Belén CSIC ORCID ; Henry, B.; Ercilla, Gemma CSIC ORCID ; Lopes, A.; López-González, Nieves CSIC ORCID ; Casas, David CSIC ORCID ; Naughton, Filipa; Vázquez, Juan Tomás | Palabras clave: | Mass movement deposits Bathymetric and seismic profiles Piston core analyses Magnetic fabric Deformed sediments |
Fecha de publicación: | feb-2020 | Editor: | Elsevier | Citación: | Marine Geology 420: 106086 (2020) | Resumen: | We present a multidisciplinary study of the seismic stratigraphy, sedimentology, geochemistry and magnetism to characterize the Quaternary mass movement deposits (MMD) and the associated deformation in the Portimão Bank (Gulf of Cadiz, offshore SW Iberia). Two scales of approach have been applied. At large-scale (m to km) approach, were recognized and characterized a series of important and subsequent slide scars (tens of meters high) and MMD (the larger one with 10¿km length) related to landslides, more prominent at Portimão Bank's southern flank. At small-scale (cm) approach, we point out on a piston core collected within a scar affected by MMD, a replication of the sedimentary column as evidenced by geochronological results and corroborated by sedimentology, geochemistry and magnetic data. Magnetic fabric data enabled the identification and characterization of the internal structure and deformation of MMD along the sedimentary column. For last, geochronology and the morphology of Portimão seamount are discussed in order to constraint the factors controlling MMD triggering. The multidisciplinary approach is useful in a better characterization of the MMD at different scales and improved the understanding of its dynamics | Descripción: | 20 pages, 8 figures, 4 tables | Versión del editor: | https://doi.org/10.1016/j.margeo.2019.106086 | URI: | http://hdl.handle.net/10261/199923 | DOI: | 10.1016/j.margeo.2019.106086 | Identificadores: | issn: 0025-3227 |
Aparece en las colecciones: | (ICM) Artículos |
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Silva_et_al_2020_preprint.pdf | 21,95 MB | Adobe PDF | Visualizar/Abrir |
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