Distribution and origin of submarine landslides in the active margin of the southern Alboran Sea (Western Mediterranean Sea)

Autor: Elia d'Acremont, Sara Lafuerza, Alain Rabaute, Manfred Lafosse, Martin Jollivet Castelot, Christian Gorini, Belen Alonso, Gemma Ercilla, Juan Tomas Vazquez, Thomas Vandorpe, Carmen Juan, Sébastien Migeon, Silvia Ceramicola, Nieves Lopez-Gonzalez, Mathieu Rodriguez, Bouchta El Moumni, Oumnia Benmarha, Abdellah Ammar
Přispěvatelé: Centre National de la Recherche Scientifique (France), European Commission, Ministerio de Economía y Competitividad (España), Agencia Estatal de Investigación (España), Institut des Sciences de la Terre de Paris (iSTeP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Instituto de Ciencias del Mar de Barcelona (ICM), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Instituto Español de Oceanografía (IEO), Málaga., Flanders Marine Institute (VLIZ), InnovOcean site, Ostend, Belgium, Universiteit Gent = Ghent University (UGENT), Géoazur (GEOAZUR 7329), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud]), Istituto Nazionale di Geofisica e di Oceanografia Sperimentale (OGS), Laboratoire de géologie de l'ENS (LGENS), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris, École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Université Abdelmalek Essaâdi (UAE), Université Mohammed V de Rabat [Agdal] (UM5)
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Marine Geology (0025-3227) (Elsevier BV), 2022-03, Vol. 445, P. 106739 (19p.)
e-IEO. Repositorio Institucional Digital de Acceso Abierto del Instituto Español de Oceanografía
instname
Marine Geology
Marine Geology, 2022, 445, pp.106739. ⟨10.1016/j.margeo.2022.106739⟩
Digital.CSIC. Repositorio Institucional del CSIC
ISSN: 0025-3227
DOI: 10.1016/j.margeo.2022.106739⟩
Popis: 19 pages, 13 figures, 1 table, supplementary material https://doi.org/10.1016/j.margeo.2022.106739.-- Seismic reflection and bathymetric data collected during the MARLBORO and SARAS cruises are stored at SISMER repository (https://doi.org/10.17600/11480100, https://doi.org/10.17600/12450090, and https://campagnes.flotteoceanographique.fr/campagnes/12000010). Landslide parameters for MTDs mapped during this study are given in the appendix.
Earthquakes are the most commonly cited cause of offshore slope failure, followed by high sedimentation rates and ensuing pore pressure build-up. In the South Alboran Sea, the moderate seismicity (Mw = 6.4) of the strike-slip Al Idrissi Fault Zone does not appear to control directly the landslides distribution. To provide a preliminary geohazard assessment, we characterized the spatial distribution, the volume and the ages of the submarine landslides from multibeam and seismic reflection data in the southern part of the Alboran Sea. Since the Quaternary numerous submarine landslide processes have affected the marine sedimentary cover with volumes of the mass transport deposits (MTD) estimated between 0.01 and 15 km3. West of the Al Idrissi Fault Zone, along the South Alboran Ridge's northern flank, the distribution of the MTD follows the SW-NE bank and ridge trend that correlates with blind thrusts and folds covered by a plastered contourite drift. A pockmark field, related to fluid escape, is visible near landslide scars where the contourite drift is relatively thicker. In this area, landslide scars occur on variable slopes (2–24°) and their associated MTDs show variable decompacted volumes (0.01-10 km3). East of the Al Idrissi Fault Zone, between the Alboran Ridge and the Pytheas Bank, the mapped MTDs have uneven volume. The smaller ones (10°), whereas those of the largest ones (3–15 km3) occur on gentler slopes (
This work was funded by the French programs Actions Marges, Défi Risques Naturels CNRS-IRD (MITI-ALARM) and UPMC-Emergence (ALARM project), the ALBAMAR JCJC ANR-17-03CE-0004, the EUROFLEETS program (FP7/2007-2013; n°228344), project FICTS-2011-03-01. Seismic reflection data were processed using the Seismic UNIX SU and Geovecteur© software. The processed seismic data were interpreted using Kingdom IHS Suite© software. This work also benefited from the DAMAGE (AEI/FEDER CGL2016-80687-R) and FAUCES (Ref CTM2015-65461-C2-R; MINCIU/FEDER) Projects financed by “Ministerio de Economía y Competitividad y al Fondo Europeo de Desarrollo Regional” (FEDER). This work acknowledges the ‘Severo Ochoa Centre of Excellence’ accreditation of ICM-CSIC (CEX2019-000928-S
Databáze: OpenAIRE
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