Age dating and triggering mechanisms of recent submarine landslides in the Alboran Sea
International audience In the southern margin of the Alboran Sea, the sedimentary succession over the past 1 Myr contains several submarine landslides. We observe that their geographical distribution does not appear to be related to the active Al Idrissi fault system (AIFS) responsible of the recent...
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ftanrparis:oai:HAL:hal-04280652v1 2024-01-14T10:10:05+01:00 Age dating and triggering mechanisms of recent submarine landslides in the Alboran Sea Lafuerza, Sara Frigola, Jaime Emmanuel, Laurent Torcq, Lou d'Acremont, Elia Vidil, Léa Alonso, Belén de La Fuente, María Campderros, Sara Oliveira de Sa, Alana Leroy, Sylvie Rabaute, Alain Ketzer, Marcelo Gorini, Christian Praeg, Daniel Scientific Party, Albaneo-Albacore 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) Sorbonne Université (SU) Linnaeus University Géoazur (GEOAZUR 7329) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Sud ) Société Géologique de France ANR-22-EDIR-0001,ALBANEO,Systèmes de failles actives au niveau d'une frontière de plaque en devenir, Mer d'Alboran(2022) Rennes, France 2023-10-30 https://hal.science/hal-04280652 en eng HAL CCSD hal-04280652 https://hal.science/hal-04280652 RST 2023 - 28e Réunion des Sciences de la Terre https://hal.science/hal-04280652 RST 2023 - 28e Réunion des Sciences de la Terre, Société Géologique de France, Oct 2023, Rennes, France. https://rst2023-rennes.sciencesconf.org/484873 https://rst2023-rennes.sciencesconf.org submarine landslides Alboran Sea sediment cores age dating contourites seismicity [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/conferenceObject Conference papers 2023 ftanrparis 2023-12-16T22:27:37Z International audience In the southern margin of the Alboran Sea, the sedimentary succession over the past 1 Myr contains several submarine landslides. We observe that their geographical distribution does not appear to be related to the active Al Idrissi fault system (AIFS) responsible of the recent earthquakes (i.e. they are located more than 10 km away). The head scarps of landslides west of AIFS coincide with the edges of the thickest parts of the contourite drifts dominating this margin. This evidence potentially supports the idea that landslide initiation is related to locally higher sedimentation rates in the edges of contourites, which drive upward fluid flow. Additionally, contourite edges overlying active blind thrusts, initiated during the Tortonian due to the Euro-African convergence, suggest that fluid flow could also result from tectonic activity. These two hypothesis converge on the following idea: local upward fluid flow reduces the effective stresses of contourite edges, thus preconditioning their stability and bringing the slopes to a sort of metastable state. While the distances between the investigated landslides and the AIFS cannot be used as evidence for earthquakes as potential triggers, the discussion of the far-reaching effects of earthquakes on metastable slopes remains open. During the Albacore cruise (NO Pourquoi Pas?, 2021) several calypso cores were collected at three sites west of the AIFS, both inside and outside landslides with a seafloor expression. The objective is to better understand the role of sedimentation rates in fluid flow generation and the potential effects of seismic loading on landslide triggering. Correlations between continuous density and magnetic susceptibility measurements of whole round cores and in- situ geotechnical measurements provide information about the presence of a sediment drape overlying landslide deposits. Isotopic δ18O analysis of planktonic foraminifera from sediment cores, correlated with paleoceanographic records in the Alboran sea, suggests ... Conference Object Planktonic foraminifera Portail HAL-ANR (Agence Nationale de la Recherche) Pourquoi Pas ENVELOPE(135.783,135.783,-66.083,-66.083) Pourquoi-Pas ENVELOPE(-67.450,-67.450,-67.700,-67.700) Pourquoi-Pas? ENVELOPE(135.750,135.750,-66.200,-66.200) |
institution |
Open Polar |
collection |
Portail HAL-ANR (Agence Nationale de la Recherche) |
op_collection_id |
ftanrparis |
language |
English |
topic |
submarine landslides Alboran Sea sediment cores age dating contourites seismicity [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
submarine landslides Alboran Sea sediment cores age dating contourites seismicity [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Lafuerza, Sara Frigola, Jaime Emmanuel, Laurent Torcq, Lou d'Acremont, Elia Vidil, Léa Alonso, Belén de La Fuente, María Campderros, Sara Oliveira de Sa, Alana Leroy, Sylvie Rabaute, Alain Ketzer, Marcelo Gorini, Christian Praeg, Daniel Scientific Party, Albaneo-Albacore Age dating and triggering mechanisms of recent submarine landslides in the Alboran Sea |
topic_facet |
submarine landslides Alboran Sea sediment cores age dating contourites seismicity [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience In the southern margin of the Alboran Sea, the sedimentary succession over the past 1 Myr contains several submarine landslides. We observe that their geographical distribution does not appear to be related to the active Al Idrissi fault system (AIFS) responsible of the recent earthquakes (i.e. they are located more than 10 km away). The head scarps of landslides west of AIFS coincide with the edges of the thickest parts of the contourite drifts dominating this margin. This evidence potentially supports the idea that landslide initiation is related to locally higher sedimentation rates in the edges of contourites, which drive upward fluid flow. Additionally, contourite edges overlying active blind thrusts, initiated during the Tortonian due to the Euro-African convergence, suggest that fluid flow could also result from tectonic activity. These two hypothesis converge on the following idea: local upward fluid flow reduces the effective stresses of contourite edges, thus preconditioning their stability and bringing the slopes to a sort of metastable state. While the distances between the investigated landslides and the AIFS cannot be used as evidence for earthquakes as potential triggers, the discussion of the far-reaching effects of earthquakes on metastable slopes remains open. During the Albacore cruise (NO Pourquoi Pas?, 2021) several calypso cores were collected at three sites west of the AIFS, both inside and outside landslides with a seafloor expression. The objective is to better understand the role of sedimentation rates in fluid flow generation and the potential effects of seismic loading on landslide triggering. Correlations between continuous density and magnetic susceptibility measurements of whole round cores and in- situ geotechnical measurements provide information about the presence of a sediment drape overlying landslide deposits. Isotopic δ18O analysis of planktonic foraminifera from sediment cores, correlated with paleoceanographic records in the Alboran sea, suggests ... |
author2 |
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) Sorbonne Université (SU) Linnaeus University Géoazur (GEOAZUR 7329) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Sud ) Société Géologique de France ANR-22-EDIR-0001,ALBANEO,Systèmes de failles actives au niveau d'une frontière de plaque en devenir, Mer d'Alboran(2022) |
format |
Conference Object |
author |
Lafuerza, Sara Frigola, Jaime Emmanuel, Laurent Torcq, Lou d'Acremont, Elia Vidil, Léa Alonso, Belén de La Fuente, María Campderros, Sara Oliveira de Sa, Alana Leroy, Sylvie Rabaute, Alain Ketzer, Marcelo Gorini, Christian Praeg, Daniel Scientific Party, Albaneo-Albacore |
author_facet |
Lafuerza, Sara Frigola, Jaime Emmanuel, Laurent Torcq, Lou d'Acremont, Elia Vidil, Léa Alonso, Belén de La Fuente, María Campderros, Sara Oliveira de Sa, Alana Leroy, Sylvie Rabaute, Alain Ketzer, Marcelo Gorini, Christian Praeg, Daniel Scientific Party, Albaneo-Albacore |
author_sort |
Lafuerza, Sara |
title |
Age dating and triggering mechanisms of recent submarine landslides in the Alboran Sea |
title_short |
Age dating and triggering mechanisms of recent submarine landslides in the Alboran Sea |
title_full |
Age dating and triggering mechanisms of recent submarine landslides in the Alboran Sea |
title_fullStr |
Age dating and triggering mechanisms of recent submarine landslides in the Alboran Sea |
title_full_unstemmed |
Age dating and triggering mechanisms of recent submarine landslides in the Alboran Sea |
title_sort |
age dating and triggering mechanisms of recent submarine landslides in the alboran sea |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://hal.science/hal-04280652 |
op_coverage |
Rennes, France |
long_lat |
ENVELOPE(135.783,135.783,-66.083,-66.083) ENVELOPE(-67.450,-67.450,-67.700,-67.700) ENVELOPE(135.750,135.750,-66.200,-66.200) |
geographic |
Pourquoi Pas Pourquoi-Pas Pourquoi-Pas? |
geographic_facet |
Pourquoi Pas Pourquoi-Pas Pourquoi-Pas? |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
RST 2023 - 28e Réunion des Sciences de la Terre https://hal.science/hal-04280652 RST 2023 - 28e Réunion des Sciences de la Terre, Société Géologique de France, Oct 2023, Rennes, France. https://rst2023-rennes.sciencesconf.org/484873 https://rst2023-rennes.sciencesconf.org |
op_relation |
hal-04280652 https://hal.science/hal-04280652 |
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1788064706328526848 |