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Sedimentary Records in the Lesser Antilles Fore‐Arc Basins Provide Evidence of Large Late Quaternary Megathrust Earthquakes

dc.rights.licenseopenen_US
hal.structure.identifierInstitut de Physique du Globe de Paris [IPGP (UMR_7154)]
hal.structure.identifierLamont-Doherty Earth Observatory [LDEO]
dc.contributor.authorSEIBERT, Chloé
hal.structure.identifierInstitut de Physique du Globe de Paris [IPGP (UMR_7154)]
dc.contributor.authorFEUILLET, Nathalie
hal.structure.identifierGéoazur [GEOAZUR 7329]
dc.contributor.authorRATZOV, G.
hal.structure.identifierInstitut des Sciences de la Terre [ISTerre]
dc.contributor.authorBECK, Christian
hal.structure.identifierGéoazur [GEOAZUR 7329]
hal.structure.identifierGeo-Ocean [GEO-OCEAN]
hal.structure.identifierUniversité de Brest [UBO]
dc.contributor.authorMORENA, P.
hal.structure.identifierMuséum national d'Histoire naturelle [MNHN]
dc.contributor.authorJOHANNES, L.
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorDUCASSOU, Emmanuelle
hal.structure.identifierGeo-Ocean [GEO-OCEAN]
dc.contributor.authorCATTANEO, A.
hal.structure.identifierCollege of Earth, Ocean and Atmospheric Sciences [Corvallis] [CEOAS]
dc.contributor.authorGOLDFINGER, C.
hal.structure.identifierVariabilité de l'Océan et de la Glace de mer [LOCEAN-VOG]
dc.contributor.authorMORENO, Eva
hal.structure.identifierInstitut de Physique du Globe de Paris [IPGP (UMR_7154)]
hal.structure.identifierInstitut des Sciences de la MER de Rimouski [ISMER]
dc.contributor.authorBIEBER, A.
hal.structure.identifierInstitut de Physique du Globe de Paris [IPGP (UMR_7154)]
dc.contributor.authorBÉNÂTRE, G.
hal.structure.identifierInstitut des Sciences de la Terre de Paris [iSTeP]
dc.contributor.authorCARON, Benoît
hal.structure.identifierInstitut des Sciences de la MER de Rimouski [ISMER]
dc.contributor.authorCARON, M.
hal.structure.identifierInstitut des Sciences de la MER de Rimouski [ISMER]
dc.contributor.authorCASSE, M.
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorCAVAILHES, Thibault
hal.structure.identifierInstitut de Physique du Globe de Paris [IPGP (UMR_7154)]
dc.contributor.authorDEL MANZO, G.
hal.structure.identifierInstitut des Sciences de la MER de Rimouski [ISMER]
dc.contributor.authorDESCHAMPS, C.
hal.structure.identifierInstitut des Sciences de la MER de Rimouski [ISMER]
dc.contributor.authorDESIAGE, P.
hal.structure.identifierInstitut des Sciences de la MER de Rimouski [ISMER]
dc.contributor.authorDUBOC, Q.
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorFAUQUEMBERGUE, Kelly
hal.structure.identifierUnité Recherches et Développements Technologiques [RDT]
dc.contributor.authorFERRANT, A.
hal.structure.identifierInstitut de Physique du Globe de Paris [IPGP (UMR_7154)]
dc.contributor.authorGUYARD, H.
hal.structure.identifierInstitut de Physique du Globe de Paris [IPGP (UMR_7154)]
dc.contributor.authorJACQUES, E.
hal.structure.identifierLaboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
dc.contributor.authorLAURENCIN, M.
hal.structure.identifierGéoazur [GEOAZUR 7329]
dc.contributor.authorLECLERC, Frédérique
hal.structure.identifierCollege of Earth, Ocean and Atmospheric Sciences [Corvallis] [CEOAS]
dc.contributor.authorPATTON, J.
hal.structure.identifierInstitut de Physique du Globe de Paris [IPGP (UMR_7154)]
dc.contributor.authorSAUREL, J.
hal.structure.identifierInstitut des Sciences de la MER de Rimouski [ISMER]
dc.contributor.authorST-ONGE, G.
hal.structure.identifierUnité Recherches et Développements Technologiques [RDT]
dc.contributor.authorWOERTHER, P.
dc.date.accessioned2025-04-16T08:26:15Z
dc.date.available2025-04-16T08:26:15Z
dc.date.issued2024-01-31
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/206223
dc.description.abstractEnAbstract The seismic potential of the Lesser Antilles subduction zone is poorly known and highly debated. Only two damaging earthquakes have been reported in the historical period, in 1839 and 1843, but their sources and magnitude are still uncertain. Global Navigation Satellite Systems and coral data contradict each other, and no conclusion has been reached on the coupling ratio of the plate interface. Given the threat posed by the possible occurrence of a large megathrust earthquake, it is crucial to gain information on prehistorical events. We present the results of a submarine paleoseismological study that covers an exceptional ∼120 Kyr‐long period. We studied the sediments sampled in six up to 26 m‐long piston cores collected in deep fore‐arc basins located over the epicentral region of the 1843 earthquake. Using a multiproxy approach combining geophysical, geochemical, and sedimentological analysis, biostratigraphy and radiocarbon dating, we identified, characterized, and dated numerous event deposits that we then correlated with the sampled basins over an up to 160 km‐long area. We show that at least 33 earthquakes likely triggered these sediment remobilizations in the last 120 Kyr. Four of these events promoted exceptional deposits of turbidites + homogenites. From peak ground acceleration calculated for potential earthquakes occurring on various faults, and the absence of deposits linked to the historical earthquakes, we propose that the sources are likely megathrust earthquakes. Over the last 60 Kyr, we inferred at least three 15–25 Kyr‐long seismic cycles in which the recurrence times of earthquakes shortens from ∼5 to ∼2 Kyr.
dc.language.isoENen_US
dc.title.enSedimentary Records in the Lesser Antilles Fore‐Arc Basins Provide Evidence of Large Late Quaternary Megathrust Earthquakes
dc.typeArticle de revueen_US
dc.identifier.doi10.1029/2023GC011152en_US
dc.subject.halPlanète et Univers [physics]/Sciences de la Terreen_US
bordeaux.journalGeochemistry, Geophysics, Geosystemsen_US
bordeaux.volume25en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.issue2en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamGEOLSEDen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcehal
hal.identifierhal-04436131
hal.version1
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exportfalse
workflow.import.sourcehal
dc.rights.ccCC BY-NC-SAen_US
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Geochemistry,%20Geophysics,%20Geosystems&rft.date=2024-01-31&rft.volume=25&rft.issue=2&rft.au=SEIBERT,%20Chlo%C3%A9&FEUILLET,%20Nathalie&RATZOV,%20G.&BECK,%20Christian&MORENA,%20P.&rft.genre=article


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