FN Archimer Export Format
PT J
TI Sedimentary Records in the Lesser Antilles Fore‐Arc Basins Provide Evidence of Large Late Quaternary Megathrust Earthquakes
BT 
AF Seibert, C.
   Feuillet, N.
   Ratzov, Gueorgui
   Beck, C.
   Morena, Pierre
   Johannes, L.
   Ducassou, E.
   Cattaneo, Antonio
   Goldfinger, C.
   Moreno, E.
   Bieber, A.
   Bénâtre, G.
   Caron, B.
   Caron, M.
   Casse, M.
   Cavailhes, T.
   Del Manzo, G.
   Deschamps, C. E.
   Desiage, P. A.
   Duboc, Q.
   Fauquembergue, K.
   Ferrant, Anthony
   Guyard, H.
   Jacques, E.
   Laurencin, M.
   Leclerc, F.
   Patton, J.
   Saurel, J. M.
   St‐Onge, G.
   Woerther, Patrice
AS 1:1,2;2:1;3:3;4:4;5:3,5,6;6:7;7:8;8:5;9:9;10:10;11:1,11;12:1;13:12;14:11;15:11;16:8;17:1;18:11;19:11;20:11;21:8;22:13;23:1;24:1;25:14;26:3;27:9;28:1;29:11;30:13;
FF 1:;2:;3:;4:;5:PDG-REM-GM-LAD;6:;7:;8:PDG-REM-GEOOCEAN-ALMA;9:;10:;11:;12:;13:;14:;15:;16:;17:;18:;19:;20:;21:;22:PDG-REM-RDT;23:;24:;25:;26:;27:;28:;29:;30:PDG-REM-RDT-SIIM;
C1 Université de Paris Cité Institut de Physique du Globe de Paris CNRS Paris, France
   Lamont‐Doherty Earth Observatory of Columbia University Palisades NY ,USA
   Université Côte d'Azur CNRS, IRD Observatoire de la Côte d'Azur Géoazur Nice, France
   ISTerre, CNRS Université Savoie‐Mont‐Blanc Le Bourget du Lac ,France
   IFREMER, Geo‐Ocean UMR6538, Plouzané ,France
   Université de Brest LGO UMR 6538, Plouzané ,France
   Muséum National d'Histoire Naturelle, UMR 7207, Département Histoire de la Terre Paris ,France
   Université de Bordeaux, UMR CNRS 5805 EPOC Pessac,France
   College of Earth, Ocean, and Atmospheric Sciences Oregon State University Corvallis OR ,USA
   Laboratoire d’Océanographie et du Climat (LOCEAN) Sorbonne Université/CNRS/IRD/MNHN Paris ,France
   Institut des sciences de la mer de Rimouski (ISMER) Canada Research Chair in Marine Geology Université du Québec à Rimouski (UQAR) and GEOTOP Rimouski QC ,Canada
   Sorbonne Université CNRS‐INSU Institut des Sciences de la Terre de Paris ISTeP UMR 7193 Paris ,France
   Unité Recherche et Développements Technologiques Ifremer Plouzané ,France
   Laboratoire d’Océanologie et Géosciences Université de Lille Villeneuve d’Ascq, France
C2 UNIV PARIS CITE, FRANCE
   UNIV COLUMBIA, USA
   UNIV NICE, FRANCE
   CNRS, FRANCE
   IFREMER, FRANCE
   UBO, FRANCE
   MNHN, FRANCE
   UNIV BORDEAUX, FRANCE
   UNIV OREGON STATE, USA
   UNIV SORBONNE, FRANCE
   UNIV QUEBEC (UQAR), CANADA
   UNIV SORBONNE, FRANCE
   IFREMER, FRANCE
   UNIV LILLE, FRANCE
SI BREST
SE PDG-REM-GM-LAD
   PDG-REM-GEOOCEAN-ALMA
   PDG-REM-RDT
   PDG-REM-RDT-SIIM
UM GEO-OCEAN
IN WOS Ifremer UPR
   WOS Ifremer UMR
   WOS Cotutelle UMR
   DOAJ
   copubli-france
   copubli-univ-france
   copubli-int-hors-europe
IF 3.5
TC 0
UR https://archimer.ifremer.fr/doc/00875/98723/108226.pdf
   https://archimer.ifremer.fr/doc/00875/98723/108227.docx
LA English
DT Article
CR CASEIS
   ESS_K-16-ATA
BO Pourquoi pas ?
   L'Atalante
DE ;submarine paleoseismology;Lesser Antilles;turbidites;homogenites
AB 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. 
PY 2024
PD FEB
SO Geochemistry Geophysics Geosystems
SN 1525-2027
PU American Geophysical Union (AGU)
VL 25
IS 2
UT 001154186100001
DI 10.1029/2023GC011152
ID 98723
ER

EF