FN Archimer Export Format
PT J
TI Thermally-constrained fluid circulation and seismicity in the Lesser Antilles subduction zone
BT 
AF Ezenwaka, K.
   Marcaillou, B.
   Laigle, M.
   KLINGELHOEFER, Frauke
   Lebrun, J.-F.
   Paulatto, M.
   Biari, Y.
   Rolandone, F.
   Lucazeau, F.
   Heuret, A.
   Pichot, T.
   Bouquerel, H.
AS 1:1;2:1;3:1;4:2;5:3;6:4;7:1,5;8:6;9:7;10:8;11:9;12:7;
FF 1:;2:;3:;4:PDG-REM-GEOOCEAN-ALMA;5:;6:;7:;8:;9:;10:;11:;12:;
C1 Université Côte d'Azur, CNRS, Observatoire de la Côte d'Azur, IRD, Géoazur, Valbonne, France
   Geo-Ocean, Univ Brest, CNRS, Ifremer, UMR6538, F-29280 Plouzane, France
   Géosciences Montpellier, Université de Montpellier, CNRS, Université des Antilles, Pointe à Pitre, Guadeloupe (FWI), France
   Imperial College London, Department of Earth Science and Engineering, Prince Consort Road, UK
   Capgemini – Oil & Gas Centre of Excellence, Technopole Hélioparc Bâtiment Newton, 4 Rue Jules Ferry, 64000, Pau, France
   Sorbonne Université, CNRS, Institut des Sciences de la Terre de Paris, ISTeP UMR 7193, Paris, France
   Université de Paris, Institut de physique du globe de Paris, CNRS, Paris, France
   Université de Guyane, Géosciences Montpellier (UMR 5243), Cayenne, 97300, France
   Beicip-Franlab, 232 avenue Napoleon Bonaparte Rueil-Malmaison, Paris 92500, France
C2 UNIV NICE, FRANCE
   IFREMER, FRANCE
   UNIV MONTPELLIER, FRANCE
   IMPERIAL COLL LONDON, UK
   CAPGEMINI, FRANCE
   UNIV SORBONNE, FRANCE
   IPGP, FRANCE
   UNIV GUYANE, FRANCE
   BEICIP-FRANLAB, FRANCE
SI BREST
SE PDG-REM-GEOOCEAN-ALMA
UM GEO-OCEAN
IN WOS Ifremer UMR
   copubli-france
   copubli-europe
   copubli-univ-france
IF 5.3
TC 2
UR https://archimer.ifremer.fr/doc/00795/90739/96505.pdf
LA English
DT Article
CR ANTITHESIS 3
   ANTITHESIS LEG1
   ANTITHESIS LEG2
   SISMANTILLES 2
BO Pourquoi pas ?
   L'Atalante
DE ;thermal modelling;heat-flow;Lesser Antilles;subduction zone;seismogenic zone;serpentinite dehydration reaction
AB At subduction zones, fluid circulation and elevated pore pressure are key factors controlling the seismogenic behavior along the plate interface by reducing absolute fault strength, increasing the time return of high magnitude co-seismic rupture and favoring aseismic slip. The Lesser Antilles is an end-member subduction zone where the slow subduction of numerous trans-oceanic fracture zones and patches of pervasively fractured, hydrated and serpentinized exhumed mantle rocks increase the water input. Heat-flow variations measured in the trench and the forearc during the Antithesis 1 cruise reveal heat advection by fluid circulation and shed a new light onto the thermal control of seismicity location in the subduction zone. In the Northern Lesser Antilles, heat-flow anomalies, negative in the trench and positive in the forearc, reveal a ventilated fluid circulation with downward percolation of cold fluids at the sediment-starved, pervasively fractured trench and upward discharge of warm fluids through the Tintamarre Fault Zone in the forearc. In contrast, in the Central Lesser Antilles, a positive heat-flow anomaly at the trench and the accretionary wedge is typical of an insulated fluid circulation where warm fluids invade the plate interface flowing updip from the subduction depths up to the trench. The investigated margin segments correspond with a very low number of interplate thrust earthquakes, illustrating the frequent statement that fluids in subduction zones tend to reduce the interplate coupling, favor slow to aseismic slip behavior, and increase the time return of large seismic events. Moreover, the location of intraslab, and supraslab earthquakes at depth beneath the Central Lesser Antilles suggest a close relation to temperature-related dehydration reactions. 
PY 2022
PD NOV
SO Earth And Planetary Science Letters
SN 0012-821X
PU Elsevier
VL 597
UT 000874534700001
DI 10.1016/j.epsl.2022.117823
ID 90739
ER

EF