FN Archimer Export Format
PT J
TI Sea-level fluctuations control the distribution of highly liquefaction-prone layers on volcanic-carbonate slopes
BT 
AF Sultan, Nabil
   Jouet, Gwenael
   Riboulot, Vincent
   Terzariol, Marco
   Garziglia, Sebastien
   Cattaneo, Antonio
   Giraudeau, J.
   Jorry, Stephan
AS 1:1;2:1;3:1;4:1;5:1;6:1;7:2;8:1;
FF 1:PDG-REM-GEOOCEAN-ALMA;2:PDG-REM-GEOOCEAN-ASTRE;3:PDG-REM-GEOOCEAN-ALMA;4:PDG-REM-GEOOCEAN-ALMA;5:PDG-REM-GEOOCEAN-ALMA;6:PDG-REM-GEOOCEAN-ALMA;7:;8:PDG-REM-GEOOCEAN-ASTRE;
C1 Geo-Ocean, UMR6538, Ifremer, CNRS, UBO, UBS, 29280 Plouzané, France
   Environnements et Paléoenvironnements Océaniques et Continentaux (EPOC), UMR 5805, Université de Bordeaux, CNRS, 33615 Pessac CEDEX, France
C2 IFREMER, FRANCE
   UNIV BORDEAUX, FRANCE
SI BREST
SE PDG-REM-GEOOCEAN-ALMA
   PDG-REM-GEOOCEAN-ASTRE
UM GEO-OCEAN
IN WOS Ifremer UMR
   copubli-france
   copubli-univ-france
IF 5.8
TC 0
UR https://archimer.ifremer.fr/doc/00822/93403/100233.pdf
LA English
DT Article
CR MAYOBS
   MAYOBS19
   MD 228 / MAYOBS15
BO Pourquoi pas ?
   Marion Dufresne
AB Understanding and quantifying the hazards related to earthquake-induced submarine liquefaction and landslides are particularly significant offshore of tropical volcanic-carbonate islands, where carbonate production competes with volcanism to create highly contrasted lithological successions. To improve the detection of liquefaction-prone layers, we analyzed physical properties and mineralogy and performed 70 dynamic triaxial tests on 25 sediment cores offshore of the eastern side of Mayotte (Comoros archipelago in the western Indian Ocean) in an area that has experienced significant seismicity since 2018. We found that the main parameter controlling the liquefaction potential offshore of Mayotte is the presence of low-density layers with high calcite content accumulating along the slope during lowstands. This phasing with sea-level fluctuations implies a significant recurrent geohazard for tropical volcanic-carbonate islands worldwide. Furthermore, the relationship we found between the cyclic resistance of sediment and its density and magnetic susceptibility represents a time-effective approach for identifying the hazards related to earthquake-induced liquefaction. 
PY 2023
PD APR
SO Geology
SN 0091-7613
PU Geological Society of America
VL 51
IS 4
UT 001006021400016
BP 402
EP 407
DI 10.1130/G50785.1
ID 93403
ER

EF