FN Archimer Export Format PT J TI Analysis of slope failures in submarine canyon heads: An example from the Gulf of Lions BT AF SULTAN, Nabil GAUDIN, Mathieu BERNE, Serge CANALS, Miquel URGELES, Roger LAFUERZA, Sara AS 1:1;2:1,2;3:1;4:3;5:3;6:3; FF 1:PDG-DOP-DCB-GM-LES;2:PDG-DOP-DCB-GM-LES;3:PDG-DOP-DCB-GM-LES;4:;5:;6:; C1 IFREMER, Dept Geosci Marines, F-29280 Plouzane, France. Univ Bordeaux 1, Dept Geol & Oceanog, Talence, France. Univ Barcelona, GRC Geociencies Marines, Dept Estratig Paleontol & Geociencies, Barcelona, Spain. C2 IFREMER, FRANCE UNIV BORDEAUX, FRANCE UNIV BARCELONA, SPAIN SI BREST SE PDG-DOP-DCB-GM-LES IN WOS Ifremer jusqu'en 2018 copubli-france copubli-europe copubli-univ-france IF 2.953 TC 45 UR https://archimer.ifremer.fr/doc/2007/publication-2410.pdf LA English DT Article CR GMO2 - CARNAC PROMESS 1 STRATAFORM 1 BO Le SuroƮt Bavenit DE ;cascadia accretionary complex;upper bound theorem;stability analysis;continental slope;limit equilibrium;western gulf;offshore;margin;initiation;sediment AB To improve understanding of evolution of submarine canyons, a three-dimensional slope-stability model is applied to Bourcart Canyon in the western Gulf of Lions in the Mediterranean Sea. The model builds on previous work by Chen and others, and it uses the upper bound theorem of plasticity to calculate the factor of safety of a kinematically admissible failing mass. Examples of three-dimensional failure surfaces documented in the literature were used to test the model formulation. Model application to Bourcart Canyon employed the results of a detailed stratigraphic analyses based on data acquired by swath bathymetry, sub-bottom profiling, high-resolution seismic reflection surveys, and piston coring. The sediment layers were also characterized using in-situ geotechnical measurements and laboratory tests. The effects of three loading scenarios were analyzed: (1) earthquake shaking, (2) hemipelagic sedimentation, and (3) axial incision. These three mechanisms influenced the predicted volumes and shapes of slope failures along the flanks of Bourcart Canyon, and comparison of these predictions with failure geometries inferred from seafloor morphology showed that mass failures could account for the observed morphology along the canyon walls as well as a mechanism of canyon widening PY 2007 PD MAR SO Journal of Geophysical Research ( JGR ) - Earth surface SN 0148-0227 PU American Geophysical Union VL 112 IS 112-F1 UT 000245018400001 DI 10.1029/2005JF000408 ID 2410 ER EF