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| Sultan, Nabil; Gaudin, Mathieu; Berne, Serge; Canals, Miquel; Urgeles, Roger; Lafuerza, Sara. |
| 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... |
| Tipo: Text |
Palavras-chave: Cascadia accretionary complex; Upper bound theorem; Stability analysis; Continental slope; Limit equilibrium; Western gulf; Offshore; Margin; Initiation; Sediment. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-2410.pdf |
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| Sultan, Nabil; Lafuerza, Sara. |
| L’excès de pression interstitielle a un effet significatif sur la stabilité des pentes sous-marines et sur la déformation des sédiments, alors sa mesure in-situ à l’équilibre est cruciale pour réaliser des évaluations exactes de la stabilité des pentes et pour dériver adéquatement les paramètres géotechniques de conception. La pression interstitielle in-situ à l’équilibre est généralement obtenue à partir de la diminution de la pression interstitielle lors d’essais en piézocône. Cependant, les plateaux et pentes sous-marins sont souvent caractérisés par l’existence de sédiments à faible perméabilité (à granulométrie fine) qui engendrent des tests de dissipation de longue durée, ce qui représente une problématique pour les coûts d’opération en mer. Ainsi,... |
| Tipo: Text |
Palavras-chave: Cavity expansion; Dissipation tests; Marine sediment; Piezoprobe; Pore-water pressure. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00198/30926/29346.pdf |
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| D'Acremont, E.; Lafosse, M.; Rabaute, A.; Teurquety, G.; Do Couto, D.; Ercilla, G.; Juan, C.; Mercier De Lépinay, B.; Lafuerza, Sara; Galindo‐zaldivar, J.; Estrada, F.; Vazquez, J.t.; Leroy, S.; Poort, J.; Ammar, A.; Gorini, C.. |
| Since the Miocene, the thinned continental crust below the Alboran Sea as well as its overlying sedimentary cover have been undergoing deformation caused by both convergence of Eurasia and Africa and by deep processes related to the Tethyan slab retreat. Part of this deformation is recorded at the Xauen and Tofiño banks in the southern Alboran Sea. Using swath bathymetry and multichannel seismic reflection data, we identified different stages and styles of deformation. The South Alboran Basin is made up of Early Miocene to Pliocene sedimentary layers that correlate with the West Alboran Basin depocenter and are dominated by E‐W trending folds and thrusts. The Xauen and Tofiño Banks first recorded the phase of extension and strike‐slip movement during the... |
| Tipo: Text |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00612/72436/71382.pdf |
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