TY - ECHAP
KW - Earth and Environmental Science
AU - Morelia Urlaub
AU - Antonis Zervos
AU - Peter Talling
AU - Doug Masson
AU - Chris Clayton
AU - Yasuhiro Yamada
AU - Kiichiro Kawamura
AU - Ken Ikehara
AU - Yujiro Ogawa
AU - Roger Urgeles
AU - David Mosher
AU - Jason Chaytor
AU - Michael Strasser
AU - Yasuhiro Yamada
AU - Kiichiro Kawamura
AU - Ken Ikehara
AU - Yujiro Ogawa
AU - Roger Urgeles
AU - David Mosher
AU - Jason Chaytor
AU - Michael Strasser
AB - Overpressure generation due to rapid sediment deposition can result in low effective stresses within the sediment column. It has been proposed that these large overpressures are the main preconditioning factor for causing large-scale submarine slope failure on passive continental margins, such as those in the Gulf of Mexico and offshore Norway. The rate of overpressure generation depends on the sedimentation rate, sediment compressibility and permeability. The Gulf of Mexico and the Norwegian continental slope have experienced comparatively high sediment input, but large-scale slope failure also occurs in locations with very low sedimentation rates such as the Northwest African continental margin. Here we show results from 2D numerical modelling of a 2\textdegree continental slope subjected to deposition rates of 0.15 m/ka. These results do not indicate any evidence for significant overpressure or slope instability. We conclude that factors other than overpressure must be fundamental for initiating slope failure, at least in locations with low sedimentation rates.
CY - Dordrecht
N2 - Overpressure generation due to rapid sediment deposition can result in low effective stresses within the sediment column. It has been proposed that these large overpressures are the main preconditioning factor for causing large-scale submarine slope failure on passive continental margins, such as those in the Gulf of Mexico and offshore Norway. The rate of overpressure generation depends on the sedimentation rate, sediment compressibility and permeability. The Gulf of Mexico and the Norwegian continental slope have experienced comparatively high sediment input, but large-scale slope failure also occurs in locations with very low sedimentation rates such as the Northwest African continental margin. Here we show results from 2D numerical modelling of a 2\textdegree continental slope subjected to deposition rates of 0.15 m/ka. These results do not indicate any evidence for significant overpressure or slope instability. We conclude that factors other than overpressure must be fundamental for initiating slope failure, at least in locations with low sedimentation rates.
PB - Springer Netherlands
PP - Dordrecht
PY - 2011
SN - 978-94-007-2162-3
SP - 277
EP - 287
TI - How Do \~2\textdegree Slopes Fail in Areas of Slow Sedimentation? A Sensitivity Study on the Influence of Accumulation Rate and Permeability on Submarine Slope Stability
UR - http://dx.doi.org/10.1007/978-94-007-2162-3_25
VL - 31
ER -