Slope failure dynamics and impacts from seafloor and shallow sub-seafloor geophysical data: case studies from the COSTA project

Canals, Miquel; Lastras, Galderic; Úrgeles, Roger; Casamor, J. L.; Mienert, Jürgen; Cattaneo, Antonio; Batist, Marc De; Haflidason, Haflidi; Imbo, Y.; Laberg, Jan Sverre; Locat, Jacques; Long, David A.; Longva, Oddvar; Masson, D.G.; Sultan, Nabil; Trincardi, Fabio; Bryn, Petter

doi:10.1016/j.margeo.2004.10.001

Cited by 363 publications

(259 citation statements)

References 139 publications

Supporting

Mentioning

240

Contrasting

Unclassified

Order By: Relevance

“…It is suggested that a specific slope-failure trigger is required in order to overcome the shear strength of the sediment (Popenoe et al, 1993;Mc Gregor et al, 1993;Hampton et al, 1996;Locat & Lee, 2002;Canals et al, 2004;Owen et al, 2007;Masson et al, 2005;Lee, 2009). Seismic events are considered the most common trigger for slope failures (Hampton et al, 1996;Locat & Lee, 2002;Canals et al, 2004 and references therein; Masson et al, 2005;Owen et al, 2007;Lee, 2009).…”

Section: Causes For Slope Failurementioning

confidence: 99%

“…Seismic events are considered the most common trigger for slope failures (Hampton et al, 1996;Locat & Lee, 2002;Canals et al, 2004 and references therein; Masson et al, 2005;Owen et al, 2007;Lee, 2009). Since important faults in the study area are supposed to have been inactive from Early Cretaceous onwards (Ziegler, 1990), large-scale tectonics has not been considered an important triggering factor for the studied slope failure events.…”

Section: Causes For Slope Failurementioning

confidence: 99%

See 1 more Smart Citation

Late Cenozoic shelf delta development and Mass Transport Deposits in the Dutch offshore area – results of 3D seismic interpretation

Benvenuti

Kombrink

Veen

et al. 2012

Netherlands Journal of Geosciences

View full text Add to dashboard Cite

In this study, seismic stratigraphic criteria have been used to characterise the evolution of the Southern North Sea (SNS) shelf-delta system that progressively filled the Southern North Sea basin during Plio-Pleistocene times. Based on the prograding and down-stepping architecture of the shelf-delta sequence it is inferred that deposition occurred during a time of high sediment supply and overall sea-level lowering. During this time the delta slopes failed several times, creating at least 30 internally coherent Mass Transport Deposits (MTDs) mainly grouped in common areas, affecting the same clinoform set and partially sharing the basal shear surface (groups of MTDs). The most important features of the studied MTDs are 1) the dominance of brittle deformation; 2) the small amount of material removal from the headwall domain (lack of completely depleted areas above the basal shear surface); and 3) the lack of an emergent toe domain above the un-failed sediment located basinward, although proper confining geometries for the MTD are not detected. Therefore, the studied MTDs can neither be classified as frontally confined nor as frontally emergent but they are a new intermediate type of submarine landslides which has not been described before. These characteristics suggest that the mass movement ceased relatively soon after initiation of failure. Incisions on top of the MTDs suggest the presence of erosive flows. These flows were probably generated due to a concentration of the drainage in the negative morphology the failure event left behind in the upper sector of the slope. The stronger progradational character of the reflections on top of MTDs confirms a concentration of drainage after the erosional phase too. The interplay between high sediment supply and constant or even decreasing accommodation space (caused by constant or decreasing sealevel) is supposed to be the main precondition for slope instability for most of the MTDs in this study area. Slope failures themselves can also be considered a preconditioning factor by the creation of local very high sedimentation rates (see groups of MTDs). Salt-induced seismicity and storm waves' effect superimposed on high frequency sea level fall are considered the most important triggering factors

show abstract

Section: Causes For Slope Failurementioning

confidence: 99%

Section: Causes For Slope Failurementioning

confidence: 99%

Late Cenozoic shelf delta development and Mass Transport Deposits in the Dutch offshore area – results of 3D seismic interpretation

Benvenuti

Kombrink

Veen

et al. 2012

Netherlands Journal of Geosciences

View full text Add to dashboard Cite

show abstract

“…These parameters were chosen to illustrate the impact of basal resistance, and represent a relatively short slide on a steep slope (Canals et al 2004). The coefficients C m and C d were taken to be unity .…”

Section: Initial Slide Kinematicsmentioning

confidence: 99%

Role Of Soil Behavior On The Initial Kinematics Of Tsunamigenic Slides

Bradshaw

Grilli

Baxter

et al. 2007

Submarine Mass Movements and Their Consequences

View full text Add to dashboard Cite

Recent investigations on tsunami generation from submarine mass failures show that one of the most important factors influencing the source characteristics of the wave is the initial acceleration of the failure itself. In a number of these studies, a translational slide is modeled as a rigid body sliding down an inclined plane and basal resistance is neglected. In this paper, a similar rigid body model is proposed that incorporates basal resistance, which is related to the shear strength of the soil. Initial slide kinematics were investigated under two triggering mechanisms including overpressures at depth and rapid sedimentation. The model results show that soil behavior significantly influences the acceleration time history as well as the magnitude of the peak acceleration. The slide kinematics depend largely on the initial stress state and on the undrained residual shear strength of the soil along a potential failure surface, which highlights the importance of performing detailed geotechnical site investigations when assessing these geohazards. More research is needed to determine the influence of using more realistic basal friction models on the initial wave heights generated by submarine mass failures.

show abstract

“…Although, for obvious industrial reasons, turbidites have received the most attention during the past decades, the more recent acquisition of high-resolution three-dimensional (3-D) seismic data has shown that many slope and abyssal systems comprise a very significant portion of MTCs. In some settings around the world, up to 70-90% of the entire slope and deepwater stratigraphic record is composed of MTCs and associated deposits (Canals et al, 2004;Newton et al, 2004;Moscardelli, 2007;Madof et al, 2009;Beaubouef and Abreu, 2010;Posamentier and Martinsen, 2011). Although numerous geoscientists use the terms MTDs and MTCs interchangeably, in this study we define a MTC as a depositional architectural complex comprised of several coeval or closely chronological-and genetically-related masstransport deposits (MTDs)-i.e.…”

Section: Chapter 1: Introductionmentioning

confidence: 99%

Fabric Development and Pore-Throat Reduction in a Mass-Transport Deposit in the Jubilee Gas Field, Eastern Gulf of Mexico: Consequences for the Sealing Capacity of MTDs

Cardona

Wood

Day-Stirrat

et al. 2016

Submarine Mass Movements and Their Consequences

View full text Add to dashboard Cite

show abstract

Slope failure dynamics and impacts from seafloor and shallow sub-seafloor geophysical data: case studies from the COSTA project

Cited by 363 publications

References 139 publications

Late Cenozoic shelf delta development and Mass Transport Deposits in the Dutch offshore area – results of 3D seismic interpretation

Late Cenozoic shelf delta development and Mass Transport Deposits in the Dutch offshore area – results of 3D seismic interpretation

Role Of Soil Behavior On The Initial Kinematics Of Tsunamigenic Slides

Fabric Development and Pore-Throat Reduction in a Mass-Transport Deposit in the Jubilee Gas Field, Eastern Gulf of Mexico: Consequences for the Sealing Capacity of MTDs

Contact Info

Product

Resources

About