Redistribution of Sediments by Submarine Landslides on the Eastern Nankai Accretionary Prism

Kawamura, Kazutaka; Kanamatsu, Toshiya; Kinoshita, Masataka; Saito, Saneatsu; Shibata, Tadahiro; Fujino, Keiko; Misawa, Ayanori; Burmeister, Kurtis C.

doi:10.1007/978-90-481-3071-9_26

Cited by 7 publications

(7 citation statements)

References 10 publications

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“…The products of comparable processes are observed in bathymetric data of the modern prism toe environment. Frontal collapses of different sizes and scales create embayment structures and hummocky deposits that deflect the trench's axial channel to a more seaward position [ Kawamura et al , 2010]. A long‐lasting deflection or complete blockage of axial transport systems may also help to explain why the uppermost part of accretionary prism is anomalously mudstone rich at Sites C0001 and C0004 [ Expedition 315 Scientists , 2009a; Expedition 316 Scientists , 2009c].…”

Section: Discussionmentioning

confidence: 99%

“…These outcrop studies, paired with numerical and analog modeling, also document the influence of rapid mass redistribution on thrust wedge mechanics and, in turn, on the structural evolution of the margin [e.g., Camerlenghi and Pini, 2009;Smit et al, 2010;Yamada et al, 2010]. [4] Along the Nankai margin, which is the focus of this paper, many products of submarine mass movements have been identified in geophysical or core data [Ashi and Taira, 1992;Cochonat et al, 2002;Henry et al, 2002;Underwood et al, 2003b;Martin et al, 2004;McAdoo et al, 2004;Moore et al, 2007Moore et al, , 2009; Kinoshita et al, 2009;Kawamura et al, 2009Kawamura et al, , 2010Strasser et al, 2009;Kimura et al, 2011]. In this study, we investigate multiple lines of evidence for slope failure at var-ious scales, including (1) scars and MTDs in threedimensional (3-D) reflection seismic data and (2) erosional surfaces and chaotic deposits in cores drilled during Integrated Ocean Drilling Program (IODP) Expedition 316 [Kimura et al, 2008;Expedition 316 Scientists, 2009b, 2009c, 2009d, which are both part of the Nankai Trough Seismogenic Zone Experiment (NanTroSEIZE) [Tobin and Kinoshita, 2006].…”

Section: Introductionmentioning

confidence: 99%

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Slumping and mass transport deposition in the Nankai fore arc: Evidence from IODP drilling and 3‐D reflection seismic data

Strasser

Moore

Kimura

et al. 2011

Geochem Geophys Geosyst

110

154

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[1] Multiple lines of evidence exist for a range of sediment mass movement processes within the shallow megasplay fault zone (MSFZ) area and the adjacent slope basin in the outer fore arc of the Nankai subduction zone, Japan. Diagnostic features observed in three-dimensional reflection seismic data and in cores of the Integrated Ocean Drilling Program (IODP) document a multifarious mass movement history spanning ∼2.87 million years. Various modes and scales of sediment remobilization can be related to the different morphotectonic settings in which they occurred. From this evidence, we decipher the tectonic control on slumping and mass transport deposition in the Nankai fore arc. Three periods of intensified mass wasting coincided with pulses of enhanced activity on the splay fault: (1) an initial phase of juvenile out-of-sequence thrusting ∼1.95 to 1.7 Ma, (2) a reactivation phase between ∼1.55 and 1.24 Ma, and (3) at about 1 Ma, during a phase of uplift of the fore-arc high and motion along the MSFZ. We suggest that slope oversteepening, extensional stress regimes, and lateral transmission of fluid overpressures may have preconditioned the slope sediments to fail. Individual mass-wasting events may have been triggered by dynamic loading from earthquake waves and/or transient pulses of pore pressure along the splay fault. Overall, our results provide insights into the complicated interplay between tectonic and submarine mass movement processes. We demonstrate that detailed knowledge about the spatial and temporal distribution of submarine mass movements can be integrated into a holistic reconstruction of tectonostratigraphic evolution of accretionary margins.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Slumping and mass transport deposition in the Nankai fore arc: Evidence from IODP drilling and 3‐D reflection seismic data

Strasser

Moore

Kimura

et al. 2011

Geochem Geophys Geosyst

110

154

View full text Add to dashboard Cite

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“…The FTZ appears highly complex with a very steep slope (~10°) and a large embayment interpreted as slump scar possibly reflecting indentation by a recently subducted seamount (Screaton et al, 2009b). The deposits of this prism-toe collapse are found as irregular hummocky bathymetry seaward of the embayment, where the trench channel has been deflected significantly, likely caused by blockage of axial flow by mass-wasting deposits (Kawamura et al, 2010).…”

Section: Geological Setting the Nankai Accretionary Prism Along The Kmentioning

confidence: 99%

Data report: permeability, compressibility, stress state, and grain size of shallow sediments from Sites C0004, C0006, C0007, and C0008 of the Nankai accretionary complex

Kopf¹,

Strasser²,

Monsees³

et al. 2011

Proceedings of the IODP

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The Nankai Trough Seismogenic Zone Experiment is a multiexpedition project carried out in several stages by the Integrated Ocean Drilling Program. The first stage of the experiment included two cruises during which coring took place (Expeditions 315 and 316). We have studied grain size distribution in more than 600 specimens of cores from Sites C0001, C0002, C0004, and C0006-C0008 and correlated the distributions to the lithologies recovered, logging and logging-while-drilling data in nearby holes, and the overall tectonic setting. The two sites in the upper slope and Kumano Basin (Sites C0001 and C0002, respectively) show the smallest mean grain sizes, which are smaller in the accreted strata compared to the forearc basin or slope sediments. Further downslope (Sites C0004 and C0008), grain size variability is larger and lithologies range from slope apron, mass transport deposits, accreted mud/mudstones, and fault zone material, to underthrust hemipelagics. Surprisingly, the mass transport deposits at Site C0004 are fine grained, whereas their counterparts at Site C0008 slightly downslope are the coarsest within the recovered succession there. The two sites near the toe of the accretionary prism (Sites C0006 and C0007) provided the coarsest material recovered, namely the trench-slope transition facies and the uppermost accreted trench wedge facies. Mudstones from the underlying upper Shikoku Basin facies are well sorted, uniform, and fine grained. In general, the study provides a solid basis for more specialized sedimentological research and further reveals that (1) results of the measurements taken with the Coulter Counter LS200 laser particle analyzer are in good agreement with earlier onboard visual core description; (2) accuracy and reproducibility of the method is satisfactory given the very narrow error bars of repeat measurements on aliquots of a larger sediment sample; and (3) the mass transport deposits have distinct particle size distribution patterns, whereas fault gouge and other material from structural features cannot easily be distinguished from surrounding sediment by grain size analysis alone.

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“…the displacement of very important volumes of sediments and significantly modify the margins morphology and the submarine sediment dispersal pattern (Huppertz et al, 2010;Joanne et al, 2010;Kawamura et al, 2010;Mulder, 2011;Shipp et al, 2011).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…Though marine landslide volumes are up to three order of magnitude larger than their aerial counterparts (Hampton et al, 1996;Urgeles and Camerlenghi, 2013) and are major elements of sedimentary margin development, their contribution to deep-sea sediment routing is not well documented. As a consequence of their widespread occurrence in turbidite systems, landslides, mass transport deposits or mass transport complexes play a significant role in the topography of channels or slopes, affect the resulting accommodation space, the development and bifurcation of deep-sea channel, and in fine can control the routing and dispersal of sediment at the fan scale (Armitage et al, 2009;Bernhardt et al, 2012;Corella et al, 2016;Kawamura et al, 2010;Kneller et al, 2016;Ortiz-Karpf et al, 2015). However, a fundamental modification of a deep-sea sediment transport network by a single submarine mass transport deposit at continental margin scale seems unprecedented.…”

Section: Significance For Sediment Routing In the Submarine Realmmentioning

confidence: 99%

Major modification of sediment routing by a large Mass Transport Deposit in the Gulf of Lions (Western Mediterranean)

et al. 2019

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In the Gulf of Lions (Western Mediterranean), the emplacement of a large (160 km3) Mass Transport Deposit, the Rhone Western Mass Transport Deposit (RWMTD), at the base of slope, aside the Rhone deep-sea fan between 1800 and 2700 m water depth, resulted in a major modification of the sediment routing by clogging a drainage network and blocking at the base of slope sediments that were previously routed into the Valencia channel and the Balearic abyssal plain. The RWMTD was sourced from sediments of the western flank of the Rhone upper fan and the adjacent base of slope. The mass transport deposit is characterized by a transparent seismic facies and sediment cores show that it is composed of a stiff laminated muddy lithofacies characteristic of the Rhone fan turbidites with marked contorted beds indicative of remoulding. AMS radiocarbon dating shows that the RWMTD was emplaced between 19.9 and 21.5 ka cal BP. It is coeval, within dating uncertainties, with the emplacement of a megaturbidite in the Balearic Abyssal Plain and immediately predates a major avulsion of the Rhone turbidite channel that led to the emplacement of an avulsion lobe (the neofan) on top of the RWMTD. It is not possible to affirm a genetic link between these three major gravity events but one can argue that they share a common forcing in relation with massive turbiditic accumulation during the last sea-level lowstand at the end of the Last Glacial Maximum. This study outlines the importance of mass transport deposits in the building of turbidite systems and, more generally, the major control of mass wasting on the routing and dispersal of sediments across continental margins. Highlights ► Several mass wasting events occurred maybe simultaneously in the Gulf of Lions at the end of the last glacial maximum lowstand, between 19.5 and 21.7 ka cal BP. ► Submarine Mass Transport Deposits can radically modify sediment routing pathways on the continental slope and rise. ► Large Mass Transport Deposits (160 km3) can be obscured on the seabed where sedimentation rate is high.

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Redistribution of Sediments by Submarine Landslides on the Eastern Nankai Accretionary Prism

Cited by 7 publications

References 10 publications

Slumping and mass transport deposition in the Nankai fore arc: Evidence from IODP drilling and 3‐D reflection seismic data

Slumping and mass transport deposition in the Nankai fore arc: Evidence from IODP drilling and 3‐D reflection seismic data

Data report: permeability, compressibility, stress state, and grain size of shallow sediments from Sites C0004, C0006, C0007, and C0008 of the Nankai accretionary complex

Major modification of sediment routing by a large Mass Transport Deposit in the Gulf of Lions (Western Mediterranean)

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