A slump in the trench: Tracking the impact of the 2011 Tohoku-Oki earthquake

M. Strasser; M. Kölling; C. dos Santos Ferreira; H.G. Fink; T. Fujiwara; S. Henkel; K. Ikehara; T. Kanamatsu; K. Kawamura; S. Kodaira; M. Römer; G. Wefer; R/V Sonne Cruise SO219A; JAMSTEC Cruise MR12-E01 scientists

doi:10.1130/G34477.1

A slump in the trench: Tracking the impact of the 2011 Tohoku-Oki earthquake

M. Strasser, M. Kölling, C. dos Santos Ferreira, H.G. Fink, T. Fujiwara, S. Henkel, K. Ikehara, T. Kanamatsu, K. Kawamura, S. Kodaira, M. Römer, G. Wefer, R/V Sonne Cruise SO219A, JAMSTEC Cruise MR12-E01 scientists

Earth Resources Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

We present differential bathymetry and sediment core data from the Japan Trench, sampled after the 2011 Tohoku-Oki (offshore Japan) earthquake to document that prominent bathymetric and structural changes along the trench axis relate to a large (∼27.7 km2) slump in the trench. Transient geochemical signals in the slump deposit and analysis of diffusive re-equilibration of disturbed SO42– profiles over time constrain the triggering of the slump to the 2011 earthquake. We propose a causal link between earthquake slip to the trench and rotational slumping above a subducting horst structure. We conclude that the earthquake-triggered slump is a leading agent for accretion of trench sediments into the forearc and hypothesize that forward growth of the prism and seaward advance of the deformation front by more than 2 km can occur, episodically, during a single-event, large mega-thrust earthquake.

Original language	Undefined/Unknown
Pages (from-to)	935-938
Number of pages	4
Journal	Geology
Volume	41
Issue number	8
DOIs	https://doi.org/10.1130/G34477.1
Publication status	Published - Aug 1 2013

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10.1130/G34477.1

https://doi.org/10.1130/G34477.1

Cite this

@article{e80e11d9a4e344279413acd995f7c87e,

title = "A slump in the trench: Tracking the impact of the 2011 Tohoku-Oki earthquake",

abstract = "We present differential bathymetry and sediment core data from the Japan Trench, sampled after the 2011 Tohoku-Oki (offshore Japan) earthquake to document that prominent bathymetric and structural changes along the trench axis relate to a large (∼27.7 km2) slump in the trench. Transient geochemical signals in the slump deposit and analysis of diffusive re-equilibration of disturbed SO42– profiles over time constrain the triggering of the slump to the 2011 earthquake. We propose a causal link between earthquake slip to the trench and rotational slumping above a subducting horst structure. We conclude that the earthquake-triggered slump is a leading agent for accretion of trench sediments into the forearc and hypothesize that forward growth of the prism and seaward advance of the deformation front by more than 2 km can occur, episodically, during a single-event, large mega-thrust earthquake.",

author = "M. Strasser and M. K{\"o}lling and Ferreira, {C. dos Santos} and H.G. Fink and T. Fujiwara and S. Henkel and K. Ikehara and T. Kanamatsu and K. Kawamura and S. Kodaira and M. R{\"o}mer and G. Wefer and SO219A, {R/V Sonne Cruise} and scientists, {JAMSTEC Cruise MR12-E01}",

year = "2013",

month = aug,

day = "1",

doi = "10.1130/G34477.1",

language = "未定義/不明",

volume = "41",

pages = "935--938",

journal = "Geology",

issn = "0091-7613",

publisher = "Geological Society of America",

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TY - JOUR

T1 - A slump in the trench: Tracking the impact of the 2011 Tohoku-Oki earthquake

AU - Strasser, M.

AU - Kölling, M.

AU - Ferreira, C. dos Santos

AU - Fink, H.G.

AU - Fujiwara, T.

AU - Henkel, S.

AU - Ikehara, K.

AU - Kanamatsu, T.

AU - Kawamura, K.

AU - Kodaira, S.

AU - Römer, M.

AU - Wefer, G.

AU - SO219A, R/V Sonne Cruise

AU - scientists, JAMSTEC Cruise MR12-E01

PY - 2013/8/1

Y1 - 2013/8/1

N2 - We present differential bathymetry and sediment core data from the Japan Trench, sampled after the 2011 Tohoku-Oki (offshore Japan) earthquake to document that prominent bathymetric and structural changes along the trench axis relate to a large (∼27.7 km2) slump in the trench. Transient geochemical signals in the slump deposit and analysis of diffusive re-equilibration of disturbed SO42– profiles over time constrain the triggering of the slump to the 2011 earthquake. We propose a causal link between earthquake slip to the trench and rotational slumping above a subducting horst structure. We conclude that the earthquake-triggered slump is a leading agent for accretion of trench sediments into the forearc and hypothesize that forward growth of the prism and seaward advance of the deformation front by more than 2 km can occur, episodically, during a single-event, large mega-thrust earthquake.

AB - We present differential bathymetry and sediment core data from the Japan Trench, sampled after the 2011 Tohoku-Oki (offshore Japan) earthquake to document that prominent bathymetric and structural changes along the trench axis relate to a large (∼27.7 km2) slump in the trench. Transient geochemical signals in the slump deposit and analysis of diffusive re-equilibration of disturbed SO42– profiles over time constrain the triggering of the slump to the 2011 earthquake. We propose a causal link between earthquake slip to the trench and rotational slumping above a subducting horst structure. We conclude that the earthquake-triggered slump is a leading agent for accretion of trench sediments into the forearc and hypothesize that forward growth of the prism and seaward advance of the deformation front by more than 2 km can occur, episodically, during a single-event, large mega-thrust earthquake.

U2 - 10.1130/G34477.1

DO - 10.1130/G34477.1

M3 - 学術誌

SN - 0091-7613

VL - 41

SP - 935

EP - 938

JO - Geology

JF - Geology

IS - 8

ER -