Physical properties, pore water geochemistry, 210Pb-dating of sediment cores GeoB16426-1, GeoB16427-1, GeoB16429-1

doi:doi:10.1594/PANGAEA.819521

Physical properties, pore water geochemistry, 210Pb-dating of sediment cores GeoB16426-1, GeoB16427-1, GeoB16429-1

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.

BibTex:

@dataset{Strasser_Michael_and_Kölling_Martin_and_dos_Santos_Ferreira_Christian_and_Fink_Hiske_G_and_Fujiwara_Toshiya_and_Henkel_Susann_and_Ikehara_Ken_and_Kanamatsu_Toshiya_and_Kawamura_Kiichiro_and_Kodaira_Shuichi_and_Römer_Miriam_and_Wefer_Gerold_and_R/V_Sonne_Cruise_SO219A_scientists__and_JAMSTEC_Cruise_MR12-E01_scientists__2013,
    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 km**2) slump in the trench. Transient geochemical signals in the slump deposit and analysis of diffusive re-equilibration of disturbed SO4**2- 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 = {Strasser, Michael and Kölling, Martin and dos Santos Ferreira, Christian and Fink, Hiske G and Fujiwara, Toshiya and Henkel, Susann and Ikehara, Ken and Kanamatsu, Toshiya and Kawamura, Kiichiro and Kodaira, Shuichi and Römer, Miriam and Wefer, Gerold and R/V Sonne Cruise SO219A scientists,  and JAMSTEC Cruise MR12-E01 scientists, },
    doi = {10.1594/PANGAEA.819521},
    institution = {PANGAEA (Lithosphere)},
    title = {Physical properties, pore water geochemistry, 210Pb-dating of sediment cores GeoB16426-1, GeoB16427-1, GeoB16429-1},
    url = {https://service.tib.eu/ldmservice/vdataset/png-doi-10-1594-pangaea-819521},
    year = {2013}
}