Tectonically-triggered sediment and carbon export to the Hadal zone

dc.contributor.author Bao, Rui
dc.contributor.author Strasser, Michael
dc.contributor.author McNichol, Ann P.
dc.contributor.author Haghipour, Negar
dc.contributor.author McIntyre, Cameron P.
dc.contributor.author Wefer, Gerold
dc.contributor.author Eglinton, Timothy I.
dc.date.accessioned 2018-01-26T16:32:55Z
dc.date.available 2018-01-26T16:32:55Z
dc.date.issued 2018-01-09
dc.description © The Author(s), 2018. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Nature Communications 9 (2018): 121, doi:10.1038/s41467-017-02504-1. en_US
dc.description.abstract Sediments in deep ocean trenches may contain crucial information on past earthquake history and constitute important sites of carbon burial. Here we present 14C data on bulk organic carbon (OC) and its thermal decomposition fractions produced by ramped pyrolysis/oxidation for a core retrieved from the >7.5 km-deep Japan Trench. High-resolution 14C measurements, coupled with distinctive thermogram characteristics of OC, reveal hemipelagic sedimentation interrupted by episodic deposition of pre-aged OC in the trench. Low δ13C values and diverse 14C ages of thermal fractions imply that the latter material originates from the adjacent margin, and the co-occurrence of pre-aged OC with intervals corresponding to known earthquake events implies tectonically triggered, gravity-flow-driven supply. We show that 14C ages of thermal fractions can yield valuable chronological constraints on sedimentary sequences. Our findings shed new light on links between tectonically driven sedimentological processes and marine carbon cycling, with implications for carbon dynamics in hadal environments. en_US
dc.description.sponsorship This study is supported by Doc.Mobility Fellowship (P1EZP2_159064) (R.B.) from the Swiss National Science Foundation (SNSF). This work is also supported by SNF “CAPS-LOCK” project 200021_140850 (T.I.E.), by SNSF grant (133481) (M.S.), and Austrian Science Foundation (P 29678-N28) (M.S.). en_US
dc.identifier.citation Nature Communications 9 (2018): 121 en_US
dc.identifier.doi 10.1038/s41467-017-02504-1
dc.identifier.uri https://hdl.handle.net/1912/9517
dc.language.iso en_US en_US
dc.publisher Nature Publishing Group en_US
dc.relation.uri https://doi.org/10.1038/s41467-017-02504-1
dc.rights Attribution 4.0 International *
dc.rights.uri http://creativecommons.org/licenses/by/4.0/ *
dc.subject Carbon cycle en_US
dc.subject Sedimentology en_US
dc.title Tectonically-triggered sediment and carbon export to the Hadal zone en_US
dc.type Article en_US
dspace.entity.type Publication
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