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Tectonically-triggered sediment and carbon export to the Hadal zone

Author

Listed:
  • Rui Bao

    (ETH Zurich
    Woods Hole Oceanographic Institute
    Harvard University)

  • Michael Strasser

    (ETH Zurich
    University of Innsbruck
    MARUM-Center for Marine Environmental Sciences University of Bremen)

  • Ann P. McNichol

    (Woods Hole Oceanographic Institute)

  • Negar Haghipour

    (ETH Zurich)

  • Cameron McIntyre

    (ETH Zurich
    ETH Zurich
    Scottish Universities Environmental Research Centre)

  • Gerold Wefer

    (MARUM-Center for Marine Environmental Sciences University of Bremen)

  • Timothy I. Eglinton

    (ETH Zurich)

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.

Suggested Citation

  • Rui Bao & Michael Strasser & Ann P. McNichol & Negar Haghipour & Cameron McIntyre & Gerold Wefer & Timothy I. Eglinton, 2018. "Tectonically-triggered sediment and carbon export to the Hadal zone," Nature Communications, Nature, vol. 9(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-017-02504-1
    DOI: 10.1038/s41467-017-02504-1
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    Cited by:

    1. Anna Sobek & Sebastian Abel & Hamed Sanei & Stefano Bonaglia & Zhe Li & Gisela Horlitz & Arka Rudra & Kazumasa Oguri & Ronnie N. Glud, 2023. "Organic matter degradation causes enrichment of organic pollutants in hadal sediments," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    2. Mengfan Chu & Rui Bao & Michael Strasser & Ken Ikehara & Jez Everest & Lena Maeda & Katharina Hochmuth & Li Xu & Ann McNichol & Piero Bellanova & Troy Rasbury & Martin Kölling & Natascha Riedinger & J, 2023. "Earthquake-enhanced dissolved carbon cycles in ultra-deep ocean sediments," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    3. Ying-Li Zhou & Paraskevi Mara & Guo-Jie Cui & Virginia P. Edgcomb & Yong Wang, 2022. "Microbiomes in the Challenger Deep slope and bottom-axis sediments," Nature Communications, Nature, vol. 13(1), pages 1-13, December.

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