@article {chu_earthquake-enhanced_2023,
	title = {Earthquake-enhanced dissolved carbon cycles in ultra-deep ocean sediments},
	journal = {Nature Communications},
	volume = {14},
	year = {2023},
	month = {09/2023},
	pages = {5427},
	abstract = {Hadal trenches are unique geological and ecological systems located along subduction zones. Earthquake-triggered turbidites act as efficient transport pathways of organic carbon (OC), yet remineralization and transformation of OC in these systems are not comprehensively understood. Here we measure concentrations and stable- and radiocarbon isotope signatures of dissolved organic and inorganic carbon (DOC, DIC) in the subsurface sediment interstitial water along the Japan Trench axis collected during the IODP Expedition 386. We find accumulation and aging of DOC and DIC in the subsurface sediments, which we interpret as enhanced production of labile dissolved carbon owing to earthquake-triggered turbidites, which supports intensive microbial methanogenesis in the trench sediments. The residual dissolved carbon accumulates in deep subsurface sediments and may continue to fuel the deep biosphere. Tectonic events can therefore enhance carbon accumulation and stimulate carbon transformation in plate convergent trench systems, which may accelerate carbon export into the subduction zones., Earthquakes enhance dissolved carbon production and fuel the microbial activities in hadal trench subsurface sediments, and ultimately strengthen carbon accumulation and transformation in the subduction zones.},
	issn = {2041-1723},
	doi = {10.1038/s41467-023-41116-w},
	url = {https://www.nature.com/articles/s41467-023-41116-w},
	author = {Chu, Mengfan and Bao, Rui and Strasser, Michael and Ikehara, Ken and Everest, Jez and Maeda, Lena and Hochmuth, Katharina and Xu, Li and McNichol, Ann and Bellanova, Piero and Rasbury, Troy and K{\"o}lling, Martin and Riedinger, Natascha and Johnson, Joel and Luo, Min and M{\"a}rz, Christian and Straub, Susanne and Jitsuno, Kana and Brunet, Morgane and Cai, Zhirong and Cattaneo, Antonio and Hsiung, Kanhsi and Ishizawa, Takashi and Itaki, Takuya and Kanamatsu, Toshiya and Keep, Myra and Kioka, Arata and McHugh, Cecilia and Micallef, Aaron and Pandey, Dhananjai and Proust, Jean No{\"e}l and Satoguchi, Yasufumi and Sawyer, Derek and Seibert, Chlo{\'e} and Silver, Maxwell and Virtasalo, Joonas and Wang, Yonghong and Wu, Ting-Wei and Zellers, Sarah}
}
@article {2604,
	title = {Tectonically-triggered sediment and carbon export to the Hadal zone},
	journal = {Nature Communications},
	volume = {9},
	year = {2018},
	month = {Jan-12-2018},
	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.},
	issn = {2041-1723},
	doi = {10.1038/s41467-017-02504-1},
	url = {http://www.nature.com/articles/s41467-017-02504-1http://www.nature.com/articles/s41467-017-02504-1.pdfhttp://www.nature.com/articles/s41467-017-02504-1.pdfhttp://www.nature.com/articles/s41467-017-02504-1},
	author = {Bao, Rui and Strasser, Michael and McNichol, Ann P. and Haghipour, Negar and McIntyre, Cameron and Wefer, Gerold and Eglinton, Timothy I.}
}
