Earthquake-enhanced dissolved carbon cycles in ultra-deep ocean sediments.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
11 Sep 2023
11 Sep 2023
Historique:
received:
08
04
2023
accepted:
23
08
2023
medline:
12
9
2023
pubmed:
12
9
2023
entrez:
11
9
2023
Statut:
epublish
Résumé
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.
Identifiants
pubmed: 37696798
doi: 10.1038/s41467-023-41116-w
pii: 10.1038/s41467-023-41116-w
pmc: PMC10495447
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
5427Subventions
Organisme : National Natural Science Foundation of China (National Science Foundation of China)
ID : 42076037
Organisme : National Natural Science Foundation of China (National Science Foundation of China)
ID : 42242601
Informations de copyright
© 2023. Springer Nature Limited.
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