Geological evidence of extensive N-fixation by volcanic lightning during very large explosive eruptions

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dc.contributor.authorAroskay, Adeline
dc.contributor.authorMartin, Erwan
dc.contributor.authorBekki, Slimane
dc.contributor.authorLe Pennec, Jean-Luc
dc.contributor.authorSavarino, Joël
dc.contributor.authorTemel, Abidin
dc.contributor.authorManrique, Nelida
dc.contributor.authorAguilar, Rigoberto
dc.contributor.authorRivera, Marco
dc.contributor.authorGuillou, Hervé
dc.contributor.authorBalcone-Boissard, Hélène
dc.contributor.authorPhelip, Océane
dc.contributor.authorSzopa, Sophie
dc.date.accessioned2024-02-19T20:39:57Z
dc.date.available2024-02-19T20:39:57Z
dc.date.issued2024-02-05
dc.description.abstractMost of the nitrogen (N) accessible for life is trapped in dinitrogen (N₂), the most stable atmospheric molecule. In order to be metabolized by living organisms, N₂ has to be converted into biologically assimilable forms, so-called fixed N. Nowadays, nearly all the N-fixation is achieved through biological and anthropogenic processes. However, in early prebiotic environments of the Earth, N-fixation must have occurred via natural abiotic processes. One of the most invoked processes is electrical discharges, including from thunderstorms and lightning associated with volcanic eruptions. Despite the frequent occurrence of volcanic lightning during explosive eruptions and convincing laboratory experimentation, no evidence of substantial N-fixation has been found in any geological archive. Here, we report on the discovery of a significant amount of nitrate in volcanic deposits from Neogene caldera-forming eruptions, which are well correlated with the concentrations of species directly emitted by volcanoes (sulfur, chlorine). The multi-isotopic composition (δ¹⁸O, Δ¹⁷O) of the nitrates reveals that they originate from the atmospheric oxidation of nitrogen oxides formed by volcanic lightning. According to these first geological volcanic nitrate archive, we estimate that, on average, about 60 Tg of N can be fixed during a large explosive event. Our findings hint at a unique role potentially played by subaerial explosive eruptions in supplying essential ingredients for the emergence of life on Earth.es_ES
dc.description.peer-reviewPor pareses_ES
dc.formatapplication/pdfes_ES
dc.identifier.citationAroskay, A., Martin, E., Bekki, S., Le Pennec, J. L., Savarino, J., Temel, A., ... & Szopa, S. (2024). Geological evidence of extensive N-fixation by volcanic lightning during very large explosive eruptions.==$Proceedings of the National Academy of Sciences, 121$==(7), e2309131121. https://doi.org/10.1073/pnas.2309131121es_ES
dc.identifier.doihttps://doi.org/10.1073/pnas.2309131121es_ES
dc.identifier.govdocindex-oti2018
dc.identifier.journalProceedings of the National Academy of Sciences (PNAS)es_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/5529
dc.language.isoenges_ES
dc.publisherNational Academy of Scienceses_ES
dc.relation.ispartofurn:issn:1091-6490
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/es_ES
dc.subjectN-fixationes_ES
dc.subjectVolcanic lightninges_ES
dc.subjectNitratees_ES
dc.subjectO-isotopeses_ES
dc.subject.ocdehttps://purl.org/pe-repo/ocde/ford#1.05.07es_ES
dc.titleGeological evidence of extensive N-fixation by volcanic lightning during very large explosive eruptionses_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

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