A transient peak in marine sulfate after the 635-Ma snowball Earth

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dc.contributor.authorPeng, Yongboen
dc.contributor.authorBao, Huimingen
dc.contributor.authorJiang, Ganqingen
dc.contributor.authorCrockford, Peteren
dc.contributor.authorFeng, Dongen
dc.contributor.authorXiao, Shuhaien
dc.contributor.authorKaufman, Alan Jayen
dc.contributor.authorWang, Jiashengen
dc.date.accessioned2024-02-13T15:05:57Zen
dc.date.available2024-02-13T15:05:57Zen
dc.date.issued2022-05-10en
dc.description.abstractA series of dramatic oceanic and atmospheric events occurred in the immediate aftermath of the Marinoan “snowball Earth” meltdown ∼635 My ago. However, at the 10-to 100-ky timescale, the order, rate, duration, and causal-feedback relationships of these individual events remain nebulous. Nonetheless, rapid swings in regional marine sulfate concentrations are predicted to have occurred in the aftermath of a snowball Earth, due to the nonlinear responses of its two major controlling fluxes: oxidative weathering on the continents and pyrite burial in marine sediments. Here, through the application of multiple isotope systems on various carbon and sulfur compounds, we determined extremely 13C-depleted calcite cements in the basal Ediacaran in South China to be the result of microbial sulfate reduction coupled to anaerobic oxidation of methane, which indicates an interval of high sulfate concentrations in some part of the postmeltdown ocean. Regional chemostratigraphy places the 13C-depleted cements at the equivalent of the earliest Ediacaran 17O-depletion episode, thus confining the timing of this peak in sulfate concentrations within ∼50 ky since the onset of the deglaciation. The dearth of similarly 13C-depleted cements in other Proterozoic successions implies that the earliest Ediacaran peak in marine sulfate concentration is a regional and likely transient event.en
dc.description.versionPublished versionen
dc.format.extent7 page(s)en
dc.format.mimetypeapplication/pdfen
dc.identifierARTN e2117341119 (Article number)en
dc.identifier.doihttps://doi.org/10.1073/pnas.2117341119en
dc.identifier.eissn1091-6490en
dc.identifier.issn0027-8424en
dc.identifier.issue19en
dc.identifier.orcidXiao, Shuhai [0000-0003-4655-2663]en
dc.identifier.pmid35500113en
dc.identifier.urihttps://hdl.handle.net/10919/117974en
dc.identifier.volume119en
dc.language.isoenen
dc.publisherNational Academy of Sciencesen
dc.relation.urihttps://www.ncbi.nlm.nih.gov/pubmed/35500113en
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectsnowball Earthen
dc.subjectoxidationen
dc.subjectsulfateen
dc.subjectO-17 anomalyen
dc.subjectmethane oxidationen
dc.titleA transient peak in marine sulfate after the 635-Ma snowball Earthen
dc.title.serialProceedings of The National Academy of Sciences of The United States of Americaen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.otherArticleen
dc.type.otherJournalen
pubs.organisational-group/Virginia Techen
pubs.organisational-group/Virginia Tech/Scienceen
pubs.organisational-group/Virginia Tech/Science/Geosciencesen
pubs.organisational-group/Virginia Tech/All T&R Facultyen
pubs.organisational-group/Virginia Tech/Science/COS T&R Facultyen

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