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dc.contributor.authorOssa Ossa, Frantz
dc.contributor.authorKönig, Stephan
dc.date.accessioned2022-12-15T13:03:30Z
dc.date.available2022-12-15T13:03:30Z
dc.date.issued2022-07-27
dc.identifier.citationFrantz Ossa Ossa... [et al.]. Moderate levels of oxygenation during the late stage of Earth's Great Oxidation Event, Earth and Planetary Science Letters, Volume 594, 2022, 117716, ISSN 0012-821X, [https://doi.org/10.1016/j.epsl.2022.117716]es_ES
dc.identifier.urihttps://hdl.handle.net/10481/78482
dc.description.abstractThe later stages of Earth’s transition to a permanently oxygenated atmosphere during the Great Oxidation Event (GOE; ∼2.43–2.06 Ga) is commonly linked with the suggestion of an “oxygen overshoot” during the ∼2.22–2.06 Ga Lomagundi Event (LE), which represents Earth’s most pronounced and longest-lived positive carbon isotope excursion. However, the magnitude and extent of atmosphere-ocean oxygenation and implications for the biosphere during this critical period in Earth’s history remain poorly constrained. Here, we present nitrogen (N), selenium (Se), and carbon (C) isotope data, as well as bio-essential element concentrations, for Paleoproterozoic marine shales deposited during the LE. The data provide evidence for a highly productive and well-oxygenated photic zone, with both inner and outer-shelf marine environments characterized by nitrate-and Se oxyanion-replete conditions. However, the redoxcline subsequently encroached back onto the inner shelf during global-scale deoxygenation of the atmosphere-ocean system at the end of the LE, leading to locally enhanced water column denitrification and quantitative reduction of selenium oxyanions. We propose that nitrate-replete conditions associated with fully oxygenated continental shelf settings were a common feature during the LE, but nitrification was not sufficiently widespread for the aerobic nitrogen cycle to impact the isotopic composition of the global ocean N inventory. Placed in the context of Earth’s broader oxygenation history, our findings indicate that O2levels in the atmosphere-ocean system were likely much lower than modern concentrations. Early Paleoproterozoic biogeochemical cycles were thus far less advanced than after Neoproterozoic oxygenation.es_ES
dc.description.sponsorshipUniversity of Tubingenes_ES
dc.description.sponsorshipGerman Research Foundation (DFG) SCHO1071/11-1 VA 1568/1-1es_ES
dc.description.sponsorshipUK Research & Innovation (UKRI)es_ES
dc.description.sponsorshipNatural Environment Research Council (NERC) NE/V004824/1es_ES
dc.description.sponsorshipUniversity of Lausannees_ES
dc.description.sponsorshipEuropean Research Council (ERC) 636808es_ES
dc.description.sponsorshipNational Research Foundation of South Africa (NRF Grant) 75892es_ES
dc.description.sponsorshipSpanish Government RYC2020-030014-Ies_ES
dc.description.sponsorshipNatural Sciences and Engineering Research Council of Canada (NSERC)es_ES
dc.description.sponsorshipACS PF grant 624840ND2es_ES
dc.description.sponsorshipNERC Frontiers grant NE/V010824/1es_ES
dc.description.sponsorshipRoyal Society of Londones_ES
dc.language.isoenges_ES
dc.publisherElsevieres_ES
dc.rightsAtribución 4.0 Internacional*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectPaleoproterozoices_ES
dc.subjectLomagundi carbon isotope excursiones_ES
dc.subjectGreat Oxidation Eventes_ES
dc.subjectFrancevillian Groupes_ES
dc.subjectBiogeochemical cycleses_ES
dc.titleModerate levels of oxygenation during the late stage of Earth’s Great Oxidation Eventes_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses_ES
dc.identifier.doi10.1016/j.epsl.2022.117716
dc.type.hasVersioninfo:eu-repo/semantics/publishedVersiones_ES


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