{"refrec":{"BRefID":350303,"RR":"<b>Neill, C.; Aulbach, S.</b> (2022). Destabilization of deep oxidized mantle drove the Great Oxidation Event. <i>Science Advances 8(7)</i>: eabg1626","BEntID":347999,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":0,"RefStringPartII":". <i>Science Advances 8(7)</i>: eabg1626","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Neill, C.; Aulbach, S.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Neill, C.; Aulbach, S.","Englishabstract":"The rise of Earth’s atmospheric O<sub>2</sub> levels at ~2.4 Ga was driven by a shift between increasing sources and declining sinks of oxygen. Here, we compile recent evidence that the mantle shows a significant increase in oxidation state leading to the Great Oxidation Event (GOE), linked to sluggish upward mixing of a deep primordial oxidized layer. We simulate this scenario by implementing a new rheological model for this oxidized, bridgmanite-enriched viscous material and demonstrate slow mantle mixing in simulations of early Earth’s mantle. The eventual homogenization of this layer may take ~2 Ga, in line with the timing of the observed mantle redox shift, and would result in the increase in upper mantle oxidation of &gt;1 log(<i>f</i>O<sub>2</sub>) unit. Such a shift would alter the redox state of volcanic degassing products to more oxidized species, removing a major sink of atmospheric O<sub>2</sub> and allowing oxygen levels to rise at ~2.4 Ga.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Destabilization of deep oxidized mantle drove the Great Oxidation Event","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2022,"MonPub":null,"DateUpdate":"2022-03-10","DateCreate":"2022-03-10","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000760189000002","VABBcode":null,"OpenAcc":1},"refs":null,"anarec":{"AnaID":350303,"PubliDate":2022,"Pagination":"eabg1626","XtraPublOfAnaID":null,"ISBN":null,"Volume":"8","Issue":"7","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":248966,"SerRR":"Science Advances. 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