{"refrec":{"BRefID":330585,"RR":"<b>Heard, A.W.; Dauphas, N.; Guilbaud, R.; Rouxel, O.J.; Butler, I.B.; Nie, N.X.; Bekker, A.</b> (2020). Triple iron isotope constraints on the role of ocean iron sinks in early atmospheric oxygenation. <i>Science (Wash.) 370(6515)</i>: 446-449. <a href=\"https://dx.doi.org/10.1126/science.aaz8821\" target=\"_blank\">https://dx.doi.org/10.1126/science.aaz8821</a>","BEntID":324195,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Science (Wash.) 370(6515)</i>: 446-449. <a href=\"https://dx.doi.org/10.1126/science.aaz8821\" target=\"_blank\">https://dx.doi.org/10.1126/science.aaz8821</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Heard, A.W.; Dauphas, N.; Guilbaud, R.; Rouxel, O.J.; Butler, I.B.; Nie, N.X.; Bekker, A.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Heard, A.W. <i>et al.</i>","Englishabstract":"The role that iron played in the oxygenation of Earth’s surface is equivocal. Iron could have consumed molecular oxygen when Fe<sup>3+</sup>-oxyhydroxides formed in the oceans, or it could have promoted atmospheric oxidation by means of pyrite burial. Through high-precision iron isotopic measurements of Archean-Paleoproterozoic sediments and laboratory grown pyrites, we show that the triple iron isotopic composition of Neoarchean-Paleoproterozoic pyrites requires both extensive marine iron oxidation and sulfide-limited pyritization. Using an isotopic fractionation model informed by these data, we constrain the relative sizes of sedimentary Fe<sup>3+</sup>-oxyhydroxide and pyrite sinks for Neoarchean marine iron. We show that pyrite burial could have resulted in molecular oxygen export exceeding local Fe<sup>2+</sup> oxidation sinks, thereby contributing to early episodes of transient oxygenation of Archean surface environments.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Triple iron isotope constraints on the role of ocean iron sinks in early atmospheric oxygenation","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-05-12 01:34:00.825272","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2020,"MonPub":null,"DateUpdate":"2020-10-29","DateCreate":"2020-10-29","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000581077200042","VABBcode":null,"OpenAcc":0,"DOI":"10.1126/science.aaz8821"},"refs":null,"anarec":{"AnaID":330585,"PubliDate":2020,"Pagination":"446-449","XtraPublOfAnaID":null,"ISBN":null,"Volume":"370","Issue":"6515","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43776,"SerRR":"Science (Washington). 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