{"refrec":{"BRefID":382982,"RR":"<b>Tatzel, M.; Frings, P.J.; Oelze, M.; Herwartz, D.; Luensdorf, N.K.; Wiedenbeck, M.</b> (2022). Chert oxygen isotope ratios are driven by Earth's thermal evolution. <i>Proc. Natl. Acad. Sci. U.S.A. 119(51)</i>: e2213076119. <a href=\"https://dx.doi.org/10.1073/pnas.2213076119\" target=\"_blank\">https://dx.doi.org/10.1073/pnas.2213076119</a>","BEntID":380724,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Proc. Natl. Acad. Sci. U.S.A. 119(51)</i>: e2213076119. <a href=\"https://dx.doi.org/10.1073/pnas.2213076119\" target=\"_blank\">https://dx.doi.org/10.1073/pnas.2213076119</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Tatzel, M.; Frings, P.J.; Oelze, M.; Herwartz, D.; Luensdorf, N.K.; Wiedenbeck, M.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Tatzel, M. <i>et al.</i>","Englishabstract":"<span style=\"background-color:rgb(246,246,246);color:rgb(38,38,38);\">The </span><sup>18</sup><span style=\"background-color:rgb(246,246,246);color:rgb(38,38,38);\">O/</span><sup>16</sup><span style=\"background-color:rgb(246,246,246);color:rgb(38,38,38);\">O ratio of cherts (δ</span><sup>18</sup><span style=\"background-color:rgb(246,246,246);color:rgb(38,38,38);\">O</span><sub>chert</sub><span style=\"background-color:rgb(246,246,246);color:rgb(38,38,38);\">) increases nearly monotonically by ~15‰ from the Archean to present. Two end-member explanations have emerged: cooling seawater temperature (T</span><sub>SW</sub><span style=\"background-color:rgb(246,246,246);color:rgb(38,38,38);\">) and increasing seawater δ</span><sup>18</sup><span style=\"background-color:rgb(246,246,246);color:rgb(38,38,38);\">O (δ</span><sup>18</sup><span style=\"background-color:rgb(246,246,246);color:rgb(38,38,38);\">O</span><sub>sw</sub><span style=\"background-color:rgb(246,246,246);color:rgb(38,38,38);\">). Yet despite decades of work, there is no consensus, leading some to view the δ</span><sup>18</sup><span style=\"background-color:rgb(246,246,246);color:rgb(38,38,38);\">O</span><sub>chert</sub><span style=\"background-color:rgb(246,246,246);color:rgb(38,38,38);\"> record as pervasively altered. Here, we demonstrate that cherts are a robust archive of diagenetic temperatures, despite metamorphism and exposure to meteoric fluids, and show that the timing and temperature of quartz precipitation and thus δ</span><sup>18</sup><span style=\"background-color:rgb(246,246,246);color:rgb(38,38,38);\">O</span><sub>chert</sub><span style=\"background-color:rgb(246,246,246);color:rgb(38,38,38);\"> are determined by the kinetics of silica diagenesis. A diagenetic model shows that δ</span><sup>18</sup><span style=\"background-color:rgb(246,246,246);color:rgb(38,38,38);\">O</span><sub>chert</sub><span style=\"background-color:rgb(246,246,246);color:rgb(38,38,38);\"> is influenced by heat flow through the sediment column. Heat flow has decreased over time as planetary heat is dissipated, and reasonable Archean-modern heat flow changes account for ~5‰ of the increase in δ</span><sup>18</sup><span style=\"background-color:rgb(246,246,246);color:rgb(38,38,38);\">O</span><sub>chert</sub><span style=\"background-color:rgb(246,246,246);color:rgb(38,38,38);\">, obviating the need for extreme T</span><sub>SW</sub><span style=\"background-color:rgb(246,246,246);color:rgb(38,38,38);\"> or δ</span><sup>18</sup><span style=\"background-color:rgb(246,246,246);color:rgb(38,38,38);\">O</span><sub>sw</sub><span style=\"background-color:rgb(246,246,246);color:rgb(38,38,38);\"> reconstructions. The seawater oxygen isotope budget is also influenced by solid Earth cooling, with a recent reconstruction placing Archean δ</span><sup>18</sup><span style=\"background-color:rgb(246,246,246);color:rgb(38,38,38);\">O</span><sub>SW</sub><span style=\"background-color:rgb(246,246,246);color:rgb(38,38,38);\"> 5 to 10‰ lower than today. Together, this provides an internally consistent view of the δ</span><sup>18</sup><span style=\"background-color:rgb(246,246,246);color:rgb(38,38,38);\">O</span><sub>chert</sub><span style=\"background-color:rgb(246,246,246);color:rgb(38,38,38);\"> record as driven by solid Earth cooling over billion-year timescales that is compatible with Precambrian glaciations and biological constraints and satisfyingly accounts for the monotonic nature of the δ</span><sup>18</sup><span style=\"background-color:rgb(246,246,246);color:rgb(38,38,38);\">O</span><sub>chert</sub><span style=\"background-color:rgb(246,246,246);color:rgb(38,38,38);\"> trend.</span>","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Chert oxygen isotope ratios are driven by Earth's thermal evolution","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-06-09 01:32:41.334954","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"oxygen isotopes; silica diagenesis; early Earth; heat flow; climate","OtherDescriptors":null,"Notes":null,"AnaPub":2022,"MonPub":null,"DateUpdate":"2024-02-19","DateCreate":"2024-02-16","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000998900700008","VABBcode":null,"OpenAcc":0,"DOI":"10.1073/pnas.2213076119"},"refs":null,"anarec":{"AnaID":382982,"PubliDate":2022,"Pagination":"e2213076119","XtraPublOfAnaID":null,"ISBN":null,"Volume":"119","Issue":"51","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43690,"SerRR":"Proceedings of the National Academy of Sciences of the United States of America. The Academy: Washington, D.C..  ISSN 0027-8424; e-ISSN 1091-6490","StandardTitleSer":"Proceedings of the National Academy of Sciences of the United States of America","ISSN":"0027-8424","AbbrevSer":"Proc. Natl. Acad. Sci. U.S.A.","StandardTitleMon":null,"StartPage":7,"Pages":null,"ToPubliDate":null,"BRefBibLvlCode":"S","SerNotes":null},"monrec":null,"serrec":null,"relations":null,"relationsRev":null,"addrec":null,"othpubs":null,"ownerships":null,"authors":[{"AutName":"Tatzel","Firstname":null,"Initials":"M.","Affiliation":"Georg August Univ Gottingen, Geosci Ctr, Dept Sedimentol & Environm Geol, D-37077 Gottingen, Germany.","Discriminator":null,"CorporateFlag":0,"BEntID":380724,"AutID":556450,"OrderNr":1,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null},{"AutName":"Frings","Firstname":null,"Initials":"P.J.","Affiliation":"GFZ German Res Ctr Geosci, Earth Surface Geochem, D-14473 Potsdam, Germany.","Discriminator":null,"CorporateFlag":0,"BEntID":380724,"AutID":556452,"OrderNr":2,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":"0000-0002-1012-0642","PersID":44863,"InsID":null},{"AutName":"Oelze","Firstname":null,"Initials":"M.","Affiliation":"GFZ German Res Ctr Geosci, Earth Surface Geochem, D-14473 Potsdam, Germany.","Discriminator":null,"CorporateFlag":0,"BEntID":380724,"AutID":556454,"OrderNr":3,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null},{"AutName":"Herwartz","Firstname":null,"Initials":"D.","Affiliation":"Univ Cologne, Inst Geol & Mineral, D-50674 Cologne, Germany.","Discriminator":null,"CorporateFlag":0,"BEntID":380724,"AutID":556456,"OrderNr":4,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null},{"AutName":"Luensdorf","Firstname":null,"Initials":"N.K.","Affiliation":"Georg August Univ Gottingen, Geosci Ctr, Dept Sedimentol & Environm Geol, D-37077 Gottingen, Germany.","Discriminator":null,"CorporateFlag":0,"BEntID":380724,"AutID":556457,"OrderNr":5,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null},{"AutName":"Wiedenbeck","Firstname":null,"Initials":"M.","Affiliation":"GFZ German Res Ctr Geosci, Inorgan & Isotope Geochem, D-14473 Potsdam, Germany.","Discriminator":null,"CorporateFlag":0,"BEntID":380724,"AutID":556458,"OrderNr":6,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null}],"mapdetails":null,"datasets":null,"monographs":null,"monparts":null,"serparts":null,"BEntOpen":null,"BEntPrivate":null,"availability":[{"BInstID":396309,"LibID":36,"BRefID":382982,"EmbargoDate":null,"FullEmbargoDate":null,"PhysMedID":16,"hasOCRd":null,"ShelfLocCode":"396309","RFID":null,"PaidValue":null,"Medium":"Server","Description":"Interne VLIZ documenten","Acronym":"VLIZ","Library":"Vlaams Instituut voor de Zee","DutchTerm":"Non-open access","URL":null,"ClassifID":228,"Classification":"Non-open access","ReqLink":1,"ClassifTypID":3,"URLLocation":"https://www.vliz.be/imisdocs/publications/","SubDir":1,"InternalReq":1,"LoggedInReq":1,"Disclaimer":"Disclaimer_VLIZ_Intern","DutchDisclaimer":"<p>Deze publicatie is enkel beschikbaar voor persoonlijk gebruik binnen de Innovocean site <br />en mag op geen enkele manier verder worden verspreid.</p>","FileFormat":".pdf","FileDescr":"pdf","InsPub":1,"InsID":36,"FileFormID":6,"LendableFlag":1,"PublicFlag":1,"orderLib":"A","Notes":null,"AccConID":null,"AccessConstraint":null,"LicURL":null}],"litstyles":null,"thespers":null,"arch2discl":null,"SERpubls":[{"PublName":"The Academy","City":"Washington, D.C."}],"MONpubls":null,"pictures":[],"thestermsPath":null,"thestermsASFA":null,"taxtermsASFA":null,"geotermsASFA":null,"collections":null,"conf":null,"proj":null,"Physdatasets":null,"spcols":{"222":{"SpName":"BMB - Belgische Mariene Bibliografie","SpColID":222,"ParSpColID":null,"TopParID":null,"ShortName":"BMB","URLLocation":null,"LibID":36,"OpenRepoFlag":null,"SpTypID":null,"TopParIDNotWebsite":null,"SpColPath":"BMB"}},"doi":null,"publs":null,"serparttypes":null,"monauthors":null,"MParts":null,"SParts":null,"hLibs":null,"langs":[{"BEntID":380724,"AbstractFlag":0,"LangID":15,"LangCode":"en","Lang":"English","DutchTerm":"Engels","LangCodeExtended":"eng"},{"BEntID":380724,"AbstractFlag":1,"LangID":15,"LangCode":"en","Lang":"English","DutchTerm":"Engels","LangCodeExtended":"eng"}],"urls":[{"URL":"https://dx.doi.org/10.1073/pnas.2213076119","externalID":"10.1073/pnas.2213076119","URLTypeCode":"DOI","URLID":128377,"URLTypID":13,"URLType":"DOI","URLPrefix":"http://dx.doi.org/"}],"thesterms":null,"taxterms":null,"geoterms":null,"othterms":null,"asfacodes":null,"asfa2codes":null,"thestermsFRIS":null,"taxtermsFRIS":null,"geotermsFRIS":null,"othtermsFRIS":null,"resmessage":"","complete":1,"sessions":{"newSesName":"Lyssens, Liesbeth, L.","newSesDate":{"date":"2024-02-16 13:22:13.557000","timezone_type":3,"timezone":"Europe/Brussels"},"updSesName":"Bouchti, Zohra, Z.","updSesDate":{"date":"2024-02-19 06:58:21.840000","timezone_type":3,"timezone":"Europe/Brussels"}}}