{"refrec":{"BRefID":297744,"RR":"<b>Li, Z.-Q.; Zhang, L.-C.; Xue, C.-J.; Zheng, M.-T.; Zhu, M.-T.; Robbins, L.J.; Slack, J.F.; Planavsky, N.J.; Konhauser, K.O.</b> (2018). Earth’s youngest banded iron formation implies ferruginous conditions in the Early Cambrian ocean. <i>NPG Scientific Reports 8(1)</i>. <a href=\"https://dx.doi.org/10.1038/s41598-018-28187-2\" target=\"_blank\">https://dx.doi.org/10.1038/s41598-018-28187-2</a>","BEntID":289832,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>NPG Scientific Reports 8(1)</i>. <a href=\"https://dx.doi.org/10.1038/s41598-018-28187-2\" target=\"_blank\">https://dx.doi.org/10.1038/s41598-018-28187-2</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Li, Z.-Q.; Zhang, L.-C.; Xue, C.-J.; Zheng, M.-T.; Zhu, M.-T.; Robbins, L.J.; Slack, J.F.; Planavsky, N.J.; Konhauser, K.O.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Li, Z.-Q. <i>et al.</i>","Englishabstract":"It has been proposed that anoxic and iron-rich (ferruginous) marine conditions were common through most of Earth history. This view represents a major shift in our understanding of the evolution of marine chemistry. However, thus far, evidence for ferruginous conditions comes predominantly from Fe-speciation data. Given debate over these records, new evidence for Fe-rich marine conditions is a requisite if we are to shift our view regarding evolution of the marine redox landscape. Here we present strong evidence for ferruginous conditions by describing a suite of Fe-rich chemical sedimentary rocks—banded iron formation (BIF)—-deposited during the Early Cambrian in western China. Specifically, we provide new U-Pb geochronological data that confirm a depositional age of ca. 527 Ma for this unit, as well as rare earth element (REE) data are consistent with anoxic deposition. Similar to many Algoma-type Precambrian iron formations, these Early Cambrian sediments precipitated in a back-arc rift basin setting, where hydrothermally sourced iron drove the deposition of a BIF-like protolith, the youngest ever reported of regional extent without direct links to volcanogenic massive sulphide (VMS) deposits. Their presence indicates that marine environments were still characterized by chemical- and redox-stratification, thus supporting the view that—despite a dearth of modern marine analogues—ferruginous conditions continued to locally be a feature of early Phanerozoic seawater.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Earth’s youngest banded iron formation implies ferruginous conditions in the Early Cambrian ocean","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-05-30 01:31:41.231173","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2018,"MonPub":null,"DateUpdate":"2018-07-05","DateCreate":"2018-07-05","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000436955000025","VABBcode":null,"OpenAcc":1,"DOI":"10.1038/s41598-018-28187-2"},"refs":null,"anarec":{"AnaID":297744,"PubliDate":2018,"Pagination":null,"XtraPublOfAnaID":null,"ISBN":null,"Volume":"8","Issue":"1","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":208093,"SerRR":"Scientific Reports (Nature Publishing Group). 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