{"refrec":{"BRefID":351442,"RR":"<b>Papineau, D.; She, Z.; Dodd, M.S.; Iacoviello, F.; Slack, J.F.; Hauri, E.; Shearing, P.; Little, C.T.S.</b> (2022). Metabolically diverse primordial microbial communities in Earth’s oldest seafloor-hydrothermal jasper. <i>Science Advances 8(15)</i>: eabm2296. <a href=\"https://dx.doi.org/10.1126/sciadv.abm2296\" target=\"_blank\">https://dx.doi.org/10.1126/sciadv.abm2296</a>","BEntID":349148,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":0,"RefStringPartII":". <i>Science Advances 8(15)</i>: eabm2296. <a href=\"https://dx.doi.org/10.1126/sciadv.abm2296\" target=\"_blank\">https://dx.doi.org/10.1126/sciadv.abm2296</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Papineau, D.; She, Z.; Dodd, M.S.; Iacoviello, F.; Slack, J.F.; Hauri, E.; Shearing, P.; Little, C.T.S.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Papineau, D. <i>et al.</i>","Englishabstract":"The oldest putative fossils occur as hematite filaments and tubes in jasper-carbonate banded iron formations from the 4280- to 3750-Ma Nuvvuagittuq Supracrustal Belt, Québec. If biological in origin, these filaments might have affinities with modern descendants; however, if abiotic, they could indicate complex prebiotic forms on early Earth. Here, we report images of centimeter-size, autochthonous hematite filaments that are pectinate-branching, parallel-aligned, undulated, and containing Fe<sup>2+</sup>-oxides. These microstructures are considered microfossils because of their mineral associations and resemblance to younger microfossils, modern Fe-bacteria from hydrothermal environments, and the experimental products of heated Fe-oxidizing bacteria. Additional clusters of irregular hematite ellipsoids could reflect abiotic processes of silicification, producing similar structures and thus yielding an uncertain origin. Millimeter-sized chalcopyrite grains within the jasper-carbonate rocks have <sup>34</sup>S- and <sup>33</sup>S-enrichments consistent with microbial S-disproportionation and an O<sub>2</sub>-poor atmosphere. Collectively, the observations suggest a diverse microbial ecosystem on the primordial Earth that may be common on other planetary bodies, including Mars.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Metabolically diverse primordial microbial communities in Earth’s oldest seafloor-hydrothermal jasper","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":"2022-04-14","DateCreate":"2022-04-14","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000786201300021","VABBcode":null,"OpenAcc":1,"DOI":"10.1126/sciadv.abm2296"},"refs":null,"anarec":{"AnaID":351442,"PubliDate":2022,"Pagination":"eabm2296","XtraPublOfAnaID":null,"ISBN":null,"Volume":"8","Issue":"15","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":248966,"SerRR":"Science Advances. 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