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dc.contributor.authorLepot, Kevin
dc.contributor.authorAddad, Ahmed
dc.contributor.authorKnoll, Andrew
dc.contributor.authorWang, Jian
dc.contributor.authorTroadec, David
dc.contributor.authorBéché, Armand
dc.contributor.authorJavaux, Emmanuelle
dc.date.accessioned2019-08-29T21:19:54Z
dc.date.issued2017-03-23
dc.identifier.citationLepot, Kevin, Ahmed Addad, Andrew H. Knoll, Jian Wang, David Troadec, Armand Béché, and Emmanuelle J. Javaux. 2017. Iron Minerals Within Specific Microfossil Morphospecies of the 1.88 Ga Gunflint Formation. Nature Communications 8: 14890.en_US
dc.identifier.issn2041-1723en_US
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:41288102*
dc.description.abstractProblematic microfossils dominate the palaeontological record between the Great Oxidation Event 2.4 billion years ago (Ga) and the last Palaeoproterozoic iron formations, deposited 500–600 million years later. These fossils are often associated with iron-rich sedimentary rocks, but their affinities, metabolism, and, hence, their contributions to Earth surface oxidation and Fe deposition remain unknown. Here we show that specific microfossil populations of the 1.88 Ga Gunflint Iron Formation contain Fe-silicate and Fe-carbonate nanocrystal concentrations in cell interiors. Fe minerals are absent in/on all organically preserved cell walls. These features are consistent with in vivo intracellular Fe biomineralization, with subsequent in situ recrystallization, but contrast with known patterns of post-mortem Fe mineralization. The Gunflint populations that display relatively large cells (thick-walled spheres, filament-forming rods) and intra-microfossil Fe minerals are consistent with oxygenic photosynthesizers but not with other Fe-mineralizing microorganisms studied so far. Fe biomineralization may have protected oxygenic photosynthesizers against Fe2+ toxicity during the Palaeoproterozoic.en_US
dc.description.sponsorshipEarth and Planetary Sciencesen_US
dc.language.isoen_USen_US
dc.publisherSpringer Science and Business Media LLCen_US
dash.licenseLAA
dc.subjectGeneral Biochemistry, Genetics and Molecular Biologyen_US
dc.subjectGeneral Physics and Astronomyen_US
dc.subjectGeneral Chemistryen_US
dc.titleIron Minerals Within Specific Microfossil Morphospecies of the 1.88 Ga Gunflint Formationen_US
dc.typeJournal Articleen_US
dc.description.versionVersion of Recorden_US
dc.relation.journalNature Communicationsen_US
dash.depositing.authorKnoll, Andrew
dc.date.available2019-08-29T21:19:54Z
dash.workflow.commentsFAR2017en_US
dash.funder.nameNASA Astrobiology Instituteen_US
dash.funder.nameConseil Régional du Nord-Pas de Calaisen_US
dash.funder.nameEuropean Regional Development Funden_US
dash.funder.nameCNRS-INSUen_US
dash.funder.nameFP7-ESMIen_US
dash.funder.nameFNRSen_US
dash.funder.nameERC StG ELiTEen_US
dash.funder.nameBELSPO IAP PLANET TOPERSen_US
dash.funder.award2.4558.09Fen_US
dash.funder.award308074en_US
dash.funder.award262348en_US
dash.funder.awardANR-15-CE31-0003-01en_US
dc.identifier.doi10.1038/ncomms14890
dc.source.journalNat Commun
dash.source.volume8;1
dash.source.page45-48
dash.contributor.affiliatedWang, Jian
dash.contributor.affiliatedJavaux, Emmanuelle
dash.contributor.affiliatedKnoll, Andrew


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