Literature DB >> 21700871

Abiotic pyrite formation produces a large Fe isotope fractionation.

Romain Guilbaud1, Ian B Butler, Rob M Ellam.   

Abstract

The iron isotope composition of sedimentary pyrite has been proposed as a potential proxy to trace microbial metabolism and the redox evolution of the oceans. We demonstrate that Fe isotope fractionation accompanies abiotic pyrite formation in the absence of Fe(II) redox change. Combined fractionation factors between Fe(II)(aq), mackinawite, and pyrite permit the generation of pyrite with Fe isotope signatures that nearly encapsulate the full range of sedimentary δ(56)Fe(pyrite) recorded in Archean to modern sediments. We propose that Archean negative Fe isotope excursions reflect partial Fe(II)(aq) utilization during abiotic pyrite formation rather than microbial dissimilatory Fe(III) reduction. Late Proterozoic to modern sediments may reflect greater Fe(II)(aq) utilization and variations in source composition.

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Year:  2011        PMID： 21700871     DOI： 10.1126/science.1202924

Source DB:  PubMed          Journal:  Science        ISSN： 0036-8075            Impact factor:   47.728


  7 in total

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3.  Rapid pyritization in the presence of a sulfur/sulfate-reducing bacterial consortium.

Authors:  Jasmine S Berg; Arnaud Duverger; Laure Cordier; Christel Laberty-Robert; François Guyot; Jennyfer Miot
Journal:  Sci Rep       Date:  2020-05-19       Impact factor: 4.379

4.  More than redox, biological organic ligands control iron isotope fractionation in the riparian wetland.

Authors:  Elaheh Lotfi-Kalahroodi; Anne-Catherine Pierson-Wickmann; Olivier Rouxel; Rémi Marsac; Martine Bouhnik-Le Coz; Khalil Hanna; Mélanie Davranche
Journal:  Sci Rep       Date:  2021-01-21       Impact factor: 4.379

5.  Metabolic diversity and ecological niches of Achromatium populations revealed with single-cell genomic sequencing.

Authors:  Muammar Mansor; Trinity L Hamilton; Matthew S Fantle; Jennifer L Macalady
Journal:  Front Microbiol       Date:  2015-08-10       Impact factor: 5.640

6.  In Situ Fe and S isotope analyses in pyrite from the 3.2 Ga Mendon Formation (Barberton Greenstone Belt, South Africa): Evidence for early microbial iron reduction.

Authors:  Johanna Marin-Carbonne; Vincent Busigny; Jennyfer Miot; Claire Rollion-Bard; Elodie Muller; Nadja Drabon; Damien Jacob; Sylvain Pont; Martin Robyr; Tomaso R R Bontognali; Camille François; Stephanie Reynaud; Mark Van Zuilen; Pascal Philippot
Journal:  Geobiology       Date:  2020-03-02       Impact factor: 4.407

7.  Strong evidence for a weakly oxygenated ocean-atmosphere system during the Proterozoic.

Authors:  Changle Wang; Maxwell A Lechte; Christopher T Reinhard; Dan Asael; Devon B Cole; Galen P Halverson; Susannah M Porter; Nir Galili; Itay Halevy; Robert H Rainbird; Timothy W Lyons; Noah J Planavsky
Journal:  Proc Natl Acad Sci U S A       Date:  2022-02-08       Impact factor: 12.779
  7 in total

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