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Abiotic pyrite formation produces a large Fe isotope fractionation

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Abiotic pyrite formation produces a large Fe isotope fractionation. / Guilbaud, Romain; Butler, Ian B.; Ellam, Rob M.
In: Science, Vol. 332, No. 6037, 24.06.2011, p. 1548-1551.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

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Guilbaud, R, Butler, IB & Ellam, RM 2011, 'Abiotic pyrite formation produces a large Fe isotope fractionation', Science, vol. 332, no. 6037, pp. 1548-1551. https://doi.org/10.1126/science.1202924

APA

Vancouver

Guilbaud R, Butler IB, Ellam RM. Abiotic pyrite formation produces a large Fe isotope fractionation. Science. 2011 Jun 24;332(6037):1548-1551. doi: 10.1126/science.1202924

Author

Guilbaud, Romain ; Butler, Ian B. ; Ellam, Rob M. / Abiotic pyrite formation produces a large Fe isotope fractionation. In: Science. 2011 ; Vol. 332, No. 6037. pp. 1548-1551.

Bibtex

@article{a55f08ea977b4d48a1393c6682649ded,
title = "Abiotic pyrite formation produces a large Fe isotope fractionation",
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 56Fe 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.",
author = "Romain Guilbaud and Butler, {Ian B.} and Ellam, {Rob M.}",
year = "2011",
month = jun,
day = "24",
doi = "10.1126/science.1202924",
language = "English",
volume = "332",
pages = "1548--1551",
journal = "Science",
issn = "0036-8075",
publisher = "American Association for the Advancement of Science",
number = "6037",

}

RIS

TY - JOUR

T1 - Abiotic pyrite formation produces a large Fe isotope fractionation

AU - Guilbaud, Romain

AU - Butler, Ian B.

AU - Ellam, Rob M.

PY - 2011/6/24

Y1 - 2011/6/24

N2 - 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 56Fe 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.

AB - 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 56Fe 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.

U2 - 10.1126/science.1202924

DO - 10.1126/science.1202924

M3 - Journal article

C2 - 21700871

AN - SCOPUS:79959513214

VL - 332

SP - 1548

EP - 1551

JO - Science

JF - Science

SN - 0036-8075

IS - 6037

ER -