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Coupling sulfur and oxygen isotope ratios in sediment melts across the Archean-Proterozoic transition

Liebmann, Janne and Spencer, Christopher J. and Kirkland, Christopher L. and Bucholz, Claire E. and Xia, Xiao-Ping and Martin, Laure and Kitchen, Nami and Shumlyanskyy, Leonid (2021) Coupling sulfur and oxygen isotope ratios in sediment melts across the Archean-Proterozoic transition. Geochimica et Cosmochimica Acta, 307 . pp. 242-257. ISSN 0016-7037. doi:10.1016/j.gca.2021.05.045.

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The Archean-Proterozoic transition marks a time of fundamental geologic, biologic, and atmospheric changes to the Earth system, including oxygenation of the atmosphere (termed the Great Oxygenation Event; GOE), and the emergence of continents above sea level. The impacts of the GOE on Earth’s surface environment are imprinted on the geologic record, including the disappearance of mass-independent fractionation of sulfur isotopes (S-MIF). Temporally overlapping geologic and geochemical observations (e.g. a change in oxygen isotope ratio of sediments and an increase in subaerial volcanism) imply the widespread subaerial emergence of continents was coeval with atmospheric oxygenation. Here we present triple sulfur isotope ratios in pyrite and oxygen isotope ratios in garnet and zircon in a global suite of Archean and Proterozoic granitoids derived from the partial melting of sedimentary protoliths. These crustal melts record an increase in average garnet and zircon δ¹⁸O from 7.2‰ before 2.3 Ga to 10.0‰ post-2.3 Ga. Pre-2.3 Ga granitoids show small S-MIF signatures with Δ³³S ranging from −0.29‰ to 0.13‰, whereas post-2.3 Ga granitoids record S-MDF (i.e. Δ³³S = 0‰). The combination of sulfur and oxygen isotope signatures in the same sample with zircon U-Pb geochronology provides new insights on a potential causal link between the emergence of continents and Paleoproterozoic atmospheric oxygenation.

Item Type:Article
Related URLs:
URLURL TypeDescription
Liebmann, Janne0000-0002-0739-3148
Spencer, Christopher J.0000-0003-4264-3701
Kirkland, Christopher L.0000-0003-3367-8961
Bucholz, Claire E.0000-0001-5332-8278
Xia, Xiao-Ping0000-0002-3203-039X
Shumlyanskyy, Leonid0000-0002-6775-4419
Additional Information:© 2021 Elsevier Ltd. Received 15 December 2020, Accepted 21 May 2021, Available online 28 May 2021. We thank Crystal LaFlamme and two anonymous reviewers for their constructive comments, and Shuhei Ono for editorial handling. U-Pb geochronology analytical work at the John de Laeter Centre, Western Australia was enabled by NCRIS via AuScope. Oxygen and sulfur isotope analytical work at the Guangzhou Institute of Geochemistry was supported by the open fund from the State Key Laboratory of Isotope Geochemistry, GIGCAS (SKLabIG-KF-18-04). The authors acknowledge the facilities, and the scientific and technical assistance of Microscopy Australia at the Centre for Microscopy, Characterisation & Analysis, The University of Western Australia, a facility funded by the University, State and Commonwealth Governments. Data availability statement: The data that support the findings of this study are provided in the Supplementary material. Author contributions: JL, CJS, CLK, CEB designed the research or contributed to designing the research. JL, CJS, CEB, LS collected the samples. JL, CLK, CEB, XPX, LM, NK carried out the analyses. JL, CJS, CLK, CEB contributed to interpreting the results. JL wrote the manuscript. All authors provided comments on the manuscript. The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Funding AgencyGrant Number
Guangzhou Institute of GeochemistrySKLabIG-KF-18-04
Subject Keywords:Atmospheric oxygenation; Great Oxygenation Event; Continental emergence; Archean Proterozoic boundary; Oxygen Isotopes; Multiple sulfur isotopes; S-type granites; Strongly peraluminous granites
Record Number:CaltechAUTHORS:20210823-154141103
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Official Citation:Janne Liebmann, Christopher J. Spencer, Christopher L. Kirkland, Claire E. Bucholz, Xiao-Ping Xia, Laure Martin, Nami Kitchen, Leonid Shumlyanskyy, Coupling sulfur and oxygen isotope ratios in sediment melts across the Archean-Proterozoic transition, Geochimica et Cosmochimica Acta, Volume 307, 2021, Pages 242-257, ISSN 0016-7037,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:110378
Deposited By: Tony Diaz
Deposited On:24 Aug 2021 17:21
Last Modified:24 Aug 2021 17:21

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