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Selenium isotope paleobiogeochemistry

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Stueeken_Kipp_2020_SeleniumIsotope_VoR.pdf (1.409Mb)
Date
01/09/2020
Author
Stueeken, Eva E.
Kipp, Michael A.
Keywords
Selenium isotopes
Redox proxy
Earth evolution
GE Environmental Sciences
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Abstract
The attraction of selenium isotopes as a paleoenvironmental tracer lies in the high redox potential of selenium oxyanions (SeIV and SeVI), the two dominant species in the modern ocean. The largest isotopic fractionations occur during oxyanion reduction, which makes selenium isotopes a sensitive proxy for the redox evolution of our planet. As a case study we review existing data from the Neoarchean and Paleoproterozoic, which show that significant isotopic fractionations are absent until 2.5 Ga, and prolonged isotopic deviations only appear around 2.3 Ga. Selenium isotopes have thus begun to reveal complex spatiotemporal redox patterns not reflected in other proxies.
Citation
Stueeken , E E & Kipp , M A 2020 , Selenium isotope paleobiogeochemistry . in T Lyons , A Turchyn & C Reinhard (eds) , Elements in geochemical tracers in earth system science . Cambridge elements , Cambridge University Press , Cambridge , pp. 1-21 . https://doi.org/10.1017/9781108782203
Publication
Elements in geochemical tracers in earth system science
DOI
https://doi.org/10.1017/9781108782203
ISSN
2515-6454
Type
Book item
Rights
Copyright © Eva E. Stüeken and Michael A. Kipp. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the final published version of the work, which was originally published at https://doi.org/10.1017/9781108782203
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  • University of St Andrews Research
URL
https://www.cambridge.org/core/what-we-publish/elements/geochemical-tracers-in-earth-system-science
URI
http://hdl.handle.net/10023/21527

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