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Selenium Isotope Paleobiogeochemistry
Paperback / softback
Main Details
| Title |
Selenium Isotope Paleobiogeochemistry
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| Authors and Contributors |
By (author) Eva E. Stueken
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By (author) Michael A. Kipp
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| Series | Elements in Geochemical Tracers in Earth System Science |
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| Physical Properties |
| Format:Paperback / softback | | Pages:75 | | Dimensions(mm): Height 150,Width 230 |
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| Category/Genre | Biochemistry
Palaeontology
Global warming |
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| ISBN/Barcode |
9781108749169
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| Classifications | Dewey:546.724 |
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| Audience | | Professional & Vocational | |
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| Illustrations |
Worked examples or Exercises
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Publishing Details |
| Publisher |
Cambridge University Press
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| Imprint |
Cambridge University Press
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| Publication Date |
8 October 2020 |
| Publication Country |
United Kingdom
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Description
The attraction of selenium isotopes as a paleoenvironmental tracer lies in the high redox potential of selenium oxyanions (SeIV and SeVI), the 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.
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