Selenium Isotope Paleobiogeochemistry

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Eva E. Stüeken (University of St Andrews, Scotland) Michael A. Kipp (University of Washington)

Selenium Isotope Paleobiogeochemistry

Eva E. Stüeken (University of St Andrews, Scotland), Michael A. Kipp (University of Washington)

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English

Cambridge University Press
08 October 2020

Biochemistry; Geochemistry; Oceanography (seas); Palaeontology; Global warming

Series: Elements in Geochemical Tracers in Earth System Science

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.

By: Eva E. Stüeken (University of St Andrews Scotland), Michael A. Kipp (University of Washington)
Imprint: Cambridge University Press
Country of Publication: United Kingdom
Dimensions: Height: 150mm, Width: 230mm, Spine: 2mm
Weight: 600g
ISBN: 9781108749169
ISBN 10: 110874916X
Series: Elements in Geochemical Tracers in Earth System Science
Pages: 75
Publication Date: 08 October 2020
Audience: Professional and scholarly , Undergraduate
Format: Paperback
Publisher's Status: Active

1. Introduction; 2. Materials and Analytical Methods; 3. Proxy Mechanics; 4. Case Study; 5. Future Prospects.