Vanadium Isotopes
A Proxy for Ocean Oxygen Variations
Author(s): Sune G. Nielsen
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Vanadium isotope ratios (51V/50V) have potential to provide information about changes in past ocean oxygen contents. In particular, V isotopes may find utility in tracing variations at non-zero oxygen concentrations because the redox couple that controls V elemental and isotopic abundances in seawater (vanadate-vanadyl) appears to operate around 10M O2. This characteristic sets V isotopes apart from many other metal isotope redox proxies that require more reducing conditions to register significant changes in their isotope budgets. The oxygen abundance sensitivity range of V isotopes suggests that this paleoproxy could be particularly useful in tracing marine oxygenation changes throughout the Phanerozoic and potentially beyond.
%20have%20potential%20to%20provide%20information%20about%20changes%20in%20past%20ocean%20oxygen%20contents.%20In%20particular,%20V%20isotopes%20may%20find%20utility%20in%20tracing%20variations%20at%20non-zero%20oxy...){kind=link}
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