Vanadium isotope ratios (51V/50V) have potential to provide information about changes in past ocean oxygen contents.
This characteristic sets V Isotopes apart from many other metal isotope redox proxies that require more reducing conditions to register signific.
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.
Vanadium isotope ratios (51V/50V) have potential to provide information about changes in past ocean oxygen contents