Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8906863 | Earth and Planetary Science Letters | 2018 | 12 Pages |
Abstract
The evolved lavas (basaltic andesites, andesites, and dacites) from the East Pacific Rise (EPR) show apparent shifts towards heavy δ51V values with increasing degree of differentiation, which can be explained by the crystal-liquid fractionation during crystallization with an inferred isotope fractionation factor of Î51Vmineral-melt=â0.15Ã106/T2. The enrichment of 51V with increasing differentiation degree for the 9°N Overlapping Spreading Center (OSC) lavas is consistent with direction of the isotope shift observed in lavas from Anatahan Island (Northern Mariana Arc) and Hekla Volcano (Iceland), but the magnitude (0.3â°) is much smaller than that (2â°) reported in Prytulak et al. (2017). Modeling of V isotope fractionation between mineral and melt shows that variations in redox condition are important for controlling V isotope fractionation, but insufficient to explain the dramatically different Î51Vmineral-melt between 9°N OSC lavas and Anatahan/Hekla suites. More studies are necessary for better understanding of mechanisms of V isotope fractionation during magmatism.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Earth and Planetary Sciences (General)
Authors
Fei Wu, Yuhan Qi, M.R. Perfit, Yongjun Gao, Charles H. Langmuir, V. Dorsey Wanless, Huimin Yu, Fang Huang,