The vanadium isotopic composition of L ordinary chondrites
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Stable isotopic data of meteorites are critical for understanding the evolution of terrestrial planets. In this study, we report high-precision vanadium (V) isotopic compositions of 11 unequilibrated and equilibrated L chondrites. Our samples show an average δ51V of − 1.25‰ ± 0.38‰ (2SD, n = 11), which is ~ 0.5‰ lighter than that of the bulk silicate Earth constrained by mantle peridotites. Isotopic fractionation in type 3 ordinary chondrites vary from − 1.76‰ to − 1.29‰, whereas the δ51V of equilibrated chondrites vary from − 1.37‰ to − 1.08‰. δ51V of L chondrites do not correlate with thermal metamorphism, shock stage, or weathering degree. Future studies are required to explore the reason for V isotope variation in the solar system.
KeywordsV isotopes L ordinary chondrites Variation
This research was financially supported by the Strategic Priority Research Program (B) of the Chinese Academy of Sciences (XDB18000000), the National Science Foundation of China (41173077, 41776196, 41630206, and 41325011), the National Science and Technology Foundation Platform Project of Ministry of Science and Technology of China (2005DKA21406), and the 111 Project. We deeply appreciate constructive comments from Zhaofeng Zhang, and the Polar Research Institute of China for providing the samples. We thank Ke Zhu and Jia Liu for discussion and Shengyu Tian, Zhenhui Hou, and Jialong Liu for help with the analyses.
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