The vanadium isotopic composition of L ordinary chondrites  

作　　者：Yongli Xue Chun-hui Li Yuhan Qi Chuantong Zhang Bingkui Miao Fang Huang 

机构地区：[1]Institution of Meteorites and Planetary Materials Research,Guilin University of Technology [2]Key Laboratory of Planetary Geological Evolution at Universities of Guangxi Province,Guilin University of Technology [3]Key Laboratory of Crust-Mantle Materials and Environments,School of Earth and Space Sciences,University of Science and Technology of China

出　　处：《Acta Geochimica》2018年第4期501-508,共8页地球化学学报（英文）

基　　金：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);the 111 Project

摘　　要：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 δ^51v 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 δ^51V of equilibrated chondrites vary from - 1.37‰ to -1.08‰. 551V 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.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 δ^(51)V 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 d^(51)V of equilibrated chondrites vary from-1.37‰ to-1.08‰. δ^(51)V 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.

关 键 词：V isotopes L ordinary chondrites VARIATION 

分 类 号：P185.83[天文地球—天文学]