【摘要】 钒(Ⅴ)是一个变价元素,其赋存状态和地球化学性质对环境的氧化还原条件非常敏感,因此Ⅴ同位素可以作为一个新的地球化学示踪剂来制约高温地质过程氧化还原条件的变化。随着多接收电感耦合等离子质谱仪(MC-ICP-MS)的发展,Ⅴ同位素的分析精度不断提高,高温地质过程的Ⅴ同位素分馏能够被分辨出来,使得Ⅴ同位素的高温地球化学研究得以开展。本文对地幔和大洋玄武岩的Ⅴ同位素组成进行了总结,综述了Ⅴ同位素在蚀变过程、部分熔融和分离结晶重要地质过程的分馏行为,对比了硅酸盐全地球与陨石之间Ⅴ同位素组成的差异,并探讨了高温Ⅴ同位素地球化学未来的发展方向。更多还原

【Abstract】 Vanadium is a redox sensitive element with multiple valances. Vanadium isotopes are thus potential to be used to study the oxidation variations of many geology processes at high temperature. Due to the development of MC-ICP-MS,highly precise Ⅴ isotope analysis can be obtained,which makes us possible to distinguish Ⅴ isotope fractionation during high-temperature processes. This study summarized the Ⅴ isotope compositions of the mantle rocks and oceanic basalts,and Ⅴ isotope fractionation during alteration,partial melting and fractional crystallization. Furthermore,this study compared V isotope compositions between the bulk silicate Earth and chondrites,and provided several possible directions for studies of Ⅴ isotope geochemistry at high temperature in the future.更多还原