中文摘要：

锂的两个稳定同位素（6Li和7Li）相对质量差较大，因此锂同位素分馏比较显著。由于分析测量技术的改进和完善，锂同位素地球化学近年来有了长足的发展。研究表明，温度是控制锂同位素分馏的一个重要因素。此外，锂在不同矿物中配位结构和化学键强度的差异也会影响共存相之间的锂同位素分馏。由于锂同住素存在较大的分馏和不同地质体中截然不同的δ7Li值，锂同位素地质应用范围十分广泛。目前，锂同位素在地袁风化、海底热液和洋壳蚀变、板块俯冲、示踪卤水来源和演化等方面的研究中成效显著，并且开始应用到矿床学中。

英文摘要：

Lithium has two stable isotopes（6Li and 7Li）with great mass difference. Hence, Lithium istope fractionation is significant. Due to the improvement of analysing and measuring technology,lithium isotope geochemistry has been developing rapidly. Researches have shown that temperature is a key factor which control lithium isotope fractionation. In addition,The difference of lithium coordination in different miner- als and bond strength can also affect lithium isotope fractionation. Larger isotope fractionation and different lithium isotopic values in geological reservoirs make lithium isotope geological application very extensive. Up to now,lithium isotope research has made great achievements in continetal weathering, submarine hy- drothermal solution and oceanic crust altering, plates subduction and brine origin and evolution tracing. Furthermore, lithium isotope has been applied to deposit research.