IntroductionLithium (Li) isotopes are powerful tracers of silicate weathering processes. However, the geochemical behavior of lithium isotopes in granite leachates remains unclear.MethodsHere we report Li isotope compositions of leachates from a granite weathering profile in southeastern China. The parameter tau (τSi and τAl) and the Chemical Index of Alteration (CIA) were also used to characterize weathering intensity and related geochemical processes.ResultsThe Li concentration in the leachate