Abstract: In the present study, potassium sulfate (K2SO4) solution was used to selectively extract the mobile forms of lithium (Li)
element from two soil samples collected from Jiajika, a rare metal mining area (No.X03 super-large rare metal orebody and No. 804
vein). The results show that the geochemical anomaly of Li mobile form is well corresponded to the position of concealed orebody, which
can effectively indicate the existence of a concealed orebody. For soils containing high content of endogenous component/exogenous
component of target elements in Jiajika area, weak extracts such as neutral salt solution are the best choice to maximally eliminate the
disturbance of endogenous components. The best extraction procedure of the mobile forms of Li element in the soil samples is as follows.
2g soil(200 mesh) is extracted by 10 mL 0.2mol/LK2SO4 solution (pH = 6.82) for 48 h.

Key words: mobile metals forms, rare metal mining area, concealed orebody, Jiajika area