Dynamic changes of K, Li and B in hydrochemistry in brine of the mining area of Xitaijinair salt lake during the initial period of mining

Through analyzing the data of K,Li and B in the mining area of Lake Xitaijinair,the study results re- vealed the dynamic changes of K,Li and B and their seasons during early mining(from 2003 to 2004).The results show that the changes of contents of K,Li and B in lake brine mainly are controlled by the seasonal changes of sur- ficial runoff.Three elements' contents in underground brine during recovering are higher than those during mining. But their contents in pore brine are higher than those in intercrystalline brine and three elements'spatial differentia- tion are obviously different.Studies on the phase diagram suggest that the brine during recovering has arrived the step when the sylvite is precipitating.The brine in mining area is basically in stagnation and there was no signifi- cant correlation between water levels and three elements'contents in underground brine.The changes of K,Li and B in underground brine probably are due to the physical and chemical changes of brine itself.And in short time, mining action and surficial runoff can not evidently influence the elements'changes in hydrochemistry.