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

Abstract

通过对2003-2004年采卤初期西台吉乃尔盐湖矿区卤水中钾、锂、硼水化学数据的分析,初步揭示了其在采卤过程中的动态变化及成因.研究表明,湖卤水中钾、锂、硼的变化主要受控于地表径流变化;地下卤水中钾、锂、硼的含量在停采恢复期高于采卤期,在孔隙卤水区高于晶间卤水区,而且三者在空间上的分异程度有明显差异.相图分析表明停采恢复期已达到钾石盐析出阶段.大部分矿区的地下卤水基本处于滞流状态,地下卤水水位与钾锂硼之间没有显著的相关性.地下卤水中钾、锂、硼的变化很可能是由卤水本身物理化学性质的变化引起的,在短时间内,采卤活动和径流补给作用尚未对其产生显著影响.;Through analyzing the data of K, Li and B in the mining area of Lake Xitaijinair, the study results revealed the dynamic changes of K, Li and B and their seasons during early mining(from 2003 to 2004).The resultsshow that the changes of contents of K, Li and B in lake brine mainly are controlled by the seasonal changes of surficial 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 differentialion are obviously different. Studies on the phase diagram suggest that the brine during recovering has arrived thestep when the sylvite is precipitating. The brine in mining area is basically in stagnation and there was no signiGcant correlation between water levels and three elements'contents in underground brine. The changes of K, Li andB 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.