班戈错Ⅱ湖晶间卤水蒸发硼浓度及硼同位素分馏研究

摘要

Through the simulating natural evaporation of intercrystal brine which collected from Tibet BangkogCo lake Ⅱ,we found that during the separating out of NaCl and KC1, NaCl and potassium have strong adsorption effect of boron,especially KC1. At the same time,significant boron isotopic fractionation has taken place between liquid phase and solid phase. It is worth noting that during the separating out of KCl,boron isotope reverse fractionation took place between liquid phase and solid phase,namly 11B tend to enter KCl.%通过对采自西藏班戈错Ⅱ湖晶间卤水的模拟自然蒸发,发现在NaCl和KCl析出过程中,析盐矿物对硼具有较强的吸附作用,尤其是KCl.同时,伴随着NaCl和KCl的析出,硼同位素在液相和固相之间发生了明显的分馏.值得注意的是,在KCl析出过程中,固液相之间发生了硼同位素的反分馏现象,即11B倾向于进入KCl.