Hydrochemical Dynamic Characteristics and Evolution of Underground Brine in the Mahai Salt Lake of the Qaidam Basin Qinghai‐Tibet Plateau
Hydrochemical Dynamic Characteristics and Evolution of Underground Brine in the Mahai Salt Lake of the Qaidam Basin Qinghai‐Tibet Plateau
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DOI：
10.1111/1755-6724.13690
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发表时间：
2018-10
期刊：
影响因子：
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通讯作者：
Shuya Hu;Quansheng Zhao;Guangcai Wang;Jianwei Zhang;Juan Feng
中科院分区：
文献类型：
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作者：
Shuya Hu;Quansheng Zhao;Guangcai Wang;Jianwei Zhang;Juan Feng
柴达木盆地马海盐湖中的矿物岩盐在水中具有很高的溶解度。此外，多组分地下卤水盐度高，易沉淀。在自然状态下，卤水在卤水层中运移极其缓慢，卤水与岩盐介质处于相对稳定的化学平衡状态。然而，在开采过程中，渗流场和化学场都有很大波动，从而破坏了平衡，导致卤水的化学成分和动态特性发生变化。因此，我们选择了马海盐湖的地下卤水，在三个开采阶段（即，地下采卤初期、开采初期、开采后期）。利用一系列分析技术，系统地研究了地下卤水的化学动力学及其演化。研究发现，蒸发和富集是马海盐湖地下卤水演化的主要机制，阳离子交换和矿物溶解/沉淀是决定卤水动力学特征和演化的关键因素。
The mineral rock salts present in the Mahai Salt Lake of the Qaidam basin exhibit high solubilities in water. In addition, the multicomponent underground brine exhibits a high salinity and is easily precipitated. In the natural state, brine transport in the brine layer is extremely slow, and the brine is in a relatively stable chemical equilibrium state with the rock salt media. However, during mining, both the seepage and the chemical fields fluctuate significantly, thereby disrupting the equilibrium and leading to variations in the chemical composition and dynamic characteristics of the brine. Therefore, we selected underground brine from the Mahai Salt Lake, collecting a total of 183 brine samples over three stages of mining (i.e., the early stage of underground brine extraction, the initial stage of mining, and the later stage of mining). Using a range of analytical techniques, the chemical dynamics of the underground brine water and its evolution were systematically studied. We found that evaporation and enrichment were the main mechanisms of underground brine evolution in the Mahai Salt Lake, with cation exchange and mineral dissolution/precipitation being key factors in determining the dynamic characteristics and evolution of the brine.