This work is meant to study the formation of salt through a progressive evaporation of water of sebkha Mchiguig. The precipitated salt in the case of sebkha Mchiguig is variable along the progressive evaporation. Weights of salt before each phase of precipitation indicate a heterogeneous evaporation process cumulating at 394 g L −1 . With an increasing evaporation of Mchiguig brine, the number of precipitated mineral species increased. The cumulative number of species along the evaporation process reaches 12: Halite (NaCl) (81–96%), epsomite (MgSO 4 ·7H 2 O) (7–14%), magnesite (MgCO 3 ) (1–3%), polyhalite K 2 Ca 2 Mg(SO 4 ) 4 , 2H 2 O (2–5%), the ikaite CaCO 3 .6(H 2 O) (2.1%), langbeinite K 2 Mg 2 (SO 4 ) 3 (0.4%), celestite SrSO 4 (2.1%), sodium ozonide (NaO 3 ) (1.5%), allenite MgSO 3 (H 2 O) 6 (0.8%) hydromagnesite Mg 5 (CO 3 ) 4 (OH) 2 ·4H 2 O (0.2%) and magnesium chloride MgCl 2 (0.3%). Also, the thermodynamic theoretical modeling of the Mchiguig brine shows convergence with geochemical and mineralogical experimental data. The saline system of Mchiguig represents a geo-economic interest by its big quantity of halite and varieties of accessory minerals. However, a special care should be given to environmental and hydrodynamic repercussions of the overuse of water budget.

中文翻译：

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突尼斯中部 sebkha Mchiguig 的盐水逐渐蒸发：盐和盐水的地缘经济比较研究

这项工作旨在研究通过 sebkha Mchiguig 水的逐渐蒸发而形成的盐。在 sebkha Mchiguig 的情况下，沉淀的盐随着渐进式蒸发而变化。每个沉淀阶段之前的盐重量表明非均相蒸发过程累积为 394 g L -1 。随着 Mchiguig 盐水蒸发量的增加，沉淀矿物种类的数量增加。沿蒸发过程累积的物种数达到 12：岩盐 (NaCl) (81–96%)、泻盐 (MgSO 4 ·7H 2 O) (7–14%)、菱镁矿 (MgCO 3 ) (1–3%) , 杂卤石 K 2 Ca 2 Mg(SO 4 ) 4 , 2H 2 O (2–5%), ikaite CaCO 3 .6(H 2 O) (2.1%), langbeinite K 2 Mg 2 (SO 4 ) 3 ( 0.4%)、天青石 SrSO 4 (2.1%)、臭氧化物钠 (NaO 3 ) (1.5%)、钠长石 MgSO 3 (H 2 O) 6 (0. 8%) 水菱镁矿 Mg 5 (CO 3 ) 4 (OH) 2 ·4H 2 O (0.2%) 和氯化镁 MgCl 2 (0.3%)。此外，Mchiguig 卤水的热力学理论模型显示出与地球化学和矿物学实验数据的收敛性。Mchiguig 的盐碱系统因其大量的岩盐和多种副矿物而具有地缘经济利益。然而，应特别注意过度使用水预算对环境和水动力的影响。