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天然盐类的沉积应服从水—盐体系相平衡的规律。因此,前人在研究海相钾盐矿床时,都依据水—盐体系相平衡的规律来讨论盐类的析出过程,指导钾盐找矿实践。世界上绝大多数的钾盐矿床都属海相成因,即以海水为主要补给来源。关于海相钾盐矿床形成的物理化学规律的研究, 早有大量资料。但对陆相盐类沉积规律的研究,尤其是钾盐沉积的研究,资料却极少。我国某红层盆地老第三系含盐层是一套内陆盐湖相沉积,并已发现钾盐矿层和多个含钾层段。我们用物理化学相平衡原理分析古卤水蒸发的析盐规律,阐明该地盐类沉积的特征及钾盐形成的规律。
The deposition of natural salts should be subject to the law of phase equilibrium of water-salt system. Therefore, when studying marine potassium deposits, the predecessors discussed the precipitation process of salt according to the law of phase equilibrium of water-salt system and guided the prospecting practice of potash. Most of the world’s potash deposits are of marine origin, that is, seawater is the main source of supply. There are a lot of data on the laws of physical and chemical formation of marine potash deposits. However, the research on the law of continental salt deposition, especially the study on the deposition of potash, is very rare. A red-bed basin in China, the old Tertiary salt is a set of inland salt lake sediments, and has found that the potash salt and more potassium-containing layers. We use the physico-chemical phase equilibrium principle analysis of ancient brine evaporation salt precipitation law to clarify the characteristics of salt deposits and the formation of potassium salts.