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目前,国内外对膨润土矿床的成因基本归结为如下四种类型:①喷发——沉积型;②热液蚀变型;⑨火山——沉积蚀变型;④风化残积型。前三类都可以形成经济价值较大的矿床,如美国怀俄明膨润土矿即属于第一类,意大利庞廷岛膨润土矿为第二类,以其质量优良,性质特异而著称子世。我国新疆托克逊,浙江平山等钙、钠基膨润土矿则属于第三类。风化残积型因成份较复杂、质量欠佳,所以至今未引起注意。
At present, the genesis of bentonite deposits at home and abroad basically comes down to the following four types: ① eruption - sedimentary; ② hydrothermal alteration; ⑨ volcano - sedimentary alteration; ④ weathered residual type. The first three types of deposits can form a large economic value, such as the United States Wyoming bentonite that belongs to the first category, Italy Ponting Island bentonite mine is the second category, with its excellent quality, known for its special nature. China’s Xinjiang Toksun, Zhejiang Pingshan and other calcium, sodium bentonite ore belongs to the third category. Due to the complexity of the composition of the weaker type, poor quality, so far no attention.