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围岩蚀变
释义
围岩蚀变
Encyclopedia
理学
围岩蚀变
释
wall rock alteration
围岩蚀变
岩石在气水热液作用下,发生原岩矿物组合、化学成分及结构构造和岩石物理性质的变化。这种围岩蚀变分布在矿体四周的围岩里,是一种成矿作用过程中热液流经地质体时发生的交代作用产物。因此围岩蚀变的范围往往超出矿体分布范围,称之为蚀变晕圈。
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