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德兴斑岩铜矿田内存在两种成因类型的伊利石 :一是特征的热液蚀变矿物 ,它是在热液流体作用过程中斜长石、云母类矿物通过伊利石化过程形成的 ,其结晶度 (IC)和膨胀层含量受携带矿质的热液流体量控制 ;二是浅变质作用自身的产物 ,其结晶度远较小于前者 ,具 2M1多型 ,且不含膨胀层 ,是原始蒙皂石完全伊利石化形成的。作者发现 ,在斑岩体和接触带内 ,伊利石结晶度小的部位 ,蚀变程度强 ,矿化品位也高。
There are two types of illite in the Dexing porphyry copper ore field: one is the characteristic hydrothermal alteration mineral, which is formed by plagioclase and mica minerals during the process of hydrothermal fluid through Erie petrochemical process, Its crystallinity (IC) and intumescent content are controlled by the amount of hydrothermal fluid carrying minerals. Second, it is a product of shallow metamorphism whose crystallinity is much less than that of the former, with 2M1 polytype and no intumescent layer The original smectite was formed completely illite. The authors found that in the porphyry bodies and contact zones, where the crystallinity of illites is small, the degree of alteration is strong and the mineralized grade is also high.