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本文引述了经镓在花岗岩类气成一热液蚀变岩石中的含量分布和镓铝比值资料,并对镓在该作用过程中的地球化学行为进行了探讨。获得的结果表明,镓在云英岩化作用、碱质蚀变作用和矽嘎岩化作用中的性状各有一定特征,一般说来镓在花岗岩类的云英岩化和矽嘎岩化作用中同铝有着相似的活动历史,而在碱质交代过程中其迁移与堆积则与铝无关。镓在所有蚀变岩石中均处於分散状态,主要是呈类质同象混入物的形式存在於各种铝硅酸盐矿物之中。依据镓在花岗岩体中的含量分布特点,除了指示岩石所受蚀变交代作用的种类、蚀变程度的深线,有助於成岩、成矿作用的发展演化和介质的酸碱性变化等重要地质理论问题的解决之外,鉴於一系列稀有元素在蚀变岩体中的分布与镓含量之间呈一定的正比伴随关系,因此可以设想,它还可作为在花岗岩中普查稀有金属矿床的一个可能的地球化学标志。
This paper quotes the content distribution and the Ga-Al ratio data of gallium in the hydrothermal alteration rocks of the granitoids into gas and discusses the geochemical behavior of gallium in this process. The results obtained show that the characteristics of gallium in the kyanite, alkali alteration and the role of the ductile transition have certain characteristics, in general, gallstone in the granitoids of the kerogenification and the role of ductile In the same activity with aluminum history, and in the process of alkali metamorphosis migration and accumulation have nothing to do with aluminum. Gallium is dispersed in all altered rocks and is present in a wide range of aluminosilicate minerals, primarily in the form of a homogenous mixture. According to the content distribution of gallium in granite body, besides indicating the type of alteration metasomatism, the deep line of alteration, which is helpful to the diagenesis, the evolution of mineralization and the change of acid and base of medium In addition to the solution to the problem of geology, in view of the fact that the distribution of a series of rare elements in altered rocks is in direct proportion to the gallium content, it can be assumed that it can also be used as a basis for surveying rare metal deposits in granites A possible geochemical sign.