摘要
花岗质岩石中广泛产出的微粒花岗岩类包体的成因是多种多样的。本文通过综合与微粒花岗岩类包体形成机理相关的实验、理论资料,结合华南7个花岗岩体中岩石包体地质实例,着重讨论3种不同成因的微粒花岗岩类包体(淬冷包体、残留体和不混溶包体)在岩相学、地球化学等方面的特征。这些特征表明,3种包体分别受岩浆混合作用、部分熔融作用和交代作用、岩浆液态不混溶作用所制约,是不同岩浆作用过程的反映。
There are multifarious geneses of microgranitoid enclaves widelyoccurred in granitic rocks.Based on comprehensively review of experimentaland theoretical materials and integration of actual examples about rockenclaves in seven granitic bodies in South China, this paper mainly makesa discussion on geneses of three kinds of microgranitoid enclaves (ie.quenched enclave, restite and immiscibile enclave) and their petrogra-phical and geochemical characteristics. They are relevantly restrictedby magma mixing, partial melting and metasomatism, and liquid immisci-bility, and are reflections of various magmatic processes.
关键词
花岗岩类
包体
成因
微粒
granitoid
enclaves
cause of formation / quenched enclaves
restite
immiscibile enclaves
