花岗岩类中的闪长质微粒包体

On Dioritic Microgranular Enclave in Granitoid

微粒包体包括显微粒状及矿物粒径可达1mm的所有火成岩状包体，分为淡色和暗色微粒包体两大类．通过讨论与暗色微粒包体大体相当的闪长质微粒包体，系统地阐述了它们的分布、地质特征、岩石特征及岩石化学特征，指出闪长质微粒包体的成因和来源是多方面的，对于不同成因包体的研究，有助于了解地壳深部源岩的物质成分特征、岩浆的混合作用及不混溶作用．

Microgranular enclave includes all igenous with forcrogranular form and grain size to 1 mm, andmay be classified into two types: leuco-eoclave and mela-eoclave. It is widely distributed in the rocks ofgranitoid. rsoritic microgranular enclave in common witk mela-enclaue is mainly discussed. The distribution,geololgical characteristics, rock and rock chendstry characteristics are systematically discribed. The multigeneses and sources of dioritic microgranular enclave are pointed out. The research on different genetic enclaves is helpful to understand tha composition characteristic of deep crust, magma mixing and immiscibility.