关于A型花岗岩命名问题的讨论

针对目前国内A型花岗岩命名中出现的一些问题，建议以“碱性花岗岩类”一词代替A型花岗岩。碱性花岗岩类包括碱性和过碱性花岗岩及与之伴生的英碱正长岩、石英正长岩，以及与之伴生并且成分相近的碱长花岗岩和富碱的偏铝质花岗岩。这些岩石有相近的岩石化学成分、矿物成分和成岩构造环境。采用“碱性花岗岩类”一词易为国人接受，特别是有利于初学者和野外地质填图工作者进行岩石定名。

A Discussion on the Naming of A_type Granite

In view of some disputes that have cropped up in the naming of A_type granite in China, this paper suggests that the term alkaline granitoids should be used to replace the name A_type granite. Alkaline granitoids include alkaline and peralkaline granite, its associated katnosite and quartz syenite, and its associated and compositionally_similar alkali feldspar granite and rich_alkali meta_aluminous granite. These rocks have similar petrochemical compositions, mineral constituents and rock_forming tectonic settings. The term alkaline granitoids is likely to be accepted by Chinese geologists and is especially conducive to the naming of rocks by beginners and geological mapping workers.