alkaline igneous rocks

基本解释

The author points out that only the igneous rocks fit-ting into one of the following conditions can be defined as the alkaline rocks: (1) containing feldspathoid or alkaline melaminerals;
笔者认为符合下列条件之一的火成岩才能定为碱性岩：（1）含似长石或碱性暗色矿物；
Based on several typical localities of fenites in the world, this paper systematically reviews the petrological characteristics of fenites associated with alkaline igneous rocks and carbonatites.
本文以几个典型实例，综合评述了与碱性岩和碳酸岩有关的碱质交代蚀变岩——霓长岩的岩石学特征。