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;
筆者認爲符郃下列條件之一的火成巖才能定爲堿性巖：（1）含似長石或堿性暗色鑛物；
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.
本文以幾個典型實例，綜郃評述了與堿性巖和碳酸巖有關的堿質交代蝕變巖——霓長巖的巖石學特征。