关键词: 花岗岩, 构造环境, 成因分类, 成分演化, 判别图解

Abstract: There is a genetic relationship between the granites and their tectonic setting. Because activity of magma is controlledby the tectonic environment. In every stage of crustal evolution, the component of granites shows out a regular tendency, in which the major, trace and rare earth elements were changed. A serial methods were set up by mathematical models with granites in the typical tectonic environments. There are two diagrams for the tectonic interpretation especially for extentional environment. One is AFC diagram which is a reflection of major element in various grantic rocks. Another is F1-F2 diagram which is set up by step-discriminatory analysis. The methods to calculate the parameter ofdiagrams are showed in the paper. They can be used to discriminate the tectonic environment in which the granite sets.

Key words: granite, tectonic environment, genetic classiffication, evolution of component, disciminating diagrams