【摘要】 吉林省南部辉石花岗岩类的Ｓｍ—Ｎｄ等时年龄为２４４０±８０Ｍａ，Ｒｂ—Ｓｒ等时年龄为２３４３±１１５Ｍａ，分别代表岩浆结晶年龄和后期低角内岩相变质作用年龄。辉石花岗岩晚于英云闪长质片麻岩类和淡色块状花岗岩类，形成于太古宙末期，与地壳伸展崩落作用有关，可以作为地壳克拉通化的标志。更多还原

【Abstract】 Through the study on quartz mineral characteristics,compositions,transformation temperature of quartz thermal analysis,mass spectrographic features for infrared spectroscopy and absorbance data,the ore bearing quartz or non mineral quartz can be effectively discriminated and were verified through practice.更多还原