摘要
Granite petrology has achieved significant progress since Tuttle and Bowen(1958)wrote the monograph on the Origin of granite in the light of experimental studies in the system LSi_3O_8-KAlSi_3Os-Si0_2-H_20. Since then, the compo-nents CaAL_2Si_20_8, FeO, MgO, and excess alumina have been added to the pure system Ab-Or-Qz-H_20 in order to include plagioclase and common mafic minerals in the investigations.