THE APPLICATION OF PARTIAL MELTING MODEL TO THE STUDY ON PETROGENESIS OF SOME SPECIES OF GRANITIC ROCKS IN SOUTHERN CHINA

71 REE data of 30 granitic rock species in southern China were collected. According tothe equilibrium partial melting model, the mineralogical and chemical compositions of theresidual phases as well as the melting degrees were calculated, which led to the determina-tion of the source materials of these granitic rock. The result shows that there are two typesof petrogenetic rocks among them, i.e. crustal granite and mixed granite. And the mixedratios were obtained for the latter case. A brief discussion on the factors affecting the REE patterns is also made.