Alkali Metasomatic Alteration of the Granite in Middle Chuguang Mountain, South China
华南诸广山复式岩体中段花岗岩的碱交代蚀变

Based on chemical and Rb Sr isotopic data, it is shown that alkali metasomatic alteration of granite in Middle Zhuguang Mountain, South China, is multi stage potassium sodium metasomatism with dominant sodium metasomatic alteration. In general, the alkali metasomatism is rather weak in strength and resulted from tectono magma evolution. The alkali metasomatic granite is ore root facies of tungsten ,tin mineralization prior to uranium mineralization in granitoid in South China. The alkali was probably derived from the differential granitic magma.