Judging for characterstics of geochemical and structural environment of several caledonian granitoids in northeast Guangxi

By comparison and compositional analysis of major,rare earth and trace elements of the granitoids in the region,a comprehensive discriminant analysis on the structural environment for granite forming was made,by use of rock geochemistry and combined with the granite forming geological condition.It is proposed that the granitoids in northeast Guangxi possess same genesis and source, which came from the same magmatic crystallization differentiation in Northeast Guangxi.Crystallization differentiation for granite is the main diagenesis mode.Yue Chengling,Miao Ershan and Hai Yangshan granitic rocks were mainly formed in syngenetic collision environment,whereas Da Ning granitic rock is from pre-plate collision to collision environment.