Abstract: This study presents the petrological and mineralogical characteristics of granulite xenoliths from Cenozoic basalts in Nushan,Guizishan,Xilong and Qilin,Southeastern China.Garnet granulite was first discovered in Nushan Cenozoic basalt.It is significantly different from two-pyroxene granulite in mineral compositions and formation condition.Clinopyroxenes from the garnet granulites have high Al203 and Na20,and orthopyroxenes are rich in Al203. Garnet granulites formed in deep lower crust(> 40 km)and lower geotherm (19～ 25E ／km),suggesting that Nushan was in relatively stable craton at that time.Two granulite samples from Nushan contain the clinopyroxene and orthopyroxene with lower Al203 and Na20 contents.They formed in the tectonic setting with higher geotherm (31～34℃ /km),which probably was an extensional environment in continental margin or rift.Complex granulite facies xenolith types and distinct formation conditions indicate that the lower crust beneath Nushan was constructed by multi-periodic magmatism in different tectonic settings. Lower A1203 and Na20 contents characterize the salites of two-pyroxene granulites from Qilin and Leizhou basalts,Guangdong Province.T-P estimations indicate that these granulites recrystallized at shallower level(23～27km)and high geotherm environment.It is suggested that South China was in the intense extension setting during that time.Granulite xenoliths from Xilong and Xinchang of ZheJiang Province were between those of Nushan and Qilin—Leizhou in mineral composition and recrystallization condition.The rock assemblage and formation condition of Nushan granulite facies xenoliths are similar to those from Archean granulite terrene and Hannuoba granulite xenoliths in North China,and markedly different from those in South China.It is suggested that the Nushan lower crust component should be a part of North China lower crust.In South China many mafic granulites were found from north to south, showing Mesozoic mafic magma underplating was widespread under the coastal region of South China.