This work was supported by the National Natural Science Foundation of China (Grants Nos. 49602025, 40325006 and 40025209);“Excellent Youth”of Chinese Academy of Sciences, and Natural Science Foundation of Guangdong (Grant No. 011143).
Cenozoic basalts are widely distributed in east- ern China, and some of them contain zircon megacrysts which are considered to be constituent mineral of the sub- continental lithospheric mantle (SCLM) and petrogenetic...