论文部分内容阅读
Spilite-keratophyre is a key member of the Shuangxiwu Group volcanic series in Zhejiang Province.Presented in this paper are the reliable Sm-Nd internal isochron age (1012±18Ma,∈Nd(T)=4.4±0.1) and whole-rock Rb -Sr isochron age (972±40Ma,Is