the National Natural Science Foundation of China (Grant Nos.40472032,40721063 and 40672070);the National Basic Research Program of China (Grant No.2006CB403504);the Innovative Project of Chinese Academy of Sciences (Grant No.KZCX2-YW-128)
Finding of Neoproterozoic syenites at Fangcheng in the northern Qinling region of the East Qinling orogen provides an important constraint on timing of tectonic transformation to extensional regime. The alkaline pluto...