The authors explored the age,petrogenesis and tectonic setting of intermediate-acidic dykes in Taerqi regions through the study in geological fieldwork,zircon U-Pb age and geochemical features of them. The zircon U-Pb age indicates that the intermediate dykes and acidic dykes were formed in Early Cretaceous including 141. 4~ 136. 0 Ma and 136. 5 ~ 126. 4 Ma,respectively. The geochemical data show that the intermediate dykes are characterized by medium silicon,alkali-rich,quasi-aluminous( A / CNK = 0. 8 ~ 0....