This paper presents a combined petrologic, geochemical and geochronological study and Lu-Hf isotopic analysis of the Siqian granitoids in central Wuyishan. The granitoids are predominately composed of biotite monzogranite, and igneous zircons therein yielded a consistent weighted mean 206 Pb/238 U age of(140±1) Ma. Ten samples from the granitoids yielded the data K_2O+Na_2O=6.67 wt%~8.25 wt%, K_2O/Na_2O = 1.16~2.41 and A/CNK ratios of 1.01~1.25. They have high REE content of 177.73×10~(-6)~427.88×10~(-6), Z...