In Ahhui Province there are three granitoid intrusions namely Hongihen, Guandian and Chuxian, distributed on the northern bank of the Yangtie River. Various petrochemical parameters show that they are of I一type. Nevertheless, their Vd, Sr and Pb isotopic ratios are all relatively low(∈tNd = -13. 5一-15. 5, ItSr=0.7058-0.7065, 206 Pb/204pb=16. 50-16 .99，207pb/204pb=15.29-15.37)，suggesting that they are anatectic granitoids derived from Archean granulites in the lower crust. This granite type has not been included in known genetic classifications of granitoids.