The Late Archean Fuping Group of the Xiaojiao area in Pingshan County, HebeiProvince consists mainly of three metamorphic rock types of supracrustal affinity, i. e., K-feldspar leucoleptite, biotite leptite-gneiss and hornblendic rocks. Their anatectic derivativesformed in the initial stage of anatexis are petrochemically of K-feldspar granitic, trondhjemiticand granodioritic compositions respectively, and in general have inherited the main petrochemi-cal features from their parent rock types. Probably due to the fact that they contain less REE-rich accessory minerals as compared with their parent rocks, the anatectic derivatives are ingeneral lower in ∑REE content. But both the derivatives and their parent rocks have similarREE patterns, which serves as an additional indication of the genetic relationship betweenthem. The Late Archean Fuping Group of the Xiaojiao area in Pingshan County, Hebei Province consists mainly of three metamorphic rock types of supracrustal affinity, ie, K-feldspar leucoleptite, biotite leptite-gneiss and hornblendic rocks. Their anodicctic derivatives are formed in the initial stage of anatexis are petrochemically of K-feldspar granitic, trondhjemitic and granodioritic compositions respectively, and in general have inherited the main petrochemi-cal features from their parent rock types. Probably due to the fact that they contain less REE-rich accessory minerals as compared with their parent rocks, the anatectic derivatives are ingeneral lower in ΣREE content. But both the derivatives and their parent rocks have similarREE patterns, which serves as an additional indication of the genetic relationship betweenthem.