The Neoarchaean high amphibolite facies Fuping Group consists mainly of metaarkosic leucoleptite, semipelitic leptitegneiss, hornblendic rocks, marbles and calcsilicate rocks, which have been partly subjected to differential anatexis. The leptitegneisses，including biotite leptite, hornblende leptite, biotiteplagioclase gneiss, hornblende plagioclase gneiss and rocks which show texturelyand structurely transformation characteristics from leptite to gneiss, are mainly composed of plagioclase, quartz and biotite and/or hornblende, with some accessory minerals such as zircon and apatite. There are some garnets in some leptite gneiss. Compared with the leptitegneiss, their anatectic derivatives are closer to low eutectic area. The anatectic derivatives are generally lower in REE and HFSE than their parent rocks because of that REEenriched accessory minerals such as zircon and apatite occur as residuals. The anatectic products and their parent rocks are quite different in Nd isotopic compositions, showing LREE/HREE ratio variation and Nd isotopic disequilibrium in the anatectic process.