Based on an investigation of the texture relationships between cordierite and other minerals of the Quartzofeldspathic gneisses in the Larsemann Hills, East Antarctica, especially the corrosion and crosscutting relationships between cordierite and other minerals, the authors discerned two distinct assemblages, viz., the felsic assemblage Pl+Kfs+Qtz(Grt) and the mafic assemblageCrd + Opq + Spl±Qtz . Texture and composition analysissuggeststhat cordierite might have been derived from the media quite likely in the melt state. That is, during the transformation from high_grade metamorphism to anatexis of the high grade rocks in the study area, the melt appeared first: Bt+Sil+Qtz→Grt+Melt, followed by the segregation of felsic and mafic components. The two components in the melt were immiscible and differentiated into two parts, Melt1and Melt2, which crystallized separately and formed the felsic and mafic mineral assemblages, respectively. Cordierite was not formed as a cotectic magmatic phase relatively late in peraluminous melts and the presence of the mineral had no direct relation with the felsic melt. The mafic components rich in Mg and Fe but poor in Si and Ca may have been concentrated to form cordierite. Although the mafic component was substantially derived from biotite, the contact of biotite and cordierite can rarely be found due to the face that there existed a time gap between biotite decomposition and the final crystallization of cordierite. Temporally the cordierite crystallized at the late stage of anatexis essentially brought about in the decompression process.