the Chinesc National"973"Project(Grant No.G1999075506);the National Natural Science Foundation of China(Grant No.40202021);A post-doctor grant for Lin W.from the JSPS(02060)is also acknowledged.
The Beihuaiyang metamorphic zone was formed by the Early Mesozoic collision of the North and South China Blocks. It consisted of the Foziling and Luzhenguan complexes and was thought to have never afforded a deep subd...