Abstract:

"Dongwu Movement" was named by Professor Li Siguang (1931) on thebasis of the angular unconformity between the Qixia Formation and Longtancoal series in the eastern suburb of Nanjing, i.e., in Qinglong Mount (Guantang) and along Shizi Mount near Longtan. It is taken over by the vast num-bers of Chinese geologists in the past 50 years. In recent years, however, the existance of "Dongwu Movement" has been disputed along with the deepening research and the accumulation of large amount of new data. Based on the analysis by combining histories of sedimentary formation with that of taphrogenic development, the autbors prove that "Dongwu Movement" in South China terrain is inexistance. The disconformity between the Lower and Upper Permianin the Yangzi Terrain may be named as "Chuanqian Movement". This movement occured from Middle-Late Maokou in the Early Permian to Early Longtan ofthe Late Permian. It was one episode of the Variscan taplirogenic cycle that bappened in the Yangzi Terrain. While the crust was on the mechanism of pulling apart.the Yangzi and South China Terrains underwent repeated and wavelike til-ting up and down,just like a balance during the Permian, thus resulting in theraising up deformation all over Yangzi Terrain. This movement did not onlyshow differential elevation and subsidence between blocks in the terrain, but also resulted in basalt eruption and its mineralization in the rhombic rift-subsided basin. Therefore, the negation of "Dongwu Movement" and the new idea on"Chuanqian Movement" may be helpful in exploring the pattern of crust movement in Variscan taphrogenic cycle.