TIANFU MOVEMENT-A SIGNIFICANT FACTOR OF PERMIAN-TRIASSIC GAS POOLS IN THE SICHUAN BASIN

In the practices petroleum exploration in the Sichuan Basin, one would find that the Sichuan Movement can not be properly explained as a controlling factor on the formation of some structural traps. The author ot fhis paper reconstructs the ancient tectonics using the data of the sedimentation of Maanshan and Daanzhai formations. It is proposed that there was a sub-episode of Yanshanian Movement before the Sichuan Movement, and it brought about groups of contemporaneous folds by differential of uplift and subsidence in limited scale. Such a movement is named in the paper as "Tianfu Movement" which would be quite important for the oil/gas explorations in Permian and Triassic systems, even in Carboniferous System of the Sichuan Basin.