摘要
During the Late Permian Changhsingian Stage-Early Triassic Induan Stage, a series of NW-trending deep-water rift basins formed along the northwestern margin of Yangtze block, which are named as the Kaijiang-Liangping rift, the Chengkou-Exi rift and the Jinmen-Dangyang rift respectively from west to east. Giant gas field has been discovered along the edges of the Kaijiang-Liangping rift, which draws broad attention to these rift basins from geologists and oil and gas explorers. In this paper, the authors study the distribution and formation mechanism of these rift systems which have good prospect in oil and gas exploration, and indicate that they were collision rifts forming during the closure of the south Qinling Ocean by the initial contact between the Yangtze Block and the South Qinling orogen.
