Characteristics of Xinchang Movement in Sichuan Basin and its geological significance

As the main episode of the Indosinian Movement in the Sichuan Basin, the Xinchang Movement at the end of the Middle Triassic is a revolutionary movement. It marked the end of marine Craton basin development as well as the beginning of Mesozoic-Cenozoic continental basin development in the Sichuan Basin. The Xinchang Movement formed the biggest placantieline of EW trend near Xinchang area. It also produced the basic structural framework called "one uplift and two depressions" in Mesozoic and Cenozoic in the middle segment of the western Sichuan Basin. The movement caused the overall uplift of the Sichuan Basin and the denudation in large scale of the Middle Triassic. Due to the supergene karstfication in the early stage and the deep-buried dis-solution in the late stage, the development of high-quality reservoir at the top of the Middle Triassic was favorable. This set of reservoir with superior forming conditions has a great exploration potential in oncoming future.