There is not the contemporary plate-tectonic system in the researching area. However, the active forms of polycycle trough (basin) developed in the area.
本区不存在现代板块构造体系，而具有多旋回海槽(盆)的活动形式。
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This paper first expounds the Polycycle Theory of Mr. Huang Jiqing related to oil and gas in the Sichuan Basin, then enumerates the development and characteristics of 6 great cycles.