大南盘江地区晚古生代拗拉槽盆地的改造变形

主体在广西，包括滇、黔、粤部分地带的大南盘江———右江地区晚古生代拗拉槽（D—P 1 ）和后期台向斜坳陷（P 2 —T 2 ）盆地，在印支—早燕山运动期间受到哀牢山-红河古特提斯洋碰撞关闭的影响，而发生改造变形。在马关-河江、雪峰山、云开大山3个基底拆离体推覆作用下，以六盘水-紫云-都安走滑断裂带作为构造变形转换带，分别在不同区域形成了由强及弱的逆冲-褶皱递进（衰减）的构造变形域，控制了海相油气的形成、聚集与分布。

Deformation of the Late Palaeozoicaulacogen basin in the Great Nanpanjiang area

The Late Palaeozoic aulacogen（D-P 1 ）basin and later syneclise depression（P 2 -T 2 ）basin in the Great NanpanjiangˉYoujiang area are located mainly in Guangxi Province and also stretch into parts of Yunan，Guizhou，and Guangdong provinces. They experienced deformation due to the collision and closure of the AilaoshanˉHonghe prototethys ocean during the IndosinianˉEarly Yanshanian period. The over thrusting of three basal detachment bodies（MaguanˉHejiang，Xuefengshan and Yukansan）helped to form progressive tectonic deformation domains with strong to weak thrustingˉfolding in different places. The LiupanshuiˉZiyunˉDuan strikeˉslip belt acted as the deformation transform zone in the depression. These tectonic deformation domains controlled the generation，accumulation and distribution of marine oil/gas in the area.