中文摘要：

四川米仓山前陆盆地东段的前陆结构特征明显，前陆冲断带和前缘隆起带发育，但受后期大巴山褶皱造山带的影响，早期北东向构造带被晚期北西向断裂复杂化。通过山前骨干剖面的平衡剖面分析和变形量计算，认为米仓山前大的构造变形发生在早三叠世末，而不是中三叠世末，并且由西向东构造变形强度、缩短量变小，形成时间变晚。受构造变形时序影响，米仓山前叠瓦冲断带、黑池梁断鼻、涪阳坝断块和南阳场区块的成藏条件具有显著区别，勘探中应各有侧重。

英文摘要：

The features of the Micangshan foreland basin are distinctive, the thrust belt and frontage upheave are well developed, and under the influence of Daba Mountain, the earlier NE structures are overlapped by later NW faults and structures, resulting in the complex tectonic features there. The analysis of key balanced seismic sections in the area and the calculation of the amount of shorten length in the layers indicate that the major tectonic movement which caused the biggest deformations was at the end of Early Triassic other than Middle Triassic. From west to east along the mountain, the intension, the amount of shorten length and the time of deformation become weaker, smaller and later, respectively. Under the influence of this kind of evolution mode and time, the pile up tile structures along the Micangshan, Heichiliang, Fuyangba and Nanyangchang areas are the promising targets for natural gas play, but the factors of pool forming in the areas are different, so different exploration strategies should be considered.