中文摘要：

以川西地区晚侏罗世蓬莱镇期地层为研究对象，通过对川西北部地区、中部地区、南部地区三级层序充填特征的研究，分析了龙门山造山带与川西地区的盆山耦合关系。川西地区蓬莱镇组层序关键界面主要有3种表现形式：最大湖泛面、区域性侵蚀间断面或侵蚀不整合面、区域性平行不整合面。以此为基础，将蓬莱镇组划分为5个三级层序（SQ1-SQ5）；同时，通过对SQ3层序在川西地区沉积充填特征的研究，认为进积期（PST）龙门山构造带构造推覆作用不发育，山前地区和盆地边缘地区转变为沉积物剥蚀区，盆地内发育三角洲-湖泊沉积环境；退积期（RST）龙门山造山带构造推覆作用增强，山前地区和盆地边缘地区受此作用相对下沉，接受沉积，此时冲积扇-湖泊沉积环境发育，三角洲沉积环境不发育。

英文摘要：

In order to know the coupling relationship between the Longmenshan orogen and the areas of West Sichuan, this paper studies the sequence-sedimentary filling characteristics of Upper Jurassic Penglaizheng Formation in the areas of West Sichuan by using sequence stratigraphy. It finds that the types of the sequence boundary are manly the maximum flooding surface （mfs）, the regional erosional unconformity surface, and the parallel unconformity surface and that five third-order sedimentary sequence are divided （SQ1-SQ5）. According to the research, the sedimentary filling characteristics of SQ3, the PST system tract occurred during the stage when the tectonic movement was quiet, the sediments mainly came form the frontier of the mountain and the wedge of the areas in West Sichuan, the delta fan sedimentary system was the main setting in the basin, and the alluvial fan sedimentary system was hardly found. The RST system tract occurred during the stage when the tectonic movement happened. At this time, the sedimentation took place on the frontier of the mountain and the wedge of the areas in West Sichuan, the alluvial fan sedimentary system was the main setting, and the delta fan sedimentary system hardly developed.