在野外实地考察基础上,研究人工开挖剖面并使用现代测年技术后,发现龙门山断裂带南段的前山断裂和中央断裂自晚更新世以来发生过强烈的活动。可以分辩出龙门山前山断裂南段大川- 双石断裂错断距今5-74 万a 以来的冲积层,垂直位移1-74m ;中央断裂南段五龙断裂在错断距今9 万a 左右的冲洪积地层后,被距今约7-85 万a 的坡积层覆盖,剖面上地层的垂直位移为0-73m 。 On the basis of field investigation and study of man-made excavation profiles and the use of modern dating techniques, it was found that the anterior mountains and central faults in the southern segment of the Longmenshan fault zone have undergone intense activities since the late Pleistocene. Can distinguish the alluvial layer from 5-740000 a since the fault of the Daqian-Shicanshan fault in the southern segment of Longmen Shanqian fault, with a vertical displacement of 1 -74m; the Wulong fault in the southern section of the central fault has an amplitude of about 90,000 a After alluvial stratigraphy, it has been covered by a slope of about 78,000 to 80,000 a so far. The vertical displacement of the strata in the section is 0-73 m.