【摘要】 最新调查结果表明 ,太谷断裂断错山前冲沟Ⅰ级阶地以及在黄土台地前缘形成断坎 ,在地表及探槽中多处见到断裂断错全新世地层 ,断裂的最新活动是 130 3年洪洞 8级地震 ,活动方式为右旋走滑兼正倾滑活动 .在该次地震中 ,太谷断裂与灵石隆起上的绵山西侧断裂、临汾盆地东边界的霍山山前断裂一起活动 ,形成长约 16 0km的地表破裂带 .除此之外 ,该断裂曾在全新世中期及距今 770 0年以后有过活动 .由此得到 ,在山西断陷系 ,两个断陷盆地边界断裂的贯通活动发生 8级特大大震更多还原

【Abstract】 The Taigu fault zone is one of the major 12 boundary active faults of the Shanxi fault depression system, located on the eastern boundary of the Jinzhong basin. As the latest investigation indicated, the fault zone had dislocated gully terrace of the first order, forming fault scarp in front of the loess mesa. It has been discovered in many places in ground surface and trenches that Holocene deposits were dislocated. The latest activity was the 1303 Hongdong M =8 earthquake, the fault appeared as right lateral strike slip with normal faulting. During that earthquake, the Taigu fault together with the Mianshan western side fault on the Lingshi upheaval and the Hoshan pediment fault on the eastern boundary of the Linfen basin was being active, forming a surface rupture belt of 160 km in length. Moreover, the Taigu fault has been active in the mid stage of Holocene and near 7700 a.B.P. From these we learnt that, in Shanxi fault depression system, the run through activity of two boundary faults of depression basins might generate great earthquake with M =8.更多还原