Holocene activities of the Taigu fault zone, Shanxi Province, and their relations with the 1303 Hongdong M=8 earthquake  

作　　者：谢新生[1] 江娃利[1] 王焕贞[1] 冯西英[1] 

机构地区：[1]Institute of Crust Dynamics, China Earthquake Administration, Beijing, 100085, China

出　　处：《地震学报》2004年第3期281-293,共13页Acta Seismologica Sinica

基　　金：Chinese Joint Seismological Science Foundation (201017).

摘　　要：The Taigu fault zone is one of the major 12 active boundary 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 earthquake M=8, 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 Huoshan 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 were active in the mid-stage of Holocene and near 7 700 aB.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.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.

关 键 词：太谷断裂 全新世活动 1303年洪洞地震 地表破裂带 

分 类 号：P315.2[天文地球—地震学]