华南地震2025，Vol.45Issue(4)：8-16,9.DOI:10.13512/j.hndz.2025.04.02
1966年邢台地震区束鹿凹陷内部断裂晚第四纪活动性钻孔联合剖面探测
Late Quaternary Active Borehole Joint Profile Detection of Internal Faults in Shulu Sag of Xingtai Seismic Zone in 1966
摘要
Abstract
From March 8 to 29,1966,there were five earthquakes above 6 magnitude in Xingtai area,including Ningjin 7.2 earthquake,which caused more than 8000 deaths.The Xingtai earthquake swarm occurred in the Shulu Depression in the south-central North China Plain.Previous data suggest that the boundary and internal faults of Shulu Depression are not active in the late Quaternary.The seismogenic structure of the 1966 Xingtai earthquake may be a hidden deep strike-slip fault,which is not related to the shallow pre-existing faults.The recent shallow seismic exploration work carried out in the Shulu Depression and its vicinity reveals that faults with shallow burial depth of upper breakpoints may be developed inside the Depression.Based on the results of the latest shallow seismic exploration work,this paper uses the borehole joint profile detection method,combined with the chronology test,to detect the breakpoints revealed by the shallow exploration in detail and analyze the age of fault activity.The detection results reveal that a steeply dipping active fault since the late Pleistocene—Xinhexi fault is also developed on the west side of the Xinhe fault on the eastern boundary of the Shulu Depression,which may be connected up and down with the deep steeply dipping strike-slip fault revealed by the early detection data.The detection results provide key information for the analysis and discussion of the seismogenic structure of the 1966 Xingtai M7.2 earthquake.关键词
1966年邢台地震/束鹿凹陷/钻孔联合剖面探测/活动断裂/华北平原Key words
1966 Xingtai M7.2 earthquake/Shulu Depression/Borehole joint profile detection/Active fracture/North China Plain分类
天文与地球科学引用本文复制引用
南伯含,李彦宝,陈立春,曹筠,潘容清..1966年邢台地震区束鹿凹陷内部断裂晚第四纪活动性钻孔联合剖面探测[J].华南地震,2025,45(4):8-16,9.基金项目
国家重点研发计划课题"多尺度潜在震源判别及模型构建技术研究"(2022YFC3003501) （2022YFC3003501）
