华南地震2024，Vol.44Issue(3)：11-22,12.DOI:10.13512/j.hndz.2024.03.02
江苏新沂高新区钻孔联合剖面揭示的郯庐断裂带F5几何结构特征
Geometric Structural Features of the F5 in Tanlu Fault Zone Revealed by Drilling Joint Profile in High-Tech District of Xinyi City,Jiangsu Province
摘要
Abstract
The Anqiu-Juxian Fault(F5)in the Tanlu Fault Zone is the seismogenic fault of the Tancheng M81/2 earthquake in 1668.The surface rupture caused by this earthquake may have extended to the area of South Maling Mountain,south of Xinyi City center.The results of active fault detection in Xinyi City indicate that F5 passes through Xinyi City in the form of a concealed fracture,which is a Holocene active fault.On this basis,this paper carried out the precise positioning and comprehensive analysis of the joint profiles of multiple drillholes in terms of the spatial distribution and Late Quaternary activity of F5 in the high-tech zone,revealing that the fault is divided into the east and west branches,with the east branch being a Late Pleistocene fault and the west branch being a Holocene fault,showing a discontinuous right-ordered diagonal lineup,which is not a simple shear tensile order area.The results provide new information and understanding for the future seismic hazard evaluation of the Tanlu Fault Zone and the earthquake fortification of Xinyi City.关键词
郯庐断裂带/安丘—莒县断裂/活动断裂/晚第四纪/钻孔联合剖面Key words
Tanlu fault/Anqiu-Juxian fault/Active fault/Late Quaternary/Drilling joint profile分类
天文与地球科学引用本文复制引用
潘容清,陈立春,李彦宝,曹筠,王洪达,王文超..江苏新沂高新区钻孔联合剖面揭示的郯庐断裂带F5几何结构特征[J].华南地震,2024,44(3):11-22,12.基金项目
国家重点研发项目:多尺度潜在震源判别及模型构建技术研究(2022YFC3003501) （2022YFC3003501）
