地震地磁观测与研究Issue(3)：1-8,8.DOI:10.3969/j.issn.1003-3246.2015.03.001
安徽北淮阳构造变形带特征与应力状态研究
Research of the Bei-Huai-Yang structure deformation belt characteristic and modern stress state in Anhui Province
摘要
Abstract
Based on the analysis of Bei-Huai-Yang structure deformation belt characteristic and effect of the alive fault,using the data of modern moderate-small earthquakes,we inverse a part of focal mechanism parameter,and analyze the characteristic of moderate-small earthquakes and stress field state by uprightness maximum amplitude ratio of first arrival P- and S- wave and focal mechanism parameter system clustering and statistic analytical method. As results,the mostly fault in Bei-Huai-Yang structure deformation belt is in active;the source of more modern moderate-small earthquakes is shallow,and the distributing of earthquakes around the M6 epicenter is thick. It maybe reflects that the medium of the near focus is relatively cracked. The result of the focal mechanism parameter system clustering and statistical analysis shows that the fault in this area is mainly strike-slip or side-slip type and still some incline-slip retrorse fault;The direction of structure stress is mainly horizontal in this area,but there is vertical structure stress. The distribution of the P axis of the main press stress is about EW,it shows that the North China and the South China stress field control this area and it is transient area of stress field. So this belt maybe looks upon as boundary of North China and South China.关键词
变形特征/地震活动/震源机制解/现代构造应力场/北淮阳构造变形带Key words
deformation characteristic/seismic activity/focal mechanism parameter/modern structure stress field/Bei-Huai-Yang structure deformation belt引用本文复制引用
刘东旺,倪红玉,沈小七,刘泽民..安徽北淮阳构造变形带特征与应力状态研究[J].地震地磁观测与研究,2015,(3):1-8,8.基金项目
安徽省地震局重点基金资助项目 （）
