大地测量与地球动力学2017，Vol.37Issue(3)：230-233,4.DOI:10.14075/j.jgg.2017.03.003
利用小震震源机制解研究太行山断裂带东南缘地区构造应力场
Research on Tectonic Stress Field in Southeastern Margin Region of Taihang Mountains Fault Zone by Focal Mechanisms of Small Earthquakes
摘要
Abstract
The focal mechanism solutions of 68 small and medium earthquakes,whichoccurred in the southeastern margin region of Taihang mountains fault zone (TMFZ),are determined by the amplitude ratio of PG and SG in vertical component records with clear initial motion.The parameters of focal mechanism solutions are analyzed using statistical and cluster analysis.The average stress field azimuth of area is calculated with the method of mechanical axis tensor.The results show that the main focal mechanism solutions arestrike-slip type in the research area,and the proportion is 57％.There are also normal and inverse fault types.The dips of both maximum and minimum stress axis are small,relatively close to level.The analysis indicates that the main characteristics of the tectonic stress field of research area are nearly NEE-SWW compression and nearly NNW-SSE expansion.关键词
中小地震/震源机制解/构造应力场/太行山断裂带东南缘地区Key words
Small and medium earthquakes/focal mechanisms/tectonic stress field/southeastern margin region of TMFZ分类
天文与地球科学引用本文复制引用
莘海亮,刘明军,康敏,王冲..利用小震震源机制解研究太行山断裂带东南缘地区构造应力场[J].大地测量与地球动力学,2017,37(3):230-233,4.基金项目
中国地震局地震科技星火计划(XH16051Y) （XH16051Y）
中国地震局地球物理勘探中心青年基金(YFGEC2016009).Spark Program of Earthquake Sciences of CEA,No.X H16051Y （YFGEC2016009）
Youth Fund of Geophysics Exploration Center,CEA,No.YFGEC2016009. （）
