摘要
利用2012~2021年期间大丰跨断层水准资料,以测点垂直位移量、断层运动年变速率,断层形变趋势累计率等参数为依据,研究2012年4月~2016年9月、2016年9月~2019年4月、2019年4月~2020年9月、2020年9月~2021年2月该地区各阶段地壳垂直形变运动特征,对各阶段测线变化机理与地震关系进行分析,在此基础上对测线点位的稳定性做定性和定量分析,同时对北天山地区近年来几次大的形变异常事件进行回顾,研究表明断层在不同时段的活动速率,活动性质及活动方式存在明显差异,同阶段断层运动又存在准同步性。呼图壁M_(S)6.2地震发生在测线同步变化、应力场长期挤压、垂直形变显著的阶段。
Using the leveling data of Dafeng cross fault from 2012 to 2021,based on the vertical displacement of measuring points,the annual change rate of fault movement,the cumulative rate of fault deformation trend and other parameters,this paper studies the characteristics of vertical crustal deformation movement at various stages in the region from April 2012 to September 2016,from September 2016 to April 2019,from April 2019 to September 2020,and from September 2020 to February 2021,and analyzes the relationship between line change mechanism at various stages and earthquakes.On this basis,the stability of the survey line points is analyzed qualitatively and quantitatively.At the same time,several large deformation abnormal events in North Tianshan region in recent years are reviewed.The research shows that there are obvious differences in the activity rate,activity nature and activity mode of the fault in different periods,and there is quasi synchronization in the fault movement of the same stage.HutubiM_(S)6.2 earthquake occurred in the stage of synchronous change of survey line,long-term compression of stress field and significant vertical deformation.
作者
方伟
赵磊
刘代芹
阿卜杜塔伊尔·亚森
丁宇
孙小旭
FANG Wei;ZHAO Lei;LIU Dai-qin;Abudutayier Yasen;DING Yu;SUN Xiao-xu(Earthquake Agency of Xinjiang Uygur Autonomous Region,Urumqi 830011,Xinjiang,China)
出处
《内陆地震》
2022年第3期255-264,共10页
Inland Earthquake
基金
新疆维吾尔自治区重点研发专项(2020B03006-2)
新疆地震科学基金(202009)
新疆地震科学基金(202113)
新疆维吾尔自治区自然科学基金(2022D01A106).
关键词
大丰
跨断层
异常
形变
地震
Dafeng
Cross fault
Anomaly
Deformation
Earthquake
