利用跨断层资料研究首都圈地区断层活动特征及地震危险性
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摘要
本文针对首都圈的跨断层形变资料(1984—2016年),利用11个场地的基线和水准观测资料,计算了断层三维活动量,以此来分析首都圈断层现今的活动特征。同时计算了断层形变协调比序列,分析其与首都圈中强地震的关系。结果表明:首都圈的断层活动有明显的区域特征,受张家口-渤海断裂带影响的西北地区的断层以左旋张性活动为主,而中部和东部断层表现为右旋压性特征。断层协调比结果显示在首都圈及其邻区出现中强地震前后,协调比会出现发散现象,这种现象可以作为今后首都圈及邻近地区中强地震危险性分析的一种依据。
According to fault crossing deformation data of capital circle region, we collected a few decades of data(1984—2016). In order to analyze the present-day activity characteristics of the fault in capital circle region, the three-dimensional activity of the fault is calculated based on these data of 11 sites. The fault motion coordination ration is calculated in order to analyze the relationship with the earthquakes above medium intensity in capital circle region. The results show that: there are obvious regional characteristics of the fault activity in the capital circle region. And it provides a certain method of support for determining the seismic risk of the capital circle region and its adjacent areas in the future and the faults activity is mainly characterized by left lateral and tensional movement. The faults is mainly characterized by right-lateral and compressive movement in central and eastern capital circle region. The result of fault coordination ratio show that divergence will arise before and after the strong earthquakes occurred in the capital circle and its adjacent areas. This phenomenon can be used for the risk analysis of moderately strong earthquakes in the capital circle and adjacent areas.
According to fault crossing deformation data of capital circle region, we collected a few decades of data(1984—2016). In order to analyze the present-day activity characteristics of the fault in capital circle region, the three-dimensional activity of the fault is calculated based on these data of 11 sites. The fault motion coordination ration is calculated in order to analyze the relationship with the earthquakes above medium intensity in capital circle region. The results show that: there are obvious regional characteristics of the fault activity in the capital circle region. And it provides a certain method of support for determining the seismic risk of the capital circle region and its adjacent areas in the future and the faults activity is mainly characterized by left lateral and tensional movement. The faults is mainly characterized by right-lateral and compressive movement in central and eastern capital circle region. The result of fault coordination ratio show that divergence will arise before and after the strong earthquakes occurred in the capital circle and its adjacent areas. This phenomenon can be used for the risk analysis of moderately strong earthquakes in the capital circle and adjacent areas.
引文
薄万举,谢觉民,郭良迁,1998.八宝山断裂带形变分析与探讨.地震,18(1):63-68.
曹建玲,张晶,王辉等,2011.首都圈跨断层形变反映的断层活动方式及其成因探讨.地震,31(4):77-85.
方颖,张晶,江在森等,2015.用跨断层形变资料分析鲜水河断裂西北段的运动特征.地球物理学报,58(5):1646-1653.
郭良迁,陈聚忠,塔拉,2012.京津唐地区的现今垂直形变特征及其构造活动的含义.大地测量与地球动力学,32(4):1-4.
李腊月,邢成起,武安绪等,2013.用主成分分析方法综合分析首都圈跨断层形变资料.中国地震,29(2):246-255.
李腊月,季灵运,李玉江等,2016.基于跨断层测量的鲜水河断裂带现今活动特征及其与强震关系研究.地震学报,38(5):739-750.
李瑞莎,张希,贾晓东等,2013.断层活动协调比计算方法的改进及震例分析.中国地震,29(1):75-80.
李文静,2014.基于断层形变协调比的断层形变分析.中国地震,30(3):454-461.
刘辛中,刘志广,朱爽等,2015.安宁河-则木河断裂带断层活动特征及其与地震活动的关系.震灾防御技术,10(2):253-261.
楼关寿,周伟,金鹏等,2010.跨断层形变观测干扰因素的调查.大地测量与地球动力学,30(增刊2):68-74.
马伶俐,苏琴,李菲菲等,2015.康定6.3级地震前鲜水河南段跨断层形变异常分析.震灾防御技术,10(增刊):724-731.
吴伟伟,2014.华北地区GPS连续站坐标序列特征研究.北京:中国地震局地震预测研究所,112-114.
游丽兰,1995.跨断层测量基础理论及标准化研究.北京:地震出版社,16-35.
张晶,黎凯武,武艳强等,2011.断层活动协调比在地震预测中的应用.地震,31(3):19-26.
曹建玲,张晶,王辉等,2011.首都圈跨断层形变反映的断层活动方式及其成因探讨.地震,31(4):77-85.
方颖,张晶,江在森等,2015.用跨断层形变资料分析鲜水河断裂西北段的运动特征.地球物理学报,58(5):1646-1653.
郭良迁,陈聚忠,塔拉,2012.京津唐地区的现今垂直形变特征及其构造活动的含义.大地测量与地球动力学,32(4):1-4.
李腊月,邢成起,武安绪等,2013.用主成分分析方法综合分析首都圈跨断层形变资料.中国地震,29(2):246-255.
李腊月,季灵运,李玉江等,2016.基于跨断层测量的鲜水河断裂带现今活动特征及其与强震关系研究.地震学报,38(5):739-750.
李瑞莎,张希,贾晓东等,2013.断层活动协调比计算方法的改进及震例分析.中国地震,29(1):75-80.
李文静,2014.基于断层形变协调比的断层形变分析.中国地震,30(3):454-461.
刘辛中,刘志广,朱爽等,2015.安宁河-则木河断裂带断层活动特征及其与地震活动的关系.震灾防御技术,10(2):253-261.
楼关寿,周伟,金鹏等,2010.跨断层形变观测干扰因素的调查.大地测量与地球动力学,30(增刊2):68-74.
马伶俐,苏琴,李菲菲等,2015.康定6.3级地震前鲜水河南段跨断层形变异常分析.震灾防御技术,10(增刊):724-731.
吴伟伟,2014.华北地区GPS连续站坐标序列特征研究.北京:中国地震局地震预测研究所,112-114.
游丽兰,1995.跨断层测量基础理论及标准化研究.北京:地震出版社,16-35.
张晶,黎凯武,武艳强等,2011.断层活动协调比在地震预测中的应用.地震,31(3):19-26.