基于多种形变观测资料分析福建地区形变特征
|
摘要
利用福建区域GPS连续观测资料计算出应变场,由跨断层垂直形变资料计算出形变速率强度累积率,并根据跨断层、体应变等多种形变资料得到各测点压张特性的空间分布。在此基础上,研究了福建区域2005—2006年、2007—2008年、2009—2010年各时期的形变特征。研究结果表明:龙岩-厦门-东山、政海带与沙县南日岛断裂带交界处这两个区域是能量累积区域,构造活动性较强,形变速率强度较高,以压性测点为主,发生中强地震的可能性比较大。
Crustal strain field derived from the data from GPS observation network of Fujian area,the intensity accumulation rate of deformation velocity calculated from across-fault vertical deformation and tensile or compression of each station based on across-fault vertical deformation and other deformation observations are calculated,and then,based on these,the deformation characteristics in the periods:2005—2006,2007—2008 and 2009—2010 in Fujian area are studied.It shows that there are two areas,Xiamen-Longyan-Dongshan and the junction of Zhenghai and Shaxian Nanri island,with stronger tectonic activity,tendency accumulation,higher accumulation intensity,dominated mainly by compressive points,might be the zone with high risk of medium-strong earthquakes.
Crustal strain field derived from the data from GPS observation network of Fujian area,the intensity accumulation rate of deformation velocity calculated from across-fault vertical deformation and tensile or compression of each station based on across-fault vertical deformation and other deformation observations are calculated,and then,based on these,the deformation characteristics in the periods:2005—2006,2007—2008 and 2009—2010 in Fujian area are studied.It shows that there are two areas,Xiamen-Longyan-Dongshan and the junction of Zhenghai and Shaxian Nanri island,with stronger tectonic activity,tendency accumulation,higher accumulation intensity,dominated mainly by compressive points,might be the zone with high risk of medium-strong earthquakes.
引文
1邵占英,等.高精度GPS观测及其在福建东南沿海地壳形变研究中的应用[J].地壳形变与地震,1999,(4):39-44.(Shao Zhanying,et al.High precise GPS observationand its application to the crustal deformation studies insoutheast coast of Fujian province[J].Crustal Deformationand Earthquake,1999,(4):39-44)
2刘序俨,等.福建沿海地壳运动与GPS测量结果初步分析[J].地壳形变与地震,1999,(3):40-47.(Liu Xuyan,et al.Primary analysis of the crustal movement and GPS ob-servation data in Fujian coast[J].Crustal Deformation andEarthquake,1999,(3):40-47)
3周硕愚,等.中国大陆东南边缘海现时地壳运动与地震动力学综合研究[J].地壳形变与地震,2001,(1):1-13.(Zhou Suoyu,et al.Integrated research on current crustalmovement and earthquake dynamics in marginal sea,south-east of China continent[J].Crustal Deformation and Earth-quake,2001,(1):1-13)
4史粦华.福建及邻区现今地壳运动与形变[J].大地测量与地球动力学,2005,(3):69-74.(Shi Linhua.Present-day crustal movement and deformation in Fujian province andadjacent area[J].Journal of Geodesy and Geodyanmics,2005,(3):69-74)
5丁学仁,胡新康,刘序俨.福建地区地块运动时空变化特征研究[J].大地测量与地球动力学,2006,(2):58-61.(Ding Xueren,Hu Xinkang and Liu Xuyan.Study on space-time variation characteristics of crustal movement of tectomicblocks in Fujian area[J].Journal of Geodesy and Geodynam-ics,2006,(2):58-61)
6李祖宁,等.台海两岸地壳相对运动分析[J].大地测量与地球动力学,2007,(5):18-21.(Li Zuning,et al.Analy-sis of relative crustal movement between both shores of Tai-wan strait[J].Journal of Geodesy and Geodynamics,2007,(5):18-21)
7林淑冰,王志鹏,占惠.长乐-诏安断裂带垂直形变与断层活动特征分析[J].大地测量与地球动力学,2009,(5):43-46.(Lin Shubin,Wang Zhipeng and Zhan Hui.Analysisof characters of vertical deformation and fault movement ofChangle-Zhaoan fault zone[j].Journal of Geodesy and Geo-dynamics,2009,(5):43-46)
8黄松风.长诏断裂带垂直运动与地震关系初探[J].福建地震,2006,22(1-2):21-27.(Huang Songfeng.Prelimi-nary study on relation between vertical deformation andearthquake in Changzhao fault zone[J].Fujian Seismology,2006,22(1-2):21-27)
9李延兴,等.中国大陆活动地块的运动与应变状态[J].中国科学(D辑),2003,33(增刊):65-81.(Li Yanxing,etal.The movement and strain for active tectonic block of Chi-nese mainland[J].Science in China(Series D),2003,23(Supp.):65-81)
10杨少敏,王琪.昆仑山8.1级地震前中国大陆的构造应变背景[J].大地测量与地球动力学,2003,(3):61-65.(Yang Shaomin and Wang Qi.Tectonic strain back-ground in China continent before Kunlun mountainMs8.1earthquake[J].Journal of Geodesy and Geodynamics,2003,(3):61-65)
11郭良迁,等.1996年包头6.4级地震的地壳应变特征[J].地震学报,2002,24(4):348-356.(Guo Lian-gqian,et al.Characteristics of crustal strain associated withM=6.4 Baotou earthquake in 1996[J].Acta SeismologicaSinica,2002,24(4):348-356)
2刘序俨,等.福建沿海地壳运动与GPS测量结果初步分析[J].地壳形变与地震,1999,(3):40-47.(Liu Xuyan,et al.Primary analysis of the crustal movement and GPS ob-servation data in Fujian coast[J].Crustal Deformation andEarthquake,1999,(3):40-47)
3周硕愚,等.中国大陆东南边缘海现时地壳运动与地震动力学综合研究[J].地壳形变与地震,2001,(1):1-13.(Zhou Suoyu,et al.Integrated research on current crustalmovement and earthquake dynamics in marginal sea,south-east of China continent[J].Crustal Deformation and Earth-quake,2001,(1):1-13)
4史粦华.福建及邻区现今地壳运动与形变[J].大地测量与地球动力学,2005,(3):69-74.(Shi Linhua.Present-day crustal movement and deformation in Fujian province andadjacent area[J].Journal of Geodesy and Geodyanmics,2005,(3):69-74)
5丁学仁,胡新康,刘序俨.福建地区地块运动时空变化特征研究[J].大地测量与地球动力学,2006,(2):58-61.(Ding Xueren,Hu Xinkang and Liu Xuyan.Study on space-time variation characteristics of crustal movement of tectomicblocks in Fujian area[J].Journal of Geodesy and Geodynam-ics,2006,(2):58-61)
6李祖宁,等.台海两岸地壳相对运动分析[J].大地测量与地球动力学,2007,(5):18-21.(Li Zuning,et al.Analy-sis of relative crustal movement between both shores of Tai-wan strait[J].Journal of Geodesy and Geodynamics,2007,(5):18-21)
7林淑冰,王志鹏,占惠.长乐-诏安断裂带垂直形变与断层活动特征分析[J].大地测量与地球动力学,2009,(5):43-46.(Lin Shubin,Wang Zhipeng and Zhan Hui.Analysisof characters of vertical deformation and fault movement ofChangle-Zhaoan fault zone[j].Journal of Geodesy and Geo-dynamics,2009,(5):43-46)
8黄松风.长诏断裂带垂直运动与地震关系初探[J].福建地震,2006,22(1-2):21-27.(Huang Songfeng.Prelimi-nary study on relation between vertical deformation andearthquake in Changzhao fault zone[J].Fujian Seismology,2006,22(1-2):21-27)
9李延兴,等.中国大陆活动地块的运动与应变状态[J].中国科学(D辑),2003,33(增刊):65-81.(Li Yanxing,etal.The movement and strain for active tectonic block of Chi-nese mainland[J].Science in China(Series D),2003,23(Supp.):65-81)
10杨少敏,王琪.昆仑山8.1级地震前中国大陆的构造应变背景[J].大地测量与地球动力学,2003,(3):61-65.(Yang Shaomin and Wang Qi.Tectonic strain back-ground in China continent before Kunlun mountainMs8.1earthquake[J].Journal of Geodesy and Geodynamics,2003,(3):61-65)
11郭良迁,等.1996年包头6.4级地震的地壳应变特征[J].地震学报,2002,24(4):348-356.(Guo Lian-gqian,et al.Characteristics of crustal strain associated withM=6.4 Baotou earthquake in 1996[J].Acta SeismologicaSinica,2002,24(4):348-356)
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心