福建永安—晋江断裂带东南段地震动力环境分析
|
摘要
通过对永安—晋江断裂带东南段所在地区的震源机制解和构造应力场、大地形变观测、地壳三维P波速度结构等资料进行分析,得到:(1)地震动力主要来自于福建东南海中,地震动力作用与菲律滨海板块对台湾岛弧作用密切相关;(2)构造应力场主压应力轴方向大致与北西向的永安—晋江断裂带展布方向一致,地震动力波前峰大致位于泉州湾地区,动力作用方向自泉州湾向西北呈扇形散开;(3)永安—晋江断裂带东南段主要以拉张走滑运动为主,因此断裂带容易发生正断、走滑型地震。
Analyzing the data of the focal mechanism solutions,the tectonic stress field,the geodetic deformation observation and the 3D P-wave crust velocity structure in the area of southeastern of Yong'an-Jinjiang Fault,the followings results were obtained:(1) The earthquake dynamic in Fujian coast mainly comes from South-East Sea of Fujian region,and the earthquake dynamic effect is closely related to the effect of Philippines plate on Taiwan arc.(2) The direction of principal compressive stress axis in tectonic stress field is consistent with that of Yong'an-Jinjiang Fault zone in NW-direction.The wave front of earthquake dynamic is located at Quanzhou Bay region,and the direction of earthquake dynamic effect spread out from Quanzhou Bay to its northwestern area as a fan-shape.(3) The main movement of southeastern segment of Yongan-Jinjiang Fault zone is extensional strike-slip,so it is regard as the area of easily occurrence of the normal or strike-slip type earthquakes in the fault zone.
Analyzing the data of the focal mechanism solutions,the tectonic stress field,the geodetic deformation observation and the 3D P-wave crust velocity structure in the area of southeastern of Yong'an-Jinjiang Fault,the followings results were obtained:(1) The earthquake dynamic in Fujian coast mainly comes from South-East Sea of Fujian region,and the earthquake dynamic effect is closely related to the effect of Philippines plate on Taiwan arc.(2) The direction of principal compressive stress axis in tectonic stress field is consistent with that of Yong'an-Jinjiang Fault zone in NW-direction.The wave front of earthquake dynamic is located at Quanzhou Bay region,and the direction of earthquake dynamic effect spread out from Quanzhou Bay to its northwestern area as a fan-shape.(3) The main movement of southeastern segment of Yongan-Jinjiang Fault zone is extensional strike-slip,so it is regard as the area of easily occurrence of the normal or strike-slip type earthquakes in the fault zone.
引文
陈祥熊,李祖宁,林树,等.2009.福建—台湾地区三维速度结构反演、区域地震活动性及深部构造解释[C]//海峡两岸防震减灾学术研讨会论文集:134-147.福州:福建省地震学会.
崔效锋,谢富仁,赵建涛.2005.中国及邻区震源机制解分区特征[J].地震地质,27(2),298-307.
柯龙生,林世敏.1994.台湾海峡及其西边地区正常地震动态及危险性特征[J].台湾海峡,13(2):190-197.
林纪曾,蒋维强,李幼铭,等.1991.粤东、闽南沿海小震震源参数的研究[J].地震学报,13(4):420-429.
林纪曾,梁国昭,赵毅,等.1980.东南沿海地区的震源机制与构造应力场[J].地震学报,2(3):245-257.
林松建,陈为伟,郑师春.2010.福建地区地震震源深度特征的统计分析[J].地震,30(1):82-89.
林松建,丁学仁,陈为伟,等.2009.福建地区震源机制解与现代构造应力场[J].大地测量与地球动力学,29(5):27-32.
林松建,黄宗林,吴绍祖.2009.福建永安—晋江断裂带东南段地震活动及动力环境分析[C]//海峡两岸防震减灾学术研讨会论文集.福州:福建省地震学会.
史粦华,周峥嵘,鲍挺,等.2006.福建及沿海地区地震活动力源探讨[J].地震,26(2):104-112.
汪素云,许忠淮.1985.中国东部大陆的地震构造应力场[J].地震学报,7(1):17-32.
鄢家全,时振梁,汪素云,等.1979.中国及邻区现代构造应力场的区域特征[J].地震学报,1(1):9-24.
周硕愚,帅平,郭逢英,等.2000.中国福建及其边缘海域现时地壳运动定量研究——GPS、断层形变和水准等测量与震源机制结果的综合分析[J].地震学报,22(1):66-72.
卓秀榕,陈光桐.1983.闽台震源机制和区域应力场[J].地震学报,5(4):397-411.
崔效锋,谢富仁,赵建涛.2005.中国及邻区震源机制解分区特征[J].地震地质,27(2),298-307.
柯龙生,林世敏.1994.台湾海峡及其西边地区正常地震动态及危险性特征[J].台湾海峡,13(2):190-197.
林纪曾,蒋维强,李幼铭,等.1991.粤东、闽南沿海小震震源参数的研究[J].地震学报,13(4):420-429.
林纪曾,梁国昭,赵毅,等.1980.东南沿海地区的震源机制与构造应力场[J].地震学报,2(3):245-257.
林松建,陈为伟,郑师春.2010.福建地区地震震源深度特征的统计分析[J].地震,30(1):82-89.
林松建,丁学仁,陈为伟,等.2009.福建地区震源机制解与现代构造应力场[J].大地测量与地球动力学,29(5):27-32.
林松建,黄宗林,吴绍祖.2009.福建永安—晋江断裂带东南段地震活动及动力环境分析[C]//海峡两岸防震减灾学术研讨会论文集.福州:福建省地震学会.
史粦华,周峥嵘,鲍挺,等.2006.福建及沿海地区地震活动力源探讨[J].地震,26(2):104-112.
汪素云,许忠淮.1985.中国东部大陆的地震构造应力场[J].地震学报,7(1):17-32.
鄢家全,时振梁,汪素云,等.1979.中国及邻区现代构造应力场的区域特征[J].地震学报,1(1):9-24.
周硕愚,帅平,郭逢英,等.2000.中国福建及其边缘海域现时地壳运动定量研究——GPS、断层形变和水准等测量与震源机制结果的综合分析[J].地震学报,22(1):66-72.
卓秀榕,陈光桐.1983.闽台震源机制和区域应力场[J].地震学报,5(4):397-411.
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