福建中、北部环境剪应力动态分析
|
摘要
根据环境剪应力理论,利用中小地震震源参数计算福建中、北部环境剪应力值。在Arc-View平台上,对该地区环境剪应力分布特征、动态变化进行综合分析,发现福建中、北部环境剪应力在时间上存在模糊的强弱周期交替,空间上南强北弱,沿海强内地弱,具有成带性,受NE向长乐—东山断裂带、滨海断裂带和NW向台中—晋江断裂带、南日岛—沙县断裂带控制;空间动态变化具有从东向西迁移和以泉州海外乌丘屿附近、厦门海外两区域为中心向周边往复迁移的特点。福建中、北部地区环境剪应力值较低,未来2年是强地震弱发区。
According to ambient shear stress theory,ambient shear stress value of the central and north of Fujian Province was calculated with the source parameters of moderate and small earthquakes.The distribution characteristics of ambient shear stress and dynamic changes were analyzed synthetically based on the platform of Arc-View.It is found that ambient shear stress of central and north of Fujian province exists indistinct changes periodically with time and in the space it shows belting geographical distribution which is strong in south and costal regions,while weak in north and inland regions.Dynamic changes in the space appear such characteristics as transference from east to west,reciprocating transference from central region such as the region of Wuqiu island out of the Quanzhou sea,and the region out of Xiamen sea,to peripheral region due to the NE direction control of the Changle-Dongshan fault belt,Littoral fault belt,and NW direction control of Taizhong-Jinjiang fault belt(direction)& Nanri island-Shaxian fault belt.Ambient shear stress value in the area of central and north of Fujian Province is relative low, therefore it is unlikely that the strong earthquake will happen in next two years.
According to ambient shear stress theory,ambient shear stress value of the central and north of Fujian Province was calculated with the source parameters of moderate and small earthquakes.The distribution characteristics of ambient shear stress and dynamic changes were analyzed synthetically based on the platform of Arc-View.It is found that ambient shear stress of central and north of Fujian province exists indistinct changes periodically with time and in the space it shows belting geographical distribution which is strong in south and costal regions,while weak in north and inland regions.Dynamic changes in the space appear such characteristics as transference from east to west,reciprocating transference from central region such as the region of Wuqiu island out of the Quanzhou sea,and the region out of Xiamen sea,to peripheral region due to the NE direction control of the Changle-Dongshan fault belt,Littoral fault belt,and NW direction control of Taizhong-Jinjiang fault belt(direction)& Nanri island-Shaxian fault belt.Ambient shear stress value in the area of central and north of Fujian Province is relative low, therefore it is unlikely that the strong earthquake will happen in next two years.
引文
[1]陈培善,谷继成,李文香.从断裂力学观点研究地震的破裂过程和地震预报[J].地球物理学报,1977,20(3):185-202.
[2]陈培善等.美国南加州的构造环境剪应力场和地震危险区[J].地震学报,1998,20(2):128-136.
[3]姜长宁等.江苏及近海地区构造环境剪应力场的研究[J]地震地磁观测与研究,2001,22(1):53-58.
[4]王绍晋,余庆坤,秦嘉政,龙晓帆.用数字化地震波形资料分析云南及邻区环境剪应力场[J].地震研究,2006,29(1):50- 54.
[5]吴绍祖,丁学仁,李祖宁等.福建地区现今地壳运动变化特征研究[J].华南地震,2005,25(3):87-94.
[6]沈金瑞等.基于断块运动机制的台湾海峡两岸地震区划分及其地震关联性[J].世界地理研究,2007,16(2):94-100.
[7]陈培善,白彤霞.构造环境应力场在确定新疆地震危险区中的应用[J].内陆地震,1998,12(1):1-11.
[8]沈健健,陈莹,刘水莲.福建及邻近海域地区环境剪应力场的研究[J].福建地震,2007,23(3-4):41-43.
[9]黄福明,陈培善,王绍晋.近期地震危险区应力场的动态分析与预测强震的判据指标[J].地壳构造域地壳应力文集, 1997,(00):1-13.
[2]陈培善等.美国南加州的构造环境剪应力场和地震危险区[J].地震学报,1998,20(2):128-136.
[3]姜长宁等.江苏及近海地区构造环境剪应力场的研究[J]地震地磁观测与研究,2001,22(1):53-58.
[4]王绍晋,余庆坤,秦嘉政,龙晓帆.用数字化地震波形资料分析云南及邻区环境剪应力场[J].地震研究,2006,29(1):50- 54.
[5]吴绍祖,丁学仁,李祖宁等.福建地区现今地壳运动变化特征研究[J].华南地震,2005,25(3):87-94.
[6]沈金瑞等.基于断块运动机制的台湾海峡两岸地震区划分及其地震关联性[J].世界地理研究,2007,16(2):94-100.
[7]陈培善,白彤霞.构造环境应力场在确定新疆地震危险区中的应用[J].内陆地震,1998,12(1):1-11.
[8]沈健健,陈莹,刘水莲.福建及邻近海域地区环境剪应力场的研究[J].福建地震,2007,23(3-4):41-43.
[9]黄福明,陈培善,王绍晋.近期地震危险区应力场的动态分析与预测强震的判据指标[J].地壳构造域地壳应力文集, 1997,(00):1-13.
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