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
|
摘要
地震区和地震带应为两种不同的划分方案,前者是以活动块体为对象进行分区的,后者是以活动断裂带为对象进行分带的,它们的划分目的和依据是不同的。以板块和断块运动学机制,以台湾大纵谷和福建滨海断裂为边界把台湾海峡及其两岸划分为台湾东部滨海地震区、台湾地震区和福建地震区。结果显示该地区地震特征具有较好的相关性,三个地震区和区内(台湾和福建地震区)均有自东向西地震活动强度逐渐减弱,区内活动幕持续时间趋于同步增长的特点。研究显示福建地震区M≥7.0级地震本区频度是最高的,认为该地震区受菲律宾海板块NW向运动影响的同时,受华南地块SE向运动的影响是明显的。
The seismic area and the seismic belt should be two kinds of different divisions plans,the former's division bases on the activity blok,the latter's bases on the activity fault zone,the goal and the basis of their division are different.Taking the kinematics of the slab structure and the fault block as mechanism,and taking the Taiwan big longitudinal valley and the Fujian coastal fault as the boundary,it divides the Taiwan Straits and its both banks into the Taiwan east coastal seismic area,the Taiwan seismic area and the Fujian seismic area.The result shows that the characteristic of the local seism has better pertinence,in the three seismic area and the area(Taiwan and the Fujian seismic area) both has the characteristic that the seismic activity intensity gradually weakens from the east to the west and the duration of the activity veil tends to synchronous rise in the area.The research demonstrates that the Fujian seismic area M≥7.0 earthquakes frequency is the highest,it considers that this seismic area is affected by Philippine sea tectonic plate movement to the NW orientation,at the same time,obviously,it is affected by the South China block movement to the SE orientation.
The seismic area and the seismic belt should be two kinds of different divisions plans,the former's division bases on the activity blok,the latter's bases on the activity fault zone,the goal and the basis of their division are different.Taking the kinematics of the slab structure and the fault block as mechanism,and taking the Taiwan big longitudinal valley and the Fujian coastal fault as the boundary,it divides the Taiwan Straits and its both banks into the Taiwan east coastal seismic area,the Taiwan seismic area and the Fujian seismic area.The result shows that the characteristic of the local seism has better pertinence,in the three seismic area and the area(Taiwan and the Fujian seismic area) both has the characteristic that the seismic activity intensity gradually weakens from the east to the west and the duration of the activity veil tends to synchronous rise in the area.The research demonstrates that the Fujian seismic area M≥7.0 earthquakes frequency is the highest,it considers that this seismic area is affected by Philippine sea tectonic plate movement to the NW orientation,at the same time,obviously,it is affected by the South China block movement to the SE orientation.
引文
[1]郭令智,马瑞士,施央申等.论西太平洋活动大陆边缘中-新生代弧后盆地分类和演化[J].成都理工学院学报,1998,25(2):134-144.
[2]孙则兴.7.3级地震与台湾地区地震幕[J].福建地震,1995,11(1):100-103.
[3]吕培芩,刘杰,陈学忠等.台湾及东部海域强震活动性研究及其对大陆强震的预报意义[J].地震2000,20(4):57-62.
[4]史磷华,周峥嵘,鲍挺等.福建及沿海地区地震活动力源探讨[J].地震,2006,26(2):104-112.
[5]丁学仁,吴长江.台湾海峡强震活动极其动力环境[J].台湾海峡两岸,1997,16(3):339-347.
[6]马文璞.区域构造解析——方法理论和中国板块构造[M].地质出版社,1990.283-288.
[7]王志洪,卢华夏.长乐南澳韧性剪切带40Ar/Ar39热年代学研究[J].中国科学D辑,1997,27(4):294-299.
[8]丁祥焕.福建东南沿海活动断裂与地震[M].福建科学技术出版社,1999.122-135.
[9]马宗晋,王乾盈,徐杰.台湾海峡两岸横向构造的对比研究[J].中国科学D辑,2002,32(6):441-451.
[10]丁原章,梁劳.巴士系构造的地震危险性[J].华南地震,1992,12(3):1-14.
[11]陈圆田,谢志平.台湾海峡的断裂与地震活动[J].华南地震,1996,16(1):57-62.
[12]钟建强,黄慈流,詹文欢等.台西盆地新代构造的演化[J].海洋与湖沼,1996,27(3):271—278.
[13]Yu Shui-Beih and Kuo Luo Long-Chen.GPA observation of crustal deformation in Tai wan-Luzos region,geophysi-cal research letters.1999,26(7):923-926
[14]周硕愚,帅平,郭逢英等.中国福建及其边缘海域现时地壳运动定量研究[J].地震学报,2000,22(1):66-72.
[15]李延兴,胡新康,李智等.台海地区的地壳运动与变形[J].地震学报,2002,24(5):487-495.
[16]任震寰,罗振暖.华南地震区带划分的新研究.华南地震[J],1998,18(2):10-15.
[17]李献智,张国民.台湾动地震带地震活动特征及与大陆地震的关系[J].地震研究,1995,18(1):16-20.
[18]杨仕升.广西地震活动与我国主要地震区(带)地震活动的相关分析[J].西北地震学报,1998,20(2):36-42.
[19]任震寰,罗振暖,秦乃岗等.华南地震区地震活动基本特征与地震大形势再研究[J].华南地震,1998,18(1):41-49.
[20]严尊国,李普丽,狄莉莎等.东南沿海地震带(含台湾海峡地区)地震活动期的讨论[J].华南地震,1996,18(1):1-9.
[21]刘吉夫,高建华,吕坚.东南沿海活动地块的初步划分[J].华南地震,2002,22(3):20-27.
[22]陈园田,谢志平.福建滨海牛山岛—兄弟屿断裂活动性与地震[J].西北地震学报,1997,19(2):34-40.
[23]中国地震局震害防御司.中国近代地震目录(公元1912年-1990年Ms≥4.7)[M].中国科学技术出版成社,1999.
[24]王志洪,卢华夏.闽东南中生代碰撞造山带的确认证据[J].大地构造与成矿学,1997,21(3):278-284.
[25]章纯,林命周,蒋淳等.日本海沟大震与华东地区地震的相关性[J].华南地震,2000,20(3):57-63.
[26]李献志.东南沿海地震带地震序列特征与迁移规律[J].华南地震,1994,14(3):58-60.
[27]顾堇萍,吕培芩,彭美凤等.华南地区地震地震活动特征与台湾强震影响[J].地震,2004,24(1):55-59.
[2]孙则兴.7.3级地震与台湾地区地震幕[J].福建地震,1995,11(1):100-103.
[3]吕培芩,刘杰,陈学忠等.台湾及东部海域强震活动性研究及其对大陆强震的预报意义[J].地震2000,20(4):57-62.
[4]史磷华,周峥嵘,鲍挺等.福建及沿海地区地震活动力源探讨[J].地震,2006,26(2):104-112.
[5]丁学仁,吴长江.台湾海峡强震活动极其动力环境[J].台湾海峡两岸,1997,16(3):339-347.
[6]马文璞.区域构造解析——方法理论和中国板块构造[M].地质出版社,1990.283-288.
[7]王志洪,卢华夏.长乐南澳韧性剪切带40Ar/Ar39热年代学研究[J].中国科学D辑,1997,27(4):294-299.
[8]丁祥焕.福建东南沿海活动断裂与地震[M].福建科学技术出版社,1999.122-135.
[9]马宗晋,王乾盈,徐杰.台湾海峡两岸横向构造的对比研究[J].中国科学D辑,2002,32(6):441-451.
[10]丁原章,梁劳.巴士系构造的地震危险性[J].华南地震,1992,12(3):1-14.
[11]陈圆田,谢志平.台湾海峡的断裂与地震活动[J].华南地震,1996,16(1):57-62.
[12]钟建强,黄慈流,詹文欢等.台西盆地新代构造的演化[J].海洋与湖沼,1996,27(3):271—278.
[13]Yu Shui-Beih and Kuo Luo Long-Chen.GPA observation of crustal deformation in Tai wan-Luzos region,geophysi-cal research letters.1999,26(7):923-926
[14]周硕愚,帅平,郭逢英等.中国福建及其边缘海域现时地壳运动定量研究[J].地震学报,2000,22(1):66-72.
[15]李延兴,胡新康,李智等.台海地区的地壳运动与变形[J].地震学报,2002,24(5):487-495.
[16]任震寰,罗振暖.华南地震区带划分的新研究.华南地震[J],1998,18(2):10-15.
[17]李献智,张国民.台湾动地震带地震活动特征及与大陆地震的关系[J].地震研究,1995,18(1):16-20.
[18]杨仕升.广西地震活动与我国主要地震区(带)地震活动的相关分析[J].西北地震学报,1998,20(2):36-42.
[19]任震寰,罗振暖,秦乃岗等.华南地震区地震活动基本特征与地震大形势再研究[J].华南地震,1998,18(1):41-49.
[20]严尊国,李普丽,狄莉莎等.东南沿海地震带(含台湾海峡地区)地震活动期的讨论[J].华南地震,1996,18(1):1-9.
[21]刘吉夫,高建华,吕坚.东南沿海活动地块的初步划分[J].华南地震,2002,22(3):20-27.
[22]陈园田,谢志平.福建滨海牛山岛—兄弟屿断裂活动性与地震[J].西北地震学报,1997,19(2):34-40.
[23]中国地震局震害防御司.中国近代地震目录(公元1912年-1990年Ms≥4.7)[M].中国科学技术出版成社,1999.
[24]王志洪,卢华夏.闽东南中生代碰撞造山带的确认证据[J].大地构造与成矿学,1997,21(3):278-284.
[25]章纯,林命周,蒋淳等.日本海沟大震与华东地区地震的相关性[J].华南地震,2000,20(3):57-63.
[26]李献志.东南沿海地震带地震序列特征与迁移规律[J].华南地震,1994,14(3):58-60.
[27]顾堇萍,吕培芩,彭美凤等.华南地区地震地震活动特征与台湾强震影响[J].地震,2004,24(1):55-59.
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