汶川地震对湖北地震活动趋势的影响
|
摘要
探讨汶川地震对湖北地震活动的影响,认为龙门山断裂带与襄樊-广济构造带同属于扬子板块西部和北部边缘,是扬子板块逆冲插入青藏板块和秦岭微板块之下形成的。历史强震统计结果表明,四川中西部及周边强震活动对湖北及周边地区中强地震活动影响明显,且对应率较高。汶川地震后3年内,湖北及周边地区具有发生中等强度地震的可能。同时也指出,近几年湖北及周边的地震活动是汶川地震前期东部地区应力场调整的结果。
Effect of Wenchuan earthquake on Hubei seismic activity is discussed on the basis of the tectonic evolution,the historical seismic activity and seismic focal mechanism solutions and the conclusion considered that Longmenshan fault and the Xiangfan-Guangji tectonic belt are the western and northern marginal belts of the Yangzi plate which thrusts and intervenes downwards the Tibet and Qinling blocks.The statistics of historical strong earthquakes indicate that the strong earthquakes in western Sichuan region evidently affect seismic activity in Hubei and its adjacent region,after Wenchuan earthquake,it will be possible occuring medium-magnitude earthquakes,besides it points out that the seismic activity of Hubei province in recent several years was the adjustment of the eastern stress field in Hubei before Wenchuan earthquake.
Effect of Wenchuan earthquake on Hubei seismic activity is discussed on the basis of the tectonic evolution,the historical seismic activity and seismic focal mechanism solutions and the conclusion considered that Longmenshan fault and the Xiangfan-Guangji tectonic belt are the western and northern marginal belts of the Yangzi plate which thrusts and intervenes downwards the Tibet and Qinling blocks.The statistics of historical strong earthquakes indicate that the strong earthquakes in western Sichuan region evidently affect seismic activity in Hubei and its adjacent region,after Wenchuan earthquake,it will be possible occuring medium-magnitude earthquakes,besides it points out that the seismic activity of Hubei province in recent several years was the adjustment of the eastern stress field in Hubei before Wenchuan earthquake.
引文
1黄汲清,李春昱.中国及其邻区大地构造论文集[M].北京:地质出版社,1981.
2刘少峰,等.东秦岭-大别山及邻区挠曲类盆地深化与碰撞造山过程[J].地质科学,1999,34(3):336-346.
3杨方采,等.苏鲁大别造山带地球物理与壳幔作用[M].北京:地质出版社,2005.
4赖锡安,等.中国大陆主要活动带现今地壳运动及动力学研究[M].北京:地震出版社,2001.
5张培震.中国大陆岩石圈最新构造变动与地震灾害[J].第四纪研究,1999,5:404-413.
6 Qi Wang,Pei-zhen Zhang.Present-day crustal deforma-tion in China constrained by global positioning system meas-urements[J].Science,2001,294:574-577.
7 Alexander L,Densmore and Michael A Ellis.Active tectonicsof the Beichuan and Pengguan faults at the eastern margin ofthe Tibetan Plateau[J].Tectonics,2007,26,TC4005.
8谢富仁,等.中国大陆及邻区现代构造应力场分区[J].地震物理学报,2004,47(4):654-662.
9许忠淮,等.由大量的地震资料推断的我国大陆构造应力场[J].地球物理学报,1989,32(6):636-647.
10汪素云,等.中国地震区划文集[M].北京:地震出版社,1993.
11裴先治,等.西秦岭南缘勉略构造带主要地质特征[J].地质通报,2002,21(8-9):486-494.
12高锡铭,等.长江三峡及邻区构造应力场和震源错动类型的研究[J].地壳形变与地震,1994,14(2):1-11.
13熊继平.湖北地震史料汇考[M].北京:地震出版社,1986.
14国家地震局震害防御司.中国地震区划文集[M].北京:地震出版社,1993.
15陈运泰,等.2008年5月12日汶川特大地震震源特性分析报告[R].2008.
2刘少峰,等.东秦岭-大别山及邻区挠曲类盆地深化与碰撞造山过程[J].地质科学,1999,34(3):336-346.
3杨方采,等.苏鲁大别造山带地球物理与壳幔作用[M].北京:地质出版社,2005.
4赖锡安,等.中国大陆主要活动带现今地壳运动及动力学研究[M].北京:地震出版社,2001.
5张培震.中国大陆岩石圈最新构造变动与地震灾害[J].第四纪研究,1999,5:404-413.
6 Qi Wang,Pei-zhen Zhang.Present-day crustal deforma-tion in China constrained by global positioning system meas-urements[J].Science,2001,294:574-577.
7 Alexander L,Densmore and Michael A Ellis.Active tectonicsof the Beichuan and Pengguan faults at the eastern margin ofthe Tibetan Plateau[J].Tectonics,2007,26,TC4005.
8谢富仁,等.中国大陆及邻区现代构造应力场分区[J].地震物理学报,2004,47(4):654-662.
9许忠淮,等.由大量的地震资料推断的我国大陆构造应力场[J].地球物理学报,1989,32(6):636-647.
10汪素云,等.中国地震区划文集[M].北京:地震出版社,1993.
11裴先治,等.西秦岭南缘勉略构造带主要地质特征[J].地质通报,2002,21(8-9):486-494.
12高锡铭,等.长江三峡及邻区构造应力场和震源错动类型的研究[J].地壳形变与地震,1994,14(2):1-11.
13熊继平.湖北地震史料汇考[M].北京:地震出版社,1986.
14国家地震局震害防御司.中国地震区划文集[M].北京:地震出版社,1993.
15陈运泰,等.2008年5月12日汶川特大地震震源特性分析报告[R].2008.
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