以GPS资料研究中国南北地震带深部构造应力场变化特征
|
摘要
本文利用中国南北地震带2004-2007年间观测的239个GPS站数据,对中国南北地震带地壳内15km深处的最大主应力和最大剪应力进行了计算分析,并将计算结果与同期发生在中国南北地震带的地震活动进行了对比分析,结果表明观测同期发生的中强震大都位于应力变化大并且有深大断裂的地区,汶川地震进一步说明,四川地区地壳内的局部应力场变化与最大剪应力变化在空间分布上与强震活动区域存在较好的一致性。
In the paper,the maximum principal stress and shear in depth 15 km of the earth was calculated with 239 GPS sites data observed during 2004 and 2007 in north-south seismic belt of china.The results were compared with moderate strong earthquakes occurred in the observation time period.The computed results showed that variation of stress was larger in western part of north-south seismic belt,such as western Sichuan and Yunnan province;the com-seismic occurred in western part of north-south seismic belt where there is big active faults.The spatial distribution of strong seismic coincided with the variation of stress and maximum principal stress in Sichuan province before Wenchuan earthquake.
In the paper,the maximum principal stress and shear in depth 15 km of the earth was calculated with 239 GPS sites data observed during 2004 and 2007 in north-south seismic belt of china.The results were compared with moderate strong earthquakes occurred in the observation time period.The computed results showed that variation of stress was larger in western part of north-south seismic belt,such as western Sichuan and Yunnan province;the com-seismic occurred in western part of north-south seismic belt where there is big active faults.The spatial distribution of strong seismic coincided with the variation of stress and maximum principal stress in Sichuan province before Wenchuan earthquake.
引文
[1]Heidbach Oliver,Ben-Avraham Zvi.Stress evolution andseismic hazard of the Dead Sea Fault System[J].Earthand Planetary Science Letters,2007,257(1-2):299-312.
[2]Johnson,Kaj M.(Department of Earth and PlanetaryScience,University of California);Burgmann,Ro-land;Larson,Kristine.Frictional properties on the SanAndreas fault near Parkfield,California,inferred frommodels of aftersli Pfollowing the 2004 earthquake[N]//Bulletin of the Seismological Society of America,v 96,n 4 B,September,2006,Supplement:S321-S338.
[3]Ching Kuo-En,Rau Ruey-Juin,Lee Jian-Cheng,HuJyr-Ching.Contemporary deformation of tectonic escapein SW Taiwan from GPS observations[J].1995-2005,Earth and Planetary Science Letters,v 262,n 3-4,Oct 30,2007:601-619.
[4]Oglesby David D Dreger Douglas S,Harris,Ruth A,Ratchkovski Natalia,Hansen Roger.Inverse kinematicand forward dynamic models of the 2002 Denali faultearthquake[J].Alaska,Bulletin of the SeismologicalSociety of America,v 94,n 6 SUPPL.B,December,2004:S214-S233.
[5]顾国华,王丽凤.GPS观测得到的1998～2003年中国大陆地壳应变[J].地震,2006,26(3).
[6]周德敏,甘卫军,任金卫,等.基于GPS观测资料反演庄浪河断裂带、马衔山北缘断裂带的滑动速率[J].地震地质,2005,27(4).
[7]熊熊,滕吉文,郑勇.中国大陆地壳运动的GPS观测及相关动力学研究[J].地球物理学进展,2004,19(1).
[8]袁金荣,徐菊生,高士钧.利用GPS观测资料反演华北地区现今构造应力场[J].地球学报,1999,20(3).
[9]王琪,赖锡安,游新兆,等.红河断裂的GPS监测与构造应力场[J].地壳形变与地震,1998,18(2).
[10]张勇,冯万鹏,许力生,等.2008年汶川大地震的时空破裂过程[J].中国科学D辑:地球科学,2008,38(10).
[11]国家重大科学工程”中国地壳运动观测网络项目组”.GPS测定的2008年汶川Ms8.0级地震的同震位移场[J].中国科学D辑:地球科学,2008,38(10):1195-1206.
[12]顾国华,王武星.GPS测得的汶川大地震同震位移[J].地震,2009,29(1).
[13]Yongliang Xiong,Dingfa Huang,Shaoguang Xu,etc.Kinematic Crustal Deformation Features of Wen-chuan Earthquake Obitained by GPS[J].Proceedingsof SPIE,2009.
[14]严更,丁方明.边界单元法基础[M].重庆:重庆大学出版社,1986:219-226.
[15]Brebbia C A.Progress in Boundary Element Methods[M].London:Pentech Press,1983,Vol.2:303-310.
[16]宋成骅,许才军,刘经南,等.青藏高原块体相对运动模型的GPS方法确定与分析[J].武汉测绘科技大学学报,1998,23(1).
[17]ShI Geng hua,Good Man R E.Block Theory and Its Ap-plication to Rock Engineering[M].Englewood C liffs:Prentice2H all,Inc,1985:295-324.
[2]Johnson,Kaj M.(Department of Earth and PlanetaryScience,University of California);Burgmann,Ro-land;Larson,Kristine.Frictional properties on the SanAndreas fault near Parkfield,California,inferred frommodels of aftersli Pfollowing the 2004 earthquake[N]//Bulletin of the Seismological Society of America,v 96,n 4 B,September,2006,Supplement:S321-S338.
[3]Ching Kuo-En,Rau Ruey-Juin,Lee Jian-Cheng,HuJyr-Ching.Contemporary deformation of tectonic escapein SW Taiwan from GPS observations[J].1995-2005,Earth and Planetary Science Letters,v 262,n 3-4,Oct 30,2007:601-619.
[4]Oglesby David D Dreger Douglas S,Harris,Ruth A,Ratchkovski Natalia,Hansen Roger.Inverse kinematicand forward dynamic models of the 2002 Denali faultearthquake[J].Alaska,Bulletin of the SeismologicalSociety of America,v 94,n 6 SUPPL.B,December,2004:S214-S233.
[5]顾国华,王丽凤.GPS观测得到的1998～2003年中国大陆地壳应变[J].地震,2006,26(3).
[6]周德敏,甘卫军,任金卫,等.基于GPS观测资料反演庄浪河断裂带、马衔山北缘断裂带的滑动速率[J].地震地质,2005,27(4).
[7]熊熊,滕吉文,郑勇.中国大陆地壳运动的GPS观测及相关动力学研究[J].地球物理学进展,2004,19(1).
[8]袁金荣,徐菊生,高士钧.利用GPS观测资料反演华北地区现今构造应力场[J].地球学报,1999,20(3).
[9]王琪,赖锡安,游新兆,等.红河断裂的GPS监测与构造应力场[J].地壳形变与地震,1998,18(2).
[10]张勇,冯万鹏,许力生,等.2008年汶川大地震的时空破裂过程[J].中国科学D辑:地球科学,2008,38(10).
[11]国家重大科学工程”中国地壳运动观测网络项目组”.GPS测定的2008年汶川Ms8.0级地震的同震位移场[J].中国科学D辑:地球科学,2008,38(10):1195-1206.
[12]顾国华,王武星.GPS测得的汶川大地震同震位移[J].地震,2009,29(1).
[13]Yongliang Xiong,Dingfa Huang,Shaoguang Xu,etc.Kinematic Crustal Deformation Features of Wen-chuan Earthquake Obitained by GPS[J].Proceedingsof SPIE,2009.
[14]严更,丁方明.边界单元法基础[M].重庆:重庆大学出版社,1986:219-226.
[15]Brebbia C A.Progress in Boundary Element Methods[M].London:Pentech Press,1983,Vol.2:303-310.
[16]宋成骅,许才军,刘经南,等.青藏高原块体相对运动模型的GPS方法确定与分析[J].武汉测绘科技大学学报,1998,23(1).
[17]ShI Geng hua,Good Man R E.Block Theory and Its Ap-plication to Rock Engineering[M].Englewood C liffs:Prentice2H all,Inc,1985:295-324.
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