唐山断裂带三维构造应力场的数值模拟
|
摘要
基于跨唐山断裂带两条深地震物探剖面,建立精细的唐山断裂带三维构造应力场有限元模型,利用GPS及地应力观测结果进行约束;与区域M≥5.0地震震源机制解比对,以检验有限元模拟结果可靠性。对唐山断裂带等效应力场及XY平面剪切应力场的分析认为,唐山断裂带的深部断裂存在孕育较强地震的可能性,唐山断裂带北东段可能继续破裂。
A fine 3-dimensional element model of Tangshan fracture zone based on 2 seismic refraction and reflection profilings across Tangshan fracture zone was presented. GPS data and tectonic stress observing results were used to constrain the simulation. in the study areawere compared to insure the reliability of the simulation was verified by the comparison of focal mechanism and the element results. Analysis results of equivalent stress and shear stress on the XY plane indicate the seismogenic possibility of Tangshan fracture zone.
A fine 3-dimensional element model of Tangshan fracture zone based on 2 seismic refraction and reflection profilings across Tangshan fracture zone was presented. GPS data and tectonic stress observing results were used to constrain the simulation. in the study areawere compared to insure the reliability of the simulation was verified by the comparison of focal mechanism and the element results. Analysis results of equivalent stress and shear stress on the XY plane indicate the seismogenic possibility of Tangshan fracture zone.
引文
1 李钦祖,靳雅敏,于新昌.华北地区的震源机制与地壳应力场[J].地震学报,1982,4(1):55-61.(Li Qinzu,Jin Yaming and Yu Xinchang.Focal mechanisms and crustal stress field in north China[J].Acta Seismologica Sinica,1982.4(1):55-61)
2 李方全,刘光勋.我国现今地应力状态及有关问题[J].地震学报,1986,8(2):156-171.(Li Fangquan and Liu Guangxun.The present state of stress in China and related problems[J].Acta Seismologica Sinica,1986,8(2):156-171)
3 丁健民,梁国平.唐山、天津和沧州地区的油井水力压裂应力测量[J].地震学报,1985,7(4):363-373.(Ding Jianmin and Liang Guoping.Stess measurement by hydraulic fracturing in oil-well of Norte China[J].Acta Seismologica Sinica,1985,7(4):363-373)
4 周海涛,郭良迁,张立成.唐山断裂现代活动性研究[J].华北地震科学,2009,21(9):17-22.(Zhou Haitao,Guo Liangqian and Zhang Licheng.Study on modern activity of Tangshan fault[J].North China Earthquake Sciences,2009,21(9):17-22)
5 尤惠川,等.唐山地震深浅构造关系研究[J].地震地质,2002,24(4):571-582.(You Huichuan,et al.Study on the relationship between shallow and deep structures in the1976 Tangshan earthqauke area[J].Seismology and Geology,2002,24(4):571-582)
6 虢顺民,等.唐山地震区域构造背景和发展模式的讨论[J].地质科学,1977,(10):305-321.(Guo Shunmin,et al.Discussion on the reginal structural background and the seismogenic model of the Tangshan earthquake[J].Scientia Geologica Sinica,1977,(10):305-321)
7 刘保金,等,唐山地震区地壳结构和构造:深地震反射剖面结果[J].地震地质,2011,33(4):901-912.(Liu Baojin,et al.Crustal structures and tectonic of Tangshan earthquake area:results from deep seismic reflection profiling[J].Seismology and Geology,2011,33(4):901-912)
8 曾融生,等.从地震折射和反射剖面结果讨论唐山地震成因[J].地球物理学报,1988,31(4):383-398.(Zeng Rongsheng,et al.Seismic refraction and reflection profilings across Tangshan epicentral region and their implication to seismogenic processes[J].Acta Geophysica Sinica,1988,31(4):383-398)
9 陈顒,黄庭芳.岩石物理学[M].合肥:中国科学技术大学出版社,2009.(Chen Yong and Huang Tingfang.Rock physics[M].Hefei:Press of University of Science and Technology of China,2009)
10 孟庆筱,等.巴东黄土坡滑坡稳定性分析[J].大地测量与地球动力学,2012,(06):65-70.(Meng Qingxiao,et al.Stability analysis of Huangtupo landslide[J].Journal of Geodesy and Geodynamics,2012,(06):65-70)
11 陈棋福.中国震例1~8册[M].北京:地震出版社,2008.(Chen Qifu.Earthquake cases of China[M].Beijing:Seismological Press,2008)
2 李方全,刘光勋.我国现今地应力状态及有关问题[J].地震学报,1986,8(2):156-171.(Li Fangquan and Liu Guangxun.The present state of stress in China and related problems[J].Acta Seismologica Sinica,1986,8(2):156-171)
3 丁健民,梁国平.唐山、天津和沧州地区的油井水力压裂应力测量[J].地震学报,1985,7(4):363-373.(Ding Jianmin and Liang Guoping.Stess measurement by hydraulic fracturing in oil-well of Norte China[J].Acta Seismologica Sinica,1985,7(4):363-373)
4 周海涛,郭良迁,张立成.唐山断裂现代活动性研究[J].华北地震科学,2009,21(9):17-22.(Zhou Haitao,Guo Liangqian and Zhang Licheng.Study on modern activity of Tangshan fault[J].North China Earthquake Sciences,2009,21(9):17-22)
5 尤惠川,等.唐山地震深浅构造关系研究[J].地震地质,2002,24(4):571-582.(You Huichuan,et al.Study on the relationship between shallow and deep structures in the1976 Tangshan earthqauke area[J].Seismology and Geology,2002,24(4):571-582)
6 虢顺民,等.唐山地震区域构造背景和发展模式的讨论[J].地质科学,1977,(10):305-321.(Guo Shunmin,et al.Discussion on the reginal structural background and the seismogenic model of the Tangshan earthquake[J].Scientia Geologica Sinica,1977,(10):305-321)
7 刘保金,等,唐山地震区地壳结构和构造:深地震反射剖面结果[J].地震地质,2011,33(4):901-912.(Liu Baojin,et al.Crustal structures and tectonic of Tangshan earthquake area:results from deep seismic reflection profiling[J].Seismology and Geology,2011,33(4):901-912)
8 曾融生,等.从地震折射和反射剖面结果讨论唐山地震成因[J].地球物理学报,1988,31(4):383-398.(Zeng Rongsheng,et al.Seismic refraction and reflection profilings across Tangshan epicentral region and their implication to seismogenic processes[J].Acta Geophysica Sinica,1988,31(4):383-398)
9 陈顒,黄庭芳.岩石物理学[M].合肥:中国科学技术大学出版社,2009.(Chen Yong and Huang Tingfang.Rock physics[M].Hefei:Press of University of Science and Technology of China,2009)
10 孟庆筱,等.巴东黄土坡滑坡稳定性分析[J].大地测量与地球动力学,2012,(06):65-70.(Meng Qingxiao,et al.Stability analysis of Huangtupo landslide[J].Journal of Geodesy and Geodynamics,2012,(06):65-70)
11 陈棋福.中国震例1~8册[M].北京:地震出版社,2008.(Chen Qifu.Earthquake cases of China[M].Beijing:Seismological Press,2008)