库赛湖-玛沁断裂带东段断层通道波的观测研究
|
摘要
断层通道波由地震波在断层带内低速介质和高速围岩之间的界面内侧多次反射相干而形成,只要震源和观测点在断层带内或附近,就可以观测到跟在S波后边的呈现长周期、大振幅的断层通道波。通过横跨库赛湖—玛沁断裂布设的小点距地震测线获得的断层通道波数据,利用有限差分正演模拟分析表明:库赛湖-玛沁断裂带东段(L2测线附近)的地表宽度为225 m,在150 m以下,断层带的宽度减小到175 m。
The observation of the fault-zone trapped waves was conducted on some seismic line with dense receivers across Hoh Sai lake-Maqen fault.It is found that the fault-zone trapped waves of long period and big amplitude will appear after S wave so long as the sources and observation points are located in or near the fault-zone.The finite difference forward simulation also shows that the surface rupture width of the eastern segment of Hoh Sai lake-Maqen fault is 225 m while the fault width reduce to 175 m in the depth below 150 m.
The observation of the fault-zone trapped waves was conducted on some seismic line with dense receivers across Hoh Sai lake-Maqen fault.It is found that the fault-zone trapped waves of long period and big amplitude will appear after S wave so long as the sources and observation points are located in or near the fault-zone.The finite difference forward simulation also shows that the surface rupture width of the eastern segment of Hoh Sai lake-Maqen fault is 225 m while the fault width reduce to 175 m in the depth below 150 m.
引文
1 Li Y G,et al.Seismic guided waves trapped in the fault zoneof the landers,Calofornia,earthquake of 1992[J].J.Geo-phys.Res.,1994,99(B6):11 705-11 722.
2 Li Y G,et al.Shallow structure of the Landers fault zone u-sing explosion excited trapped waves[J].J.Geophys.Res.,1999,104(B9):20 257-20 275.
3 Li Y G,et al.Study of the 1999 M7.1 Hector Mine,Califor-nia earthquake fault plane by trapped wave[J].Bull.Seism.Soc.Am.,2002,92(94):1 318-1 332.
4 Li Y G,et al.Mltiple fault rupture of theM7.1 HectorMine,California earthquake fault plane by trapped wave[J].J.Geophys.Res.,2003,(B3):2 165.
5 Li Y G,Aki K and Vernon F.San Jacinto fault zone guidedwaves:A discrimination for recently active fault strands nearAnza,California[J].J.Geophys.Res.,1997,102(B6):11 689-11 701.
6 Lewis M A,et al.Shallow seismic trapping structure in theSan Jacinto fault zone[J].Geophys.J.Int.,2005,162(3):867-881.
7 Ben Zion Y and Malin P.San Andreas fault zone head wavesnear Parkfield,California[J].Science,1991,251(5001):1 592-1 594.
8 Li Y G,et al.Fault-zone guided wavesfrom explosions in theSan Andreas fault at Parkfield and CienegaValley,California[J].Bull.Seism.Soc.Am.,1997,87(1):210-221.
9 Ben-Zon Y,et al.A shallow fault zone structure illuminatedby trapped waves in the Karadere-Duzce branch of the NorthAnatolian Fault,western Turkey[J].Geophys.J.Int.,2003,152(3):699-717.
10 Li Y G,et al.A delineation of the Nojima faul ruptured intheM7.2 Kobe,Japan,earthquake of 1995 using faul zonetrapped waves[J].J.Geophys.Res.,1998,103(B4):7 247-7 263.
11 Mamada Y,et al.3D finite-difference simulation of seismicfault zone waves-Application to the fault zone structure ofthe Mozumi-Sukenobu fault,central Japan[J].Earth Plan-ets Space,2002,54(11):1 055-1 058.
12 Mizuno T,et al.Deep structure of the Mozumi-Sukenobufault,central Japan,estimated from the subsurface arrayobservation of fault zone trapped waves[J].Geophys.J.Int.,2004,159(2):622-642.
13王椿镛,等.2001年11月14日昆仑山口西Ms8.1地震产生的断层带细结构研究[A].中国大陆地震学与地球内部物理学进展[C].北京:地震出版社,2004,38-58.
14楼海,等.昆仑山断层围陷波的分析和研究[J].地球物理学报,2006,49(3):788-796.
15李松林,张先康,樊计昌.利用断层围陷波研究昆仑山口西8级地震破裂面[J].地震学报,2005,27(1):42-50.
16姚志祥,王椿镛,裴正林.昆仑山断裂带围陷波的有限差分数值模拟解释[J].地球物理学报,2007,50(3):760-769.
17刘明军,等.海原断裂带断层通道波观测与破碎带宽度[J].物探与化探,2004,28(6):549-552.
18李松林,等.汤西断裂的断层围陷波初步研究[J].地震地质,2007,29(2):354-362.
19赖晓玲,李松林.汶川地震区平通镇断层围陷波探测[J].大地测量与地球动力学,2008,28(6):6-10.
20孙鸿烈,郑度主编.青藏高原形成演化与发展[M].广州:广东科技出版社,1998.
2 Li Y G,et al.Shallow structure of the Landers fault zone u-sing explosion excited trapped waves[J].J.Geophys.Res.,1999,104(B9):20 257-20 275.
3 Li Y G,et al.Study of the 1999 M7.1 Hector Mine,Califor-nia earthquake fault plane by trapped wave[J].Bull.Seism.Soc.Am.,2002,92(94):1 318-1 332.
4 Li Y G,et al.Mltiple fault rupture of theM7.1 HectorMine,California earthquake fault plane by trapped wave[J].J.Geophys.Res.,2003,(B3):2 165.
5 Li Y G,Aki K and Vernon F.San Jacinto fault zone guidedwaves:A discrimination for recently active fault strands nearAnza,California[J].J.Geophys.Res.,1997,102(B6):11 689-11 701.
6 Lewis M A,et al.Shallow seismic trapping structure in theSan Jacinto fault zone[J].Geophys.J.Int.,2005,162(3):867-881.
7 Ben Zion Y and Malin P.San Andreas fault zone head wavesnear Parkfield,California[J].Science,1991,251(5001):1 592-1 594.
8 Li Y G,et al.Fault-zone guided wavesfrom explosions in theSan Andreas fault at Parkfield and CienegaValley,California[J].Bull.Seism.Soc.Am.,1997,87(1):210-221.
9 Ben-Zon Y,et al.A shallow fault zone structure illuminatedby trapped waves in the Karadere-Duzce branch of the NorthAnatolian Fault,western Turkey[J].Geophys.J.Int.,2003,152(3):699-717.
10 Li Y G,et al.A delineation of the Nojima faul ruptured intheM7.2 Kobe,Japan,earthquake of 1995 using faul zonetrapped waves[J].J.Geophys.Res.,1998,103(B4):7 247-7 263.
11 Mamada Y,et al.3D finite-difference simulation of seismicfault zone waves-Application to the fault zone structure ofthe Mozumi-Sukenobu fault,central Japan[J].Earth Plan-ets Space,2002,54(11):1 055-1 058.
12 Mizuno T,et al.Deep structure of the Mozumi-Sukenobufault,central Japan,estimated from the subsurface arrayobservation of fault zone trapped waves[J].Geophys.J.Int.,2004,159(2):622-642.
13王椿镛,等.2001年11月14日昆仑山口西Ms8.1地震产生的断层带细结构研究[A].中国大陆地震学与地球内部物理学进展[C].北京:地震出版社,2004,38-58.
14楼海,等.昆仑山断层围陷波的分析和研究[J].地球物理学报,2006,49(3):788-796.
15李松林,张先康,樊计昌.利用断层围陷波研究昆仑山口西8级地震破裂面[J].地震学报,2005,27(1):42-50.
16姚志祥,王椿镛,裴正林.昆仑山断裂带围陷波的有限差分数值模拟解释[J].地球物理学报,2007,50(3):760-769.
17刘明军,等.海原断裂带断层通道波观测与破碎带宽度[J].物探与化探,2004,28(6):549-552.
18李松林,等.汤西断裂的断层围陷波初步研究[J].地震地质,2007,29(2):354-362.
19赖晓玲,李松林.汶川地震区平通镇断层围陷波探测[J].大地测量与地球动力学,2008,28(6):6-10.
20孙鸿烈,郑度主编.青藏高原形成演化与发展[M].广州:广东科技出版社,1998.
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