上海及其邻近地区上地幔间断面接收函数的研究
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摘要
利用上海及其邻近地区地震台网两个剖面上自2002年以来256个远震记录,提取得到高质量的接收函数,通过对这些接收函数的共转换点叠加得到研究区的间断面的分布及形态。研究结果表明,剖面上的上地幔间断面410km,660km间断面没有明显的起伏变化,从而证实了西太平洋俯冲带对中国东部的影响在东北、华北和华东有显著差别。
Using 256 teleseismic waveform data recorded by Shanghai and its neighboring seismic network since 2002, totally 423 high quality receiver functions were extracted.Through stacking these receiver functions in terms of midpoint stacks of P converted to S waves,the discontinuity distributions along with their patterns were obtained.The results show that beneath the studied area, 410 km,and 660 km discontinuities exist, and they don′t have obviously fluctuant change, then it can approve that the West Pacific plate has obvious difference on Northeast, East China, North China.
Using 256 teleseismic waveform data recorded by Shanghai and its neighboring seismic network since 2002, totally 423 high quality receiver functions were extracted.Through stacking these receiver functions in terms of midpoint stacks of P converted to S waves,the discontinuity distributions along with their patterns were obtained.The results show that beneath the studied area, 410 km,and 660 km discontinuities exist, and they don′t have obviously fluctuant change, then it can approve that the West Pacific plate has obvious difference on Northeast, East China, North China.
引文
李学清.2004.西北太平洋俯冲带上地幔间断面的研究[M].见:中国大陆地震学与地球内部物理学研究进展,北京:地震出版社
刘启元,Kind R,李顺成.1997.中国数字地震台网的接收函数及其非线性反演[J].地球物理学报,40(3):356~368
裴顺平.2004.东亚地壳上地幔P波速度地震层析成像[D].博士后毕业论文
王小平,宋秀青等.2005.接收函数方法应用的现状及其发展[J].地球物理学进展,20(2):545~549
王小平,朱元清等.2006.用远震接收函数反演上海及其邻近地区地壳速度结构[J].地震研究,29(3):239~244
吴庆举,曾融生.1998.用宽频带远震接收函数研究青藏高原的地壳结构[J].地球物理学报,41(5):669~679
Ai Y,Zheng T,Xu W,He Y,Dong D.2003.A complex660km discontinuity beneath northeast China[J].Earth Planet SciLett,212,63~71
Kind R.1978.The reflectivity method for a buried source[J].J Geophys,44,603~612
Kind R.1985.The reflectivity method for different source and receiver structures and comparision with GRF data[J].J Geo-physs,58,146~152
Kind R,Vinnik L P.1988.The upper mantle discontinuities underearth the GRF array from P-to-S converted phases[J].JGeophys,62,138~147
Li X,Sobolev S V,Kind R,Yuan X,Estabrook Ch.2000.Adetailed receive functioni mage of the upper mantle discontinuitiesin the Japan subduction zone[J].Earth Planet Sci Lett,183,527~541
Li X,Yuan X.2003.Receiver functions in northeast China-i mplications for slab penetrationinto the lower mantle in north-west Pacific subduction zone[J].Earth Planet Sci Lett,216,679~691
刘启元,Kind R,李顺成.1997.中国数字地震台网的接收函数及其非线性反演[J].地球物理学报,40(3):356~368
裴顺平.2004.东亚地壳上地幔P波速度地震层析成像[D].博士后毕业论文
王小平,宋秀青等.2005.接收函数方法应用的现状及其发展[J].地球物理学进展,20(2):545~549
王小平,朱元清等.2006.用远震接收函数反演上海及其邻近地区地壳速度结构[J].地震研究,29(3):239~244
吴庆举,曾融生.1998.用宽频带远震接收函数研究青藏高原的地壳结构[J].地球物理学报,41(5):669~679
Ai Y,Zheng T,Xu W,He Y,Dong D.2003.A complex660km discontinuity beneath northeast China[J].Earth Planet SciLett,212,63~71
Kind R.1978.The reflectivity method for a buried source[J].J Geophys,44,603~612
Kind R.1985.The reflectivity method for different source and receiver structures and comparision with GRF data[J].J Geo-physs,58,146~152
Kind R,Vinnik L P.1988.The upper mantle discontinuities underearth the GRF array from P-to-S converted phases[J].JGeophys,62,138~147
Li X,Sobolev S V,Kind R,Yuan X,Estabrook Ch.2000.Adetailed receive functioni mage of the upper mantle discontinuitiesin the Japan subduction zone[J].Earth Planet Sci Lett,183,527~541
Li X,Yuan X.2003.Receiver functions in northeast China-i mplications for slab penetrationinto the lower mantle in north-west Pacific subduction zone[J].Earth Planet Sci Lett,216,679~691
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