东亚及西太平洋地壳上地幔P波三维速度结构
|
摘要
利用ISC报告中 1 70 5 5 0条P波到时资料 (地震数为 1 2 5 0 0 ,台站数为 92 8个 ,且地震和台站都分布在研究区内 ) ,对东亚及西太平洋边缘海 ( 60°E～ 1 5 0°E ,1 0°S～ 60°N)的深至 30 0km的地壳上地幔三维速度结构进行了研究 ,分辨率达 2°× 2°.初步结果表明 :( 1 )在研究区域内东西两部分的岩石圈与上地幔低速带的结构有非常明显的差异 .横向上大体以 1 0 8°E为界 ,纵向上以 90km深度为界 ,东部与西部P波速度结构差异较大 .西部是岩石圈汇聚增厚区 ,东部是岩石圈拉张减薄区 .西部上地幔低速带不发育 ,东部低速带比西部厚 .( 2 )青藏高原地壳岩石圈巨厚 ,上地幔低速带不明显 .印度次大陆岩石圈板片以低角度下插到青藏高原之下 .( 3)日本海和菲律宾海地壳之下有高速体 ,可能是太平洋板块向东俯冲产生的 .
D velocity structure of crust and upper mantle beneath the East Asia and West Pacific marginal seas (60°E～150°E,10°S～60°N) down to the depth of 300km has been studied by using a total of 170550 P-wave first arrival times from the ISC bulletin, which are selected from 12500 events and 928 seismic stations within the studying areas. The result is given with the resolution of grid spacing of 2°×2°. The preliminary results show: (1) The P-wave velocity structure is so different between the eastern part and western part of the East Asia and West Pacific marginal seas by the boundary of 108°E. The western part is the thickening convergent lithosphere caused by Indian subcontinent colliding with the Eurasian continent, and the eastern part is a disassembly causing the lithosphere thinning and extension arising from intrusion of asthenospheric material. (2) The crust and lithosphere of the Tibet is very thick, and the LVZ is not obvious. The Indian subcontinent dived to the beneath of the Tibet. (3) There are the high-velocity anomalies beneath the Japan Sea and the Philippines Sea. It could be the evidence that the Pacific slab dived to this area.
D velocity structure of crust and upper mantle beneath the East Asia and West Pacific marginal seas (60°E～150°E,10°S～60°N) down to the depth of 300km has been studied by using a total of 170550 P-wave first arrival times from the ISC bulletin, which are selected from 12500 events and 928 seismic stations within the studying areas. The result is given with the resolution of grid spacing of 2°×2°. The preliminary results show: (1) The P-wave velocity structure is so different between the eastern part and western part of the East Asia and West Pacific marginal seas by the boundary of 108°E. The western part is the thickening convergent lithosphere caused by Indian subcontinent colliding with the Eurasian continent, and the eastern part is a disassembly causing the lithosphere thinning and extension arising from intrusion of asthenospheric material. (2) The crust and lithosphere of the Tibet is very thick, and the LVZ is not obvious. The Indian subcontinent dived to the beneath of the Tibet. (3) There are the high-velocity anomalies beneath the Japan Sea and the Philippines Sea. It could be the evidence that the Pacific slab dived to this area.
引文
[1] ZhuJS ,CaoJM ,CaiXL ,etal.HighresolutionsurfacewavetomographyineastAsiaandwestPacificmarginalseas.ChineseJournalofGeophysics,2002,45(5):646～664(inChinesewithEnglishabstract)
[2] ZhuJS ,CaoJM ,CaiXL ,etal.Studyforthree dimensionalstructureofearthinteriorandgeodynamicsinchinaandadjacentlandandsearegions.AdvanceinEarthSciences,2003,18(4):497～503(inChinesewithEnglishabstract)
[3] LiangCT .Thebodywavetomographyofeastasiaandadjacentarea:[MasterThesis].Chengdu:ChengduUniversityofTechnology,2000(inChinesewithEnglishabstract)
[4] JinAS ,LiuFT ,SunYZ .ThePwavevelocitystructureofcrustandtheuppermantleinBeijing.ChineseJournalofGeophysics,1980,23:172～182(inChinesewithEnglishabstract)
[5] LiuFT ,QuKX ,WuH ,etal.SeismictomographyoftheChinesecontinentandadjacentregion.ChineseJournalofGeophysics,1989,32(3):281～291(inChinesewithEnglishabstract)
[6] LiuJH ,LiuFT ,WuH ,etal.The3DvelocityimageofthecrustandtheuppermantleinChinasouth northsecismicbelt.ChineseJournalofGeophysics,1989,32(3):143～151(inChinesewithEnglishabstract)
[7] SunRM ,LiuFT ,LiuJH .TheseismictomographyinSichuanChina.ChineseJournalofGeophysics,1991,34(3):708～716(inChinesewithEnglishabstract)
[8] LiuRF ,ChenPS ,LiQ .The3DvelocitystructureoftheYunnanandtheadjacentarea.Actaseismologicasinica,1993,15(1)61～67(inChinesewithEnglishabstract)
[9] HuangJL ,ZhengSH ,ZhaoDP .TheseismictomographyinSichuanandYunnan.ChineseJournalofGeophysics,2001,44(Suppl.):127～135(inChinesewithEnglishabstract)
[10] DingZF ,HeZQ ,SunWG ,etal.The3DvelocitystructureofthecrustanduppermantleintheeastoftheTibetandadjacentarea.ChineseJournalofGeophysics,1999,42(2):197～205(inChinesewithEnglishabstract)
[11] XuY ,LiuFT ,LiuJH ,etal.CrustalstructureandtectonicenvironmentofstrongearthquakesintheTianShanearthquakeBelt.JournalofGeophysics,2000,43(2):184～193(inChinesewithEnglishabstract)
[12] HilstRD ,WidiyantoroS ,EngdahlER .Evidengcefordeepmantlecirculationfromglobaltomography.Nature,1997,386:578～584
[13] HilstRD ,WidiyantoroS ,CreagerKC ,etal.DeepsubductionandasphericalvariationsinP wavespeedatthebaseofEarth’s.GeodynamicsSeries,1998,28:5～20
[14] BijwaardH ,SpakmanW ,EngdahlER .Closingthegapbetweenregionalandglobaltraveltimetomography.J .Geophys.Res.,1998,103:30055～30078
[15] ZhaoDP .Seismologicalstructureofsubductionzonesanditsimplicationsforarcmagmadismanddynamics.PhysicsofEarthandPlanetaryInteriors,2001,127:197～214
[16] ZhaoDP ,HasegawaA ,KanamoriH .DeepstructureofJapansubductionzoneasdrivedfromlocal,regionalandteleseismicevents.J .Geophys.Res.,1994,99:22313～22329
[17] ZhaoDP ,HasegawaA ,HoriuchiS .TomographyimagingofPandSwavevelocitystructurebeneathnortheasternJapan.J .Geophys.Res.,1992,97:19909～19928
[18] CaoJM ,ZhuJS ,CaiXL ,etal.Thethree dimensionalearth’smodelforEurasiaandWestPacificregion.http: www.igei.cdut.edu.cnKeyanZHONGGUOSANWEI .HTM(2000)(inchinese)
[19] LeiJS ,ZhouHL ,ZhaoDP .The3DvelocitystructureofP waveinthecrustanduppermantlebeneathpamirandadjacentfegion.ChineseJournalofGeophysics,2002,45(6):802～811(inChinesewithEnglishabstract)
[20] LeiJS ,ZhouHL .3DstructureofPwaveintheuppermantlebeneathsouthwesternChinaanditsadjacentareas.Actaseismologicasinica,2002,24(2):126～134(inChinesewithEnglishabstract)
[1] 朱介寿,曹家敏,蔡学林,等.东亚及西太平洋边缘海高分辨率面波层析成像.地球物理学报,2002,45(5):646～664
[2] 朱介寿,曹家敏,蔡学林,等.中国及临近陆域海域地球内部三维结构及动力学研究.地球科学进展,2003,18(4):497～503
[3] 梁春涛.东亚及邻区地幔体波层析成像:[硕士学位论文].成都:成都理工大学,2000
[4] 金安蜀,刘福田,孙水智.北京地区地壳和上地幔三维P波速度结构.地球物理学报,1980,23:172～182
[5] 刘福田,曲克信,吴 华,等.中国大陆及其邻近地区的地震层析成像.地球物理学报,1989,32(3):281～291[6] 刘建华,刘福田,吴 华,等.中国南北地震带地壳和上地幔的三维速度图像.地球物理学报,1989,32(2):143～151
[7] 孙若昧,刘福田,刘建华.四川地区的地震层析成像.地球物理学报,1991,34(6):708～716
[8] 刘瑞丰,陈培善,李 强.云南及其邻近地区三维速度图像.地震学报,1993,15(1):61～67
[9] 黄金莉,郑斯华,赵大鹏.川滇活动构造区地震层析成像.地球物理学报,2001,44(增刊):127～135
[10] 丁志峰,何正勤,孙为国,等.青藏高原东部及其边缘地区的地壳上地幔三维速度结构.地球物理学报,1999,42(2):197～205
[11] 胥 颐,刘福田,刘建华,等.天山地震带的地壳结构与强震构造环境.地球物理学报,2000,43(2):184～193
[18] 曹家敏,朱介寿,蔡学林.欧亚大陆及西太平洋地区三维地球模型的建立.http: www.igei.cdut.edu.cnKeyanZHONGGUOSANWEI.HTM(2000)
[19] 雷建设,周蕙兰,赵大鹏.帕米尔及邻区地壳上地幔P波三维速度结构的研究.地球物理学报,2002,45(6):802～811
[20] 雷建设,周蕙兰.中国西南及邻区上地幔P波三维速度结构.地震学报,2002,24(2):126～134
[2] ZhuJS ,CaoJM ,CaiXL ,etal.Studyforthree dimensionalstructureofearthinteriorandgeodynamicsinchinaandadjacentlandandsearegions.AdvanceinEarthSciences,2003,18(4):497～503(inChinesewithEnglishabstract)
[3] LiangCT .Thebodywavetomographyofeastasiaandadjacentarea:[MasterThesis].Chengdu:ChengduUniversityofTechnology,2000(inChinesewithEnglishabstract)
[4] JinAS ,LiuFT ,SunYZ .ThePwavevelocitystructureofcrustandtheuppermantleinBeijing.ChineseJournalofGeophysics,1980,23:172～182(inChinesewithEnglishabstract)
[5] LiuFT ,QuKX ,WuH ,etal.SeismictomographyoftheChinesecontinentandadjacentregion.ChineseJournalofGeophysics,1989,32(3):281～291(inChinesewithEnglishabstract)
[6] LiuJH ,LiuFT ,WuH ,etal.The3DvelocityimageofthecrustandtheuppermantleinChinasouth northsecismicbelt.ChineseJournalofGeophysics,1989,32(3):143～151(inChinesewithEnglishabstract)
[7] SunRM ,LiuFT ,LiuJH .TheseismictomographyinSichuanChina.ChineseJournalofGeophysics,1991,34(3):708～716(inChinesewithEnglishabstract)
[8] LiuRF ,ChenPS ,LiQ .The3DvelocitystructureoftheYunnanandtheadjacentarea.Actaseismologicasinica,1993,15(1)61～67(inChinesewithEnglishabstract)
[9] HuangJL ,ZhengSH ,ZhaoDP .TheseismictomographyinSichuanandYunnan.ChineseJournalofGeophysics,2001,44(Suppl.):127～135(inChinesewithEnglishabstract)
[10] DingZF ,HeZQ ,SunWG ,etal.The3DvelocitystructureofthecrustanduppermantleintheeastoftheTibetandadjacentarea.ChineseJournalofGeophysics,1999,42(2):197～205(inChinesewithEnglishabstract)
[11] XuY ,LiuFT ,LiuJH ,etal.CrustalstructureandtectonicenvironmentofstrongearthquakesintheTianShanearthquakeBelt.JournalofGeophysics,2000,43(2):184～193(inChinesewithEnglishabstract)
[12] HilstRD ,WidiyantoroS ,EngdahlER .Evidengcefordeepmantlecirculationfromglobaltomography.Nature,1997,386:578～584
[13] HilstRD ,WidiyantoroS ,CreagerKC ,etal.DeepsubductionandasphericalvariationsinP wavespeedatthebaseofEarth’s.GeodynamicsSeries,1998,28:5～20
[14] BijwaardH ,SpakmanW ,EngdahlER .Closingthegapbetweenregionalandglobaltraveltimetomography.J .Geophys.Res.,1998,103:30055～30078
[15] ZhaoDP .Seismologicalstructureofsubductionzonesanditsimplicationsforarcmagmadismanddynamics.PhysicsofEarthandPlanetaryInteriors,2001,127:197～214
[16] ZhaoDP ,HasegawaA ,KanamoriH .DeepstructureofJapansubductionzoneasdrivedfromlocal,regionalandteleseismicevents.J .Geophys.Res.,1994,99:22313～22329
[17] ZhaoDP ,HasegawaA ,HoriuchiS .TomographyimagingofPandSwavevelocitystructurebeneathnortheasternJapan.J .Geophys.Res.,1992,97:19909～19928
[18] CaoJM ,ZhuJS ,CaiXL ,etal.Thethree dimensionalearth’smodelforEurasiaandWestPacificregion.http: www.igei.cdut.edu.cnKeyanZHONGGUOSANWEI .HTM(2000)(inchinese)
[19] LeiJS ,ZhouHL ,ZhaoDP .The3DvelocitystructureofP waveinthecrustanduppermantlebeneathpamirandadjacentfegion.ChineseJournalofGeophysics,2002,45(6):802～811(inChinesewithEnglishabstract)
[20] LeiJS ,ZhouHL .3DstructureofPwaveintheuppermantlebeneathsouthwesternChinaanditsadjacentareas.Actaseismologicasinica,2002,24(2):126～134(inChinesewithEnglishabstract)
[1] 朱介寿,曹家敏,蔡学林,等.东亚及西太平洋边缘海高分辨率面波层析成像.地球物理学报,2002,45(5):646～664
[2] 朱介寿,曹家敏,蔡学林,等.中国及临近陆域海域地球内部三维结构及动力学研究.地球科学进展,2003,18(4):497～503
[3] 梁春涛.东亚及邻区地幔体波层析成像:[硕士学位论文].成都:成都理工大学,2000
[4] 金安蜀,刘福田,孙水智.北京地区地壳和上地幔三维P波速度结构.地球物理学报,1980,23:172～182
[5] 刘福田,曲克信,吴 华,等.中国大陆及其邻近地区的地震层析成像.地球物理学报,1989,32(3):281～291[6] 刘建华,刘福田,吴 华,等.中国南北地震带地壳和上地幔的三维速度图像.地球物理学报,1989,32(2):143～151
[7] 孙若昧,刘福田,刘建华.四川地区的地震层析成像.地球物理学报,1991,34(6):708～716
[8] 刘瑞丰,陈培善,李 强.云南及其邻近地区三维速度图像.地震学报,1993,15(1):61～67
[9] 黄金莉,郑斯华,赵大鹏.川滇活动构造区地震层析成像.地球物理学报,2001,44(增刊):127～135
[10] 丁志峰,何正勤,孙为国,等.青藏高原东部及其边缘地区的地壳上地幔三维速度结构.地球物理学报,1999,42(2):197～205
[11] 胥 颐,刘福田,刘建华,等.天山地震带的地壳结构与强震构造环境.地球物理学报,2000,43(2):184～193
[18] 曹家敏,朱介寿,蔡学林.欧亚大陆及西太平洋地区三维地球模型的建立.http: www.igei.cdut.edu.cnKeyanZHONGGUOSANWEI.HTM(2000)
[19] 雷建设,周蕙兰,赵大鹏.帕米尔及邻区地壳上地幔P波三维速度结构的研究.地球物理学报,2002,45(6):802～811
[20] 雷建设,周蕙兰.中国西南及邻区上地幔P波三维速度结构.地震学报,2002,24(2):126～134
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