利用接收函数方法研究腾冲地区S波速度结构
|
摘要
腾冲地区邻近印度板块与欧亚板块碰撞、俯冲的边界,地质环境和构造背景十分复杂,是我国地震、火山活动比较活跃的地区之一.本文采用最大熵谱反褶积方法提取腾冲地区1.0°×0.8°范围内5个流动数字地震台站的宽频带远震接收函数,反演得到台站下方0～100km深度范围的S波速度结构,分析讨论了该地区的深部构造特征.结果表明:1)腾冲地区地质结构存在明显的横向非均匀性;2)盈江断裂两侧莫霍面深度有较大差异;3)腾冲和高黎贡山之间是地壳厚度和S波速度变化的高梯度带;4)盈江断裂东南、新生破裂带以西附近地区存在明显的低速层;5)盈江断裂和新生破裂带都可能对火山区的熔融体具有阻隔作用.
Tengchong Area is located at the boundary of collision and subduction zone of Indian and Eurasian plates and is influenced by many tectonic movements.With very complex geological environment and tectonic background,it is one of the seismically and volcanically active areas.In this paper,the teleseismic records are selected using the method of Maximum Entropy Deconvolution from 5 broadband temporary digital seismic stations within 1.0°×0.8° in Tengchong Area.Five stacking receiver functions are then extracted and the S-wave velocity structures under the 5 stations ranging from 0 to 100 kilometers are inversed by these receiver functions.It turns out that: 1) the geological structures in Tengchong Area show obvious lateral heterogeneity;2) the crustal thickness at the two sides of the Yingjiang Fault changes greatly;3) the area between Tengchong County and Gaoligong Mountain is a high gradient zone of crustal thickness and S-wave velocity;4) there is a low velocity zone located to the southeast of Yingjiang fault and to the west of the Newly-Generated Rupture Zone;5) the Yingjiang Fault and the Newly-Generated Rupture Zone can prevent the melt in volcanic area.
Tengchong Area is located at the boundary of collision and subduction zone of Indian and Eurasian plates and is influenced by many tectonic movements.With very complex geological environment and tectonic background,it is one of the seismically and volcanically active areas.In this paper,the teleseismic records are selected using the method of Maximum Entropy Deconvolution from 5 broadband temporary digital seismic stations within 1.0°×0.8° in Tengchong Area.Five stacking receiver functions are then extracted and the S-wave velocity structures under the 5 stations ranging from 0 to 100 kilometers are inversed by these receiver functions.It turns out that: 1) the geological structures in Tengchong Area show obvious lateral heterogeneity;2) the crustal thickness at the two sides of the Yingjiang Fault changes greatly;3) the area between Tengchong County and Gaoligong Mountain is a high gradient zone of crustal thickness and S-wave velocity;4) there is a low velocity zone located to the southeast of Yingjiang fault and to the west of the Newly-Generated Rupture Zone;5) the Yingjiang Fault and the Newly-Generated Rupture Zone can prevent the melt in volcanic area.
引文
[1]向宏发,虢顺民,徐锡伟,张晚霞,董兴权.川滇南部地区活动地块划分与现今运动特征初析[J].地震地质,2000,22(3):253-264.Xiang H F,Guo S M,Xu X W,Zhang W X,Dong X Q.Active Block Division and Present-day Motion Features of theSouth Region of Sichuan-Yunnan Province[J].Seismology andGeology,2000,22(3):253-264.
[2]孙洁,徐常芳,江钊,史书林,王继军,何明.滇西地区地壳上地幔电性结构与地壳构造活动的关系[J].地震地质,1989,11(1):35-45.Sun J,Xu C F,Jiang Z,Shi S L,Wang J J,He M.TheElectrical Structure of the Crust and Upper Mantle in the WestPart of Yunnan Province and Its Relation to Crustal Tectonics[J].Seismology And Geology,1989,11(1):35-45.
[3]虢顺民,向宏发,周瑞琦,徐锡玮,董兴权,张晚霞.滇西南龙陵—澜沧断裂带:大陆地壳上一条新生的破裂带[J].科学通报,1999,44(19):2118-2121.Guo S M,Xiang H F,Zhou R Q,Xu X W,Dong X Q,ZhangW X.Longling-Lancang Fault Zone in Southwest Yunnan,China:a Newly-Generated Rupture Zone in Continental Crust[J].Chinese Science Bulletin,1999,44(19):2118-2121.
[4]张学民.剪切波速度结构研究方法综述[J].地球物理学进展,2005,20(1):135-141.Zhang X M.The General Statement on Shear Wave VelocityStructure Research Methods[J].Progress in Geophysics,2005,20(1):135-141.
[5]许卫卫,郑天愉.接收函数方法及研究进展.地球物理学进展[J].2002,17(4):605-613.Xu W W,Zheng T Y.The Receiver Function Method and ItsProgress[J].Progress in Geophysics,2002,17(4):605-613.
[6]贺传松,王椿镛,吴庆举.接收函数方法及其新的进展[J].地球物理学进展,2003,18(2):224-228.He C S,Wang C Y,Wu Q J.The Receiver Function Methodand Its New Progress[J].Progress in Geophysics,2003,18(2):224-228.
[7]王小平,宋秀青,秦浩文.接收函数方法应用的现状及其发展[J].地球物理学进展,2005,20(2):545-549.Wang X P,Song X Q,Qin H W.The Development and Statusof the Receiver Function Application[J].Progress inGeophysics,2005,20(2):545-549.
[8]Langston C A.Structure under Mount Rainier,Washington,Inferred from Teleseismic Body Waves[J].Journal ofGeophysical Research,1979,84(B9):4749-4762.
[9]Owens T J,Zandt G,Taylor S R.Seismic Evidence for anAncient Rift beneath the Cumberland Plateau,Tenessee:ADetailed Analysis of Broadband Teleseismic P Waveforms[J].Journal of Geophysical Research,1984,89(B9):7783-7795.
[10]Randall G E.Efficient Calculation of Differential seismograms forLithospheric Receiver Functions[J].Journal of GeophysicalResearch,1989,99(3):469-481.
[11]Ammon C J,Randall G E,Zandt G.On the Nonuniquenessof Receiver Function Inversions[J].Journal of GeophysicalResearch,1990,95(B10):303-308.
[12]Kind R,Kosarev G L,Petersen N V.Receiver Functions atthe Stations of the German Regional Seismic Network[J].Geophysical Journal International,1995,121:191-202.
[13]刘启元,RAINER KIND,李顺成.中国数字地震台网的接收函数及其非线形反演[J].地球物理学报,1997,40(3):356-368.Liu Q Y,Rainer K,Li S C.M Receiver Functions at theStations of the Chinese Digital Seismic Network(CSDN)andTheir Nonlnear Inversion[J].Chinese J.Geophys.(inChinese),1997,40(3):356-368.
[14]吴庆举,曾融生.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,1998,41(5):669-679.Wu Q J,Zeng R S.The Crustal Structure of Qinghai-XizangPlateau Inferred from Broadband Teleseismic Waveform[J].Chinese J.Geophys.(in Chinese),1998,41(5):669-679.
[15]Cakir O,Erduran M,Cinar H,Y?lmaztürk A.ForwardModeling Receiver Functions For Crustal Structure BeneathStationTbz(Trabzon,Turkey)[J].Geophysical JournalInternational,2000,(140):341-356.
[16]Zhu L P,Kanamori H.Moho Depth Variation in SouthernCalifornia from Teleseismic Receiver Functions[J].Journalof Geophysical Research,2000,105(B2):2969-2980.
[17]吴建平,明跃红,王椿镛.云南数字地震台站下方的S波速度结构研究[J].地球物理学报,2001,44(2):228-237.Wu J P,Ming Y H,Wang C Y.The S-wave VelocityStructure Beneath Digital Seismic Stations of YunnanProvince Inferred from Teleseismic Receiver FunctionModeling[J].Chinese J.Geophys.(in Chinese),2001,44(2):228-237.
[18]吴庆举,田小波,张乃铃,李卫平,曾融生.计算台站接收函数的最大熵谱反褶积方法[J].地震学报,2003,25(4):382-389.Wu Q J,Tian X B,Zhang N L,Li W P,Zeng R S.ReceiverFunction Estimated by Maximum Entropy Deconvolution[J].Acta Seismologica Sinica,2003,25(4):382-389.
[19]贺传松,王椿镛,吴建平.腾冲火山区S波速度结构接收函数反演[J].地震学报,2004,26(1):11-18.He C S,Wang C Y,Wu J P.S-wave Velocity StructureInferred from Receiver Function Inversion in TengchongVolcanic Area[J].Acta Seismologica Sinica,2004,26(1):11-18.
[20]贺传松,王椿镛,吴建平.用远震接收函数研究滇西地区的深部结构[J].地震学报,2004,26(3):238-246.He C S,Wang C Y,Wu J P.A Study on Deep StructureUsing Teleseismic Receiver Function in Western Yunnan[J].Acta Seismologica Sinica,2004,26(3):238-246.
[21]王小平,朱元清,于海英.用远震接收函数反演上海及其邻区地壳速度结构[J].地震研究,2006,29(3):239-244.Wang X P,Zhu Y Q,Yu H Y.Crust Velocity Structure inShanghai and Its Neighboring Area Inversed by TeleseismicReceiver Function[J].Journal of Seismological Research,2006,29(3):239-244.
[22]安张辉,吴庆举,周民都.用接收函数反演甘肃测震台网下方的S波速度结构[J].西北地震学报,2006,28(3):263-267.An Z H,Wu Q J,Zhou M D.The S-Wave VelocityStructure under Gansu Seismic Network Inversed by ReceiverFunction[J].Northwestern Seismological Journal,2006,28(3):263-267.
[23]阚荣举,林忠祥.云南地壳上地幔构造的初步研究[J].中国地震,1986,(4):50-61.Kan R J,Lin Z X.Preliminary Research on the Crust andUpper Mantle Structure in Yunnan,China[J].EarthquakeResearch in China,1986,(4):50-61.
[24]王椿镛,皇甫岗,万登堡,刘祖荫,秦嘉政,楼海,吴建平.腾冲火山区地壳结构的人工地震探测[J].地震研究,2000,23(2):148-156.Wang C Y,Huangfu G,Wan D B,Liu Z Y,Qing J Z,LouH,Wu J P.Deep Seismic Sounding of Crustal Structure inTengchong Vocanic Area[J].Journal Of SeismologicalResearch,2000,23(2):148-156.
[25]周真恒,向才英,杨昆杰.云南地壳和上地幔的岩石学结构[J].地震地质,2001,23(1):69-78.Zhou Z H,Xiang C Y,Yang K J.Petrological Structure ofthe Crust and Upper Mantle in Yunnan,China[J].Seismology and Geology,2001,23(1):69-78.
[26]姜朝松,周真恒,赵慈平.腾冲火山区地壳及上地幔结构特征[J].地震研究,2004,27(增刊).Jiang C S,Zhou Z H,Zhao C P.The StructuralCharacteristics of the Crust and Upper Mantle in the Area ofTengchong Volcano[J].Journal of Seismological Research,2004,27(supplement).
[27]张智,赵兵,张晰,刘财.云南思茅—中甸地震剖面的地壳结构[J].地球物理学报,2006,49(5):1377-1384.Zhang Z,Zhao B,Zhang X,Liu C.Crustal Structurebeneath the Wide-Angle Seismic Profile between Simao andZhongdian in Yunnan[J].Chinese J.Geophys.(inChinese),2006,49(5):1377-1384.
[2]孙洁,徐常芳,江钊,史书林,王继军,何明.滇西地区地壳上地幔电性结构与地壳构造活动的关系[J].地震地质,1989,11(1):35-45.Sun J,Xu C F,Jiang Z,Shi S L,Wang J J,He M.TheElectrical Structure of the Crust and Upper Mantle in the WestPart of Yunnan Province and Its Relation to Crustal Tectonics[J].Seismology And Geology,1989,11(1):35-45.
[3]虢顺民,向宏发,周瑞琦,徐锡玮,董兴权,张晚霞.滇西南龙陵—澜沧断裂带:大陆地壳上一条新生的破裂带[J].科学通报,1999,44(19):2118-2121.Guo S M,Xiang H F,Zhou R Q,Xu X W,Dong X Q,ZhangW X.Longling-Lancang Fault Zone in Southwest Yunnan,China:a Newly-Generated Rupture Zone in Continental Crust[J].Chinese Science Bulletin,1999,44(19):2118-2121.
[4]张学民.剪切波速度结构研究方法综述[J].地球物理学进展,2005,20(1):135-141.Zhang X M.The General Statement on Shear Wave VelocityStructure Research Methods[J].Progress in Geophysics,2005,20(1):135-141.
[5]许卫卫,郑天愉.接收函数方法及研究进展.地球物理学进展[J].2002,17(4):605-613.Xu W W,Zheng T Y.The Receiver Function Method and ItsProgress[J].Progress in Geophysics,2002,17(4):605-613.
[6]贺传松,王椿镛,吴庆举.接收函数方法及其新的进展[J].地球物理学进展,2003,18(2):224-228.He C S,Wang C Y,Wu Q J.The Receiver Function Methodand Its New Progress[J].Progress in Geophysics,2003,18(2):224-228.
[7]王小平,宋秀青,秦浩文.接收函数方法应用的现状及其发展[J].地球物理学进展,2005,20(2):545-549.Wang X P,Song X Q,Qin H W.The Development and Statusof the Receiver Function Application[J].Progress inGeophysics,2005,20(2):545-549.
[8]Langston C A.Structure under Mount Rainier,Washington,Inferred from Teleseismic Body Waves[J].Journal ofGeophysical Research,1979,84(B9):4749-4762.
[9]Owens T J,Zandt G,Taylor S R.Seismic Evidence for anAncient Rift beneath the Cumberland Plateau,Tenessee:ADetailed Analysis of Broadband Teleseismic P Waveforms[J].Journal of Geophysical Research,1984,89(B9):7783-7795.
[10]Randall G E.Efficient Calculation of Differential seismograms forLithospheric Receiver Functions[J].Journal of GeophysicalResearch,1989,99(3):469-481.
[11]Ammon C J,Randall G E,Zandt G.On the Nonuniquenessof Receiver Function Inversions[J].Journal of GeophysicalResearch,1990,95(B10):303-308.
[12]Kind R,Kosarev G L,Petersen N V.Receiver Functions atthe Stations of the German Regional Seismic Network[J].Geophysical Journal International,1995,121:191-202.
[13]刘启元,RAINER KIND,李顺成.中国数字地震台网的接收函数及其非线形反演[J].地球物理学报,1997,40(3):356-368.Liu Q Y,Rainer K,Li S C.M Receiver Functions at theStations of the Chinese Digital Seismic Network(CSDN)andTheir Nonlnear Inversion[J].Chinese J.Geophys.(inChinese),1997,40(3):356-368.
[14]吴庆举,曾融生.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,1998,41(5):669-679.Wu Q J,Zeng R S.The Crustal Structure of Qinghai-XizangPlateau Inferred from Broadband Teleseismic Waveform[J].Chinese J.Geophys.(in Chinese),1998,41(5):669-679.
[15]Cakir O,Erduran M,Cinar H,Y?lmaztürk A.ForwardModeling Receiver Functions For Crustal Structure BeneathStationTbz(Trabzon,Turkey)[J].Geophysical JournalInternational,2000,(140):341-356.
[16]Zhu L P,Kanamori H.Moho Depth Variation in SouthernCalifornia from Teleseismic Receiver Functions[J].Journalof Geophysical Research,2000,105(B2):2969-2980.
[17]吴建平,明跃红,王椿镛.云南数字地震台站下方的S波速度结构研究[J].地球物理学报,2001,44(2):228-237.Wu J P,Ming Y H,Wang C Y.The S-wave VelocityStructure Beneath Digital Seismic Stations of YunnanProvince Inferred from Teleseismic Receiver FunctionModeling[J].Chinese J.Geophys.(in Chinese),2001,44(2):228-237.
[18]吴庆举,田小波,张乃铃,李卫平,曾融生.计算台站接收函数的最大熵谱反褶积方法[J].地震学报,2003,25(4):382-389.Wu Q J,Tian X B,Zhang N L,Li W P,Zeng R S.ReceiverFunction Estimated by Maximum Entropy Deconvolution[J].Acta Seismologica Sinica,2003,25(4):382-389.
[19]贺传松,王椿镛,吴建平.腾冲火山区S波速度结构接收函数反演[J].地震学报,2004,26(1):11-18.He C S,Wang C Y,Wu J P.S-wave Velocity StructureInferred from Receiver Function Inversion in TengchongVolcanic Area[J].Acta Seismologica Sinica,2004,26(1):11-18.
[20]贺传松,王椿镛,吴建平.用远震接收函数研究滇西地区的深部结构[J].地震学报,2004,26(3):238-246.He C S,Wang C Y,Wu J P.A Study on Deep StructureUsing Teleseismic Receiver Function in Western Yunnan[J].Acta Seismologica Sinica,2004,26(3):238-246.
[21]王小平,朱元清,于海英.用远震接收函数反演上海及其邻区地壳速度结构[J].地震研究,2006,29(3):239-244.Wang X P,Zhu Y Q,Yu H Y.Crust Velocity Structure inShanghai and Its Neighboring Area Inversed by TeleseismicReceiver Function[J].Journal of Seismological Research,2006,29(3):239-244.
[22]安张辉,吴庆举,周民都.用接收函数反演甘肃测震台网下方的S波速度结构[J].西北地震学报,2006,28(3):263-267.An Z H,Wu Q J,Zhou M D.The S-Wave VelocityStructure under Gansu Seismic Network Inversed by ReceiverFunction[J].Northwestern Seismological Journal,2006,28(3):263-267.
[23]阚荣举,林忠祥.云南地壳上地幔构造的初步研究[J].中国地震,1986,(4):50-61.Kan R J,Lin Z X.Preliminary Research on the Crust andUpper Mantle Structure in Yunnan,China[J].EarthquakeResearch in China,1986,(4):50-61.
[24]王椿镛,皇甫岗,万登堡,刘祖荫,秦嘉政,楼海,吴建平.腾冲火山区地壳结构的人工地震探测[J].地震研究,2000,23(2):148-156.Wang C Y,Huangfu G,Wan D B,Liu Z Y,Qing J Z,LouH,Wu J P.Deep Seismic Sounding of Crustal Structure inTengchong Vocanic Area[J].Journal Of SeismologicalResearch,2000,23(2):148-156.
[25]周真恒,向才英,杨昆杰.云南地壳和上地幔的岩石学结构[J].地震地质,2001,23(1):69-78.Zhou Z H,Xiang C Y,Yang K J.Petrological Structure ofthe Crust and Upper Mantle in Yunnan,China[J].Seismology and Geology,2001,23(1):69-78.
[26]姜朝松,周真恒,赵慈平.腾冲火山区地壳及上地幔结构特征[J].地震研究,2004,27(增刊).Jiang C S,Zhou Z H,Zhao C P.The StructuralCharacteristics of the Crust and Upper Mantle in the Area ofTengchong Volcano[J].Journal of Seismological Research,2004,27(supplement).
[27]张智,赵兵,张晰,刘财.云南思茅—中甸地震剖面的地壳结构[J].地球物理学报,2006,49(5):1377-1384.Zhang Z,Zhao B,Zhang X,Liu C.Crustal Structurebeneath the Wide-Angle Seismic Profile between Simao andZhongdian in Yunnan[J].Chinese J.Geophys.(inChinese),2006,49(5):1377-1384.
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