利用S波高频衰减参数对云南地区地壳Q值成像
|
摘要
根据35个数字地震台站记录的云南地区1 999～2007年6429个近震的波形资料,采用遗传算法对S波位移谱的高频衰减进行拟合,得到19009条衰减算子t~*数据.根据这些衰减算子t~*数据,反演得到云南地区地壳Q值分布.结果表明,云南地区的地壳Q值分布存在显著的横向不均匀性,即红河断裂北侧地壳Q值整体偏低,而红河断裂南侧地壳Q值整体较高.云南地区1900年以来6级以上强震基本上位于低Q值区域,这可能由于强烈构造活动导致地壳产生大量裂隙,且裂隙中充满流体,从而表现为低Q值;但呈北西向的龙陵澜沧—耿马孟连一带的强震却位于高Q值区,这可能与该地区正发育一条新的构造带有关.此外,云南地区的高大地热流点(>80 mW/m~2)基本上位于低Q值区域,热流值与衰减值成负对应关系.
Based on the waveform data of 6429 local earthquakes recorded on 35 stations of Yunnan during the period from 1999 to 2007,a data set of 19009 attenuation factor t~* is obtained by fitting the high-frequency attenuation of S wave spectra with genetic algorithm.The spatial distribution of Q is determined by inverting the data of t~* with seismic tomography.The results show that there is a significant lateral heterogeneity in Q distribution in Yunnan,namely,the Q on the north side of Red River fault is low and is high on the other side.The M≥6.0 earthquakes are basically located in low-Q region since 1900,which may be due to strong tectonic activity leading to a large number of fluid-filled pores.However,the strong earthquakes in NW-trending Longlin-Lancang-Gengma region are located in high-Q region,which may be explained by the development of a new fault in the region.High heat flow sites (> 80 mW/m~2) in this region are located in low-Q areas,indicating a negative correlation.
Based on the waveform data of 6429 local earthquakes recorded on 35 stations of Yunnan during the period from 1999 to 2007,a data set of 19009 attenuation factor t~* is obtained by fitting the high-frequency attenuation of S wave spectra with genetic algorithm.The spatial distribution of Q is determined by inverting the data of t~* with seismic tomography.The results show that there is a significant lateral heterogeneity in Q distribution in Yunnan,namely,the Q on the north side of Red River fault is low and is high on the other side.The M≥6.0 earthquakes are basically located in low-Q region since 1900,which may be due to strong tectonic activity leading to a large number of fluid-filled pores.However,the strong earthquakes in NW-trending Longlin-Lancang-Gengma region are located in high-Q region,which may be explained by the development of a new fault in the region.High heat flow sites (> 80 mW/m~2) in this region are located in low-Q areas,indicating a negative correlation.
引文
[1] Anderson D L,Ben-Menabem A,Archambeau C B.Attenuation of seismic energy in up mantle.J.Geophys.Res.,1965,70:1441-1448
[2] Canas J A,Mitchell B J.Lateral variation of surface-wave anelastic attenuation across the Pacific.Bull.Seism.Soc.Am.,1978,68:1637-1650
[3] Dziewonski A M,Steim J.Dispersion and attenuation of mantle waves from waveform inversion.Geophys.J.R.Astr.Soc.,1982,70:503-527
[4] Dogan S,Mitchell B J.Attenuation of surface waves across the Arabian Peninsula.Tectonophysics,1990,204:137-160
[5] Mitchell B J.An elastic structure and evolution of the continental crust and upper mantle from seismic surface wave attenuation.Reviews of Geophysics,1995,33(4) :441-462
[6] Hwang H J,Mitchell B J.Interstation surface wave analysis by frequency domain Wiener deconvolution and modal isolation.Bull.Seism.Soc.Am.,1986,76:847-864
[7] Haydar J,Al-Shukri,Mitchell B J.Three dimensional attenuation structure in and around the new Madrid seismic zone.Bull.Seism.Soc.Am.,1990,80:615-632
[8] Martine B,Montagner J.Tomographic study of upper mantle attenuation in the Pacific ocean.Geophysical Research Letter,1993,20:663-666
[9] Rachel E.Crustal attenuation and site effects at Parkfied,California.Journal of Geophysical Research,2000,105:6277-6286
[10] 洪学海,朱介寿,曹家敏等.中国大陆地壳上地幔S波品质因子三维层析成像.地球物理学报,2003,46(5) :642～651 Hong X H,Zhu J S,Cao J M,et al.Tomography of 3-D S-wave quality factor of the crust and upper mantle in China.Chinese J.Geophys.(in Chinese),2003,46(5) :642-651
[11] 刘建华,胥颐,郝天珧.地震波衰减的物理机制研究.地球物理学进展,2004,19(1) :1～7 Liu J H,Xu Y,Hao T Y.Study on physical mechanism of the seismic wave attenuation.Progress in Geophysics (in Chinese),2004,19(1) :1-7
[12] Anderson D L,Archambeau C B.The anelasticity of the earth.J.Geophs.Res.,1964,69:2071-2084
[13] Sato Y.Attenuation,dispersion,and the wave guide of the G wave.Bull.Seism.Soc.Am.,1958,48:231-251
[14] Solomon S C.Seismic wave attenuation and partial melting in the upper mantle of North America.J.Geophys.Res.,1972,77:1483-1502
[15] Tsai Y B,Aki K.Simultaneous determination of the seismic moment and attenuation of seismic surface waves.Bull.Seism.Soc.Am.,1969,1393-1405
[16] Aki K.Analysis of the seismic coda of local earthquake as scattered waves.J.Geophs.Res.,1969,74(2) :615-631
[17] Herrmann R B.Q estimates using the coda of local earthquakes.Bull.Seism.Soc.Am.,1980,70(2) :447-468
[18] Xie J,Nuttli O W.Interpretation of high-frequency coda at large distances:stochastic modeling and method of inversion.Geophysics,1988,95(2) :579-595
[19] Xie J,Mitchell B J.A back projection method for imaging large-scale lateral variation of Lg coda Q with application to continental Africa.Geophys.J.Ira.,1990,100(1) :161-181
[20] Mitchell B J,Yu Pan,Jiang Xie,et al.Lg coda Q variation across Eurasia and its relation to custal evolution.J.Geophy.Res.,1997,102(b10) :22767-22779
[21] 刘建华,刘福田,王凤霞等.单台Lg尾波Q_(Lg)~C的测量研究.地球物理学报,1999,42(3) :371～382 Liu J H,Liu F T,Wang F X,et al.A measuring study single-trace Lg code Q_(Lg)~C.Chinese J.Geophys.(in Chinese),1999,42(3) :371-382
[22] 刘建华,刘福田,阎晓蔚等.华北地区Lg尾波衰减研究--Lg尾波Q的测量.地球物理学报,2004,47(5) :822～831 Liu J H,Liu F T,Yan X W,et al.A study of I coda attenuation in North China:the measurement of Lg coda Q.Chinese J.Geophys.(in Chinese),2004,47(5) :822-831
[23] 刘建华,刘福田,阎晓蔚等.华北地区Lg尾波衰减研究--Lg尾波Q_0地震成像.地球物理学报,2004,47(6) :1044～1052 Liu J H,Liu F T,Yan X W0 et al.A study of I coda attenuation beneath north China:seismic imaging of Lg coda Q_0． Chinese J.Geophys.(in Chinese),2004,47 (6) :1044-1052
[24] 丛连理,胡家富,傅竹武等.中国大陆及邻近地区Lg尾波的Q值分布.中国科学(D辑),2002,32(8) :617～624
Cong L L,Hu J F,Fu Z W,et al.Distribution of Lg coda Q in the Chinese continent and its adiacent regions.Science in China (SeriesD) (in Chinese),2002,32(8) :617-624
[25] Pei S P,Zhan J M,Rowe C A,et al.M_L amplitude tomography in North China.Bull.Seismo.Soc.Am., 2006,96(4A):1560-1566
[26] 马宏生,汪素云,裴顺平等.川滇及周边地区地壳横波衰减的成像研究.地球物理学报,2007,50(2) :465～471 Ma H S,Wang S Y,Pei S P,et al.Q0 tomography of S wave attenuation in Sichuan-Yunnan and adjacent regions.Chinese J.Geophys.(in Chinese),2007,50(2) :465-471
[27] 汪素云,裴顺平,许忠淮等.利用M_L振幅研究地壳横波Q值I:不同构造区的衰减特征.地球物理学报,2007,50(6) :1740～1747 Wang S Y,Pei S P,Xu Z H,et al.Crustal S-wave Q estimated from MI.amplitude I:attenuation in diferent tectonic regions of China.Chinese J.Geophys.(in Chinese),2007,50 (6) :1740-1747
[28] 汪素云,裴顺平,Thomas等.利用M_L振幅研究地壳横波Q值Ⅱ:Q横向变化特征.地球物理学报,2008,5l(1) :133～139 Wang S Y,Pei S P,Thomas M H,et al.Crustal S-wave Q estimated from M_L amplitude Ⅱ:Q lateral variation in China.Chinese J.Geophys.(in Chinese),2007,50(6) :1740-1747
[29] Sherbaum F.Combined inversion for the three-dimensional Q structure and source parameters using microearthquake spectra.J.Geophys.Res.,1990,95(B8) :12423-12438
[30] Haberland C,Rietbrock A.Attenuation tomography in the western central Andes:A detailed insight into the structure of a magmatic arc.J.Geophys.Res.,2001,106 (B6) :11151-11167
[31] Brune J N.Tectonic stress and the spectra of seismic shear waves from earthquakes.J.Geophys.Res.,1970,75:4997-5009
[32] Hanks T C,Wyss M.The use of body wave spectra in the determination of seismic source parameters.Bull.Seismol.Soc.Am.,1972,62:561-589
[33] 黄玉龙,郑斯华,刘杰等.广东地区地震动衰减和场地响应的研究.地球物理学报,2003,46(1) :54～61
Huang Y L,Zheng S H,Liu J,et al.Attenuation of ground motion and site response in Guangdong region.Chinese J.Geophys.(in Chinese),2003,46(1) :54-61
[34] 苏有锦,刘杰,郑斯华等.云南地区S波非弹性衰减Q值研究.地震学报,2006,28(2) :206～212 Su Y J,Liu J,Zheng S H,et al.Q value of anelastic S-wave attenuation in Yunnan region.Acta Seismologica Sinica (in Chinese),2006,28(2) :206-212
[35] Atkinson G M,Mereu R F.The shape of ground motion attenuation curves in southeastern Canada.Bull.Seism.Soc.Am.,1992,82(5) :2014-2031
[36] Sanders C O.Local earthquake tomography:attenuation theory and results,in seismic tomography:theory and Practice,edited by H.Iyer and K.Hirahara.New York:Chapman and Hall,1993． 676-694
[37] Corrnier V F.The effect of attenuation on seismic body waves.Bull.Seismol.Soc.Am.,1982,72:169-200
[38] Wittlinger G H,Haessler H,Granet M.Three dimensional inversion of Q_p from low magnitude earthquakes analysis.Ann.Geophys.,1983,6:427-438
[39] Rietbrock A.P wave attenuation structure in the fault area of the 1995 Kobe earthquake.J.Geophys.Res.,2001,106(B3) :4141-4154
[40] Hansen S,Thurber C,Mandernach M,et al.Seismic velocity and attenuation structure of the east rift zone and south Flank of Kilauea volcano,Hawaii.Bull.Seismol.Soc.Am.,2004,94(4) :1430-1440
[41] 刘杰,郑斯华,黄玉龙.利用遗传算法反演非弹性衰减系数、震源参数和场地响应.地震学报,2003,25(2) :211～218 Liu J,Zheng S H,Huang Y L.The inversion of non-elasticity coefficient,source parameters,site response using Genetic algorithms.Acta Seismologica Sinica (in Chinese),2003,25(2) :211-218
[42] 何正勤,叶太兰,苏伟.云南地区地壳中上部横波速度结构研究.地球物理学报,2004,47(5) :838～844 He Z Q,Ye T L,Su W.S-wave velocity structure of the middle and upper crust in the Yunnan region.Chinese J.Geophys.(in Chinese),2004,47(5) :838-844
[43] 虢顺民,向宏发,徐锡伟等.滇西南龙陵-澜沧第四纪新生断裂带特征和形成机制研究.地震地质,2000． 22(3) :277～284 Guo S M,Xiang H F,Xu X W,et al.Characteristics and formation mechanism of the Longling-Lancang newly emerging fault zone in quaternary in the southwest Yunnan.Seismology and Geology(in Chinese),2000,22(3) :277-284
[44] 吴乾蕃,祖金华,谢毅真等.云南地区地热基本特征.地震地质,1988,10(4) :177～183 Wu Q F,Zu J H,Xie Y Z,et al.Characteristics of g.eothermal field in Yunnan region.Seismology and Geology(in Chinese),1988,10(4) :177-183
[45] 汪集旸,黄少鹏.中国大陆地区大地热流数据汇编(第二版).地震地质,1990,12(4) :351～366 Wang J Y,Huang S P.Complilation of heat flow data in the China continental area (2nd edition).Seismology und Geology (in Chinese),1990,12(4) :351-365
[46] 汪缉安,徐青,张文仁.云南大地热流及地热地质问题.地震地质,1990,12(4) :367～377 Wang J A,Xu Q,Zhang W R.Heat flow data and some geologic geothermal problems in Yunnan province.Seismology and Geology (in Chinese),1990,12(4) :367-377
[47] Eberhart-Phillips D, Chadwick M. Three dimensional attenuation model of the shallow Hikuangi subduction zone in the Raukumara Peninsula,New Zealand.J.Geophys.Res.,2002,107:2033,doi:10． 1029/2000JB000046
[2] Canas J A,Mitchell B J.Lateral variation of surface-wave anelastic attenuation across the Pacific.Bull.Seism.Soc.Am.,1978,68:1637-1650
[3] Dziewonski A M,Steim J.Dispersion and attenuation of mantle waves from waveform inversion.Geophys.J.R.Astr.Soc.,1982,70:503-527
[4] Dogan S,Mitchell B J.Attenuation of surface waves across the Arabian Peninsula.Tectonophysics,1990,204:137-160
[5] Mitchell B J.An elastic structure and evolution of the continental crust and upper mantle from seismic surface wave attenuation.Reviews of Geophysics,1995,33(4) :441-462
[6] Hwang H J,Mitchell B J.Interstation surface wave analysis by frequency domain Wiener deconvolution and modal isolation.Bull.Seism.Soc.Am.,1986,76:847-864
[7] Haydar J,Al-Shukri,Mitchell B J.Three dimensional attenuation structure in and around the new Madrid seismic zone.Bull.Seism.Soc.Am.,1990,80:615-632
[8] Martine B,Montagner J.Tomographic study of upper mantle attenuation in the Pacific ocean.Geophysical Research Letter,1993,20:663-666
[9] Rachel E.Crustal attenuation and site effects at Parkfied,California.Journal of Geophysical Research,2000,105:6277-6286
[10] 洪学海,朱介寿,曹家敏等.中国大陆地壳上地幔S波品质因子三维层析成像.地球物理学报,2003,46(5) :642～651 Hong X H,Zhu J S,Cao J M,et al.Tomography of 3-D S-wave quality factor of the crust and upper mantle in China.Chinese J.Geophys.(in Chinese),2003,46(5) :642-651
[11] 刘建华,胥颐,郝天珧.地震波衰减的物理机制研究.地球物理学进展,2004,19(1) :1～7 Liu J H,Xu Y,Hao T Y.Study on physical mechanism of the seismic wave attenuation.Progress in Geophysics (in Chinese),2004,19(1) :1-7
[12] Anderson D L,Archambeau C B.The anelasticity of the earth.J.Geophs.Res.,1964,69:2071-2084
[13] Sato Y.Attenuation,dispersion,and the wave guide of the G wave.Bull.Seism.Soc.Am.,1958,48:231-251
[14] Solomon S C.Seismic wave attenuation and partial melting in the upper mantle of North America.J.Geophys.Res.,1972,77:1483-1502
[15] Tsai Y B,Aki K.Simultaneous determination of the seismic moment and attenuation of seismic surface waves.Bull.Seism.Soc.Am.,1969,1393-1405
[16] Aki K.Analysis of the seismic coda of local earthquake as scattered waves.J.Geophs.Res.,1969,74(2) :615-631
[17] Herrmann R B.Q estimates using the coda of local earthquakes.Bull.Seism.Soc.Am.,1980,70(2) :447-468
[18] Xie J,Nuttli O W.Interpretation of high-frequency coda at large distances:stochastic modeling and method of inversion.Geophysics,1988,95(2) :579-595
[19] Xie J,Mitchell B J.A back projection method for imaging large-scale lateral variation of Lg coda Q with application to continental Africa.Geophys.J.Ira.,1990,100(1) :161-181
[20] Mitchell B J,Yu Pan,Jiang Xie,et al.Lg coda Q variation across Eurasia and its relation to custal evolution.J.Geophy.Res.,1997,102(b10) :22767-22779
[21] 刘建华,刘福田,王凤霞等.单台Lg尾波Q_(Lg)~C的测量研究.地球物理学报,1999,42(3) :371～382 Liu J H,Liu F T,Wang F X,et al.A measuring study single-trace Lg code Q_(Lg)~C.Chinese J.Geophys.(in Chinese),1999,42(3) :371-382
[22] 刘建华,刘福田,阎晓蔚等.华北地区Lg尾波衰减研究--Lg尾波Q的测量.地球物理学报,2004,47(5) :822～831 Liu J H,Liu F T,Yan X W,et al.A study of I coda attenuation in North China:the measurement of Lg coda Q.Chinese J.Geophys.(in Chinese),2004,47(5) :822-831
[23] 刘建华,刘福田,阎晓蔚等.华北地区Lg尾波衰减研究--Lg尾波Q_0地震成像.地球物理学报,2004,47(6) :1044～1052 Liu J H,Liu F T,Yan X W0 et al.A study of I coda attenuation beneath north China:seismic imaging of Lg coda Q_0． Chinese J.Geophys.(in Chinese),2004,47 (6) :1044-1052
[24] 丛连理,胡家富,傅竹武等.中国大陆及邻近地区Lg尾波的Q值分布.中国科学(D辑),2002,32(8) :617～624
Cong L L,Hu J F,Fu Z W,et al.Distribution of Lg coda Q in the Chinese continent and its adiacent regions.Science in China (SeriesD) (in Chinese),2002,32(8) :617-624
[25] Pei S P,Zhan J M,Rowe C A,et al.M_L amplitude tomography in North China.Bull.Seismo.Soc.Am., 2006,96(4A):1560-1566
[26] 马宏生,汪素云,裴顺平等.川滇及周边地区地壳横波衰减的成像研究.地球物理学报,2007,50(2) :465～471 Ma H S,Wang S Y,Pei S P,et al.Q0 tomography of S wave attenuation in Sichuan-Yunnan and adjacent regions.Chinese J.Geophys.(in Chinese),2007,50(2) :465-471
[27] 汪素云,裴顺平,许忠淮等.利用M_L振幅研究地壳横波Q值I:不同构造区的衰减特征.地球物理学报,2007,50(6) :1740～1747 Wang S Y,Pei S P,Xu Z H,et al.Crustal S-wave Q estimated from MI.amplitude I:attenuation in diferent tectonic regions of China.Chinese J.Geophys.(in Chinese),2007,50 (6) :1740-1747
[28] 汪素云,裴顺平,Thomas等.利用M_L振幅研究地壳横波Q值Ⅱ:Q横向变化特征.地球物理学报,2008,5l(1) :133～139 Wang S Y,Pei S P,Thomas M H,et al.Crustal S-wave Q estimated from M_L amplitude Ⅱ:Q lateral variation in China.Chinese J.Geophys.(in Chinese),2007,50(6) :1740-1747
[29] Sherbaum F.Combined inversion for the three-dimensional Q structure and source parameters using microearthquake spectra.J.Geophys.Res.,1990,95(B8) :12423-12438
[30] Haberland C,Rietbrock A.Attenuation tomography in the western central Andes:A detailed insight into the structure of a magmatic arc.J.Geophys.Res.,2001,106 (B6) :11151-11167
[31] Brune J N.Tectonic stress and the spectra of seismic shear waves from earthquakes.J.Geophys.Res.,1970,75:4997-5009
[32] Hanks T C,Wyss M.The use of body wave spectra in the determination of seismic source parameters.Bull.Seismol.Soc.Am.,1972,62:561-589
[33] 黄玉龙,郑斯华,刘杰等.广东地区地震动衰减和场地响应的研究.地球物理学报,2003,46(1) :54～61
Huang Y L,Zheng S H,Liu J,et al.Attenuation of ground motion and site response in Guangdong region.Chinese J.Geophys.(in Chinese),2003,46(1) :54-61
[34] 苏有锦,刘杰,郑斯华等.云南地区S波非弹性衰减Q值研究.地震学报,2006,28(2) :206～212 Su Y J,Liu J,Zheng S H,et al.Q value of anelastic S-wave attenuation in Yunnan region.Acta Seismologica Sinica (in Chinese),2006,28(2) :206-212
[35] Atkinson G M,Mereu R F.The shape of ground motion attenuation curves in southeastern Canada.Bull.Seism.Soc.Am.,1992,82(5) :2014-2031
[36] Sanders C O.Local earthquake tomography:attenuation theory and results,in seismic tomography:theory and Practice,edited by H.Iyer and K.Hirahara.New York:Chapman and Hall,1993． 676-694
[37] Corrnier V F.The effect of attenuation on seismic body waves.Bull.Seismol.Soc.Am.,1982,72:169-200
[38] Wittlinger G H,Haessler H,Granet M.Three dimensional inversion of Q_p from low magnitude earthquakes analysis.Ann.Geophys.,1983,6:427-438
[39] Rietbrock A.P wave attenuation structure in the fault area of the 1995 Kobe earthquake.J.Geophys.Res.,2001,106(B3) :4141-4154
[40] Hansen S,Thurber C,Mandernach M,et al.Seismic velocity and attenuation structure of the east rift zone and south Flank of Kilauea volcano,Hawaii.Bull.Seismol.Soc.Am.,2004,94(4) :1430-1440
[41] 刘杰,郑斯华,黄玉龙.利用遗传算法反演非弹性衰减系数、震源参数和场地响应.地震学报,2003,25(2) :211～218 Liu J,Zheng S H,Huang Y L.The inversion of non-elasticity coefficient,source parameters,site response using Genetic algorithms.Acta Seismologica Sinica (in Chinese),2003,25(2) :211-218
[42] 何正勤,叶太兰,苏伟.云南地区地壳中上部横波速度结构研究.地球物理学报,2004,47(5) :838～844 He Z Q,Ye T L,Su W.S-wave velocity structure of the middle and upper crust in the Yunnan region.Chinese J.Geophys.(in Chinese),2004,47(5) :838-844
[43] 虢顺民,向宏发,徐锡伟等.滇西南龙陵-澜沧第四纪新生断裂带特征和形成机制研究.地震地质,2000． 22(3) :277～284 Guo S M,Xiang H F,Xu X W,et al.Characteristics and formation mechanism of the Longling-Lancang newly emerging fault zone in quaternary in the southwest Yunnan.Seismology and Geology(in Chinese),2000,22(3) :277-284
[44] 吴乾蕃,祖金华,谢毅真等.云南地区地热基本特征.地震地质,1988,10(4) :177～183 Wu Q F,Zu J H,Xie Y Z,et al.Characteristics of g.eothermal field in Yunnan region.Seismology and Geology(in Chinese),1988,10(4) :177-183
[45] 汪集旸,黄少鹏.中国大陆地区大地热流数据汇编(第二版).地震地质,1990,12(4) :351～366 Wang J Y,Huang S P.Complilation of heat flow data in the China continental area (2nd edition).Seismology und Geology (in Chinese),1990,12(4) :351-365
[46] 汪缉安,徐青,张文仁.云南大地热流及地热地质问题.地震地质,1990,12(4) :367～377 Wang J A,Xu Q,Zhang W R.Heat flow data and some geologic geothermal problems in Yunnan province.Seismology and Geology (in Chinese),1990,12(4) :367-377
[47] Eberhart-Phillips D, Chadwick M. Three dimensional attenuation model of the shallow Hikuangi subduction zone in the Raukumara Peninsula,New Zealand.J.Geophys.Res.,2002,107:2033,doi:10． 1029/2000JB000046
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