夏威夷瓦胡岛地区接收函数特征分析
|
摘要
研究壳幔间断面转换波信息的接收函数方法是一种非常有效的地球物理探测技术。我们采用P波接收函数方法对夏威夷瓦胡岛地区布设的一个宽频带地震台站所采集到的数据进行了处理,得到该台站下方接收函数径向分量和切向分量的特征,并对所得到的径向接收函数进行时深转换处理,得到该地区410 km间断面的深度信息。结果表明:该台站的西北方和西南方存在明显的横向非均匀介质,且该地区410 km间断面的深度变浅,大约为390 km,反映了瓦胡岛下方存在热的地幔熔融物质。
Receiver function method,which is often used to obtain the information from the subsurface in the crust and mantle of the Earth,is a very useful geophysical prospecting tool.Data from one station KIP deployed in Hawaii area were processed by using the P-wave receiver function technique.We analyzed the characteristics of radial and tangential receiver functions,and committed the time-depth conversion for the radial receiver function to obtain the information from 410 km discontinuity.Results show that there is obvious laterally heterogeneity in southwest and northwest of station KIP,and the 410 km discontinuity becomes shallower with the depth of about 390 km which may be the response of a hot melt matter beneath the KIP station.
Receiver function method,which is often used to obtain the information from the subsurface in the crust and mantle of the Earth,is a very useful geophysical prospecting tool.Data from one station KIP deployed in Hawaii area were processed by using the P-wave receiver function technique.We analyzed the characteristics of radial and tangential receiver functions,and committed the time-depth conversion for the radial receiver function to obtain the information from 410 km discontinuity.Results show that there is obvious laterally heterogeneity in southwest and northwest of station KIP,and the 410 km discontinuity becomes shallower with the depth of about 390 km which may be the response of a hot melt matter beneath the KIP station.
引文
[1]Owens T J,Zandt G,Taylor S R.Seismic evidence for anancient rift beneath the cumber-land Plateau Tennessee:A de-tailed analysis of broadband teleseismic P waveforms[J].Jour-nal of Geophysical Research,1984,89(B9):7783-7795.
[2]Ducker K G,Sheehan A F.Mantle discontinuity structure be-neath the Colorado Rocky Mountains and High Plains[J].Jour-nal of Geophysical Research,1998,103(B4):7153-7169.
[3]Reading A,Kennett B,Sambridge M.Improved inversion forseismic structure usingtransformed S-wave vector receiver func-tions:Removing the effect of the free surface[J].GeophysicalResearch Letters,2003,30,doi:10.1029/2003GL018090.
[4]Ai Y S,Zheng T Y,Xu W W,et al.A complex 660 km discon-tinuity beneath northeast China[J].Earth and Planetary ScienceLetters,2003,212(1):63-71.
[5]Wu Q J,Li Y H,Zhang R Q,et al.Receiver functions from au-toregressive deconvolution[J].Pure and Applied Geophysics,2007,164(11):2175-2192.
[6]Shen X Z,Mei X P,Zhang Y S.The crustal and upper-mantlestructure beneath the Northeast margin of Tibet[J].Bulletin ofthe Seismological Society of America,2011,101(6):2782-2795.
[7]徐震,徐鸣洁,王良书,等.用接收函数Ps转化波研究地壳各向异性——以哀牢山-红河断裂带为例[J].地球物理学报,2006,49(2):438-448.
[8]田宝峰.利用接收函数方位变化研究地壳各向异性[D].北京:中国科学院研究生院,2008.
[9]Levin V,Park J.Crustal anisotropy beneath the Ural mountainsforedeep from teleseismic receiver functions[J].GeophysicalResearch Letters,1997,24(11):1283-1286.
[10]Savage M K.Lower crustalanisotropy or dipping boundaries:effects on receiver functions and a case study in New Zealand[J].Journal of Geophysical Research,1998,103(B7):15069-15087.
[11]Tilmann F J,Benz H M,Priestley K F,et al.P-wave velocitystructure of the uppermost mantle beneath Hawaii from travel timetomography[J].Geophysical Journal International,2001,146(3):594-606.
[12]Wolfe C J,Solomon S C,Silver P G,et al.Inversion of bodywave delay times for mantle structure beneath the HawaiianIslands:results from the PELENET experiment[J].Earth andPlanetary Science Letters,2002,198(1/2):129-145.
[13]Woods M T,Okal E A.Rayleigh wave dispersion along the Ha-waiian Swell:a test of lithospheric thinning by thermal rejuve-nation at a hotspot[J].Geophysical Journal International,1996,125(2):325-339.
[14]Walker K T,Bokelmann G H R,Klemperer S L.Shear-wavesplitting to test mantle deformation models around Hawaii[J].Geophysical Research Letters,2001,28(22):4319-4322.
[15]Walker K T,Bokelmann G H R,Klemperer S L.Reply to“Shear-wave splitting to test mantle deformation models aroundHawaii”by Vinnik et al[J].Geophysical Research Letters,2002,30(13):1676-1677.
[16]Li X Q,Kind R,Priestley K,et al.Mapping the Hawaiianplume conduit with converted seismic waves[J].Nature,2000,405:938-941.
[17]Li X Q,Kind R,Yuan X H,et al.Rejuvenation of the litho-sphere by the Hawaiian plume[J].Nature,2004,427:827-829.
[18]Duncan R A,Keller R A.Radiometric ages for basement rocksfrom the Emperor Seamounts,ODP Leg 197[J].GeochemistryGeophysics and Geosystems,2004,5,doi:10.1029/2004GC000704.
[19]Crough S T.Thermal origin of mid-plate hot-spot swells[J].Geo-physical Journal of the Royal Astronomical Society,1978,55(2):451-469.
[20]Dietz R S,Menard H W.Hawaiian swell,deep,and arch,andsubsidence of the Hawaiian Islands[J].Journal of Geology,1953,61(2):99-113.
[21]Wessel P.Observational constraints on models of the Hawaiianhot spot swell[J].Journal of Geophysical Research,1993,98:16095-16104.
[22]Tim Aherm.Data Holdings By Station Query Help[EB/OL].http://www.iris.edu/SeismiQuery/by_station.
[23]Langston C A.Structure under Mount Rainier,Washington,in-ferred from teleseismic body waves[J].Journal of GeophysicalResearch,1979,84(B9):4749-4762.
[24]Burdick L J,Helmberger D V.Time functions appropriate fordeep earthquakes[J].Bulletin of Seismological Society of Amer-ica,1974,64(5):1419-1428.
[25]Helmberger D V,Wiggins R.Upper mantle structure of the Mid-western United States[J].Journal of Geophysical Research,1971,76(14):3229-3245.
[26]Owens T J,Crosson R S.Shallow structure effects on broadbandteleseismic P waveforms[J].Bulletin of Seismological Society ofAmerica,1988,78(1):96-108.
[27]Kennett B L N,Engdahl E R.Traveltimes for global earthquakelocation and phase identification[J].Geophysical Journal Inter-national,1991,105(2):429-465.
[28]Yuan X H,Ni J,Kind R,et al.Lithospheric and upper mantlestructure of southern Tibet from a seismological passive source ex-periment[J].Journal of Geophysical Research,1997,102(B12):27491-27550.
[29]Wessel P,Smith W H.New,improved version of the genericmapping tools released[J].Eos Transactions AGU,1998,79(47):579.
[30]Goldstein P,Snoke A.SAC Availability for the IRIS Community[J/OL].http://www.iris.edu/news/news letter/vol7nol/pagel.htm.
[31]Goldstein P,Dodge D,Firpo M,et al.SAC2000:Signal pro-cessing and analysis tools for seismologists and engineers[M]//Lee W H K,Kanamori H,Jennings P C,et al.TheIASPEI International Handbook of Earthquake and EngineeringSeismology.London:Academic Press,2003.
[2]Ducker K G,Sheehan A F.Mantle discontinuity structure be-neath the Colorado Rocky Mountains and High Plains[J].Jour-nal of Geophysical Research,1998,103(B4):7153-7169.
[3]Reading A,Kennett B,Sambridge M.Improved inversion forseismic structure usingtransformed S-wave vector receiver func-tions:Removing the effect of the free surface[J].GeophysicalResearch Letters,2003,30,doi:10.1029/2003GL018090.
[4]Ai Y S,Zheng T Y,Xu W W,et al.A complex 660 km discon-tinuity beneath northeast China[J].Earth and Planetary ScienceLetters,2003,212(1):63-71.
[5]Wu Q J,Li Y H,Zhang R Q,et al.Receiver functions from au-toregressive deconvolution[J].Pure and Applied Geophysics,2007,164(11):2175-2192.
[6]Shen X Z,Mei X P,Zhang Y S.The crustal and upper-mantlestructure beneath the Northeast margin of Tibet[J].Bulletin ofthe Seismological Society of America,2011,101(6):2782-2795.
[7]徐震,徐鸣洁,王良书,等.用接收函数Ps转化波研究地壳各向异性——以哀牢山-红河断裂带为例[J].地球物理学报,2006,49(2):438-448.
[8]田宝峰.利用接收函数方位变化研究地壳各向异性[D].北京:中国科学院研究生院,2008.
[9]Levin V,Park J.Crustal anisotropy beneath the Ural mountainsforedeep from teleseismic receiver functions[J].GeophysicalResearch Letters,1997,24(11):1283-1286.
[10]Savage M K.Lower crustalanisotropy or dipping boundaries:effects on receiver functions and a case study in New Zealand[J].Journal of Geophysical Research,1998,103(B7):15069-15087.
[11]Tilmann F J,Benz H M,Priestley K F,et al.P-wave velocitystructure of the uppermost mantle beneath Hawaii from travel timetomography[J].Geophysical Journal International,2001,146(3):594-606.
[12]Wolfe C J,Solomon S C,Silver P G,et al.Inversion of bodywave delay times for mantle structure beneath the HawaiianIslands:results from the PELENET experiment[J].Earth andPlanetary Science Letters,2002,198(1/2):129-145.
[13]Woods M T,Okal E A.Rayleigh wave dispersion along the Ha-waiian Swell:a test of lithospheric thinning by thermal rejuve-nation at a hotspot[J].Geophysical Journal International,1996,125(2):325-339.
[14]Walker K T,Bokelmann G H R,Klemperer S L.Shear-wavesplitting to test mantle deformation models around Hawaii[J].Geophysical Research Letters,2001,28(22):4319-4322.
[15]Walker K T,Bokelmann G H R,Klemperer S L.Reply to“Shear-wave splitting to test mantle deformation models aroundHawaii”by Vinnik et al[J].Geophysical Research Letters,2002,30(13):1676-1677.
[16]Li X Q,Kind R,Priestley K,et al.Mapping the Hawaiianplume conduit with converted seismic waves[J].Nature,2000,405:938-941.
[17]Li X Q,Kind R,Yuan X H,et al.Rejuvenation of the litho-sphere by the Hawaiian plume[J].Nature,2004,427:827-829.
[18]Duncan R A,Keller R A.Radiometric ages for basement rocksfrom the Emperor Seamounts,ODP Leg 197[J].GeochemistryGeophysics and Geosystems,2004,5,doi:10.1029/2004GC000704.
[19]Crough S T.Thermal origin of mid-plate hot-spot swells[J].Geo-physical Journal of the Royal Astronomical Society,1978,55(2):451-469.
[20]Dietz R S,Menard H W.Hawaiian swell,deep,and arch,andsubsidence of the Hawaiian Islands[J].Journal of Geology,1953,61(2):99-113.
[21]Wessel P.Observational constraints on models of the Hawaiianhot spot swell[J].Journal of Geophysical Research,1993,98:16095-16104.
[22]Tim Aherm.Data Holdings By Station Query Help[EB/OL].http://www.iris.edu/SeismiQuery/by_station.
[23]Langston C A.Structure under Mount Rainier,Washington,in-ferred from teleseismic body waves[J].Journal of GeophysicalResearch,1979,84(B9):4749-4762.
[24]Burdick L J,Helmberger D V.Time functions appropriate fordeep earthquakes[J].Bulletin of Seismological Society of Amer-ica,1974,64(5):1419-1428.
[25]Helmberger D V,Wiggins R.Upper mantle structure of the Mid-western United States[J].Journal of Geophysical Research,1971,76(14):3229-3245.
[26]Owens T J,Crosson R S.Shallow structure effects on broadbandteleseismic P waveforms[J].Bulletin of Seismological Society ofAmerica,1988,78(1):96-108.
[27]Kennett B L N,Engdahl E R.Traveltimes for global earthquakelocation and phase identification[J].Geophysical Journal Inter-national,1991,105(2):429-465.
[28]Yuan X H,Ni J,Kind R,et al.Lithospheric and upper mantlestructure of southern Tibet from a seismological passive source ex-periment[J].Journal of Geophysical Research,1997,102(B12):27491-27550.
[29]Wessel P,Smith W H.New,improved version of the genericmapping tools released[J].Eos Transactions AGU,1998,79(47):579.
[30]Goldstein P,Snoke A.SAC Availability for the IRIS Community[J/OL].http://www.iris.edu/news/news letter/vol7nol/pagel.htm.
[31]Goldstein P,Dodge D,Firpo M,et al.SAC2000:Signal pro-cessing and analysis tools for seismologists and engineers[M]//Lee W H K,Kanamori H,Jennings P C,et al.TheIASPEI International Handbook of Earthquake and EngineeringSeismology.London:Academic Press,2003.
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