利用气枪地震资料研究燕山隆起带南部地区地壳S波速度及泊松比结构
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摘要
泊松比是了解地球内部介质的一个重要参数,在地震学上可以通过P波和S波速度的比值来确定.但是传统人工地震测深采用的炸药等爆破源产生的S波较弱,难以用来研究泊松比结构.对2006年河北省遵化市上关湖水库大容量气枪试验产生的地震数据进行研究,发现气枪震源能够有效地产生S波.根据偏振分析,认为S波主要是气枪产生的P波在水库底部固液界面转换产生的.波形拟合能够充分利用波形和走时信息,是研究地下结构的一种有效的方法.对气枪产生的S波进行波形拟合,获得了燕山隆起带南部地区地壳的S波速度模型,并对比修正后的P波速度模型,进一步得到了该地区的泊松比结构.研究表明:1)该地区的地壳厚度约为33km.2)该地区地壳整体泊松比值偏低,上(0~14km)中(14~28km)下(28~33km)地壳以及上地幔顶部(33km附近)的泊松比平均值分别为0.25,0.25,0.27,0.27.上地壳和中地壳可能以长英质的酸性岩石为主,下地壳和上地幔顶部可能以铁镁质的基性岩石和中性岩石为主.3)该地区上下地壳各存在一个低速层,它们可能主要是流体作用的结果.
The Poisson's ratio,an important parameter to understand the interior of the earth,can be determined uniquely from the ratio of P to S seismic wave velocity.But traditional seismic sources used in deep seismic sounding such as dynamite can not generate high energy S waves.We analysis the seismic data generated by airgun experiments taken in Shangguan water reservoir in 2006,find that,airguns in a water reservoir can generate high energy S waves,and the S waves are converted waves at the water-solid interface from P waves generated by the airgun source.The one-dimensional Poisson's ratio model of southern Yanshan uplift were got from S and P wave velocity models,which were derived by comparison of calculated synthetic seismograms with the recorded seismic data generated by airguns in Shangguan water reservoir.Our research indicate that: 1) The crustal thickness of the study area is 33 km.2) Poisson's ratio of the crust in the study area is lower than the average of the global.Poisson's ratio in the upper crust(0~14 km),middle crust(14~28 km),lower crust(28~33 km) and upper mantle(about 33 km) is 0.25,0.25,0.27,0.27,indicate that the composition of the upper and middle crust is felsic rocks,the composition of the lower crust and the upper mantle are mafic and intermediate rocks.3) The low velocity zones mainly caused by fluid both exist in the upper and lower crust in the study area.
引文
[1]许卫卫,郑天愉.渤海湾盆地北西盆山边界地区泊松比分布[J].地球物理学报,2005,48(5):1077-1084.Xu W W,Zheng T Y.Distribution of Poisson’s ratios in thenorthwestern basin-mountain boundary of the Bohai Bay Basin[J].Chinese J.Geophys.(in Chinese),2005,48(5):1077-1084.
    [2]刘斌,席道瑛,葛宁洁,等.不同围压下岩石中泊松比的各向异性[J].地球物理学报,2002,45(6):880-890.Liu B,Xi D Y,Ge N J,et al.Anisotropy of poisson’s ratio inrock samples under confining pressures[J].Chinese J.Geophys.(in Chinese),2008,45(6):880-890.
    [3]Musacchio G,Mooney W D,Nikolas J H L,et al.Composition ofthe crust in the Grenville and Appalachian Provinces of NorthAmerica inferred from VP/VSratios[J].J.Geophys.Res.,1997,102(B7):15225-15241.
    [4]Christensen N I,Mooney W D.Seismic velocity structure andcomposition of the continental crust:A global view[J].J.Geophys.Res.,1995,100(B6):9761-9788.
    [5]王峻,刘启元,陈九辉,等.首都圈地区的地壳厚度及泊松比[J].地球物理学报,2009,52(1):57-66.Wang J,Liu Q Y,Chen J H,et al.The crustal thickness andPoisson’s ratio beneath the Capital Circle Region[J].ChineseJ.Geophys.(in Chinese),2009,52(1):57-66.
    [6]齐诚,赵大鹏,陈颙,等.首都圈地区地壳P波和S波三维速度结构及其与大地震的关系[J].地球物理学报,2006,49(3):805-815.Qi C,Zhao D P,Chen Y,et al.3-D P and S wave velocitystructures and their relationship to strong earthquakes in theChinese capital region[J].Chinese J.Geophys.(in Chinese),2006,49(3):805-815.
    [7]Wang Y,Wen L X,Weidner D,et al.SH velocity andcompositional models near the 660-km discontinuity beneathSouth America and northeast Asia[J].J.Geophys.Res.,2006,111(B7):B07305.
    [8]姚陈,郝重涛,蔡明刚.理论地震图解释爆破源横波[A].//中国地球物理学会第二十三届年会论文集[C].青岛:中国海洋大学出版社,2007:617.Yao C,Hao Z T,Cai M G.Synthetic seismograms forexplanation of explosion source with shear wave[A].//Annual of the Chinese Geophysical Society 2007[C](inChinese).Qingdao:Ocean University Press,2007:617.
    [9]刘志,张先康,潘纪顺,等.阿尼玛卿缝合带及两侧上地壳泊松比分布[J].地球物理学进展,2009,24(5):1627-1635,doi:10.3969/j.issn.1004-2903.2009.05.011.Liu Z,Zhang X K,Pan J S,et al.Poisson’s ratio distributionin the upper crust around the A’nyemaqên suture zone and itsadjacent areas[J].Progress in Geophys.(in Chinese),2009,24(5):1627-1635,doi:10.3969/j.issn.1004-2903.2009.05.011.
    [10]陈浩林,全海燕,於国平,等.气枪震源理论与技术综述(上)[J].物探装备,2008,18(4):211-217.Chen H L,Quan H Y,Yu G P,et al.Summary of airgunsource theory and technology(1)[J].Equipment forGeophysical Prospecting(in Chinese),2008,18(4):211-217.
    [11]丘学林,陈颙,朱日祥,等.大容量气枪震源在海陆联测中的应用:南海北部试验结果分析[J].科学通报,2007,52(4):463-469.Qiu X L,Chen Y,Zhu R X,et al.The application of largevolume airgun sources to the onshore-offshore seismicsurveys:Implication of the experimental results in northernSouth China Sea[J].Chinese Science Bulletin,2007,52(4):553-560.
    [12]陈颙,张先康,丘学林,等.陆地人工激发地震波的一种新方法[J].科学通报,2007,52(11):1317-1321.Chen Y,Zhang X K,Qiu X L,et al.A new way to generateseismic waves for continental crustal exploration[J].ChineseScience Bulletin,2007,52(16):2264-2268.
    [13]林建民,王宝善,葛洪魁,等.大容量气枪震源特征及地震波传播的震相分析[J].地球物理学报,2008,51(1):206-212.Lin J M,Wang B S,Ge H K,et al.Study on large volumeairgun source characteristics and seismic phase analysis[J].Chinese J.Geophys.(in Chinese),2008,51(1):206-212.
    [14]唐杰,王宝善,葛洪魁,等.大容量气枪震源的实验与模拟研究[J].中国地震,2009,25(1):1-10.Tang J,Wang B S,Ge H K,et al.Study of experiment andsimulation of large volume air-gun in deep structuresexploration[J].Earthquake Research in China(in Chinese),2009,25(1):1-10.
    [15]张尉,戴恒昌,李向阳,等.水库气枪震源产生的S波及其分裂[J].地震地质,2009,31(1):22-33.Zhang W,Dai H C,Li X Y,et al.Shear wave generated byairguns in a reservoir and its splitting[J].Seismology andGeology(in Chinese),2009,31(1):22-33.
    [16]Daley P F,Hron F.High-frequency approximation to thenongeometrical S*arrival[J].Bulletin of the SeismologicalSociety of America,1983,73(1):109-123.
    [17]Daley P F,Hron F.A non-geometrical sh-arrival[J].Geophysical Prospecting,1988,36(4):430-445.
    [18]Allouche N,Drijkoningen G G,Versteeg W,et al.Convertedwaves in a shallow marine environment:Experimental andmodeling studies[J].Geophysics,2011,76(1):T1-T11.
    [19]陈剑雄,王宝善,葛洪魁,等.气枪探测资料对华北地区地壳低速带的约束[J].中国地震,2011,27(1):49-55.Chen J X,Wang B S,Ge H K,et al.Using information ofairgun to contract the low velocity zone in crustal in northChina[J].Earthquake Research in China(in Chinese),2011,27(1):49-55.
    [20]Wang R J.A simple orthonormalization method for stable andefficient computation of Green’s functions[J].Bulletin of theSeismological Society of America,1999,89(3):733-741.
    [21]刘宝峰,李松林,张先康,等.玛沁-靖边剖面S波资料研究与探讨[J].地震学报,2003,25(1):82-88.Liu B F,Li S L,Zhang X K,et al.Study of crustal structurewith S-wave data from Maqin-Jingbian profile[J].ActaSeismologica Sinica(in Chinese),2003,25(1):82-88.
    [22]徐煜坚,罗焕炎,虢顺民,等.华北北部地区地质模型与强震迁移[M].北京:地震出版社,1985.Xu Y J,Luo H Y,Guo S M,et al.Geological Models andMigration of Strong Earthquakes in North China[M](inChinese).Beijing:Earthquake Press,1985.
    [23]宋松岩,周雪松,张先康,等.北京-丰镇DSS剖面S波资料的解释和推断[J].地震学报,1998,20(1):60-67.Song S Y,Zhou X S,Zhang X K,et al.Geologicalinterpretation and inference of S wave data along the Beijing-Fengzhen profile[J].Acta Seismologica Sinica(in Chinese),1998,20(1):60-67.
    [24]嘉世旭,张先康.华北不同构造块体地壳结构及其对比研究[J].地球物理学报,2005,48(3):611-620.Jia S X,Zhang X K.Crustal structure and comparison ofdifferent tectonic blocks in North China[J].Chinese J.Geophys.(in Chinese),2005,48(3):611-620.
    [25]Christensen N I.Poisson’s ratio and crustal seismology[J].J.Geophys.Res.,1996,101(B2):3139-3156.
    [26]Owens T J,Zandt G.Implications of crustal property variationsfor models of Tibetan plateau evolution[J].Nature,1997,387(6628):37-43.
    [27]嵇少丞,王茜,杨文采.华北克拉通泊松比与地壳厚度的关系及其大地构造意义[J].地质学报,2009,83(3):324-330.Ji S C,Wang Q,Yang W C.Correlation between crustalthickness and poisson’s ratio in the north china craton and itsimplication for lithospheric thinning[J].Acta GeologicaSinica(in Chinese),2009,83(3):324-330.
    [28]Mooney W D.大陆地壳(一)[J].郑文俊,译.世界地震译丛,2004(1):75-83.Mooney W D.Continental Crust[J].Translated by ZhangW J.Translated World Seismology(in Chinese),2004(1):75-83.
    [29]邱瑞照,李廷栋,邓晋福,等.华北地区三类岩石圈的壳幔岩石学结构与化学结构及其大陆动力学意义[J].岩石矿物学杂志,2004,23(2):127-140.Qiu R Z,Li T D,Deng J F,et al.Crust-mantle petrologicaland petrochemical structures of three kinds of lithospheres inNorth China and their continental dynamic implications[J].Acta Petrologica et Mineralogica(in Chinese),2004,23(2):127-140.
    [30]胡圣标,何丽娟,汪集旸.中国大陆地区大地热流数据汇编(第三版)[J].地球物理学报,2001,44(5):611-626.Hu S B,He L J,Wang J W.Compilation of heat flow data inthe China continental area(3rd edition)[J].Chinese J.Geophys.(in Chinese),2001,44(5):611-626.
    [31]张友南,马瑾.深部地壳镁铁质岩石波速的研究[J].地球物理学报,1997,40(2):221-230.Zhang Y N,Ma J.Investigation on compressional wavevelocities of mafic rocks in deep crust[J].Chinese J.Geophys.(Acta Geophysica Sinica)(in Chinese),1997,40(2):221-230.

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