华北克拉通东部地壳与地幔盖层结构——长观测距深地震测深剖面结果
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摘要
利用文登—阿拉善左旗长观测距地震宽角反射/折射剖面东段资料,辩识出4组地壳震相和3组地幔盖层震相.采用二维射线追踪走时反演和正演拟合交替计算方法,得到了包括鲁东隆起和华北裂陷盆地在内的地壳和地幔盖层二维速度结构.研究结果表明:华北裂陷盆地基底深达6km以上,研究区壳内界面C1埋深约15km,C2界面深约25km,Moho面平均埋深约35km.上地壳速度6.0~6.1km·s-1,且横向变化较大;中地壳速度相对均匀约为6.2~6.4km·s-1;下地壳速度为6.5~7.0km·s-1,速度梯度较大.地壳平均速度与隆起和坳陷构造相关.研究区岩石圈底界面一般为75~80km,西端接近太行隆起构造时深至90km左右,向西呈明显加深趋势,地壳厚度呈现相同的增厚特征.地幔盖层上部速度8.0~8.2km·s-1,具明显正梯度特征.岩石圈平均速度在郯庐断裂带附近显著偏低.PmP和PLP震相存在不同程度的复杂性,意味着在本地区Moho界面和岩石圈界面有较为复杂的结构,可能具有一定厚度或过渡带性质.结合其他研究结果认为,地幔盖层和下地壳速度梯度、界面性质差异与华北克拉通破坏相关,意味着破坏是一个渐变、缓慢和不均匀的过程.郯庐断裂带附近的低速应是其为软弱带的证据.
The destruction of North China Craton(NCC)plays an important role in understanding the continent′s formation and evolution.Long-range deep seismic sounding profile is a valid method in studying on NCC′s tectonic evolution since it can give more accurate information of the lithosphere′structure and thickness.In fact,most research results of structure deeper than crust are based on earthquake data due to economic and technological factors and hardly on artificial sources data.The structure reconstruction of crust and lower lithosphere beneath east section of Wendeng-Alxa Zuoqi has been performed from a long-range seismic wideangle-reflection/refraction data in order to provide seismic evidence for the destruction of NCC.We identified several crust and lower lithosphere phases on the long-range wide-angle-reflection/refraction seismic record sections.Then the velocity structure of crust and lower lithosphere has been reconstructed by use of the method of two-dimensional inversion and forward calculation of travel times alternatively.The destruction mechanism and process of NCC have been discussed according to the structure of crust and lower lithosphere obtained in this work taking into account of the previous research results.Four seismic phases are identified and defined as follows:the first arrive,Pg,is a diving wave penetrating into the sedimentary or the crystalline upper crust,the phases of P1 P and PcP are reflections from intracrustal layers,PmP is a strong wide angle reflection from the Moho or refraction from the lower crust.The other 3phases beneath the Moho are identified,Pn,PL1,PLP,of which PL1 and PLP are refraction and reflection phases from lower lithosphere.The results show the basement depth of North China Rift Basin is 6km,the depths of C1 and C2interfaces within the crust are~15km and~25km respectively and the average depth of Moho is~35km.The upper crustal velocity is 6.0~6.1km·s-1 characterized by larger lateral variations,the middle crust is relatively uniform with the velocity 6.2~6.4km·s-1 and the velocity of lower crust is 6.5~7.0km·s-1 with a vertical larger velocity gradient.The average crust velocity is associated with the uplift or depression tectonics.The lithosphere bottom is generally 75~80km in depth and it increases to~90km at the western end near to Taihang uplift region,and the crust also thickens westwards.The velocity of upper part of lower lithosphere is8.0~8.2km·s-1 showing distinct positive gradient feature while lithosphere average velocity around Tan-Lu fault zone is observably lower.The different complexity of PmP and PLP phase means a more complex structure of Moho and lithosphere bottom which probably has a certain thickness or behave as a transitional zone.The thickness of lithosphere is 75~80km in the research area which is consistent with the results from receiver function.The results of the 2Dvelocity structure model,relatively lower avereage velocity of lithosphere around Tan-Lu fault zone and complicated transition zone structures between crust and mantle and between lithosphere and asthenosphere obtained by this work,support the conclusion that the process of destruction of NCC is complicated and gradual,and a tectonic weak belt of lithospheres′mantle occurs near the Tan-Lu fault zone.
引文
Ansorge J,Bonjer K P,Emter D.1979.Structure of the uppermostmantle from long-range seismic observations in southernGermany and the Rhinegraben area.Tectonophysics,56(1-2):31-48.
    Bamford D,Faber S,Jacob B,et al.1976.A lithospheric seismicprofile in Britain-I preliminary results.Geophys.J.Int.,44(1):145-160.
    Behm M,Brückl E,Mitterbauer U.2007.A new seismic model ofthe eastern Alps and its relevance for geodesy andgeodynamics.Vermessung&Geoinformation,121-133.
    Chen L,Zheng T Y,Xu W W.2006a.Receiver function migrationimage of the deep structure in the Bohai Bay Basin,easternChina.Geophysical Research Letters,33(20):L20307,doi:10.1029/2006GL027593.
    Chen L,Zheng T Y,Xu W W.2006b.A thinned lithospheric imageof the Tanlu Fault Zone,eastern China:Constructed fromwave equation based receiver function migration.J.Geophys.Res.,111(B9):B09312,doi:10.1029/2005JB003974.
    Chen L,Zhu R X,Wang T.2007.Progess in continentallithosphere studies.Earth Science Frontiers(in Chinese),14(2):58-75.
    Chen L,Wang T,Zhao L,et al.2008.Distinct lateral variation oflithospheric thickness in the Northeastern North China Craton.Earth and Planetary Science Letters,267(1-2):56-68.
    Chen L.2009.Lithospheric structure variations between the easternand central North China Craton from S-and P-receiver functionmigration.Physics of the Earth and Planetary Interiors,173(3-4):216-227.
    Chen L,Cheng C,Wei Z G.2009.Seismic evidence for significantlateral variations in lithospheric thickness beneath the centraland western North China Craton.EarthandPlanetaryScienceLetters,286(1-2):171-183.
    Chen L,Wei Z G,Cheng C.2010.Significant structural variationsin the Central and Western North China craton and itsimplications for the craton destruction.Earth Science Frontiers,17(1):212-228.
    Duan Y H,Zhang X K,Fang S M,et al.2002.Three-dimensionalfinite-difference tomography of velocity structure of the uppercrustal in north China.Chinese J.Geophys.(in Chinese),45(3):362-369.
    Egorkin A V,Zuganov S K,Pavlenkova N A,et al.1987.Resultsof lithospheric studies from long-range profiles in Siberia.Tectonophysics,140(1):29-47.
    Fuchs K.1979.Structure,physical properties and lateral heterogeneities ofthe subcrustal lithosphere from long-range deep seismic soundingobservations on continents.Tectonophysics,56(1-2):1-15.
    Gao S,Zhang J F,Xu W L,et al.2009.Delamination anddestruction of the North China Craton.Chinese ScienceBulletin,54(19):3367-3378,doi:10.1007/s11434-009-0395-9.
    Hirn A,Steinmetz L,Kind R,et al.1973.Long-range profiles inwestern Europe:II.Fine structure of the lower lithosphere inFrance(southern Bretagne).Z.Geophys.,39:363-384.
    Hirn A,Prodehl C,Steinmetz L.1975.An experimental test ofmodels of the lower lithosphere in Bretagne(France).Ann.Geophys.,31:517-530.
    Hirn A.1977.Anisotropy in the continental upper mantle:possibleevidence from explosion seismology.Geophys.J.Int.,49(1):49-58.
    Hole J A,Zelt B C.1995.3-D finite-difference reflection traveltimes.Geophys.J.Int.,121(2):427-434.
    Jia S X,Zhang X K.2005.Crustal structure and comparison ofdifferent tectonic blocks in North China.Chinese J.Geophys.(in Chinese).,48(3):611-620,doi:10.3321/j.issn:0001-5733.2005.03.019.
    Jia S X,Zhang C K,Zhao J R,et al.2009.Crustal structure of therift-depression basin and Yanshan uplift in the northeast part ofNorth China.Chinese J.Geophys.(in Chinese),52(1):99-110.
    Jia S X,Wang F Y,Tian X F,et al.2014.Crustal structure andtectonic study of North China Craton from a long deep seismicsounding profile.Tectonophysics,627:48-56.
    Jiang M M,Ai Y D,Chen L,et al.2013.Local modification of thelithosphere beneath the central and western North ChinaCraton:3-D constraints from Rayleigh wave tomography.Gondwana Research,24(3-4),doi:10.1016/j.gr.2012.06.018.
    Kaminski W,Bamford D,Faber S,et al.1976.A lithosphericseismic profile in Britain-II preliminary report on the recordingof a local earthquake.J.Geophys.,42:103-110.
    Kind R.1974.Long range propagation of seismic energy in thelower lithosphere.J.Geophys.,40:189-202.
    Li S L,Zhang X K,Song Z L,et al.2001.Three-dimensionalcrustal structure of the capital area obtained by ajoint inversionof DSS data from multiple profiles.Chinese J.Geophys.(inChinese),44(3):360-368,doi:10.3321/j.issn:0001-5733.2001.03.008.
    Li F,Xu T,Wu Z B,et al.2013.Segmentally iterative ray tracingin 3-D heterogeneous geological models.Chinese J.Geophys.(in Chinese),56(10):3514-3522,doi:10.6038/cjg20131026.
    Li S L,Lai X L,Liu B F,et al.2011.Differences in lithosphericstructures between two sides of Taihang Mountain obtainedfrom the Zhucheng-Yichuan deep seismic sounding profile.Sci.China Earth Sci.,54(6):871-880,doi:10.1007/s11430-011-4191-4.
    Liu Z,Zhang X K,Wang F Y,et al.2005.2-D crustal Poisson′sratio from seismic travel time inversion in Changbaishan Tianchivolcanic region.Acta Seismologica Sinica(in Chinese),18(3):345-353.
    Liu Z,Zhang X K,Pan J S,et al.2009.Poisson′s ratio distributionin the upper crust around the A′nyemaqên suture zone and itsadjacent areas.Progress in Geophys.(in Chinese),24(5):1627-1635,doi:10.3969/j.issn.1004-2903.2009.05.011.
    Marek G,Alekander G,Randy K G,et al.2006.Lithosphericstructure beneath trans-Carpathian transect from Precambrianplatform to Pannonian basin:CELEBRATION 2000seismicprofile CEL05.Journal of Geophysical Research,111(B3):B03301,doi:10.1029/2005JB003647.
    Perchuc E,Thybo H.1996.A new model of upper mantle P-wavevelocity below the Baltic Shield:indication of partial melt in the95to 160km depth range.Tectonophysics,253(3-4):227-245.
    Priestley K,Cipar J,Egorkin A,et al.1994.Upper-mantle velocitystructure beneath the Siberian platform.Geophys.J.Int.,118(2):369-378.
    Ryaboy V Z.1977.Study of the structure of the lower lithosphereby explosion seismology in the USSR.J.Geophys.,43:593-610.
    Teng J W,Wang G J,Zhang Z J,et al.2000.The south-extendingof 3-D S-wave velocity structure and Tanlu fault zone in SouthChina.Chinese Science Bulletin(in Chinese),45(23):2492-2498.
    Tian X F,Zelt C A,Wang F Y,et al.2014.Crust structure of theNorth China Craton from a long-range seismic wide-anglereflection/refraction data.Tectonophysics,634:237-245,doi:10.1016/j.tecto.2014.07.008.
    Wang C Y,Zhang X K,Wu Q J,et al.1994.Seismic evidence ofdetachment in north China basin.Chinese J.Geophys.(in Chinese),37(5):613-620.
    Wang F Y,Zhang X K,Chen Y,et al.2004.2-D P-wave velocitystructure in the mideast segment of Zhangjiakou-Bohai tectoniczone:Anxin-Xianghe-Kuancheng DSS profile.Acta SeismologicaSinica(in Chinese),26(7):31-41.
    Xu T,Xu G M,Gao E G,et al.2004.Block modeling and shootingray tracing in complex 3Dmedia.Chinese J.Geophys.(in Chinese),47(6):1118-1126.
    Xu T,Xu G M,Gao E G,et al.2006.Block modeling andsegmentally iterative ray tracing in complex 3D media.Geophysics,71(3):T41-T51.
    Xu T,Zhang Z,Gao E,et al.2010.Segmentally iterative raytracing in complex 2D and 3D heterogeneous block models.Bulletin of the Seismological Society of America,100(2):841-850.
    Xu T,Li F,Wu Z B,et al.2014.A successive three-pointperturbation method for fast ray tracing in complex 2Dand 3Dgeological models.Tectonophysics,627:72-81.
    Xu Y,Liu J H,Hao T Y,et al.2006.P-wave velocity structureand tectonics analysis of lithospheric mantle in eastern Chinaseas and adjacent regions.Chinese J.Geophys.(in Chinese),49(4):1053-1061.
    Xu Y G,Li H Y,Pang C J,et al.2009.On the timing and durationof the destruction of the North China Craton.Chinese ScienceBulletin,54(19):3379-3396,doi:10.1007/s11434-009-0346-5.
    Xu Z Q,Zhang G W.2013.Progress in tectonics and dynamics ofChina(East Asia)———Forum on frontiers of science&technology:Tectonics and dynamics of China(East Asia)(inChinese).Scientia Sinica Terrae,43(10):1527-1538.
    Zelt C A,Smith R B.1992.Seismic traveltime inversion for 2-Dcrustal velocity structure.Geophys.J.Int.,108(1):16-34.
    Zelt C A,Forsyth D A,Milkereit B,et al.1994.Seismic structureof the Central Metasedimentary Belt,southern GrenvilleProvince.Can.J.Earth.Sci.,31(2):243-254.
    Zelt C A,White D J.1995.Crustal structure and tectonics of thesoutheastern Canadian Cordillera.J.Geophys.Res.,100(B12):24255-24273.
    Zhang C K,Zhang X K,Zhao J R,et al.2002.Study and review oncrust-mantle velocity structure in Bohai bay and its adjacentareas.Acta Seismologica Sinica(in Chinese),24(4):428-435.
    Zhang X K,Wang C Y,Liu G D,et al.1996.Fine crustal structurein Yanqing-Huailai region by deep seismic reflection profiling.Chinese J.Geophys.(in Chinese),39(3):356-364.
    Zhao J R,Zhang X K,Zhang C K,et al.2006.Features of deepcrustal structure beneath the Wutai mountain area of Shanxiprovince.Chinese J.Geophys.(in Chinese),49(1):123-129.
    Zhao L,Allen R M,Zheng T,et al.2012.High-resolution bodywave tomography models of the upper mantle beneath easternChina and the adjacent areas.Geochem.Geophys.Geosyst.,13(6):Q06007,doi:10.1029/2012GC004119.
    Zheng Y F,Wu F Y.2009.Growth and reworking of cratoniclithosphere.Chinese Science Bulletin,54(19):3347-3353,doi:10.1007/s11434-009-0458-y.
    Zhou X H.2006.Major transformation of subcontinental lithospherebeneath eastern China in the Cenozoic-Mesozoic:review andprospect.Earth Science Frontiers(in Chinese),13(2):50-64.
    Zhu G,Song C Z,Niu M L,et al.2002.Lithospheric textures ofthe Tan-Lu fault zone and their genetic analysis.GeologicalJournal of China Universities,8(3):248-256.
    Zhu G,Hu Z Q,Chen Y,et al.2008.Evolution of early cretaceousextensional basins in the eastern North China craton and itsimplication for the craton destruction.Geological Bulletin ofChina(in Chinese),27(10):1594-1604.
    Zhu R X,Zheng T Y.2009.Destruction geodynamics of the NorthChina Craton and its Paleoproterozoic plate tectonics.ChineseScience Bulletin,54(19):3354-3366,doi:10.1007/s11434-009-0451-5.
    Zhu R X,Chen L,Wu F Y,et al.2011.Timing,scale andmechanism of the destruction of the North China Craton.Sci.China Earth Sci.,54(6):789-797,doi:10.1007/s11430-011-4203-4.
    Zhu R X,Xu Y G,Zhu G,et al.2012.Destruction of the NorthChina Craton.Sci.China Earth Sci.,55(10):1565-1587,doi:10.1007/s11430-012-4516-y.
    陈凌,朱日祥,王涛.2007.大陆岩石圈研究进展.地学前缘,14(2):58-75.
    陈凌,危自根,程骋.2010.从华北克拉通中、西部结构的区域差异性探讨克拉通破坏.地学前缘,17(1):212-228.
    段永红,张先康,方盛明等.2002.华北地区上部地壳结构的三维有限差分层析成像.地球物理学报,45(3):362-369.
    高山,章军锋,许文良等.2009.拆沉作用与华北克拉通破坏.科学通报,54(14):1962-1973.
    嘉世旭,张先康.2005.华北不同构造块体地壳结构及其对比研究.地球物理学报,48(3):611-620,doi:10.3321/j.issn:0001-5733.2005.03.019.
    嘉世旭,张成科,赵金仁等.2009.华北东北部裂陷盆地与燕山隆起地壳结构.地球物理学报,52(1):99-110.
    李松林,张先康,宋占隆等.2001.多条人工地震测深剖面资料联合反演首都圈三维地壳结构.地球物理学报,44(3):360-368,doi:10.3321/j.issn:0001-5733.2001.03.008.
    李飞,徐涛,武振波等.2013.三维非均匀地质模型中的逐段迭代射线追踪.地球物理学报,56(10):3514-3522,doi:10.6038/cjg20131026.
    李松林,赖晓玲,刘宝峰等.2011.由诸城—宜川人工地震剖面反演结果看太行山两侧岩石圈结构的差异.中国科学:地球科学,41(5):668-677.
    刘志,张先康,王夫运等.2005.用地震走时反演计算长白山天池火山区二维地壳泊松比.地震学报,27(3):324-331.
    刘志,张先康,潘纪顺等.2009.阿尼玛卿缝合带及两侧上地壳泊松比分布.地球物理学进展,24(5):1627-1635,doi:10.3969/j.issn.1004-2903.2009.05.011.
    滕吉文,王光杰,张中杰等.2000.华南大陆S波三维速度结构与郯庐断裂带的南延.科学通报,45(23):2492-2498.
    王椿镛,张先康,吴庆举等.1994.华北盆地滑脱构造的地震学证据.地球物理学报,37(5):613-620.
    王夫运,张先康,陈颙等.2004.张渤构造带中东段二维P波速度结构———安新—香河—宽城剖面.地震学报,26(7):31-41.
    徐涛,徐果明,高尔根等.2004.三维复杂介质的块状建模和试射射线追踪.地球物理学报,47(6):1118-1126.
    胥颐,刘建华,郝天珧等.2006.中国东部海域及邻区岩石层地幔的P波速度结构与构造分析.地球物理学报,49(4):1053-1061.
    徐刚,李洪颜,庞崇进等.2009.论华北克拉通破坏的时限.科学通报,54(14):1974-1989.
    许志琴,张国伟.2013.中国(东亚)大陆构造与动力学———科学与技术前沿论坛“中国(东亚)大陆构造与动力学”专题进展.中国科学:地球科学,43(10):1527-1538.
    张成科,张先康,赵金仁等.2002.渤海湾及其邻区壳幔速度结构研究与综述.地震学报,24(4):428-435.
    张先康,王椿镛,刘国栋等.1996.延庆—怀来地区地壳细结构———利用深地震反射剖面.地球物理学报,39(3):356-364.
    赵金仁,张先康,张成科等.2006.山西五台山地区地壳深部结构特征研究.地球物理学报,49(1):123-129.
    郑永飞,吴福元.2009.克拉通岩石圈的生长和再造.科学通报,54(14):1945-1949.
    周新华.2006.中国东部中、新生代岩石圈转型与减薄研究若干问题.地学前缘,13(2):50-64.
    朱光,宋传中,牛漫兰等.2002.郯庐断裂带的岩石圈结构及其成因分析.高校地质学报,8(3):248-256.
    朱光,胡召齐,陈印等.2008.华北克拉通东部早白垩世伸展盆地的发育过程及其对克拉通破坏的指示.地质通报,27(10):1594-1604.
    朱日祥,郑天愉.2009.华北克拉通破坏机制与古元古代板块构造体系.科学通报,54(14):1950-1961.
    朱日祥,陈凌,吴福元等.2011.华北克拉通破坏的时间、范围与机制.中国科学:地球科学,41(5):583-592.
    朱日祥,徐义刚,朱光等.2012.华北克拉通破坏.中国科学:地球科学,42(8):1135-1159.

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