中国东南沿海岩石圈减薄的地震接收函数证据
摘要
晚中生代以来,中国东南大陆岩石圈受到大规模构造-岩浆活动的影响而被强烈改造,现今岩石圈是古老岩石圈被强烈减薄和置换后的结果,但这一由地球化学和岩石学研究提出的地球动力学模型一直缺乏可靠的地震学观测证据的支持.本文利用布设于中国东南沿海(福建)的两条宽频地震剖面的远震波形数据,提取P波接收函数(P-RF)和S波接收函数(S-RF),从单台P-RF中识别出了在岩石圈底界LAB(Lithosphere-Asthenosphere Boundary)的转换震相Pls,分析结果得到LAB深度为60~70 km,P波(Pls震相)和S波(Slp震相)接收函数的波形拟合反演和对比结果及对地壳和上地幔结构的成像进一步证明了上述结果.P波和S波接收函数偏移图像显示,LAB界面在60~70 km的深度上沿北东向剖面平缓展布,在闽江河口处的上地幔顶部岩石圈结构有明显变化,P-RF的一次转换波Ps和多次波Pp Ps偏移图像显示了Moho界面跨过闽江断裂的突然下沉,前人的深地震测深研究亦得到相同的结果,结合闽江河口处地壳泊松比和地壳热流呈现局部异常高值等地质地球物理特征,推断闽江断裂深切壳、幔边界,并有可能影响到了更深部的岩石圈结构.
引文
陈宗基,孔祥儒,刘云龙.1992.福建地热地球物理研究.北京:中国科学技术出版社
郭震,唐有彩,陈永顺,等.2012.华北克拉通东部地壳和上地结构的接收函数研究.地球物理学报,55:3591–3600
李立.1996.中国大陆地壳上地幔电性特征.地球物理学报,36(增刊):130–140
廖其林,王振明,王屏路,等.1988.福州-泉州-汕头地区地壳结构的爆炸地震研究.地球物理学报,31:270–280
廖其林,王振明,丘陶兴,等.1990.福州盆地及其周围地区地壳深部结构与构造的初步研究.地球物理学报,33:163–173
邵学钟,顾忠华,张家茹.1993.福州地区地壳结构的地震转换波测深研究.地震地质,15:174–180
沈旭章.2011.上海佘山(SSE)地震台站下方170 km深度低速界面研究.地球物理学报,54:698–705
滕吉文,吴华,王爱武,等.1994.中国东南陆缘地带岩石圈结构和动力学.中国科学B辑,24:866–875
万天丰,赵庆乐.2012.中国东部构造-岩浆作用的成因.中国科学:地球科学,42:155–163
万天丰,王亚妹,刘俊来.2008.中国东部燕山期和四川期岩石圈构造滑脱与岩浆起源深度.地学前缘,15:1–35
王椿镛,林中洋,陈学波.1995.青海门源-福建宁德地学断面综合地球物理研究.地球物理学报,38:590–598
王亚妹,万天丰.2008.中国东部新生代岩石圈构造滑脱、岩浆活动和地震.现代地质,22:207–229
熊绍柏,金东敏,孙克忠,等.1991.福建漳州地热田及其邻近地区的地壳深部构造特征.地球物理学报,34:55–63
叶卓,李秋生,高锐,等.2013.中国大陆东南缘地震接收函数与地壳和上地幔结构.地球物理学报,56:2947–2958
张路,曲国胜,陈建强.2009.福建东南沿海第四纪盆地构造沉降.第四纪研究,29:633–643
朱金芳,徐锡伟,张先康,等.2005.福州盆地及邻区地壳精细结构的深地震反射与高分辨率折射及宽角反射/折射联合探测研究.中国科学D辑:地球科学,35:738–749
朱金芳,方盛明,张先康,等.2006.漳州盆地及其邻区地壳深部结构的探测与研究.中国地震,22:405–417
Ai Y S,Cheng Q F,Zeng F,et al.2007.The crust and upper mantle structure beneath southeastern China.Earth Planet Sci Lett,260:549–563
An M J,Shi Y L.2006.Lithospheric thickness of the Chinese continent.Phys Earth Planet Inter,159:257–266
Artemieva I M,Mooney W D.2001.Thermal thickness and evolution of Precambrian lithosphere:A global study.J Geophys Res,106:16387–16414
Chen L,Zheng T Y,Xu W W.2006a.A thinned lithospheric image of the Tanlu fault zone,eastern China:Constructed from wave equation basedreceiver function migration.J Geophys Res,111:B09312,doi:10.1029/2005JB003974
Chen L,Zheng T Y,Xu W W.2006b.Receiver function migration image of the deep structure in the Bohai Bay Basin,eastern China.GeophysRes Lett,33:L20307,doi:10.1029/2006GL027593
Farra V,Vinnik L P.2000.Upper mantle stratification by P and S receiver functions.Geophys J Int,141:699–712
Griffin W L,Zhang A,O’Reilly S Y,et al.1998.Phanerozoic evolution of the lithosphere beneath the Sino-Korean craton.In:Flower M F J,Chung S L,Lo C H,et al,eds.Mantle Dynamics and Plate Interactions in East Asia.Amer Geophys Union Geodyn Ser,27:107–126
Hu S,He L,Wang J.2000.Heat flow in the continental area of China:A new data set.Earth Planet Sci Lett,179:407–419
Huang Z X,Xu Y,Hao T Y,et al.2009.Surface wave tomography of lithospheric structure in the seas of east China.Chinese J Geophys,52:379–389
Kawakatsu H,Kumar P,Takei Y,et al.2009.Seismic evidence for Sharp Lithosphere-Asthenosphere boundaries of oceanic plates.Science,324:499–502
Kumar P,Yuan X H,Kind R,et al.2006.Imaging the collision of the Indian and Asian Continental Lithospheres Beneath Tibet.J Geophys Res,111:B06308,doi:10.1029/2005JB003930
Kumar P,Yuan X,Kind R,et al.2005.The lithosphere-asthenosphere boundary in the Tien Shan-Karakoram region from S receiver functions:Evidence for continental subduction.Geophys Res Lett,32:L07305,doi:10.1029/2004GL022291
Li H Y,Liu F T,Sun R M,et al.2001.Crust and upper mantle structure in east China and sea areas.Acta Seismol Sin,14:503–511
Li Q S,Gao R,Wu F,et al.2013.Seismic structure in the southeastern China using teleseismic receiver functions.Tectonophysics,606:24–35
Li X H.2000.Cretaceous magmatism and lithospheric extension in Southeast China.J Asian Earth Sci,18:293–305
Ligorria J P,Ammon C J.1999.Iterative deconvolution and receiver-function estimation.Bull Seismol Soc Amer,89:1395–1400
Rychert C A,Rondenay S,Fischer K A.2007.P-to-S and S-to-P imaging of a sharp lithosphere-asthenosphere boundary beneath eastern NorthAmerica.J Geophys Res,112:B08314,doi:10.1029/2006JB004619
Rychert C A,Shearer P M.A.2009.Global view of the lithosphere-asthenosphere boundary.Science,324:495–498
Shen X Z,Zhou Y Z,Zhang Y S,et al.2014.Receiver function structures beneath the deep large faults in the northeastern margin of the TibetanPlateau.Tectonophysics,610:63–73
Shi D N,Zhao W J,Brown L,et al.2004.Detection of southward intracontinental subduction of Tibetan lithosphere along the Bangong-Nujiangsuture by P-to-S converted waves.Geology,32:209–212
Tsai Y B,Wu H H.2000.S-wave velocity structure of the crust and upper mantle under southeastern China by surface wave dispersion analysis.JAsian Earth Sci,18:255–265
Wang K L,O’Reilly S Y,Griffin W L,et al.2003.Proterozoic mantle lithosphere beneath the extended margin of the South China block:In situRe-Os evidence.Geology,31:709–712
Wilson D C,Angus D A,Ni J F,et al.2006.Constraints on the interpretation of S-to-P receiver functions.Geophys J Int,165:969–980
Wittlinger G,Farra V.2007.Converted waves reveal a thick and layered tectosphere beneath the Kalahari super-craton.Earth Planet Sci Lett,254:404–415
Xu X S,O’Reilly S Y,Griffin W L,et al.2000.Genesis of young lithospheric mantle in Southeastern China:An LAM-ICPMS trace elementstudy.J Petrol,41:111–148
Yuan X,Ni J,Kind R,et al.1997.Lithospheric and upper mantle structure of southern Tibet from a seismological passive source experiment.JGeophys Res,102:27491–27500
Yuan X,Kind R,Li X,et al.2006.The S receiver functions:Synthetics and data example.Geophys J Int,165:555–564
Zhang Z J,Yuan X H,Chen Y,et al.2010.Seismic signature of the collision between the east Tibetan escape flow and the Sichuan Basin.EarthPlanet Sci Lett,292:254–264
Zhou X H.2006.Major transformation of subcontinental lithosphere beneath eastern China in the Cenozoic-Mesozoic:Review and prospect.Earth Sci Front,13:50–64
Zhou X M,Li W X.2000.Origin of Late Mesozoic igneous rocks in Southeastern China:Implications for lithosphere subduction andunderplating of mafic magmas.Tectonophysics,326:269–287
Zhou X M,Sun T,Shen W Z,et al.2006.Petrogenesis of Mesozoic granitoids and volcanic rocks in South China:A response to tectonicevolution.Episodes,29:26–33
Zhu L P.2000.Crustal structure across the San Andreas Fault,southern California from teleseismic converted waves.Earth Planet Sci Lett,179:183–190
Zhu L P.2002.Deformation in the lower crust and downward extent of the San Andreas Fault as revealed by teleseismic waveforms.EarthPlanets Space,54:1005–1010
郭震,唐有彩,陈永顺,等.2012.华北克拉通东部地壳和上地结构的接收函数研究.地球物理学报,55:3591–3600
李立.1996.中国大陆地壳上地幔电性特征.地球物理学报,36(增刊):130–140
廖其林,王振明,王屏路,等.1988.福州-泉州-汕头地区地壳结构的爆炸地震研究.地球物理学报,31:270–280
廖其林,王振明,丘陶兴,等.1990.福州盆地及其周围地区地壳深部结构与构造的初步研究.地球物理学报,33:163–173
邵学钟,顾忠华,张家茹.1993.福州地区地壳结构的地震转换波测深研究.地震地质,15:174–180
沈旭章.2011.上海佘山(SSE)地震台站下方170 km深度低速界面研究.地球物理学报,54:698–705
滕吉文,吴华,王爱武,等.1994.中国东南陆缘地带岩石圈结构和动力学.中国科学B辑,24:866–875
万天丰,赵庆乐.2012.中国东部构造-岩浆作用的成因.中国科学:地球科学,42:155–163
万天丰,王亚妹,刘俊来.2008.中国东部燕山期和四川期岩石圈构造滑脱与岩浆起源深度.地学前缘,15:1–35
王椿镛,林中洋,陈学波.1995.青海门源-福建宁德地学断面综合地球物理研究.地球物理学报,38:590–598
王亚妹,万天丰.2008.中国东部新生代岩石圈构造滑脱、岩浆活动和地震.现代地质,22:207–229
熊绍柏,金东敏,孙克忠,等.1991.福建漳州地热田及其邻近地区的地壳深部构造特征.地球物理学报,34:55–63
叶卓,李秋生,高锐,等.2013.中国大陆东南缘地震接收函数与地壳和上地幔结构.地球物理学报,56:2947–2958
张路,曲国胜,陈建强.2009.福建东南沿海第四纪盆地构造沉降.第四纪研究,29:633–643
朱金芳,徐锡伟,张先康,等.2005.福州盆地及邻区地壳精细结构的深地震反射与高分辨率折射及宽角反射/折射联合探测研究.中国科学D辑:地球科学,35:738–749
朱金芳,方盛明,张先康,等.2006.漳州盆地及其邻区地壳深部结构的探测与研究.中国地震,22:405–417
Ai Y S,Cheng Q F,Zeng F,et al.2007.The crust and upper mantle structure beneath southeastern China.Earth Planet Sci Lett,260:549–563
An M J,Shi Y L.2006.Lithospheric thickness of the Chinese continent.Phys Earth Planet Inter,159:257–266
Artemieva I M,Mooney W D.2001.Thermal thickness and evolution of Precambrian lithosphere:A global study.J Geophys Res,106:16387–16414
Chen L,Zheng T Y,Xu W W.2006a.A thinned lithospheric image of the Tanlu fault zone,eastern China:Constructed from wave equation basedreceiver function migration.J Geophys Res,111:B09312,doi:10.1029/2005JB003974
Chen L,Zheng T Y,Xu W W.2006b.Receiver function migration image of the deep structure in the Bohai Bay Basin,eastern China.GeophysRes Lett,33:L20307,doi:10.1029/2006GL027593
Farra V,Vinnik L P.2000.Upper mantle stratification by P and S receiver functions.Geophys J Int,141:699–712
Griffin W L,Zhang A,O’Reilly S Y,et al.1998.Phanerozoic evolution of the lithosphere beneath the Sino-Korean craton.In:Flower M F J,Chung S L,Lo C H,et al,eds.Mantle Dynamics and Plate Interactions in East Asia.Amer Geophys Union Geodyn Ser,27:107–126
Hu S,He L,Wang J.2000.Heat flow in the continental area of China:A new data set.Earth Planet Sci Lett,179:407–419
Huang Z X,Xu Y,Hao T Y,et al.2009.Surface wave tomography of lithospheric structure in the seas of east China.Chinese J Geophys,52:379–389
Kawakatsu H,Kumar P,Takei Y,et al.2009.Seismic evidence for Sharp Lithosphere-Asthenosphere boundaries of oceanic plates.Science,324:499–502
Kumar P,Yuan X H,Kind R,et al.2006.Imaging the collision of the Indian and Asian Continental Lithospheres Beneath Tibet.J Geophys Res,111:B06308,doi:10.1029/2005JB003930
Kumar P,Yuan X,Kind R,et al.2005.The lithosphere-asthenosphere boundary in the Tien Shan-Karakoram region from S receiver functions:Evidence for continental subduction.Geophys Res Lett,32:L07305,doi:10.1029/2004GL022291
Li H Y,Liu F T,Sun R M,et al.2001.Crust and upper mantle structure in east China and sea areas.Acta Seismol Sin,14:503–511
Li Q S,Gao R,Wu F,et al.2013.Seismic structure in the southeastern China using teleseismic receiver functions.Tectonophysics,606:24–35
Li X H.2000.Cretaceous magmatism and lithospheric extension in Southeast China.J Asian Earth Sci,18:293–305
Ligorria J P,Ammon C J.1999.Iterative deconvolution and receiver-function estimation.Bull Seismol Soc Amer,89:1395–1400
Rychert C A,Rondenay S,Fischer K A.2007.P-to-S and S-to-P imaging of a sharp lithosphere-asthenosphere boundary beneath eastern NorthAmerica.J Geophys Res,112:B08314,doi:10.1029/2006JB004619
Rychert C A,Shearer P M.A.2009.Global view of the lithosphere-asthenosphere boundary.Science,324:495–498
Shen X Z,Zhou Y Z,Zhang Y S,et al.2014.Receiver function structures beneath the deep large faults in the northeastern margin of the TibetanPlateau.Tectonophysics,610:63–73
Shi D N,Zhao W J,Brown L,et al.2004.Detection of southward intracontinental subduction of Tibetan lithosphere along the Bangong-Nujiangsuture by P-to-S converted waves.Geology,32:209–212
Tsai Y B,Wu H H.2000.S-wave velocity structure of the crust and upper mantle under southeastern China by surface wave dispersion analysis.JAsian Earth Sci,18:255–265
Wang K L,O’Reilly S Y,Griffin W L,et al.2003.Proterozoic mantle lithosphere beneath the extended margin of the South China block:In situRe-Os evidence.Geology,31:709–712
Wilson D C,Angus D A,Ni J F,et al.2006.Constraints on the interpretation of S-to-P receiver functions.Geophys J Int,165:969–980
Wittlinger G,Farra V.2007.Converted waves reveal a thick and layered tectosphere beneath the Kalahari super-craton.Earth Planet Sci Lett,254:404–415
Xu X S,O’Reilly S Y,Griffin W L,et al.2000.Genesis of young lithospheric mantle in Southeastern China:An LAM-ICPMS trace elementstudy.J Petrol,41:111–148
Yuan X,Ni J,Kind R,et al.1997.Lithospheric and upper mantle structure of southern Tibet from a seismological passive source experiment.JGeophys Res,102:27491–27500
Yuan X,Kind R,Li X,et al.2006.The S receiver functions:Synthetics and data example.Geophys J Int,165:555–564
Zhang Z J,Yuan X H,Chen Y,et al.2010.Seismic signature of the collision between the east Tibetan escape flow and the Sichuan Basin.EarthPlanet Sci Lett,292:254–264
Zhou X H.2006.Major transformation of subcontinental lithosphere beneath eastern China in the Cenozoic-Mesozoic:Review and prospect.Earth Sci Front,13:50–64
Zhou X M,Li W X.2000.Origin of Late Mesozoic igneous rocks in Southeastern China:Implications for lithosphere subduction andunderplating of mafic magmas.Tectonophysics,326:269–287
Zhou X M,Sun T,Shen W Z,et al.2006.Petrogenesis of Mesozoic granitoids and volcanic rocks in South China:A response to tectonicevolution.Episodes,29:26–33
Zhu L P.2000.Crustal structure across the San Andreas Fault,southern California from teleseismic converted waves.Earth Planet Sci Lett,179:183–190
Zhu L P.2002.Deformation in the lower crust and downward extent of the San Andreas Fault as revealed by teleseismic waveforms.EarthPlanets Space,54:1005–1010
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