福建地区地壳上地幔S波速度结构与泊松比
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摘要
利用在福建地区布置的12个宽频带数字地震流动台站和8个固定台站记录的远震P波波形数据进行接收函数计算,运用H-k搜索叠加方法得到了研究区的平均地壳厚度H与波速比k(=VP/VS),并运用接收函数反演方法得到了0～80km范围内的地壳和上地幔S波速度结构。H-k叠加结果表明,福建地区地壳厚度在28.4～32.8km范围内,从内陆到沿海变薄,从南到北变厚;沿着NW—SE方向,泊松比分布有分带特征,沿海地区泊松比高于内陆地区;同时表明,该地区地壳可分为上、中、下地壳,地壳结构横向差异较明显,多个台站下方可发现壳内低速层,沿海地区上地幔顶部平均速度相对低,可能暗示了深部存在热异常区域。
In this paper,the receiver functions were obtained by analyzing the teleseismic P waveforms recorded by 12 broadband temporary and 8 permanent stations in Fujian Province.By using the H-k stacking method,the average crustal thicknesses and VP/VS ratios were estimated.The S-wave velocity structures of 0-80 km were gained through the linear inversion method.The H-k stacking results show that the crustal thicknesses range from 28.4 to 32.8 km,decreasing from north to south and from inland to offshore of the Fujian Province.Along the NW-SE direction,the Possion, s ratios can be separated into several zones,and the Possion, s ratios in the coastal area are higher than in the inland area.The crust can be divided into three layers:the upper,the middle and the lower crust.Apparently,there are differences among the crustal structures.The low velocity layers of crust appear beneath many stations.The average S-wave velocity of the uppermost mantle is lower in the coastal area than that in the inland area.It may imply that a heat anomaly area occurs in the deep depth.
In this paper,the receiver functions were obtained by analyzing the teleseismic P waveforms recorded by 12 broadband temporary and 8 permanent stations in Fujian Province.By using the H-k stacking method,the average crustal thicknesses and VP/VS ratios were estimated.The S-wave velocity structures of 0-80 km were gained through the linear inversion method.The H-k stacking results show that the crustal thicknesses range from 28.4 to 32.8 km,decreasing from north to south and from inland to offshore of the Fujian Province.Along the NW-SE direction,the Possion, s ratios can be separated into several zones,and the Possion, s ratios in the coastal area are higher than in the inland area.The crust can be divided into three layers:the upper,the middle and the lower crust.Apparently,there are differences among the crustal structures.The low velocity layers of crust appear beneath many stations.The average S-wave velocity of the uppermost mantle is lower in the coastal area than that in the inland area.It may imply that a heat anomaly area occurs in the deep depth.
引文
Ai Y S,Chen Q F,Zeng F,et al.2007.The crust and upper mantle structure beneath southeastern China[J].Earth and Planetary Science Letters,260:549-563.
Ai Y S,Zhao D P,Gao X,et al.2005.The crust and upper mantle discontinuity structure beneath Alaska inferred from receiver functions[J].Physics of the Earth and Planetary Interiors,150:339-350.
Ammo n C J,Randall G E and Zandt G.1990.On the nonuniqueness of receiver function inversions[J].Journal of Geophysical Research,95(B10):15303-15318.
Ammo n C J.1991.The isolation of receiver effects from teleseismic P waveforms[J].Bulletin of the Seismological Society of America,81(6):2504-2510.
Chen Yuantian,Xie Zhizhao,Wang Zhipeng,et al.2001.The latest tectonic motion and seismic risk in Zhangzhou basin,Fujian province[J].Seismology and Geology,23(4):556-563.(in Chinese with English abstract)
Chris tensen N I and Fountain D M.1975.Constitution of the lower continental crust based on experimental studies of seismic velocities in granulite[J].Bulletin of the Geological Society of America,86(2):227-236.
Cons table S C,Parker R L and Constable C.1987.Occam,s inversion:a practical algorithm for generating smooth models from electromagnetic sounding data[J].Geophysics,52(3):289-300.
Kenn ett B L N.1983.Seismic Wave Propagation in Atratified Media[M].New York:Cambridge University Press.
Lang ston C A.1979.Structure under Mount Rainier,Washington,inferred from teleseismic body waves[J].Journal of Geophysical Research,84:4749-4762.
Li Z W,Xu Y,Hao T Y,et al.2009.Vp and Vp/Vs structures in the crust and upper mantle of the Taiwan region,China[J].Science in China(Series D),52(7):975-983.
Liao Qilin,Wang Zhenming,Wang Pinglu,et al.1988.A research on the crust of Fuzhou-Quanzhou-Shantou region by explosion seismology[J].Chinese Journal of Geophysics,31(3):270-280.(in Chinese with English abstract)
Nian Weizhen.2008.Formation model of geothermal field and its relation with control structure in Zhangzhou[J].Safety and Environmental Engineering,15(4):30-33.(in Chinese with English abstract)
Rand all G E.1989.Efficient calculation of differential seismograms for lithospheric receiver functions[J].Geophysical Journal International,99(3):469-481.
Wu Qi ngju,Tian Xiaobo,Zhang Nailing,et al.2003.Receiverfunction estimated by maximum entropy deconvolution[J].ActaSeismologica Sinica,25(4):382-389.(in Chinese with Englishabstract)
Yang Xiaosong and Jin Zhenming.1998.The low velocity zone resulted from crustal partial melting and its significance[J].Progress in Geophysics,13(3):38-45.(in Chinese with English abstract)
Yang Xiaosong,Ma Jin and Zhang Xianjin.2003.Summarization of genesis of low-velocity layer in continental crust[J].Geological Science and Technology Information,22(1):35-41.(in Chinese with English abstract)
Yuan Liwen and Zheng Sihua.2009.Moho depths beneath broad-band stations in Fujian area inversed by teleseismic receiver function[J].South China Journal of Seismology,29(3):85-97.(in Chinese with English abstract)
Yuan Yusong,Ma Yongsheng,Hu Shengbiao,et al.2006.Present-day geothermal characteristics in south China[J].Chinese Journal of Geophysics,49(4):1118-1126.(in Chinese with English abstract)
Zhan g Huifang,Zhang Linyun,Lai Song,et al.1988.Study on the crustal and deep structure of Fuzhou-Shantou region[A].The Research and Progress of the Deep Structure of the Mainland of China[C].Beijing:Geological Publishing House.(in Chinese with English abstract)
Zhao Minghui,Qiu Xuelin,Xu Huilong,et al.2006.Crustal structure and its low-velocity layer in transition zone of South China[J].Journal of Tropical Oceanography,25(5):36-42.(in Chinese with English abstract)
Zhou Shuoyu,Shuai Ping,Guo Fengying,et al.2000.A quantitative research for present-time crustal motion in Fujian province,China and its marginal sea-synthetical analysis of GPS measurement,fault deformation survey,leveling and focal mechanism solution[J].Acta Seismologica Sinica,22(1):66-72.(in Chinese)
Zhou Shuoyu,Wu Yun,Qin Xiaoping,et al.2000.Study on the crustal horizontal movement in Fujian and its neighbouring sea region in1994to1997based on several kinds of GPS surveying data[J].Chinese Journal of Geophysics,43(4):471-479.(in Chinese withEnglish abstract)
Zhou X M and Li W X.2000.Origin of late Mesozoic igneous rocks in southeastern China:implications for lithosphere subduction and underplating of mafic magmas[J].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 tectonic evolution[J].Episodes,29(1):26-33.
Zhu L P and Kanamori H.2000.Moho depth variation in southern California from teleseismic receiver functions[J].Journal of Geophysical Research,105:2969-2980.
廖其林,王振明,王屏路,等.1988.福州—泉州—汕头地区地壳的爆炸地震研究[J].地球物理学报,31(3):270-280.
粘为振.2008.漳州地热田成因模式及其与控制构造的关系研究[J].安全与环境工程,15(4):30-33.
吴庆举,田小波,张乃铃,等.2003.计算台站接收函数的最大熵谱反褶积方法[J].地震学报,25(4):382-389.
杨晓松,金振民.1998.壳内部分熔融低速层及其研究意义[J].地球物理学进展,13(3):38-45.
杨晓松,马瑾,张先进.2003.大陆壳内低速层成因综述[J].地质科技情报,22(1):35-41.
袁丽文,郑斯华.2009.用远震接收函数反演福建地区宽频带台站下方莫霍界面深度[J].华南地震,29(3):85-97.
袁玉松,马永生,胡圣标,等.2006.中国南方现今地热特征[J].地球物理学报,49(4):1118-1126.
章惠芳,章林云,赖松,等.1988.泉州—汕头地区地壳结构和深部构造研究[A].中国大陆深部构造的研究与进展.北京:地质出版社.
赵明辉,丘学林,徐辉龙,等.2006.华南海陆过渡带的地壳结构与壳内低速层[J].热带海洋学报,25(5):36-42.
周硕愚,帅平,郭逢英,等.2000a.中国福建及其边缘海域现时地壳运动定量研究——GPS,断层形变和水准等测量与震源机制结果的综合分析[J].地震学报,22(1):66-72.
周硕愚,吴云,秦小平,等.2000b.基于多种GPS数据研究福建及其邻近海域1994—1997年地壳水平运动[J].地球物理学报,43(4):471-479.
Ai Y S,Zhao D P,Gao X,et al.2005.The crust and upper mantle discontinuity structure beneath Alaska inferred from receiver functions[J].Physics of the Earth and Planetary Interiors,150:339-350.
Ammo n C J,Randall G E and Zandt G.1990.On the nonuniqueness of receiver function inversions[J].Journal of Geophysical Research,95(B10):15303-15318.
Ammo n C J.1991.The isolation of receiver effects from teleseismic P waveforms[J].Bulletin of the Seismological Society of America,81(6):2504-2510.
Chen Yuantian,Xie Zhizhao,Wang Zhipeng,et al.2001.The latest tectonic motion and seismic risk in Zhangzhou basin,Fujian province[J].Seismology and Geology,23(4):556-563.(in Chinese with English abstract)
Chris tensen N I and Fountain D M.1975.Constitution of the lower continental crust based on experimental studies of seismic velocities in granulite[J].Bulletin of the Geological Society of America,86(2):227-236.
Cons table S C,Parker R L and Constable C.1987.Occam,s inversion:a practical algorithm for generating smooth models from electromagnetic sounding data[J].Geophysics,52(3):289-300.
Kenn ett B L N.1983.Seismic Wave Propagation in Atratified Media[M].New York:Cambridge University Press.
Lang ston C A.1979.Structure under Mount Rainier,Washington,inferred from teleseismic body waves[J].Journal of Geophysical Research,84:4749-4762.
Li Z W,Xu Y,Hao T Y,et al.2009.Vp and Vp/Vs structures in the crust and upper mantle of the Taiwan region,China[J].Science in China(Series D),52(7):975-983.
Liao Qilin,Wang Zhenming,Wang Pinglu,et al.1988.A research on the crust of Fuzhou-Quanzhou-Shantou region by explosion seismology[J].Chinese Journal of Geophysics,31(3):270-280.(in Chinese with English abstract)
Nian Weizhen.2008.Formation model of geothermal field and its relation with control structure in Zhangzhou[J].Safety and Environmental Engineering,15(4):30-33.(in Chinese with English abstract)
Rand all G E.1989.Efficient calculation of differential seismograms for lithospheric receiver functions[J].Geophysical Journal International,99(3):469-481.
Wu Qi ngju,Tian Xiaobo,Zhang Nailing,et al.2003.Receiverfunction estimated by maximum entropy deconvolution[J].ActaSeismologica Sinica,25(4):382-389.(in Chinese with Englishabstract)
Yang Xiaosong and Jin Zhenming.1998.The low velocity zone resulted from crustal partial melting and its significance[J].Progress in Geophysics,13(3):38-45.(in Chinese with English abstract)
Yang Xiaosong,Ma Jin and Zhang Xianjin.2003.Summarization of genesis of low-velocity layer in continental crust[J].Geological Science and Technology Information,22(1):35-41.(in Chinese with English abstract)
Yuan Liwen and Zheng Sihua.2009.Moho depths beneath broad-band stations in Fujian area inversed by teleseismic receiver function[J].South China Journal of Seismology,29(3):85-97.(in Chinese with English abstract)
Yuan Yusong,Ma Yongsheng,Hu Shengbiao,et al.2006.Present-day geothermal characteristics in south China[J].Chinese Journal of Geophysics,49(4):1118-1126.(in Chinese with English abstract)
Zhan g Huifang,Zhang Linyun,Lai Song,et al.1988.Study on the crustal and deep structure of Fuzhou-Shantou region[A].The Research and Progress of the Deep Structure of the Mainland of China[C].Beijing:Geological Publishing House.(in Chinese with English abstract)
Zhao Minghui,Qiu Xuelin,Xu Huilong,et al.2006.Crustal structure and its low-velocity layer in transition zone of South China[J].Journal of Tropical Oceanography,25(5):36-42.(in Chinese with English abstract)
Zhou Shuoyu,Shuai Ping,Guo Fengying,et al.2000.A quantitative research for present-time crustal motion in Fujian province,China and its marginal sea-synthetical analysis of GPS measurement,fault deformation survey,leveling and focal mechanism solution[J].Acta Seismologica Sinica,22(1):66-72.(in Chinese)
Zhou Shuoyu,Wu Yun,Qin Xiaoping,et al.2000.Study on the crustal horizontal movement in Fujian and its neighbouring sea region in1994to1997based on several kinds of GPS surveying data[J].Chinese Journal of Geophysics,43(4):471-479.(in Chinese withEnglish abstract)
Zhou X M and Li W X.2000.Origin of late Mesozoic igneous rocks in southeastern China:implications for lithosphere subduction and underplating of mafic magmas[J].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 tectonic evolution[J].Episodes,29(1):26-33.
Zhu L P and Kanamori H.2000.Moho depth variation in southern California from teleseismic receiver functions[J].Journal of Geophysical Research,105:2969-2980.
廖其林,王振明,王屏路,等.1988.福州—泉州—汕头地区地壳的爆炸地震研究[J].地球物理学报,31(3):270-280.
粘为振.2008.漳州地热田成因模式及其与控制构造的关系研究[J].安全与环境工程,15(4):30-33.
吴庆举,田小波,张乃铃,等.2003.计算台站接收函数的最大熵谱反褶积方法[J].地震学报,25(4):382-389.
杨晓松,金振民.1998.壳内部分熔融低速层及其研究意义[J].地球物理学进展,13(3):38-45.
杨晓松,马瑾,张先进.2003.大陆壳内低速层成因综述[J].地质科技情报,22(1):35-41.
袁丽文,郑斯华.2009.用远震接收函数反演福建地区宽频带台站下方莫霍界面深度[J].华南地震,29(3):85-97.
袁玉松,马永生,胡圣标,等.2006.中国南方现今地热特征[J].地球物理学报,49(4):1118-1126.
章惠芳,章林云,赖松,等.1988.泉州—汕头地区地壳结构和深部构造研究[A].中国大陆深部构造的研究与进展.北京:地质出版社.
赵明辉,丘学林,徐辉龙,等.2006.华南海陆过渡带的地壳结构与壳内低速层[J].热带海洋学报,25(5):36-42.
周硕愚,帅平,郭逢英,等.2000a.中国福建及其边缘海域现时地壳运动定量研究——GPS,断层形变和水准等测量与震源机制结果的综合分析[J].地震学报,22(1):66-72.
周硕愚,吴云,秦小平,等.2000b.基于多种GPS数据研究福建及其邻近海域1994—1997年地壳水平运动[J].地球物理学报,43(4):471-479.
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