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中国大陆东南缘地震接收函数与地壳和上地幔结构

DOI: 10.6038/cjg20130909, PP. 2947-2958

Keywords: 中国大陆东南缘,远震P波接收函数,Moho,泊松比,闽江断裂,上地幔转换带,菲律宾板块,欧亚板块

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Abstract:

从2008—2011年,分别在中国大陆东南缘沿海和内陆两条NE向剖面上进行了宽频地震观测,利用记录到的远震波形资料提取得到1446个远震P波接收函数,用H-κ叠加扫描和CCP偏移叠加方法研究了中国大陆东南缘地壳及上地幔过渡带的结构及其变化特征.结合固定台网25个台站的H-κ结果,获得中国大陆东南缘(福建地区)地壳厚度从内陆到沿海逐渐减薄的图像:地壳从闽西北山区的33km减薄到厦门沿海一带的29km以下,平均地壳厚度为31.3km,具有陆地向洋壳过渡的特征;地壳泊松比从内陆到沿海显示出分带特征,闽中西部内陆地区小于0.26,沿海地带高于0.26,且在断裂带的交汇区域表现为相对异常高值.地壳上地幔顶部(0~200km)的CCP偏移叠加成像结果显示闽江断裂等NW向断裂深切Moho界面,在断裂两侧Moho面急剧抬升或下沉,产状改变,这些特征向内陆地区逐渐变得不明显.闽江等NW向断裂对研究区地壳厚度、地震等有明显控制作用.上地幔尺度(300~700km)的CCP偏移叠加成像,未见410km和660km速度间断面突变和起伏异常,其绝对深度略大于IASP91模型的,上地幔转换带厚度正常(250±5km),表明中国大陆东南缘上地幔转换带未受欧亚与菲律宾板块碰撞的明显影响,推断中国大陆东南缘及台湾海峡下方不存在俯冲板块,或俯冲前缘未扰动到410km的深度.

References

[1]  Zhu J F, Xu X W, Zhang X K, et al. Joint exploration of crustal structure in Fuzhou basin and its vicinities by deep seismic reflection and high-resolution refraction as well as wide-angle reflection/refraction. Science in China (Ser. D: Earth Sciences), 2005, 48(7): 925-938.
[2]  Zhu J F, Fang S M, Zhang X K, et al. Exploration and research of deep crustal structures in the Zhangzhou basin and its vicinity. Earthquake Research in China, 2006, 20(4): 412-425.
[3]  Zhang Z J, Teng J W, Badal J, et al. Construction of regional and local seismic anisotropic structures from wide-angle seismic data: crustal deformation in the southeast of China. Journal of Seismology, 2009, 13(2): 241-252.
[4]  Zhang Z J, Xu T, Zhao B, et al. Systematic variations in seismic velocity and reflection in the crust of Cathaysia: New constraints on intraplate orogeny in the South China continent. Gondwana Research, 2012, doi: 10.1016/j.gr.2012.05.018.
[5]  Yuan X H, Ni J, Kind R, et al. Lithospheric and upper mantle structure of southern Tibet from a seismological passive source experiment. Journal of Geophysical Research, 1997, 102(B12): 27491-27500.
[6]  Kikuchi M, Kanamori H. Inversion of complex body waves. Bulletin of the Seismological Society of America, 1982, 72(2): 491-506.
[7]  Zhu L P, Kanamori H. Moho depth variation in southern California from teleseismic receiver functions. Journal of Geophysical Research, 2000, 105(B2): 2969-2980.
[8]  Zhu L P. Crustal structure across the San Andreas Fault, southern California from teleseismic converted waves. Earth and Planetary Science Letters, 2000, 179(1): 183-190.
[9]  Zhu L P. Deformation in the lower crust and downward extent of the San Andreas Fault as revealed by teleseismic waveforms. Earth Planets Space, 2002, 54(11): 1005-1010.
[10]  Ji S C, Wang Q, Salisbury M H. Composition and tectonic evolution of the Chinese continental crust constrained by Poisson''s ratio. Tectonophysics, 2009, 463(1-4): 15-30.
[11]  周硕愚, 吴云, 施顺英等. 中国大陆东南边缘海现时地壳运动与地震动力学综合研究. 地壳形变与地震, 2001, 21(1): 1-14. Zhou S Y, Wu Y, Shi S Y, et al. Integrated research on current crustal movement and earthquake dynamics in marginal sea, Southeast of China continent. Crustal Deformation and Earthquake (in Chinese), 2001, 21(1): 1-14.
[12]  Kennett B L N, Engdahl E R. Traveltimes for global earthquake location and phase identification. Geophysical Journal International, 1991, 105(2): 429-465.
[13]  Shearer P M. Transition zone velocity gradients and the 520 km discontinuity. Journal of Geophysical Research, 1996, 101(B2): 3053-3066.
[14]  Li Q S, Gao R, Wu F T, et al. New observation results of the crust and upper mantle seismic structure in the southeastern China using teleseismic receiver functions. Tectonophysics, 2013.
[15]  Zhou X M, Li W X. Origin of Late Mesozoic igneous rocks in Southeastern China: implications for lithosphere subduction and underplating of mafic magmas. Tectonophysics, 2000, 326(3-4): 269-287.
[16]  张路, 曲国胜, 朱金芳等. 福建沿海盆地第四纪构造运动模式与动力学环境. 地质通报, 2007, 26(3): 275-288. Zhang L, Qu G S, Zhu J F, et al. Model of Quaternary tectonic movement and dynamic setting of basins along the coast of Fujian, China. Geological Bulletin of China (in Chinese), 2007, 26(3): 275-288. 张虎男. 福建长乐—诏安断裂带的新构造运动. 地质学报, 1987, (3): 231-239. Zhang H N. Characteristics of the neotectonic movement of the Changle-Zhao''an Fault belt in Fujian. Acta Geologica Sinica (in Chinese), 1987, (3): 231-239.
[17]  Bina C R, Helffrich G R. Phase transition Clapeyron slopes and transition zone seismic discontinuity topography. Journal of Geophysical Research, 1994, 99(B8): 15853-15860.
[18]  廖其林, 王振明, 王屏路等. 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, 1988, 31(3): 270-280. Liao Q L, Wang Z M, Wang P L, et al. Explosion seismic study of the crustal structure in Fuzhou-Quanzhou-Shantou region. Chinese J. Geophys. (in Chinese), 1988, 31(3): 270-280.
[19]  廖其林, 王振明, 丘陶兴等. 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, 1990, 33(2): 163-173. Liao Q L, Wang Z M, Qiu T X, et al. Preliminary research of the crustal structure in Fuzhou basin and its adjacent area. Chinese J. Geophys. (in Chinese), 1990, 33(2): 163-173.
[20]  章慧芳. 中国东南沿海地区泉汕爆破深地震测深资料的再解释. 中国地震, 1988, 4(2): 96-105. Zhang H F. Explanation for data of DSS profiles at Quan-Shan area in the coast of Southeast China. Earthquake Research in China (in Chinese), 1988, 4(2): 96-105.
[21]  丘陶兴, 廖其林, 王振明等. 福建沿海地区地壳S波速度结构和泊松比分布特征. 华南地震, 1991, 11(2): 23-30. Qiu T X, Liao Q L, Wang Z M, et al. The S wave velocity structure and Poisson''s ratio distribution characteristic in Fujian coastal area. South China Journal of Seismology (in Chinese), 1991, 11(2): 23-30.
[22]  熊绍柏, 金东敏, 孙克忠等. 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, 1991, 34(1): 55-63. Xiong S B, Jin D M, Sun K Z, et al. Some characteristics of deep structure of the Zhangzhou geothermal field and it''s neighbourhood in the Fujian Province. Chinese J. Geophys. (in Chinese), 1991, 34(1): 55-63.
[23]  袁学诚. 阿尔泰—台湾地学断面论文集. 武汉: 中国地质大学出版社, 1997. Yuan X C. Memoirs of the Geoscience Transection for the Continental Lithosphere Beneath Altay-Taiwan, China (in Chinese). Wuhan: China University of Geosciences Press, 1997.
[24]  王椿镛, 林中洋, 陈学波. 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, 1995, 38(5): 590-598. Wang C Y, Lin Z Y, Chen X B. Comprehensive study of geophysics on geoscience transect from Menyuan, Qinghai Province, to Ningde, Fujian Province, China. Chinese J. Geophys. (in Chinese), 1995, 38(5): 590-598.
[25]  Zhang Z J, Badal J, Li Y K, et al. Crust-upper mantle seismic velocity structure across Southeastern China. Tectonophysics, 2005, 395(1-2): 137-157.
[26]  Zhang Z J, Zhang X, Badal J. Composition of the crust beneath southeastern China derived from an integrated geophysical data set. Journal of Geophysical Research, 2008, 113(B4): B04417, doi: 10. 1029/2006JB004503.
[27]  Ai Y S, Cheng Q F, Zeng F, et al. The crust and upper mantle structure beneath southeastern China. Earth and Planetary Science Letters, 2007, 260(3-4): 549-563.
[28]  袁丽文, 郑斯华. 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. 华南地震, 2009, 29(3): 85-97. Yuan L W, Zheng S H. Moho depths beneath broad-band stations in Fujian area inversed by teleseismic receiver Function. South China Journal of Seismology (in Chinese), 2009, 29(3): 85-97.
[29]  黄晖, 米宁, 徐鸣洁等. 福建地区地壳上地幔S波速度结构与泊松比. 高校地质学报, 2010, 16(4): 465-474. Huang H, Mi N, Xu M J, et al. S-wave velocity structures of the crust and uppermost mantle, and Poisson''s ratios in Fujian Province. Geological Journal of China Universities (in Chinese), 2010, 16(4): 465-474.
[30]  Huang Z C, Wang L S, Zhao D P, et al. Upper mantle structure and dynamics beneath Southeast China. Physics of the Earth and Planetary Interiors, 2010, 182(3-4): 161-169.
[31]  Zheng H W, Gao R, Li T D, et al. Collisional tectonics between the Eurasian and Philippine Sea plates from tomography evidences in Southeast China. Tectonophysics, 2013.
[32]  Ligorria J P, Ammon C J. Iterative deconvolution and receiver-function estimation. Bulletin of the Seismological Society of America, 1999, 89(5): 1395-1400.
[33]  Zhu L P. Lateral variation of the Tibetan lithospheric structure inferred from teleseismic waveforms. // Chen Y T, Teng J W, Kan R J, et al eds. Advancements in Seismology and Physics of the Earth Interior in China. Beijing: Seismological Press, 2004: 295-310.
[34]  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. 地质学报, 2009, 83(3): 324-330. Ji S C, Wang Q, Yang W C. Correlation between crustal thickness and Poisson''s ratio in the North China Craton and its implication for lithospheric thinning. Acta Geologica Sinica (in Chinese), 2009, 83(3): 324-330.
[35]  杨文采, 瞿辰, 于长青. 华北东部地区地壳泊松比异常及其成因. 地学前缘, 2011, 18(3): 13-21. Yang W C, Qu C, Yu C Q. High Poisson''s ratio anomalies in the crust of the eastern part of North China and its origin. Earth Science Frontiers (in Chinese), 2011, 18(3): 13-21.
[36]  邵学钟, 顾忠华, 张家茹. 福州地区地壳结构的地震转换波测深研究. 地震地质, 1993, 15(2): 174-180. Shao X Z, Gu Z H, Zhang J R. Investigation of crust structure in Fuzhou area by means of converted waves of earthquakes. Seismology and Geology (in Chinese), 1993, 15(2): 174-180.
[37]  陈宗基, 孔祥儒, 刘云龙. 福建地热地球物理研究. 北京: 中国科学技术出版社, 1992. Chen Z J, Kong X R, Liu Y L. The Studies on Geothermal Geophysics in Fujian Province (in Chinese). Beijing: Science & Technology Press of China, 1992.
[38]  张季生, 高锐, 李秋生等. 台湾海峡及邻区地球物理特征及地壳密度结构. 地质论评, 2008, 54(5): 694-698. Zhang J S, Gao R, Li Q S, et al. Geophysical characteristic and density structure of crust in Taiwan Strait and neighboring area. Geological Review (in Chinese), 2008, 54(5): 694-698.
[39]  Zhou X M, Sun T, Shen W Z, et al. Petrogenesis of Mesozoic granitoids and volcanic rocks in South China: A response to tectonic evolution. Episodes, 2006, 29(1): 26-33.
[40]  Wan T F, Zhao Q L. The genesis of tectono-magmatism in eastern China. Science in China Earth Sciences, 2012, 55(3): 347-354.

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