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华南沿海地区地壳厚度与泊松比研究

DOI: 10.6038/cjg20141204, PP. 3896-3906

Keywords: 华南沿海,接收函数,地壳厚度,泊松比

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Abstract:

华南沿海地区地壳厚度和泊松比分布是了解该地区板块运动和地球内部物质结构的重要依据.本文利用广东台网和福建台网共75个固定地震台记录到的2001—2008年远震波形的接收函数,通过H-κ叠加法获得了74个台站下方平均地壳厚度和泊松比值的有效估计,结合该区断裂分布、地震活动和地形地貌特征,得出以下结论:(1)该区地壳厚度范围在26~32km之间,由陆向洋、自北向南减薄.泊松比0.23~0.28,由陆向洋增加,地壳厚度与泊松比变化分别和地表地形呈正相关和负相关;(2)地壳厚度和泊松比呈块状和带状分布,对应该区的断裂活动,其过渡带变化地区与地震分布一致,震群区和地幔上隆区对应泊松比的急剧增加;(3)该区主要以中、酸性地壳物质为主,地壳厚度与泊松比在近海区的构造伸展作用和褶皱区的逆冲推覆作用影响下,分别呈正、负消长关系,揭示该区不同时代和不同区域构造演化模式的差异.

References

[1]  Ammon C J. 1991. The isolation of receiver effects from teleseismic P-wave-forms. Bulletin of the Seismological Society of America, 81(6): 2504-2510.
[2]  Chevrot S, van der Hilst R D. 2000. The Poisson ratio of the Australian crust: geological and geophysical implications. Earth and Planetary Science Letters, 183(1-2): 121-132.
[3]  Christensen N I. 1996. Poisson''s ratio and crustal seismology. Journal of Geophysical Research: Solid Earth (1978—2012), 101(B2): 3139-3156.
[4]  Eccles J D, White R S, Christie P A F. 2011. The composition and structure of volcanic rifted continental margins in the North Atlantic: Further insight from shear waves. Tectonophysics, 508(1-4): 22-33.
[5]  Erduran M. 2009. Teleseismic inversion of crustal S-wave velocities beneath the Isparta Station. Journal of Geodynamics, 47(5): 225-236.
[6]  Gilder S A, Gill J, Coe R S, et al. 1996. Isotopic and paleomagnetic constraints on the Mesozoic tectonic evolution of south China. Journal of Geophysical Research: Solid Earth (1978-2012), 101(B7): 16137-16154.
[7]  Hao T Y, Liu J H, Song H B, et al. 2002. Geophysical evidences of some important faults in South China and adjacent marginal seas region. Progress in Geophysics (in Chinese), 17(1): 13-23.
[8]  Huang H B, Qiu X L, Xia S H. 2012. Crustal structure and Poisson''s ratio beneath Hainan Island. Journal of Tropical Oceanography (in Chinese), 31(3): 65-70.
[9]  Huang H B, Qiu X L, Xu Y, et al. 2011. Crustal structure beneath the Xisha Islands of the South China Sea simulated by the teleseismic receiver function method. Chinese J. Geophys. (in Chinese), 54(11): 2788-2798.
[10]  Ji S C, Wang Q, Salisbury M H. 2009. Composition and tectonic evolution of the Chinese continental crust constrained by Poisson''s ratio. Tectonophysics, 463(1-4): 15-30.
[11]  Ji S C, Wang Q, Yang W C. 2009. Correlation between crustal thickness and Poisson''s ratio in the north China craton and its implication for lithospheric thinning. Acta Geologica Sinica (in Chinese), 83(3): 324-329.
[12]  Langston C A. 1979. Structure under Mount Rainier, Washington, Inferred from Teleseismic Body Waves. Journal of Geophysical Research: Solid Earth (1978—2012), 84(B9): 4749-4762.
[13]  Liu Q Y, He L J, Huang F. 2013. Review of Mesozoic geodynamics research of South China. Progress in Geophysics, 28(2): 633-647.
[14]  Ranalli G, Murphy D C. 1987. Rheological stratification of the lithosphere. Tectonophysics, 132(4): 281-295.
[15]  Ren Z H, Luo Z N. 1998. A new study on the devision of the seismic belts in the South China seismic area. South China Journal of Seismology (in Chinese), 18(2): 10-15.
[16]  Ren Z H, Luo Z N, Qin N G. 1998. Restudy on the basic characteristics of seismicity and general situation for South China seismic zone. South China Journal of Seismology (in Chinese), 18(1): 40-49.
[17]  Shu L S. 2012. An analysis of principal features of tectonic evolution in South China Block. Geological Bulletin of China (in Chinese), 31(7): 1035-1053.
[18]  Sun Y, Niu F L, Liu H F, et al. 2012. Crustal structure and deformation of the SE Tibetan plateau revealed by receiver function data. Earth and Planetary Science Letters, 349-350: 186-197.
[19]  Xu X B, Zhang Y Q, Jia D, et al. 2009. Early Mesozoic geotectonic processes in South China. Geology in China (in Chinese), 36(3): 573-593.
[20]  Yuan H Y, Dueker K, Stachnik J. 2010. Crustal structure and thickness along the Yellowstone hot spot track: Evidence for lower crustal outflow from beneath the eastern Snake River Plain. Geochemistry, Geophysics, Geosystems, 11(3): doi:10.1029/2009GC002787.
[21]  Zandt G, Ammon C J. 1995. Continental-crust composition constrained by measurements of crustal poissons ratio. Nature, 374(6518): 152-154.
[22]  Zhang H N, Wu Q H. 1994. A comparative study of main active fault zones along the coast of South China. Seismology and Geology (in Chinese), 16(1): 43-52.
[23]  Zhang Z J, Yang L Q, Teng J W, et al. 2011. An overview of the earth crust under China. Earth-Science Reviews, 104(1-3): 143-166.
[24]  Zheng Q S, Zhu J S, Xuan R Q, et al. 2003. An approach to the crustal velocities in southern China. Sedimentary Geology and Tethyan Geology (in Chinese), 23(4): 9-13.
[25]  Zhu L P, Kanamori H. 2000. Moho depth variation in southern California from teleseismic receiver functions. Journal of Geophysical Research: Solid Earth (1978—2012), 105(B2): 2969-2980.
[26]  Buland R, Chapman C H. 1983. The computation of seismic travel times. Bulletin of the Geological Society of America, 73(5): 1271-1302.
[27]  Cai X L, Zhu J S, Cao J M, et al. 2003. Three-dimensional tectonic types and evolutional dynamics of lithosphere of South China region. Geotectonica et Metallogenia (in Chinese), 27(4): 301-312.
[28]  Chen J H. 2007. Teleseismic receiver function: Theory and applications [Ph. D. thesis]. Beijing: China Seismological Bureau of Geological Research Institute.
[29]  Qiu X L, Ye S Y, Wu S M, et al. 2001. Crustal structure across the Xisha trough, northwestern South China Sea. Tectonophysics, 341(1-4): 179-193.
[30]  Qiu X L, Zhao M H, Ao W, et al. 2011. OBS survey and crustal structure of the Southwest Sub- basin and Nansha Block, South China Sea. Chinese J. Geophys. (in Chinese), 54(12): 3117-3128.
[31]  Ruan A G, Niu X W, Qiu X L, et al. 2011. A wide angle Ocean Bottom Seismometer profile across Liyue Bank, the southern margin of South China Sea. Chinese J. Geophys. (in Chinese), 54(12): 3139-3149.
[32]  Seber G A F, Lee A J. 2003. Linear Regression Analysis. New Jersey: Wiley-Interscience.
[33]  Smith W H F, Wessel P. 1990. Gridding with Continuous Curvature Splines in Tension. Geophysics, 55(3): 293-305.
[34]  Wu H H, Tsai Y B, Lee T Y, et al. 2004. 3-D shear wave velocity structure of the crust and upper mantle in South China Sea and its surrounding regions by surface wave dispersion analysis. Marine Geophysical Researches, 25(1-2): 5-27.
[35]  Xiong X S, Gao R, Li Q S, et al. 2009. The Moho depth of South China revealed by seismic probing. Acta Geoscientica Sinica (in Chinese), 30(6): 774-786.

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