Abstract
Eastern China and vicinal sea areas (98°–150°E, 5°–50°N) are located in the junction zone of Eurasian and Pacific plates, and it is also profoundly influenced by the collision between Indian and Eurasian plates. We utilized surface wave data recorded by 35 digital seismic stations in the area, extracted dispersion curves of fundamental-mode Rayleigh waves along 1 252 paths by means of time-frequency analysis based on multiple-filter and other techniques. The study area was divided into a grid of 1°×1°, group velocity distributions of fundamental Rayleigh waves between 10–158 s were determined by Occam’s inversion. These velocity distributions roughly depict the lateral variations of shear wave velocities in different depth ranges. With the determined pure path dispersions we further inverted for the S wave velocity structures along two profiles from eastern Tibet to Pacific Ocean and from South China Sea to Mongolia. It is found that the lateral heterogeneity is obvious down to 400 km depth, and the velocity structures are correlated with tectonic units in the study area.
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CHEN Guo-ying, SONG Zhong-he, AN Chang-qiang,et al. 1991. 3D crust and upper mantle structure of North China [J].Chinese J Geophys,34(2): 172–181 (in Chinese).
Curtis A, Trampert J, Snieder R. 1998. Eurasian fundamental mode surface wave phase velocities and their relationship with tectonic structures [J].J Geophys Res,103(B11): 26 919–26 947.
FENG Rui, ZHU Jie-shou, DING Yun-yu,et al. 1981. Crustal structure in China by surface wave [J].Acta Seismologica Sinica,3(4): 335–350 (in Chinese).
HUANG Zhong-xian, ZHENG Yue-jun. 1998. Occam’s inversion of surface wave velocities [A]. In: CHEN Yong, WANG Shui, QIN Yun-shan,et al. eds.Collected Papers in Commemoration of 50 Year’s Work of Academician LIU Guangding [C]. Beijing: Science Press, 692–704 (in Chinese).
Lebedev S, Nolet G, van der Hilst R D. 1997. The upper mantle beneath the Philippine Sea region from waveform inversions [J].Geophys Res Lett,24(15): 1 851–1 854.
Lebedev S, Nolet G. 2001. The upper mantle beneath SE Asia, II: Structure and evolution [J].J Geophys Res (in press).
LIU Fu-tian, LI Qiang, LIU Jian-hua,et al. 1989. Seismic tomography of the Chinese continent and adjacent region [A]. In: Editorial Board ofChinese Journal of Geophysics eds.Geophysics in China in the Eighties—In Commemoration of the 80th Birthday of Professor FU Chengyi [C]. Beijing: Academic Press, 260–274 (in Chinese).
MA Xing-yuan ed. 1989.Lithospheric Dynamics Atlas of China [M]. Beijing: China Cartographic Publishing House, 68 (in Chinese).
Ritzwoller M H, Levshin A L. 1998. Eurasian surface wave tomography: Group velocities [J].J Geophy Res,103(B3): 4 839–4 878.
SONG Zhong-he, TAN Cheng-ye. 1965. Crustal thickness in China by Rayleigh and Love wave group velocity data [J].Chinese J Geophys,14(1): 33–44 (in Chinese).
SONG Zhong-he, CHEN Guo-ying, AN Chang-qiang,et al. 1993. 3D velocity structure of crust and upper mantle of China continent and adjacent seas [J].Science in China (series B),23(2): 180–188 (in Chinese).
SUN Ke-zhong, FENG Rui, YAO Zheng-sheng,et al. 1990. Lithospheric structure in the Tibet-Japan profile [J].Acta Seismologica Sinica,3(2): 190–198.
Wier S. 1982. Surface wave dispersion and Earth structure in southeastern China [J].Geophys J R astr Soc,69: 33–47.
Wu F T, Levshin A L, Kozhevnikov V M. 1997. Rayleigh wave group velocity tomography of Siberia, China and the vicinity [J].Pure Appl Geophys,149: 447–473.
ZENG Rong-sheng, SONG Zi-an. 1963. Phase velocities of Rayleigh waves in China [J].Chinese J Geophys,12(2): 148–165 (in Chinese).
ZHANG Wen-you ed-in-chief. 1986.Geotectonics of Seas and Continent of China and Adjacent Regions [M]. Beijing: Science Press, 305–306 (in Chinese).
ZHU Jie-shou, CAO Jia-min, LI Xian-gui,et al. 1997. A preliminary model of 3-D Earth structure of China and adjacent regions [J].Chinese J Geophys,40(5): 627–648 (in Chinese).
ZHU Liang-bao, XU Qing, CHEN Xiao-fei. 2001. The application of conformal transformation in regional surface wave group velocity inversion [J].Chinese J Geophys,44(1): 64–71 (in Chinese).
XU Guo-ming, LI Guang-pin, WANG Shan-en,et al. 2000. Inversion of Rayleigh wave data for 3-dimensional S-wave structure of crust and upper mantle in eastern China [J].Chinese J Geophys,43(3): 366–376 (in Chinese).
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Foundation item: State Hi-Tech Development Project (8200104) and Natural Science Foundation of China (49874008).
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Li, Hy., Liu, Ft., Sun, Rm. et al. Crust and upper mantle structure in east China and sea areas. Acta Seimol. Sin. 14, 503–511 (2001). https://doi.org/10.1007/BF02718057
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DOI: https://doi.org/10.1007/BF02718057