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Volume 18 Issue 3
Jun 2007
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Article Contents
Wenbo Wei, Gaofeng Ye, Yanjun Li, Sheng Jin, Ming Deng, Jian'en Jing. Three-Dimensional P-Wave Velocity Structure of the Crust of North China. Journal of Earth Science, 2007, 18(3): 257-268.
Citation: Wenbo Wei, Gaofeng Ye, Yanjun Li, Sheng Jin, Ming Deng, Jian'en Jing. Three-Dimensional P-Wave Velocity Structure of the Crust of North China. Journal of Earth Science, 2007, 18(3): 257-268.

Three-Dimensional P-Wave Velocity Structure of the Crust of North China

Funds:

the National Natural Science Foundation of China 40434010

the Focused Subject Program of Beijing XK104910589

More Information
  • Corresponding author: Wei Wenbo, wwb5130@cugb.edu.cn
  • Received Date: 20 Mar 2007
  • Accepted Date: 22 Jun 2007
  • Since the Xingtai (邢台) earthquake in 1966, China Earthquake Administration has carried out a survey campaign along more than thirty deep seismic sounding (DSS) profiles altogether about twenty thousand kilometers long in North China to study the velocity structure of the crust and the upper mantle in this region, and has obtained a great number of research findings. However, these researches have not provided a 3D velocity structure model of the crust of North China and cannot provide seismic evidence for the study of the deep tectonic characteristics of the crust of the whole region. Hence, based on the information from the published data of the DSS profiles, we have chosen 14 profiles to obtain a 3D velocity structure model of North China using the vectorization function of the GIS software (Arc/Info) and the Kriging data gridding method. With this velocity structure model, we have drawn the following conclusions: (1) The P-wave velocity of the uppermost crust of North China changes dramatically, exhibiting a complicated velocity structure in plane view. It can be divided into three velocity zones mainly trending towards north-west. In the research area, the lowest-velocity zones lie in the Haihe (海河) plain and Bohai (渤海) Bay. Although the geological structure of the sedimentary overburden in the study area is somewhat inherited by the upper crust, there are still several differences between them. (2) Generally, the P-wave velocity of the crust increases with depth in the study area, but there still exists local velocity reversion. In the east, low-velocity anomalies of the Haihe plain gradually disappear with increasing depth, and the Shanxi (山西) graben in the west is mainly characterized by relatively low velocity anomalies. Bounded by the Taihang (太行) Mountains, the eastern and western parts differ in structural trend of stratum above the crystalline basement. The structural trend of the Huanghuaihai (黄淮海) block in the east is mainly north-east, while that of the Shanxi block and the eastern edge of the Ordos block is mainly north-west. (3) According to the morphological features of Moho, the crust of the study area can be divided into six blocks. In the Shanxi block, Moho apppears like a nearly south-north trending depression belt with a large crustal thickness. In the southern edge of the Inner Mongolia block and the south of the Yanshan (燕山) block, the Moho exhibits a feature of fold belt, trending nearly towards east-west. In the eastern edge of the Ordos block, the structure of Moho is relatively complex, presenting a pattern of fold trending nearly towards north-west with alternating convexes and concaves. Beneath the Huanghuaihai block, the middle and northern parts of the North China rift zone, the Moho is the shallowest in the entire region, with alternating uplifts and depressions in its shape. For the anteclise zone in the west of Shandong (山东) Province, the Moho is discontinuous for the fault depression extending in the north-west direction along Zaozhuang (枣庄) -Qufu (曲阜).

     

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  • Fan, H., 1999. The Developmental Technique and Application of Arc/Info. University of Science and Technology of Surveying and Drawing in Wuhan Press, Wuhan. 45–57 (in Chinese)
    Jia, S. X., Liu, C. Q., 1991. Interpretation of Heze-Changzhi DSS Profile in South of the Basin in North China. North China Earthquake Sciences, 9(2): 11–20 (in Chinese) http://en.cnki.com.cn/Article_en/CJFDTOTAL-HDKD199102001.htm
    Liu, C. Q., Fang, S. M., Li, C. F., 1996. Joint Gravity-Seismic Interpretation for Yingxian-Zibo Profile. Seismology and Geology, 18(4): 369–374 (in Chinese with English Abstract) http://en.cnki.com.cn/Article_en/CJFDTOTAL-DZDZ604.011.htm
    Liu, C. Q., Jia, S. X., Li, C. F., et al., 1997. Deep Structure Background of 1966 Xingtai M=6.8 Earthquake. North China Earthquake Sciences, 15(2): 17–23 (in Chinese) http://en.cnki.com.cn/Article_en/CJFDTOTAL-HDKD199702002.htm
    Ren, Q. F., Zhang, C. K., Zhao, J. R., et al., 1992. Characteristics of Crustal Structures in Heze Region and Earthquakes. North China Earthquake Sciences, 10(3): 45–52 (in Chinese) http://en.cnki.com.cn/Article_en/CJFDTOTAL-HDKD199203005.htm
    Wang, C. Y., Zhang, X. K., Wu, Q. J., et al., 1994. The Seismological Evidence of the Slip Structure in the Basin in North China. Acta Geophysica Sinica, 37(5): 613–619 (in Chinese with English Abstract)
    Wang, J. H., Gao, H. Y., Zhou, Y., 1999. Kriging Geological Mapping Technique—Models and Algorithms on Computers. Petroleum Industry Press, Beijing. 73–77 (in Chinese)
    Yuan, Z. X., Ding, Y. Y., Di, X. L., 1999. The S Wave Velocity Image of the Crust in Weihe Fault Subsidence and Near Area. Seismology and Geology, 21(1): 9–16 (in Chinese with English Abstract)
    Zhang, C. K., Zhang, X. K., Gai, Y. J., et al., 1997. A Study of Crust and Upper Mantle Structure on Wenan-Yuxian-Qaharyouyizhongqi Profile. North China Earthquake Sciences, 15(3): 18–28 (in Chinese)
    Zhang, J. S., Zhu, Z. P., Zhang, X. K., et al., 1997. The Seismic Velocity Structure of Crust and Upper Mantle and Deep Structure Feature in North Shanxi Plateau. Seismology and Geology, 19(3): 220–226 (in Chinese with English Abstract) https://en.cnki.com.cn/Article_en/CJFDTOTAL-HNDI199203000.htm
    Zhu, Z. P., Zhang, J. S., Zhang, C. K., et al., 1999. Study on the Structure of the Crust and Mantle in Centre and South of Shanxi. Acta Seismologica Sinica, 21(1): 42–49 (in Chinese with English Abstract)
    Zhu, Z. P., Zhang, J. S., Zhou, X. S., et al., 1994. Study on the Structure of the Crust and Upper Mantle in Linfen Earthquake Region in Shanxi. North China Earthquake Sciences, 12(1): 77–83 (in Chinese)
    Zhu, Z. P., Zhang, X. K., Gai, Y. J., et al., 1995. Study on the Seismic Velocity Structure of the Crust and Upper Mantle in Xingtai Earthquake Region and Near Area. Acta Seismologica Sinica, 17(3): 328–334 (in Chinese with English Abstract)
    Zhu, Z. P., Zhang, X. K., Zhang, J. S., et al., 1997. Study on the Seismic Velocity Structure of the Crust and Upper Mantle on Beijing-Huailai-Fengzhen Profile. Acta Seismologica Sinica, 19(5): 499–505 (in Chinese with English Abstract)
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