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Complicated phenomena of the Beichuan-Yingxiu surface fracture zone during Wenchuan Ms8.0 earthquake in Sichuan Province, China

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Chinese Science Bulletin

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Abstract

After Wenchuan Ms8.0 earthquake, the surface fractures have been investigated in Beichuan City and Yingxiu Town. It was found that the Beichuan-Yingxiu earthquake fracture zone trends northeastward, dip** to northwest. The earthquake fracture zone is mainly characterized by thrust faulting with small amounts of strike-slip movement, and demonstrating various complexities for different areas. The phenomena related to dextral strike-slip displacement are found in Beichuan City and those related to left-lateral strike-slip movement in Yingxiu Town. The compressive shortening of the two surface fracture zones in Beichuan City is 2.8–3.9 m and the left-lateral strike-slip displacement of the surface fractures in Yingxiu Town is 0.52 m.

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Correspondence to ZhiHui Deng.

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Supported by National Natural Science Foundation of China (Grant Nos. 40841016, 40372131 and 40702056), Dedicated Program as a Basic Scientific Research of Central Public Welfare Institute (Grant No. 2060302) and the National Science & Technology Pillar Program (Grant No. 2006BAC01B03-02-03)

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Deng, Z., Yang, Z., Sun, Z. et al. Complicated phenomena of the Beichuan-Yingxiu surface fracture zone during Wenchuan Ms8.0 earthquake in Sichuan Province, China. Chin. Sci. Bull. 53, 3891–3896 (2008). https://doi.org/10.1007/s11434-008-0473-4

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  • DOI: https://doi.org/10.1007/s11434-008-0473-4

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