• Tectonic stress accumulation in Bohai–Zhangjiakou Seismotectonic Zone based on 3D visco-elastic modelling

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      https://www.ias.ac.in/article/fulltext/jess/125/05/1021-1031

    • Keywords

       

      Bohai–Zhangjiakou Seismotectonic Zone; tectonic stress accumulation; visco-elastic modelling; Moho surface; modern tectonic stress field

    • Abstract

       

      Future earthquake potential in the Bohai–Zhangjiakou Seismotectonic Zone (BZSZ) in North Chinadeserves close attention. Tectonic stress accumulation state is an important indicator for earthquakes;therefore, this study aims to analyse the stress accumulation state in the BZSZ via three-dimensionalvisco-elastic numerical modelling. The results reveal that the maximum shear stress in the BZSZ increasesgradually as the depth increases, and the stress range is wider in the lower layer. In the upper layer, themaximum shear stress is high in the Zhangjiakou area, whereas in the lower layer, relatively high valuesoccur in the Penglai–Yantai area, which may be affected by the depth of the Moho surface. Besides,weak fault zones will be easily fractured when the maximum shear stress is not sufficiently high due totheir low strengths, resulting in earthquakes. Therefore, based on the modelling results, the upper layerof the Zhangjiakou area and the lower layer of the Penglai–Yantai area in the BZSZ in North China aremore likely to experience earthquakes.

    • Author Affiliations

       

      Ju Wei1 Sun Weifeng1 Ma Xiaojing2 3 Jiang Hui3

      1. School of Resources and Geoscience, China University of Mining and Technology, Xuzhou 221116, China.
      2. College of Resources, Shijiazhuang University of Economics, Shijiazhuang 050031, China.
      3. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China.
    • Dates

       
  • Journal of Earth System Science | News

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