The geological structure of Yinchuan Plain is a Cenozoic fault basin, which belongs to the western marginal zone of Ordos block, and is sandwiched between the Helanshan uplift belt and the Taole-Hengshanbao thrust belt. It is also subjected to the east-west tensile stress of the Ordos block and the northeastward compression stress of the Alxa micro-continent, which forms complex geological structural features of this area. As an important part of the Tibetan block, the Ordos block and the Alxa block, and the important component of the north-south seismic belt, the Yinchuan fault basin has become one of the more active boundary structures in China’s mainland, and had many strong earthquakes in history. In order to interpret the deep geological structure of the Yinchuan fault basin, the authors employed 1∶200,000 regional gravity data, drilling data, seismic section, and magnetotelluric profile data as constraints to perform 2.5D human-computer interaction inversion in Yinchuan Plain. Based on this result, a deep 3D geological model of the Yinchuan Plain was constructed, which laid a solid foundation for regional stability evaluation, exploration and development of geothermal resources.
陈晓晶, 虎新军, 李宁生, 安百州, 白亚东. 银川平原基于地球物理资料三维建模的深部地质构造研究[J]. 物探与化探, 2020, 44(2): 245-253.
Xiao-Jing CHEN, Xin-Jun HU, Ning-Sheng LI, Bai-Zhou AN, Ya-Dong BAI. Research on the deep geological structure in Yinchuan Plain: 3D modeling based on geophysical data. Geophysical and Geochemical Exploration, 2020, 44(2): 245-253.
Liu B J, Feng S Y, Ji J F , et al. Lithospheric structure and faulting characteristics of the Helan Mountains and Yinchuan basin: Results of deep seismic reflection profiling[J]. Science China: Earth Sciences, 2017,47(2):179-190.
Li Y, Liu J B, Feng S Y , et al. Exploration of shallow structure and buried faults in the Yinchuan basin using seismic refraction and reflection data[J]. Chinese Journal of Geophysics, 2017,60(8):3096-3109.