Qualitative and quantitative interpretation of fracture system in Yinchuan plain based on gravity data
Cheng LIU1, Yu-Shan YANG1(), Tian-You LIU1, Dan ZHU1, Bai-Zhou AN2
1. Institute of Geophysics and Geomatic,China University of Geosciences,Wuhan 430074,China 2. Ningxia Geophysical and Geochemical Exploration Institute,Yinchuan 750004,China
The Yinchuan plain is a region of active faults which are closely related to earthquake disasters. The study of active faults in the Yinchuan plain is of great significance for the development of the city. In this paper, the gravity anomaly characteristics of the area are analyzed and the fracture system is divided by the method of gravity boundary recognition based on the re-processing of 1∶200 000 Bouguergravity anomaly data of the Yinchuan plain. The quantitative inversion of the 83503 line section of the study area is carried out by using the method of fracture parametric graph, the Euler homogeneous equation, the optimal inversion and the 2.5D inversion. The inversion results and the seismic interpretation are coincident. Using the existing gravity data, the authors probed into the method of interpreting the plane fracture system and the quantitative inversion of the section fracture and, as a result, some new understanding was obtained such as the north extension of the Yinchuan fault and westward migration of a part of Yellow River fault. The result provides a new reference for the research on active faults.
刘城, 杨宇山, 刘天佑, 朱丹, 安百州. 根据重力资料定性与定量解释银川平原断裂体系[J]. 物探与化探, 2019, 43(1): 28-35.
Cheng LIU, Yu-Shan YANG, Tian-You LIU, Dan ZHU, Bai-Zhou AN. Qualitative and quantitative interpretation of fracture system in Yinchuan plain based on gravity data. Geophysical and Geochemical Exploration, 2019, 43(1): 28-35.
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