Spatial distribution characteristics of Yanjiao fault in Beijing sub-central area
Yi HE1, Xiao-Dong LEI1,2, Wei GUAN1, Chen LI1, Qiao-Ling LI1
1. Beijing Institute of Geo-exploration Technology, Beijing 100120, China 2. State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
The integrated geophysical exploration work of high-accuracy gravity, CSAMT and microtremor survey was carried out in Tongzhou District, capital subcenter of Beijing, the position of Yanjiao fault was redetermined and one new branch fault was discovered in the north of Yanjiao according to repeated comparison and analysis of different results interpreted in many ways. In addition, the results were proved by some boreholes. These surveys indicate that the utilization of combinational method of gravity, electricity and vibration to investigate the fault structure won't be feasible under the disturbance of the complex electromagnetic environment in cities. The spatial layout features of Yanjiao fault and branch fault will be significant in the development of geothermal resources and prevention of geological disasters.
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doi: 10.1016/j.jappgeo.2016.04.009
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