Abstract：We use GPS data as boundary conditions to simulate the displacement and stress fields of the Longxian-Baoji fault zone and its adjacent area by the finite element method, and analyze the distribution characteristics of the current crustal activity and the tectonic stress field in this area. The results show that: 1) The tensile stress of Weihe basin at the southern of Longxian-Baoji fault zone and Qishan-Mazhao fault is weak. 2) The stress properties and direction of the border zone between the southwestern margin of the Ordos block and Longxian-Baoji fault zone are consistent with the Longxian-Baoji fault zone, which shows the characteristics of the tensive activity paralleled to the strike of the fault zone. 3) The maximum principal stress shows that Longxi block and Qinling mountains tectonic zones present strong tensile stress. 4) The second principal stress shows that the compressive stress of SEE direction is significant on the southern side of the border zone between the southern of the Longxian-Baoji fault zone and Qinling mountains tectonic zone.
DAI Hongbao,TANG Hongtao. Analysis of Tectonic Stress Field Characteristics of Longxian-Baoji Fault Zone Based on GPS Data[J]. jgg, 2021, 41(4): 413-418.
