Abstract:Using GAMIT/GLOBK software, we process the observation files of 37 AHCORS reference stations during Jan. 2013 and June 2018, and obtain the velocity fields of the stations under ITRF2008 and Eurasia frameworks. The error between the velocity field simulated by multi-scale spherical wavelet and the actual velocity field is less than 2 mm/a, indicating that this method effectively reflects crustal movement in this region. We use multiscale spherical wavelet to calculate and analyze the strain rates of the southern segment of the Tanlu fault zone and its surrounding areas. The results show that most of the areas west of the southern segment of the Tanlu fault zone are compressed, while most of the areas east of the Tanlu fault zone are dilatated in general. The abnormal variation of strain direction is located at the junction of plane expansion and plane compression. The maximum shear strain rate is symmetrically distributed along both sides of the southern segment of the Tanlu fault zone, and the northwest and southeast regions are high value regions with large strain accumulation and the possibility of earthquake, to which more attention should be paid. The southern segment of the Tanlu fault zone is mainly dextral strike-slip, there is tension in the north, the tensile component gradually decreases in the south, and the southernmost part turns into compression state.
CHEN Hao,TAO Tingye,LI Shuiping et al. Analysis of Crustal Deformation and Fault Activity Characteristics in the Southern Segment of Tanlu Fault Zone with AHCORS[J]. jgg, 2022, 42(1): 65-70.