木格措南断裂异常运动信号InSAR探测与成因机制研究OA北大核心CSTPCD

By obtaining the synthetic aperture radar image of the Sentinel-1 satellite ascending and descending orbit and using SBAS-InSAR technology,the surface deformation rate field in the Mugecuo South Fault area is extracted.The results show that there are obvious fault-related tectonic movement signals in local areas of the northern and middle sections of the Mugecuo South Fault but no obvious fault activity signal is found in the southern segment of the fault.In view of the local fault structural deformation in the northern and middle sections,its time series deformation is extracted and correlation analysis is conducted with local precipitation and temperature.At the same time,the ascending and descending orbit data is combined to carry out vertical deformation and deformation decomposition parallel to the fault direction,and by selecting typical sections and a joint analysis of time series points,it is found that the significant deformation in the northern and middle sections of the fault is significantly affected by the cyclic changes in temperature and precipitation and the isostatic adjustment process of the glaciers on the Tibetan Plateau.It is shown in the study that the surface deformation found in the southern Mugecuo fault area is caused by the temperature and the superposition of periodic deformation caused by the isostatic adjustment process of precipitation and glaciers and deformation of fault structures.