灾害学2024，Vol.39Issue(4)：15-23,9.DOI:10.3969/j.issn.1000-811X.2024.04.003
木格措南断裂异常运动信号InSAR探测与成因机制研究
Research on InSAR Detection of Abnormal Motion Signals of the Mugecuonan Fault and Its Cause Mechanism
摘要
Abstract
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.关键词
木格措南断裂/InSAR监测/周期性形变/冰川均衡调整/构造形变Key words
Mugecuonan fault/InSAR monitoring/periodic deformation/glacier balance adjustment/tectonic deformation分类
资源环境引用本文复制引用
李小云,杨莹辉,许强,宋家苇,李鹏飞,王运生,陈强..木格措南断裂异常运动信号InSAR探测与成因机制研究[J].灾害学,2024,39(4):15-23,9.基金项目
四川省哲学社会科学基金特别委托重大项目(SCJJ23WT06) （SCJJ23WT06）
新疆维吾尔自治区重点研发技术项目(2023B03011) （2023B03011）
地质灾害防治与地质环境保护国家重点实验室自主研究课题(SKLGP2021Z016) （SKLGP2021Z016）
中国电建科技项目"高寒山区高位高危地质灾害早期识别及监测关键技术研究"(DJ-ZDXM-2020-03). （DJ-ZDXM-2020-03）
