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

作　　者：李小云 杨莹辉 许强[1] 宋家苇 李鹏飞 王运生[1] 陈强[3] LI Xiaoyun;YANG Yinghui;XU Qiang;SONG Jiawei;LI Pengfei;WANG Yunsheng;CHEN Qiang(State Key Laboratory of Geohazard Prevention and Geoenvironmental Protection,Chengdu University of Technology,Chengdu 610059,China;Power China Guiyang Survey and Design Institute Co.,Ltd.,Guiyang 550081,China;Department of Remote Sensing and Information Engineering,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川成都610059 [2]中国电建集团贵阳勘察设计研究院有限公司,贵州贵阳550081 [3]西南交通大学遥感与信息工程系,四川成都610031

出　　处：《灾害学》2024年第4期15-23,共9页Journal of Catastrophology

基　　金：四川省哲学社会科学基金特别委托重大项目(SCJJ23WT06);新疆维吾尔自治区重点研发技术项目(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);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).

摘　　要：该文获取Sentinel-1卫星升降轨合成孔径雷达影像,采用SBAS-InSAR技术提取木格措南断裂区域地表形变速率场,结果显示木格措南断裂北段和中段局部区域存在明显的断裂相关构造运动信号,而断裂南段未发现明显的断裂活动信号。针对北段和中段的局部断裂构造形变,提取其时序形变并与局部的降水和气温开展关联分析,同时联合升降轨数据开展了垂向形变和平行断层方向的形变分解,并选取典型剖面和时序点开展联合分析,发现断裂北段和中段的显著形变,受气温降水的周性变化和青藏高原冰川均衡调整过程影响显著,研究表明木格措南断裂区域发现的地表形变,是气温降水和冰川均衡调整过程造成的周期性形变与断裂构造形变的叠加。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 

分 类 号：X43[环境科学与工程—灾害防治] X915.5