基于GNSS观测资料分析乌鲁木齐地区形变特征  

DEFORMATION CHARACTERISTICS OF URUMQI AREA BASED ON GNSS OBSERVATION DATA

作　　者：苏力坦·玉散 艾力夏提·玉山[1] 刘代芹[1] 李桂荣[1] 方伟[1] Sulitan·Yusan;Ailixiati·Yushan;LIU Dai-qin;LI Gui-rong;FANG Wei(Earthquake Agency of Xinjiang Uygur Autonomous Region,Urumqi 830011,Xinjiang,China)

机构地区：[1]新疆维吾尔自治区地震局,新疆乌鲁木齐830011

出　　处：《内陆地震》2021年第2期157-164,共8页Inland Earthquake

基　　金：新疆维吾尔自治区重点研发专项(2020B03006-2);新疆地震局科技创新团队计划(XJDZCXTD2020-1);2018年地震局基金(201812,201811)。

摘　　要：基于时间序列和速度场结果分析乌鲁木齐地区的水平和垂直运动特征。利用GAMIT/GLOBK10.6软件对乌鲁木齐及周边7个CORS站2012~2019年的观测数据进行处理,获取CORS基准站在ITRF2014框架下的三维坐标时间序列,并根据坐标时间序列通过最小二乘拟合获得该地区的GNSS速度场。结果表明:乌鲁木齐CORS站在ITRF2014框架下的东西向和南北向平均运动速率分别为32.05 mm·a^(-1)和5.13 mm·a^(-1)。垂直方向WJQZ站的下沉和上升的周期性变化量最大到达(-33.77±1.87)mm·a^(-1),FUKZ、CHJZ两个站亦有下沉趋势。西山断裂南侧4个站存在小幅向上抬升趋势,平均速率为1.47 mm·a^(-1)。7个CORS站数据结果与周围的IGS(URUM)站和"陆态网络"连续站解算结果进行对比验证,显示出较好的一致性。Analyzed horizontal and vertical movement characteristics of Urumqi and its adjacent region based on time series and velocity field results.Obtained 3 D time series result of 7 CORS stations under ITRF 2014 frame in Urumqi and its adjacent region using GAMIT/GLOBK10.6 software and data of CORS stations from 2012 to 2018,and calculated GNSS velocity field of these areas using least squares fitting method based on time series results.The result shows that the east-west and north-south movement velocity of Urumqi CORS station under ITRF2014 frame are 32.05 mm·a^(-1) and 5.13 mm·a^(-1) respectively,the maximum periodic variation of subsidence and rise of WJQZ station in vertical direction is-33.77±87 mm·a^(-1),and FUKZ and CHJZ also tend to sink.The four stations in the south of Xishan fault have a slight upward uplift trend,with an average rate of 1.47 mm·a^(-1).The data results of 7 CORS stations are compared with those of IGS(URUM)stations and CMONOC stations,which show good consistency.

关 键 词：GAMIT/GLOBK GPS速度场 时间序列 乌鲁木齐 

分 类 号：P315.7[天文地球—地震学]