天津地区的水平形变特征  

Study on horizontal deformation characteristics in Tianjin area

作　　者：张风霜[1] 郭良迁[1] 

机构地区：[1]中国地震局第一监测中心,天津300180

出　　处：《测绘科学》2014年第12期86-90,115,共6页Science of Surveying and Mapping

基　　金：2013年中国地震局地震研究所所长基金项目(IS201266112);2014年度地震科技星火计划项目(XH14068Y);2013年中国地震局行业专项地球物理场流动观测信息融合关键技术研究项目联合资助

摘　　要：根据天津及周边地区GNSS连续观测站资料,在计算得到各站三维站坐标时间序列结果的基础上,文章分析了天津地区GNSS基线时间序列的变化情况和水平形变变化特征。结果显示,天津地区总体呈现压扭变化,不同地段存在差异。天津地区NE-SW向和NW-SE向GNSS基线的伸长和缩短变化呈北西向条带状相间分布。日本3·11地震使天津地壳出现近东西向拉张为主的活动,一定程度上释放消减了天津地区的挤压应变。According to the data from GNSS continuous stations in Tianjin and the surrounding areas, and on the basis of calculating the time-series of three-dimensional coordinates, the paper analyzed the changes of GNSS baseline time-series and horizontal deformation characteristics in Tianjin area. The results suggested that, on the whole, twist compression deformation is presented in Tianjin area, and differences exist among various sections. The trend variations of elongated and shortened GNSS baselines of NE-SW and NW-SE directions are zonation in the space, and these zones show a northwest interphase arrangement in the plane. The nearly EW tensional tectonic activities are showed in Tianjin due to the influence of 3-11 Japan Earthquake, and the compressive strain in Tianjin has been released to some extent by the effects of this earthquake.

关 键 词：GNSS连续观测站 时间序列 GNSS基线 形变带 大地震影响 

分 类 号：P228[天文地球—大地测量学与测量工程]