汾渭断陷带地壳形变特征分析-测绘工程专业论文.docxVIP

万方数据 万方数据 Subject : The research on the characteristics of crustal deformation in Fenwei rift zone Specialty : Geomatics Engineering Name : Wang Chen (Signature) Instructor : Meng Lumin (Signature) Cui Duxin (Signature) ABSTRACT Fenwei rift zone is one of the most intense seismic belt in seismic activity in North China region, its seismic activity is closely related to the seismic activity of the other three seismic belt in North China area, Fenwei rift zone plays a decisive role in the North China tectonic activity pattern, and reflects the strength of tectonic activity in North China and the dynamic changes in North China area. In addition, it is the key area for regulating tectonic movements among Ordos block, North China block and South China block, the geological structure of the zone is complex and the earthquakes occur frequently, especially in recent years, the frequent earthquakes above 4 level causes the wide attention of scholars. Today, using GPS technology to monitor crustal deformation and seismic precursor has already become a hot spot to study characteristics of crustal deformation and earthquake gestation mechanism, the use of this technology not only promote the development in the research of crustal motion and deformation, but also has important significance on seismic activity judgment and earthquake prediction. In this paper, we collect some information about the characteristics of the tectonic setting, fracture and seismic activity in this zone, and according to the 2009-2013 GPS monitoring data, we get the velocity field results under ITRF2008 with the help of GAMIT/GLOBK software, then use the Euler vector method to calculate Euler rotation parameters of the Eurasian plate under ITRF2008, and obtain the GPS horizontal velocity field of Fenwei rift zone and its adjacent area relative to the Eurasian plate, these practices provide direct and quantitative data for the crustal movement in the study area. Through the profile analysis