基于GPS速度场的地壳形变动态演化特征分析  

Analysis of Dynamic Evolution Characteristics of Crustal Deformation Based on GPS Velocity Field

作　　者：陈敏 CHEN Min

机构地区：[1]青海省第二测绘院,青海西宁810001

出　　处：《地理空间信息》2020年第10期67-69,73,I0006,共5页Geospatial Information

摘　　要：通过运用GPS大地测量数据,表现出其在大陆地壳形变监测中的重要作用。选取鄂尔多斯地块东缘作为研究区域,计算并分析了该地区在1999-2013年间地壳的水平运动状态,以及主应变率与面膨胀率的动态演化特征,结果显示:①通过实例表明了GPS速度场(大地测量数据)在监测与研究大陆地壳形变的过程中发挥着重要的作用;②山西断裂带整体表现为NE-NEE挤压、NW拉张的运动特征;③近些年山西带北段断裂内部构造应力得以释放,南部尤其在霍山山前断裂、罗云山断裂、中条山北麓断裂存在一定的应力积累现象。In this paper,we used the GPS geodetic data to show its important role in the crustal deformation monitoring.Taking the eastern margin of Ordos Plot as the study area,we calculated and analyzed the crustal horizontal movement from 1999 to 2013,and the dynamic evolution characteristics of principal strain rate and surface expansion rate on this area.The results show that①the GPS velocity(geodetic surveying data)plays an important role in the process of monitoring and the crustal deformation.②The Shanxi fault zone is characterized by the compression in the NE-NEE direction and the tension in the NW direction.③In recent years,the internal tectonic stress of the northern section of Shanxi belt has been released,but there is a certain stress accumulation phenomenon in the southern part such as Holyoke Mountain piedmont fault,Luoyun Mountain fault,and the Zhongtiao Mountain northern piedmont fault.

关 键 词：大地测量 GPS 速度场 形变监测 山西凹陷带 

分 类 号：P228[天文地球—大地测量学与测量工程]