中国西部地壳水平运动引起的重力场空间变化特征  

CHARACTERISTICS OF GRAVITY CHANGE CAUSED BY HORIZONTAL CRUST MOVEMENT IN WESTERN CHINA

作　　者：段虎荣[1,2] 张永志[2] 徐海军[2] 焦胜军[1] 

机构地区：[1]陕西铁路工程职业技术学院,渭南714000 [2]长安大学地质工程与测绘学院,西安710054

出　　处：《大地测量与地球动力学》2011年第1期24-28,共5页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(40674001)

摘　　要：用数值模拟方法研究地壳水平运动与空间重力变化的关系,得出:地壳划分的长方体在单一方向上水平位移引起的空间重力变化呈负对称分布。结合中国西部地区的数字高程以及GPS观测速率数据,计算了中国西部地区地壳水平运动引起的重力场变化,将其与卫星重力观测结果进行对比并作出解释。The relation between horizontal crust movement and the gravity change was studied and it is simulated that the spacial gravity change caused by the horizontal displacement of a crustal cuboid in a single direction is distributed in a negative symmetry.Being taken as an example,the distribution of the gravity change in the western China caused by the horizontal crustal movement and combining with the GPS velocity field and DEM data was calculated,and then the results were compared with the gravity changes by satellite gravimetry and an explanation was given.

关 键 词：卫星重力 重力变化 地壳水平位移 中国西部地区 速率场 

分 类 号：P315.72[天文地球—地震学]