摘要
利用福建沿海地区GPS基本网2003—2010年4期观测资料,运用GAMIT/GLOBK软件及块体整体旋转线性应变模型,得到了各站相对于整个块体的形变速度和块体上的应变图像。结果显示:福建沿海地区具有一致的东南向运动,大小在35 mm/a左右;邵武-河源断裂带附近的剪切应变较大,政和-海丰断裂带与永安-晋江断裂带交汇处剪切应变相对较小,长乐-诏安断裂带从南到北的剪切应变经历了一个南弱北强到南强北弱的变化过程,政和-海丰断裂带和永安-晋江断裂带交汇处最大和最小主应变由压应变转为张应变;福建地区从西北到东南沿海经历了由张到压-由压到张-由张到压的变化过程。
By using the 4-periods observations of GPS seismic monitoring network in Fujian coastal area from 2003 to 2010, we calculate the velocities of GPS stations and the deformation velocity components of sites and strain field in Fujian area with the GAMIT/GLOBK software and an integral-rotation linear strain model. The results are as follows： Fujian coastal area exhibits consistent southeastward movement, and the value is about 35 mm/a. The area near Shaowu-Heyuan fault zone shows larger shear, and the junction of Zhenghe-Haifeng and ~ongan-Jinjiang fault zone shows smaller shear. The shear of Changle-Zhaoan fault zone from south to north shows higher intensity in the north during early years, but higher intensity in the south thereafter. The principal strain field of the junction of Zhenghe-Haifeng and Yongan-Jinjiang fault zone changes from compressive strain to tensile strain, and that of Fu- jian coastal area from northwest to southeast changes from tensile to compressive strain first, then compressive to tensile strain, and finally returns to compressive strain.
出处
《大地测量与地球动力学》
CSCD
北大核心
2013年第A01期23-27,共5页
Journal of Geodesy and Geodynamics
基金
福建省地震局青年科技基金(Y201004)
关键词
福建沿海地区
GPS
断裂带
形变场
应变场
Fujian coastal area
GPS
fault zone
deformation field
strain field
