﻿ 环渤海区域及邻区现今地壳构造运动形变特征分析
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 大地测量与地球动力学  2019, Vol. 39 Issue (11): 1101-1105  DOI: 10.14075/j.jgg.2019.11.001

### 引用本文

ZHAO Xukun, ZHANG Jun, LEI Qiankun, et al. Analysis of the Current Tectonic Movement Deformation Characteristics in the Bohai Rim Region and Adjacent Areas[J]. Journal of Geodesy and Geodynamics, 2019, 39(11): 1101-1105.

### Foundation support

Basic Research Project of Science and Technology of Guizhou Province, No.[2017]1054; The Scientific Research Foundation for Talent Introduction of Guizhou University, No.(2016)51; National Natural Science Foundation of China, No.41701464; The Innovation Practice Base Construction of Surveying and Mapping Science and Technology Project of Guizhou University, No.CXJD[2014]002.

### Corresponding author

ZHANG Jun, PhD, associate professor, majors in crustal movement and deformation analysis, E-mail:jzhang1976@163.com.

### 第一作者简介

ZHAO Xukun. postgraduate. majors in plate mowement and crustal deformation analysis, E-mail:764517495@qq.com.

### 文章历史

1. 贵州大学矿业学院，贵阳市花溪区，550025

1 块体划分和数据处理 1.1 块体划分

 图 1 环渤海区域块体划分及相对于欧亚板块的速度场 Fig. 1 Block division of the Bohai rim region and its velocity relative to the Eurasian plate
1.2 数据处理

2 环渤海区域块体运动及应变率分析

 $\begin{array}{l} \left[ {\begin{array}{*{20}{c}} {{v_E}}\\ {{v_N}} \end{array}} \right] = r\left[ {_{\;\;\;\;\;{\rm{sin}}\lambda {\rm{ }}\;{\rm{ }}\;\;\;\;\; - {\rm{cos}}\lambda {\rm{ }}\;{\rm{ }}\;\;\;\;0}^{ - {\rm{cos}}\lambda {\rm{sin}}\varphi {\rm{ }}\; - {\rm{sin}}\lambda {\rm{sin}}\varphi \;\;{\rm{cos}}\varphi }} \right]\;\left[ {\begin{array}{*{20}{c}} {\mathit{\boldsymbol{\omega }} {_x}}\\ {\mathit{\boldsymbol{\omega }} {_y}}\\ {\mathit{\boldsymbol{\omega }} {_z}} \end{array}} \right] + {\rm{ }}\\ \left[ {\begin{array}{*{20}{c}} {{A_0}}&{{B_0}}\\ {{B_0}}&{{C_0}} \end{array}} \right]\left[ {\begin{array}{*{20}{c}} x\\ y \end{array}} \right] + \frac{1}{2}\;\left[ {\begin{array}{*{20}{c}} {{A_1}}&{{B_2}}\\ {{B_1}}&{{C_2}} \end{array}} \right]{\rm{ }}\left[ {\begin{array}{*{20}{c}} {{x^2}}\\ {{y^2}} \end{array}} \right] + \;\left[ {\begin{array}{*{20}{c}} {{A_2}}&{{B_1}}\\ {{B_2}}&{{C_1}} \end{array}} \right]xy \end{array}$ (1)

 图 2 环渤海区域内各块体整体应变状态 Fig. 2 Overall strain state of each block in the Bohai rim region

3 环渤海区域及邻区水平应变场

 图 3 环渤海区域及邻区主应变图 Fig. 3 Main strain map of the Bohai rim region and adjacent areas

4 结语

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Analysis of the Current Tectonic Movement Deformation Characteristics in the Bohai Rim Region and Adjacent Areas
ZHAO Xukun1     ZHANG Jun1     LEI Qiankun1     FAN Chengcheng1
1. College of Mining, Guizhou University, Huaxi District, Guiyang 550025, China
Abstract: Based on GPS ground-to-earth observation velocity field data of the continental tectonic environment monitoring network of China mainland in the Bohai rim region from 2009 to 2014, we use the global rotation and linear strain models for calculation. The area is divided into five sub-blocks, and we obtain the strain field of 0.5°×0.5° of the research area relative to the Eurasian plate. The spatial variation of the deformation velocity field and the strain field are analyzed. It is found that the Bohai rim region presents a two-way trend expansion movement of 0.25×10-9/a NW-SE 111.3°. The strain details of each sub-block are provided: the Taihang block is NW-SE 116.3°, and the Shanxi block is the weak expansion movement of NW-SE 130°. The weak compression movement is NW-SE 144.3°, NE-SW 39.5° and NW-SE 155.6° in the Jiaoliao, Jilu, and Yinshan-Yanshan blocks respectively. The magnitude of the expansion motion of the Taihang block is larger than that of the other secondary blocks. Although the deformation of each sub-block in the Bohai rim region is spatially different, the direction of the main compressive strain axis of the Bohai rim region is basically NEE-SWW, the strain axis is basically NNW-SSE, and the main compressive strain axis direction is NE 47.70°~89.74°, which is generally consistent with the dominant direction of the principal compressive strain axis of the region obtained by geophysical methods, indicating that the current crustal movement in the Bohai sea region is relatively stable.
Key words: Bohai rim region; GPS velocity field; crustal deformation; strain field; current tectonic movement