环渤海区域地壳水平运动速度场构建方法研究

发布时间：2018-06-08 05:12

本文选题：GPS速度场 + 欧拉矢量法　；参考：《山东科技大学》2017年硕士论文

【摘要】：传统的地质、地球物理方法研究地壳运动是用长期积累的地质、物理资料结合一定的数学方法来描述地壳运动,但由于其时间跨度大、资料短缺等缺点,面临着巨大的挑战。先进的GPS技术使得地壳运动的实时监测变为可能,为研究区域构造、地壳运动形变、预测地震等自然灾害的发生具有重要意义。文章使用“中国大陆构造环境监测网络(CMONOC ) ”在环渤海区域(30°N～45°N,111°E～129°E)的GPS监测台站的数据资料,采取多种拟合方法和传统刚性模型的欧拉矢量法对环渤海区域建立整体和分块速度场模型,然后进行精度对比,最终得到环渤海地区最优速度场,对研究环渤海区域的地壳运动形变研究起到了一定的作用.主要研究内容包括:(1)分析传统刚性运动模型欧拉矢量法及拟合方法的原理及特点,基于CMONOC近期的GPS观测数据,利用七种方法,其中包括欧拉矢量法、反距离加权法、克里金法、最小曲率法、最近邻点法、自然邻点法、线性三角网法,以此来建立环渤海地区整体运动速度场模型。以全部参与建模全部检核的内检核方式及部分建模部分检核的外检核方式计算、汇总上述方法的建模结果,对比分析各方法的精度及特点。(2)研究环渤海区域的板块划分,根据环渤海地区的地质构造、地震带和断裂带的分布,结合模型的构建结果,对环渤海区域进行次级块体的划分,并检验其划分的正确性和合理性。(3)欧拉矢量法及反距离加权法、克里金法、最小曲率法三种拟合对分块体建模效果较好,在各次级块体选取精度相对高的方法,进行1°×1°格网插值,并用GMT绘制环渤海区域整体速度场及次级块体边界的速度场,分析各次级块体及块体边界的运动状态。
[Abstract]:The study of crustal movement by traditional geological and geophysical methods is based on long-term accumulation of geology. Physical data combined with certain mathematical methods are used to describe crustal movement. However, due to its long time span and shortage of data, it faces great challenges. The advanced GPS technology makes it possible to monitor crustal movement in real time. It is of great significance to study regional structure, crustal deformation and predict the occurrence of natural disasters such as earthquakes. In this paper, the data of GPS monitoring stations at 30 掳N ~ (45 掳) and 111 掳E ~ (129 掳E) around the Bohai Sea are used in the "China Continental tectonic Environment Monitoring Network (CMONOC)". By using various fitting methods and Eulerian vector method of traditional rigid model, the global and block velocity field models are established for the region around the Bohai Sea, and then the accuracy is compared to obtain the optimal velocity field in the surrounding Bohai Sea area. It plays an important role in the study of crustal movement and deformation around the Bohai Sea. The main research contents include: (1) analyzing the principle and characteristics of Euler vector method and fitting method of traditional rigid motion model. Based on the recent GPS observation data of CMONOC, seven methods are used, including Euler vector method, inverse distance weighting method, Kriging method. The minimum curvature method, the nearest neighbor point method, the natural neighbor point method and the linear triangular network method are used to establish the global velocity field model of the Bohai region. Based on the calculation of the internal checking mode of all the models involved in all checking and the external checking mode of partial modeling part checking, the modeling results of the above methods are summarized, and the accuracy and characteristics of each method are compared and analyzed. (2) the plate division around the Bohai Sea region is studied. According to the geological structure, distribution of seismic zone and fault zone around Bohai Sea, combined with the result of model construction, the sub-block is divided into sub-blocks around Bohai Sea. The correctness and reasonableness of the partition are tested. Euler vector method and inverse distance weighting method, Kriging method and minimum curvature method are used to model the block, and the accuracy of selecting the sub-block is relatively high. The 1 掳脳 1 掳grid interpolation is carried out, and the global velocity field and the velocity field of the secondary block boundary are plotted by GMT, and the motion state of each secondary block and block boundary is analyzed.
【学位授予单位】：山东科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P228.4;P229

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