汶川8级大地震对川滇菱形区域内次级块体的运动影响分析

发布时间：2018-05-08 18:23

本文选题：川滇区域 + 欧拉矢量　；参考：《测绘通报》2017年01期

【摘要】：在中国境内所有的二级块体运动中,川滇区域的地壳运动最为活跃,也是各学者研究的热点领域。本文通过对1998—2008年和2008—2015年两期GNSS连续观测数据的解算(时间节点为汶川地震),并结合前人对川滇区域棱形块体的划分方案,利用欧拉矢量计算出各次级块体的欧拉矢量。对该区域进行了网格插值从而反演两期地壳运动变化特征,以及通过在断裂带上或断裂带附近选取一点来研究相邻块体的相对运动趋势变化,并对该区域内地块垂向运动作了初步研究分析。结果表明,汶川地震并没有造成该区域整体运动特征的改变,但对一些局部块体的运动和相邻块体的相对运动带来了一定的影响。
[Abstract]:Among all the secondary block movements in China, the crustal movement in Sichuan-Yunnan region is the most active, and it is also a hot research field of scholars. In this paper, the Euler vectors of each sub-block are calculated by using Euler vector by calculating the GNSS continuous observation data from 1998 to 2008 and 2008 to 2015 (the time node is Wenchuan earthquake), and combining with the previous partition scheme of the prism block in Sichuan-Yunnan region. Grid interpolation is carried out to invert the characteristics of crustal movement in two periods, and the relative movement trend of adjacent blocks is studied by selecting a point on or near the fault zone. The vertical motion of the block in this area is studied and analyzed. The results show that the Wenchuan earthquake did not cause the change of the whole motion characteristics of the region, but it has a certain effect on the movement of some local blocks and the relative motion of adjacent blocks.
【作者单位】：山东科技大学;中国测绘科学研究院;
【基金】：国家自然科学基金(41474011) 国家青年科学基金(41404034) 国家公益性行业专项(B1503) 国家基础测绘科技项目(2016KJ0205) 中国测绘科学研究院科研业务费(7771502)
【分类号】：P315.2;P228.4

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