【摘要】 地壳应变场研究是地球动力学研究的一个基础性领域, 以往文献的探索大多集中在地壳形变的测量和研究上, 包括大面积水准测量和GPS观测等。文中利用多种地震学参数研究中国大陆地壳应变场, 利用哈佛CMT目录和现代中国地震目录得到了中国大陆不同区域面波震级与标量地震矩的统计关系, 进而采用中国大陆历史地震资料研究中国大陆地壳应变场, 给出地震最大剪切应变率场的分布。研究结果显示, 青藏高原及其周边地区是最大剪切应变率的高值区, 帕米尔和阿萨姆地区的应变率值最大。与GPS得到的应变场结果进行比较, 两者的结果存在一致趋势。利用NEIC宽频带地震辐射能量目录研究了中国大陆的地震视应变分布, 显示地震的视应变分布与地壳应变水平存在一定相关关系, 且发生在青藏高原周边地区地震的视应变水平较高。这些研究结果为地球动力学研究的进一步深入探讨提供了新的科学资料。更多还原

【Abstract】 Study on crustal strain field is a basic field in geodynamic researches. The researches in the field are mainly centralized in the survey and studies of the crustal deformation, including the leveling survey and GPS survey in a large area, etc. In this paper, the crustal strain field of the continental China is studied by using several seismic parameters. The statistic relationship between magnitude of surface wave and scalar seismic moment in different regions of China is presented by using Harvard CMT catalogue and present-day earthquake catalogue of China. Then, the historical earthquake data are used to study the crustal strain field on the China’s continent, and the distribution of the seismic maximal shear strain rate is presented. The result indicates that the Tibetan Plateau and its surrounding regions show a high-value of maximal shear strain rates, and the strain rates in the Pamirs and Asam regions are the largest. Compared with the GPS strain field, these two kings of results are coincident. The distribution of seismic apparent strain in China’s continent is studied by using the seismic radiated energy catalogue that provide by the NEIC (National Earthquake Information Center). The distribution of apparent strain is related with the level of crustal deformation, and the apparent stains of earthquakes that located in the surrounding regions of Tibetan Plateau are higher. Those results provide new scientific data for the researches on geodynamic.更多还原