论文部分内容阅读
基于中国国家攀登计划“现代地壳运动和动力学研究”项目建立的全国ＧＰＳ网１９９４ 年１９９６ 年的复测数据， 推算了测点的运动速度； 按Ｈａｉｎｅｓ和Ｈｏｌｔ提出的球面上水平速度的“转动函数幂级数展开法”， 计算了水平速度和应变率场， 初步探讨了中国大陆现今地壳运动和形变的态势与特征． 结果表明： 印度、太平洋和菲律宾海板块联合控制着中国大陆的现今地壳运动和形变， 三大板块呈鼎足之势， 但印度板块似乎起主导作用； 南北地震带在中国大陆现今地壳运动和形变过程中起重要调节作用， 大区分界线特征突出； 大致沿北纬３５°线， 似乎也存在一个调节带， 但分界线特征没有前者明显； 三大板块对我国大陆的动力作用是动态稳定的， 表现为推挤速度的稳定． 这些与地质学、地球物理学和地震学的结果是基本相符的．对比地震活动， 初步显示高强度的剪切形变带与未来强震活动区有一定程度的对应关系， 但需进一步的震例检验．
Based on the re-measurement data of the national GPS network established in 1996 by the China National Climbing Project “Modern Crustal Movement and Dynamics Study”, the moving speed of the measuring point is deduced. According to the “rotation of the horizontal speed of the sphere” proposed by Haines and Holt Function Power Series Expansion Method ", the horizontal velocity and strain rate field are calculated, and the current situation and characteristics of crustal movement and deformation in mainland China are discussed preliminarily. The results show that the Indian Plateau, the Pacific Ocean and the Philippine Sea plate jointly control the current crustal movement and deformation in mainland China. The three plates are at their best. However, the Indian plate seems to play a leading role. The North-South seismic belt in the present China crustal movement and deformation process It seems that there is also an adjustment band, but the characteristics of the boundary line are not obvious. The dynamic action of the three plates on the Chinese mainland is dynamic and stable, Push speed stability. These are basically in line with the results of geology, geophysics and seismology. Compared with the seismic activity, it is initially shown that there is a certain degree of correspondence between the high-strength shear deformation zone and the future active area of strong earthquakes, but a further earthquake test is needed.