| 青藏块体东北缘近期水平运动与变形 |
| |
| 引用本文： | 江在森,张希,崔笃信,胡亚轩,陈文胜,王双绪,陈兵.青藏块体东北缘近期水平运动与变形[J].地球物理学报,2001,44(5):636-644. |
| |
| 作者姓名： | 江在森 张希 崔笃信 胡亚轩 陈文胜 王双绪 陈兵 |
| |
| 作者单位： | 中国地震局第二地形变监测中心,西安710054 |
| |
| 基金项目： | 国家重点基础研究发展规划项目 (G1 9980 40 70 3 ) |
| |
| 摘 要： | 利用青藏块体东北缘地区13、1年GPS观测资料，给出了本区地壳水平运动速度场及视应变场分布图，提出了由位移观测值直接求解块体旋转和变形参数的方法，初步研究了本区构造块体运动与变形特征.结果表明：①本区存在整体性向东-东南方的运动(速率约mm/a)；②南部的甘肃-青海块体的运动较快，而北部的阿拉善块体的运动较慢，二者运动速率相差近6mm/a，祁连-海原断裂带左旋走滑运动显著.③自西向东存在北北东-北东东向压性运动；④阿拉善块体、甘肃-青海块体内部存在北西西向张性变形，阿拉善块体的整体张性变形更显著，鄂尔多斯块体西侧的块体交接地带为压性运动.
|
| 关 键 词： | GPS观测结果 块体运动与变形 视应变场 青藏块体 |
| 文章编号： | 0001-5733(2001)05-0636-09 |
| 收稿时间： | 2000-10-17 |
RECENT HORIZONTAL MOVEMENT AND DEFORMATION IN THE NORTHEAST MARGIN OF QINGHAI-TIBET BLOCK |
| |
| JIANG ZAI-SEN ZHANG XI CUI DU-XIN HU YA-XUANJZCHEN WEN-SHENG WANG SHUANG-XU CHEN BING.RECENT HORIZONTAL MOVEMENT AND DEFORMATION IN THE NORTHEAST MARGIN OF QINGHAI-TIBET BLOCK[J].Chinese Journal of Geophysics,2001,44(5):636-644. |
| |
| Authors: | JIANG ZAI-SEN ZHANG XI CUI DU-XIN HU YA-XUANJZCHEN WEN-SHENG WANG SHUANG-XU CHEN BING |
| |
| Institution: | The Second Crustal Deformation Monitoring Center, China Seismological Bureau, Xi'an 710054, China |
| |
| Abstract: | HTThe distribution of velocity field of crustal horizontal movement and apparent strain field in the northeast margin of Qinghai-Xizang block is studied on the basis of GPS data in 1993 and 1999. A method for directly solving the parameters of block rotation and deformation from displacement observation is presented. The characteristics of tectonic motion and deformation in this area are studied preliminarily. The results show that (1) There exists a whole motion toward east-southeast with a velocity of 9mm/a; (2) Gansu-Qinghai block in the south of this area moves faster, while Alashan block in the north of this area moves slower, the difference of the velocity between two blocks is near 6mm/a, the sinistral strike slip movement of Qilian-Haiyuan fracture zone is much more remarkable; (3) There exists NNE-NEE compressional movement from west to east; (4) Inside Alashan block and Gansu-Qinghai block, there exist NWW tensional deformation, the whole tensional deformation of Alashan block is even more obvious. In the meeting region of blocks in the west side of Ordos block, there exists compressional movement. HTH |
| |
| Keywords: | HTZK(GPS observational results Block movement and deformation Apparent strain field Qinghai-Xizang block |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《地球物理学报》浏览原始摘要信息 |
| 点击此处可从《地球物理学报》下载免费的PDF全文 |
