| 若尔盖地区地壳三维体波速度结构研究 |
| |
| 引用本文： | 赵林林,尹欣欣,蔡润,张远富.若尔盖地区地壳三维体波速度结构研究[J].大地测量与地球动力学,2021,41(5):454-458. |
| |
| 作者姓名： | 赵林林 尹欣欣 蔡润 张远富 |
| |
| 作者单位： | 甘肃省地震局,兰州市东岗西路450号,730000;中冶成都勘察研究总院有限公司,成都市三色路199号,610063 |
| |
| 摘 要： | 利用双差层析成像方法反演若尔盖地区三维速度结构，得到该地区的精细三维速度结构和高精度震源位置参数。反演结果显示，研究区速度结构整体呈低速状态，反映出青藏高原内部具有部分熔融物质特性；在青藏高原东北缘地区，强烈的构造变形特征以及低速区蔓延方向印证了青藏高原内部物质向东南方向流溢的科学推测；低速青藏高原板块与相对较硬的若尔盖地块相互挤压导致应力累积，因而在两者的高低速过渡带区域内发生了若尔盖系列地震。
|
| 关 键 词： | 若尔盖地区 双差层析成像 三维速度结构 地震重定位 |
Three-Dimensional Body Wave Velocity Structure of Crustal Region in Ruoergai |
| |
| ZHAO Linlin,YIN Xinxin,CAI Run,ZHANG Yuanfu.Three-Dimensional Body Wave Velocity Structure of Crustal Region in Ruoergai[J].Journal of Geodesy and Geodynamics,2021,41(5):454-458. |
| |
| Authors: | ZHAO Linlin YIN Xinxin CAI Run ZHANG Yuanfu |
| |
| Abstract: | In this paper, using double-difference tomography, we inverse the three-dimensional velocity structure of the Ruoergai region of Sichuan province. We obtain the fine 3D velocity structure and high precision source position parameters of the region. The inversion results show that the whole velocity structure of the study area is in a low-speed state, which reflects the partial melting material characteristics within the Qinghai-Tibet plateau. In the northeast margin of Qinghai-Tibet plateau, the strong structural deformation characteristics and the spreading direction of the low-speed region confirm the scientific speculation that the material overflows to the southeast. The stress accumulation results from the compression of the Qinghai-Tibet plateau plate and relatively hard Ruoergai block, so the Ruoergai series earthquakes occurred in the high and low-speed transition zone. |
| |
| Keywords: | Ruoergai region double-difference tomography 3D velocity structure earthquake relocation |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《大地测量与地球动力学》浏览原始摘要信息 |
| 点击此处可从《大地测量与地球动力学》下载免费的PDF全文 |
