| Upper mantle convection beneath northwest China and its adjacent region driven by density anomaly |
| |
| 作者姓名： | 许萍 傅容珊 黄建平 查显杰 戴志阳 |
| |
| 作者单位： | [1]CAS Key Laboratory of Crust-Mantle Materials and Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China [2]Earthquake Administration of Shandong Province, Ji＇nan 250014, China |
| |
| 基金项目： | Foundation item： The Project of Knowledge Innovation Program of Chinese Academy of Sciences （KZCX3-SW-131） and National Natural Science Foundation of China （40274033） |
| |
| 摘 要： | Introduction The northwest of China includes Tarim, Junggar and Qaidam basins, and Kunlun, Tianshan, Altun and Qilian mountains, as well as the north part of the Tibetan Plateau. For a long time, the study of lithosphere structures and dynamics in this area has been a popular topic in geoscience, and has yielded many results. For example, TANG (1994) and LI et al (1998) suppose that the tectonic structure of Tarim Basin is various with geological periods, which changes many times betwee…
|
| 关 键 词： | 地幔 层析术 地震 构造运动 |
| 文章编号： | 1000-9116（2006）05-0552-11 |
| 收稿时间： | 2005-04-21 |
| 修稿时间： | 2006-07-13 |
Upper mantle convection beneath northwest China and its adjacent region driven by density anomaly |
| |
| XU Ping,FU Rong-shan,HUANG Jian-ping,ZHAXian-jie,DAI Zhi-yang.Upper mantle convection beneath northwest China and its adjacent region driven by density anomaly[J].Acta Seismologica Sinica(English Edition),2006,19(5):552-562. |
| |
| Authors: | XU Ping FU Rong-shan HUANG Jian-ping ZHAXian-jie DAI Zhi-yang |
| |
| Institution: | 1. CAS Key Laboratory of Crust-Mantle Materials and Environments,School of Earth and Space Sciences,University of Science and Technology of China,Hefei,230026,China;Earthquake Administration of Shandong Province,Ji'nan;250014,China
2. CAS Key Laboratory of Crust-Mantle Materials and Environments,School of Earth and Space Sciences,University of Science and Technology of China,Hefei,230026,China |
| |
| Abstract: | We assume that the density anomalies, which are transformed from seismic tomography data, are corresponding to temperature distribution in a convective mantle. We take density anomalies as the driving force for mantle convection and solve the basic equation with given boundary conditions in a wave-number domain by using the FFT arithmetic. Using the physical model of upper mantle convection and the seismic tomography data supplied by XU et al, we calculated upper mantle convection beneath northwestern China and adjacent region. The flow patterns in the upper mantle show that there are upward and divergent flows in the basin regions, such as Tarim, Qaidam, Junggar and Kazakhstan, where the lithosphere is thin. There are downward and convergent flows in the mountain regions, such as Tianshan, Kunlun and Qilian, where the lithosphere is thick. In addition, because of the divergent flow under the Tarim Basin the upper mantle material in this region is driven southward to the north part of Tibetan Plateau and northward to Tianshan Mountain. Maybe, it is one of the reasons for the recent uplift of the Tianshaa Mountain. |
| |
| Keywords: | mantle convection northwestern China and its adjacent region seismic tomography |
| 本文献已被 CNKI 维普 万方数据 SpringerLink 等数据库收录！ |
|
