Seismic tomography in the northeast margin area of Sino-Korean platform
文献类型：期刊论文
| 作者 | Lu, ZX; Jiang, XQ; Pan, K; Bai, Y; Jiang, DL; Xiao, LP; Liu, JH; Liu, FT; Chen, H; He, JK |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2002-05-01 |
| 卷号 | 45期号:3页码:338-351 |
| 关键词 | Sino-Korean platform lateral inhomogeneous lower velocity layer in the crust |
| ISSN号 | 0001-5733 |
| 文献子类 | Article |
| 英文摘要 | Based on 38 000 P-wave arrival times recorded during the period of 1980 to 1997 in the northeast margin area of Sino-Korean platform (117degrees00'-126degrees00'E, 36degrees00'-44degrees00'N) the 3D velocity structures of the crust and upper mantle have been reconstructed by using orthogonal projection. The tomography results have been proved to be reliable by analyzing and comparing in detail the results with the deep seismic prospecting profiles. It is shown that there exists obvious lateral inhomogeneity in the medium of the crust and upper mantle which is still distinct even at the 120km depth in the northeast margin area of Sino-Korean platform. It is reflected clearly in the velocity image of the upper crust that the distribution of all kinds of rock elements corresponds to that of rocks with different nature in this area. Several lower velocity anomaly regions (i.e. regions with velocity reversed layer) have been discovered in the studied area from the velocity images of upper and middle crust, such as Haicheng, Chaoyang, Yixian, south of Dandong, Tangshan etc., among which the lower velocity layers in Haicheng, Tangshan, Chaoyang have also been proved by the deep seismic sounding data. In the area several strong continental earthquakes all happened in crispy medium with higher velocity above lower velocity layers in the crust, whereas in Bohai sea all strong earthquakes happened in positions where the medium velocity changes abruptly and clearly in horizontal. At different depth, Pulandian-Shanhaiguan lower velocity anomaly zone across Bohai sea with strike NW has been found. Comparison of the velocity images obtained from 2D seismic tomography with that from deep seismic sounding data, we can consider to gain similar effect with deep seismic sounding by taking advantage of seismic tomography under certain condition in this area. |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000175848600006 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/77577]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Lu, ZX |
| 作者单位 | 1.Seismol Bur Liaoning Province, Shenyang 110031, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lu, ZX,Jiang, XQ,Pan, K,et al. Seismic tomography in the northeast margin area of Sino-Korean platform[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2002,45(3):338-351. |
| APA | Lu, ZX.,Jiang, XQ.,Pan, K.,Bai, Y.,Jiang, DL.,...&He, JK.(2002).Seismic tomography in the northeast margin area of Sino-Korean platform.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,45(3),338-351. |
| MLA | Lu, ZX,et al."Seismic tomography in the northeast margin area of Sino-Korean platform".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 45.3(2002):338-351. |
入库方式： OAI收割
来源：地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。