Crustal structure of seismic velocity in southern Tibet and east-westward escape of the crustal material - An example by wide-angle seismic profile from Peigu Tso to Pumoyong Tso
文献类型：期刊论文
| 作者 | Zhang, ZJ; Teng, JW; Li, YK; Klemperer, S; Yang, LQ |
| 刊名 | SCIENCE IN CHINA SERIES D-EARTH SCIENCES
 |
| 出版日期 | 2004-06-01 |
| 卷号 | 47期号:6页码:500-506 |
| 关键词 | Southern Tibet Crustal Structure Lower Velocity Layer Delamination East-west Escape |
| ISSN号 | 1006-9313 |
| DOI | 10.1360/03yd0518 |
| 文献子类 | Article |
| 英文摘要 | The reflecting events from Moho and other interfaces within the crust are recognized from the wavefield characteristics of P- and S-wave for the 480km long wide-angle seismic profile between Peigu Tso and Pumoyong Tso. Then, seismic crustal structures of P- and S-wave velocities and Poisson ratio under the nearly east-west profile in southern Tibet are interpreted by fitting the observed traveltimes with the calculated ones by forward modelling. Our interpreting results demonstrate that the crustal thickness varies remarkably in the east-west direction, showing a pattern that the crust could be divided into three parts bounded by the west of Dingri and the east of Dinggye, respectively, where the depth of Moho is about 71 km for the western part, about 76km for the middle and about 74km for the eastern. There is one lower velocity layer (LVL) at the bottom of the upper crust with depth of 20-30 km. One of the distinct features is that the thickness of LVL abruptly thins from 24km on the west to 6km on the east. The other is that the velocity variation in the crust along east-west direction for both P- and S-wave displays a feature as quasi-periodic variation. The lower velocity (compared to the average value for the continent of the globe) in the lower crust and three sets of north-southward active normal faults are probably attributed to the coupling process of material delamination in the lower crust, crustal thicking and east-westward escape of the crustal material accompanied with the continental collision between India and Eurasia Plate. |
| WOS关键词 | UPLIFT ; DELAMINATION ; MOVEMENT ; PLATEAU |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000223147200003 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/64726]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Zhang, ZJ |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100101, Peoples R China 2.Chinese Acad Geol Sci, Minist Land & Resources, Inst 562, Yanjiao 110101, Peoples R China 3.Stanford Univ, Dept Geophys, Stanford, CA 94305 USA |
| 推荐引用方式 GB/T 7714 | Zhang, ZJ,Teng, JW,Li, YK,et al. Crustal structure of seismic velocity in southern Tibet and east-westward escape of the crustal material - An example by wide-angle seismic profile from Peigu Tso to Pumoyong Tso[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2004,47(6):500-506. |
| APA | Zhang, ZJ,Teng, JW,Li, YK,Klemperer, S,&Yang, LQ.(2004).Crustal structure of seismic velocity in southern Tibet and east-westward escape of the crustal material - An example by wide-angle seismic profile from Peigu Tso to Pumoyong Tso.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,47(6),500-506. |
| MLA | Zhang, ZJ,et al."Crustal structure of seismic velocity in southern Tibet and east-westward escape of the crustal material - An example by wide-angle seismic profile from Peigu Tso to Pumoyong Tso".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 47.6(2004):500-506. |
入库方式： OAI收割
来源：地质与地球物理研究所
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