Anisotropy of the crust and upper mantle beneath the central Tibetan plateau
文献类型：期刊论文
| 作者 | Zhang Zhi1; Tian Xiao-Bo2 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2011-11-01 |
| 卷号 | 54期号:11页码:2761-2768 |
| 关键词 | Central Tibetan Plateau Anisotropy Of The Crust And Upper Mantle Pms Sks Rheology |
| ISSN号 | 0001-5733 |
| DOI | 10.3969/j.issn.0001-5733.2011.11.006 |
| 文献子类 | Article |
| 英文摘要 | This paper analyzes S-wave splitting analysis in terms of P-wave receiver functions and the SKS shear waves from the INDEPTH-III profile which consists of 41 seismic stations deployed in central Tibet. Using the weight average technique with a weighting factor of the measuring error, the direction and extent of seismic polarization anisotropy in the crust and upper mantle beneath central Tibet, from the central Lhasa terrane, across the Karakoram-Jiali fault and Bangong-Nujiang suture to the central Qiangtang terrane, were imaged. Substantial splitting of Pms phase with delay time 0.3 similar to 0.5 s, and fast directions varying from NE-SW in the Lhasa terrane to EW in the Qiangtang terrane, was observed. The delay time of SKS for stations in the northernmost Lhasa terrane and Qiangtang terrane is 1 similar to 2 s which increases near the Bangong-Nujiang suture and Jiali fault, and the fast direction of SKS is similar to the Pms. No detectable SKS splitting was observed for stations located farther south in the central Lhasa terrane, which is related to a model with two-layer anisotropy of perpendicular fast direction. In combination with previous geological and geophysical studies, we infer that the Lhasa crust possesses high rigidity and has not experienced rheological deformation, so that the fast direction of the anisotropy layer in the crust is consistent with the direction of the India-Eurasia convergence. However, the Qiangtang terrane is possibly weaker and more likely has been rheologically deformed during the convergence process, so that the fast direction of the anisotropy layer in the crust and upper mantle is coincident with escaping direction of material of the Tibetan plateau. |
| WOS关键词 | SOUTHERN TIBET ; SURROUNDING REGIONS ; RECEIVER FUNCTIONS ; SPLITTING BENEATH ; WAVE-FORMS ; LITHOSPHERE ; DEFORMATION ; PROPAGATION ; VELOCITIES ; COLLISION |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000297535900006 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/73656]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Zhang Zhi |
| 作者单位 | 1.Guilin Univ Technol, Key Lab Geol Engn Ctr Guangxi Prov, Coll Earth Sci, Guilin 541004, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang Zhi,Tian Xiao-Bo. Anisotropy of the crust and upper mantle beneath the central Tibetan plateau[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2011,54(11):2761-2768. |
| APA | Zhang Zhi,&Tian Xiao-Bo.(2011).Anisotropy of the crust and upper mantle beneath the central Tibetan plateau.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,54(11),2761-2768. |
| MLA | Zhang Zhi,et al."Anisotropy of the crust and upper mantle beneath the central Tibetan plateau".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 54.11(2011):2761-2768. |
入库方式： OAI收割
来源：地质与地球物理研究所
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