中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 地质与地球物理研究所
  3. 中国科学院地质与地球物理研究所
  4. 岩石圈演化国家重点实验室
East-West Differential Underthrusting of the Indian Lithospheric Plate Beneath Central Tibet Revealed by Imaging V-P/V-S

文献类型：期刊论文

作者Si, Shaokun1; Gao, Rui1,2; Tian, Xiaobo3,4
刊名JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
出版日期2019-09-11
页码17
关键词differential underthrusting imaging Vp Vs receiver function Indian lithospheric mantle central Tibet
ISSN号2169-9313
DOI10.1029/2018JB017259
英文摘要Although numerous research studies have already provided basic information on deeper lithospheric structure under Tibet, the northernmost edge and the geometry of the northward underthrusting of the Indian mantle lithosphere are yet to be understood. The P wave to S wave velocity ratio (V-P/V-S) can provide more insight into the mantle physical state than either V-P or V-S alone, owing to their different sensitivities to partial melting, temperature, and composition. High V-P/V-S usually indicates that partial melting exists in the upper mantle, while anomalously low V-P/V-S in the upper mantle reflects the enrichment of orthopyroxene in the subduction zone mantle wedge. Using teleseismic records of 164 broadband stations deployed in central Tibet, we obtained a high-resolution velocity ratio image of the upper mantle. A striking difference is seen between western and eastern Tibet. A distinct high V-P/V-S zone exists at relatively a shallow depth (<200 km) to the west of the Yadong-Gulu Rift, while the eastern part exhibits a shallow region (south of the Bangong-Nujiang suture in the depth range of 120-160 km) with abnormally low V-P/V-S. Moreover, there are high V-P/V-S areas existing below 270-km depth, and it appears further east at depth of 340 km than that at depth of 270 km. We propose that this difference reflects different geometries of the underthrusting Indian mantle lithosphere from west to east. Slab tearing under eastern Tibet and lithospheric delamination under western Tibet are likely good candidates to explain the observation.
WOS关键词UPPER-MANTLE ; SEISMIC ANISOTROPY ; SOUTHERN TIBET ; WAVE VELOCITY ; ULTRAPOTASSIC MAGMATISM ; GEOCHEMICAL VARIATIONS ; TECTONIC EVOLUTION ; POISSONS RATIO ; NORTHERN TIBET ; CRUST BENEATH
资助项目National Key R&D Program of China[2016YFC0600301] ; strategic Priority Research Program (B) of the Chinese Academy of Science[XDB03010700] ; National Natural Science Foundation of China[41774051] ; National Natural Science Foundation of China[41590863] ; National Natural Science Foundation of China[41430213]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000486908000001
出版者AMER GEOPHYSICAL UNION
资助机构National Key R&D Program of China ; National Key R&D Program of China ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; strategic Priority Research Program (B) of the Chinese Academy of Science ; strategic Priority Research Program (B) of the Chinese Academy of Science ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/93711]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Si, Shaokun
作者单位1.Sun Yat Sen Univ, Sch Earth Sci & Engn, Southern Marine Sci & Engn Guangdong Lab Zhuhai, Guangzhou, Guangdong, Peoples R China
2.Chinese Acad Geol Sci, Inst Geol, Beijing, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
4.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Si, Shaokun,Gao, Rui,Tian, Xiaobo. East-West Differential Underthrusting of the Indian Lithospheric Plate Beneath Central Tibet Revealed by Imaging V-P/V-S[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2019:17.
APA Si, Shaokun,Gao, Rui,&Tian, Xiaobo.(2019).East-West Differential Underthrusting of the Indian Lithospheric Plate Beneath Central Tibet Revealed by Imaging V-P/V-S.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,17.
MLA Si, Shaokun,et al."East-West Differential Underthrusting of the Indian Lithospheric Plate Beneath Central Tibet Revealed by Imaging V-P/V-S".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH (2019):17.

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。