Structural model of the lithosphere-asthenosphere system beneath the Qinghai-Tibet Plateau and its adjacent areas

doi:10.1016/j.tecto.2014.08.017

	Structural model of the lithosphere-asthenosphere system beneath the Qinghai-Tibet Plateau and its adjacent areas
	Zhang, Xuemei 1,2; Teng, Jiwen 2; Sun, Ruomei 2; Romanelli, Fabio 3,5; Zhang, Zhongjie 2; Panza, Giuliano F.3,4,5,6
刊名	TECTONOPHYSICS
	2014-11-05
卷号	634 页码:208-226
关键词	Surface wave tomography Non-linear inversion Lithosphere-asthenosphere system Qinghai-Tibet Plateau
ISSN号	0040-1951
DOI	10.1016/j.tecto.2014.08.017
文献子类	Article
英文摘要	The deep structure of the lithosphere-asthenosphere system, as imaged from geophysical data, of the Qinghai-Tibet Plateau, the highest on the Earth, provides important clues in understanding its orogenic processes. Here we reconstruct the main features of the structure of the crust and upper mantle from surface wave tomography in the Qinghai-Tibet Plateau and its adjacent areas, in order to understand the modality of the convergence and collision process between the Indian and Eurasian plates. Based on Rayleigh waves dispersion theory, we collected long period and broad-band seismic data from the global and regional seismic networks surrounding the study area (20 degrees N-50 degrees N, 70 degrees E-110 degrees E). After applying instrument response calibration and filtering, group velocities of the fundamental mode of Rayleigh waves are measured using the frequency-time analysis (FTAN). Combining the published dispersion data, a 2-D surface-wave tomography method is applied to calculate the lateral variations of group velocity distribution at different periods, in the range from 8 s to 150 s. The Hedgehog nonlinear inversion method is performed to obtain shear wave velocity (Vs) versus depth models of the crust and upper mantle for 181 cells, with size 2 degrees x 2 degrees. In order to identify the cellular representative models, we applied the local smoothness optimization method (LSO). Fairly detailed structural models of the lithosphere-asthenosphere system have been defined. The Vs models demonstrate the lateral variation of the thickness of the metasomatic lid between the south and north of the Bangong-Nujiang Suture (BNS) and the west and east of Tibet. The variation in thickness of the metasomatic lid may suggest that the leading edge of the subducting Indian slab reaches up to BNS. (C) 2014 Elsevier B.V. All rights reserved.
WOS关键词	SURFACE-WAVE TOMOGRAPHY ; UPPER-MANTLE BENEATH ; CRUSTAL STRUCTURE ; SOUTHERN TIBET ; GROUP VELOCITIES ; DUCTILE EXTRUSION ; QIANGTANG BASIN ; RAYLEIGH-WAVES ; CHANNEL FLOW ; NORTH CHINA
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000345108500016
资助机构	National Natural Science Foundation of China(41274062 ; National Natural Science Foundation of China(41274062 ; Monumental Projects of National Natural Science Foundation of China(90914012) ; Monumental Projects of National Natural Science Foundation of China(90914012) ; Wenchuan Fault Scientific Drilling Program ; Wenchuan Fault Scientific Drilling Program ; Italian PRIN projects ; Italian PRIN projects ; PNRA projects(2004/2.7-2.8 ; PNRA projects(2004/2.7-2.8 ; 40804009) ; 40804009) ; 2009/A2.17) ; 2009/A2.17) ; National Natural Science Foundation of China(41274062 ; National Natural Science Foundation of China(41274062 ; Monumental Projects of National Natural Science Foundation of China(90914012) ; Monumental Projects of National Natural Science Foundation of China(90914012) ; Wenchuan Fault Scientific Drilling Program ; Wenchuan Fault Scientific Drilling Program ; Italian PRIN projects ; Italian PRIN projects ; PNRA projects(2004/2.7-2.8 ; PNRA projects(2004/2.7-2.8 ; 40804009) ; 40804009) ; 2009/A2.17) ; 2009/A2.17) ; National Natural Science Foundation of China(41274062 ; National Natural Science Foundation of China(41274062 ; Monumental Projects of National Natural Science Foundation of China(90914012) ; Monumental Projects of National Natural Science Foundation of China(90914012) ; Wenchuan Fault Scientific Drilling Program ; Wenchuan Fault Scientific Drilling Program ; Italian PRIN projects ; Italian PRIN projects ; PNRA projects(2004/2.7-2.8 ; PNRA projects(2004/2.7-2.8 ; 40804009) ; 40804009) ; 2009/A2.17) ; 2009/A2.17) ; National Natural Science Foundation of China(41274062 ; National Natural Science Foundation of China(41274062 ; Monumental Projects of National Natural Science Foundation of China(90914012) ; Monumental Projects of National Natural Science Foundation of China(90914012) ; Wenchuan Fault Scientific Drilling Program ; Wenchuan Fault Scientific Drilling Program ; Italian PRIN projects ; Italian PRIN projects ; PNRA projects(2004/2.7-2.8 ; PNRA projects(2004/2.7-2.8 ; 40804009) ; 40804009) ; 2009/A2.17) ; 2009/A2.17)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/85344]
专题	中国科学院地质与地球物理研究所
通讯作者	Zhang, Xuemei
作者单位	1.China Earhquake Networks Ctr, Beijing 10045, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China 3.Univ Trieste, Dept Math & Geosci, I-34127 Trieste, Italy 4.China Earthquake Adm, Inst Geophys, Beijing, Peoples R China 5.SAND Grp, Int Ctr Theoret Phys, Trieste, Italy 6.Int Seism Safety Org, Arsita, Italy
推荐引用方式 GB/T 7714	Zhang, Xuemei,Teng, Jiwen,Sun, Ruomei,et al. Structural model of the lithosphere-asthenosphere system beneath the Qinghai-Tibet Plateau and its adjacent areas[J]. TECTONOPHYSICS,2014,634:208-226.
APA	Zhang, Xuemei,Teng, Jiwen,Sun, Ruomei,Romanelli, Fabio,Zhang, Zhongjie,&Panza, Giuliano F..(2014).Structural model of the lithosphere-asthenosphere system beneath the Qinghai-Tibet Plateau and its adjacent areas.TECTONOPHYSICS,634,208-226.
MLA	Zhang, Xuemei,et al."Structural model of the lithosphere-asthenosphere system beneath the Qinghai-Tibet Plateau and its adjacent areas".TECTONOPHYSICS 634(2014):208-226.