气候变化领域集成服务门户(CCPortal): Less-Well-Developed Crustal Channel-Flow in the Central Tibetan Plateau Revealed by Receiver Function and Surface Wave Joint Inversion

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DOI	10.1029/2022JB025747
	Less-Well-Developed Crustal Channel-Flow in the Central Tibetan Plateau Revealed by Receiver Function and Surface Wave Joint Inversion
	Nie, Shitan; Tian, Xiaobo; Liang, Xiaofeng; Wan, Bo
发表日期	2023
ISSN	2169-9313
EISSN	2169-9356
卷号	128 期号:4
英文摘要	A crustal channel-flow model has been previously used to explain the formation of crustal extensional structures in the Tibetan Plateau. However, the existence of massive crustal channel-flow in the central plateau is still controversial. To reveal the crustal S-wave velocity structure with high vertical resolution, we conducted a joint inversion of receiver functions and surface wave dispersions from the 2-D broadband seismic array SANDWICH deployed in the central plateau. Our results show a low-velocity layer (LVL) in the middle-lower crust beneath all stations. The minimum S-wave velocity in each LVL is mostly within 3.0-3.4 km/s, which result in the maximum velocity reductions are less than 17.5%. It deduces a melt volume percentage (MVP) less than 7% even attributing all velocity reduction to partial melting of rocks. Our study suggests that there is not a high enough melt volume in central Tibet to develop crustal channel-flow, which requires a larger MVP to decrease rock strength more than an order of magnitude. The formation of extensional structures in the central plateau may contribute to ductile deformation in the middle-lower crust but not crustal channel-flow.
关键词	Tibetan Plateau crustal channel-flow joint inversion receiver function surface wave
英文关键词	EXPERIMENTAL DEFORMATION; SEISMIC VELOCITIES; AMBIENT NOISE; DISPERSION; BENEATH; ARRAY; EVOLUTION; SANDWICH; RHEOLOGY; GRANITE
WOS研究方向	Geochemistry & Geophysics
WOS记录号	WOS:000963601300001
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283670
作者单位	Chinese Academy of Sciences; Institute of Geology & Geophysics, CAS; Chinese Academy of Sciences
推荐引用方式 GB/T 7714	Nie, Shitan,Tian, Xiaobo,Liang, Xiaofeng,et al. Less-Well-Developed Crustal Channel-Flow in the Central Tibetan Plateau Revealed by Receiver Function and Surface Wave Joint Inversion[J],2023,128(4).
APA	Nie, Shitan,Tian, Xiaobo,Liang, Xiaofeng,&Wan, Bo.(2023).Less-Well-Developed Crustal Channel-Flow in the Central Tibetan Plateau Revealed by Receiver Function and Surface Wave Joint Inversion.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,128(4).
MLA	Nie, Shitan,et al."Less-Well-Developed Crustal Channel-Flow in the Central Tibetan Plateau Revealed by Receiver Function and Surface Wave Joint Inversion".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 128.4(2023).