气候变化领域集成服务门户(CCPortal): Crustal Deformation Patterns in the Tibetan Plateau and Its Adjacent Regions as Revealed by Receiver Functions

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DOI	10.1785/0120210228
	Crustal Deformation Patterns in the Tibetan Plateau and Its Adjacent Regions as Revealed by Receiver Functions
	Yang, Yihai; Zhang, Xuemei; Dong, Yunpeng; Sun, Shengsi; Hua, Qian; Liang, Chuntao
通讯作者	Zhang, XM (通讯作者)
发表日期	2022
ISSN	0037-1106
EISSN	1943-3573
起始页码	1297
结束页码	1314
卷号	112 期号:3
英文摘要	In the past decades, several mechanisms (e.g., the crustal flow and thin viscous sheet models) and combinations of them have been proposed to explain the uplift and outgrowth of the Tibetan plateau. These mechanisms, however, cannot account for all the features observed, and the issue is still highly debated. In this study, we computed receiver functions (RFs) at 254 permanent and portable stations in the Tibetan plateau and its adjacent regions to provide large-scale constraints for the crustal deformation. A harmonic analysis, which has been recently proposed to help distinguishing a dipping Moho from crustal anisotropy, was employed here to investigate the accurate crustal anisotropy. We further applied the H-?? stacking technique to determine the crustal composition using the RFs after harmonic correction or moveout correction. Our results showed the following: (1) Harmonic corrections on Ps phases led to average differences of 2.6 km and 0.04 in crustal thickness and in the VP= VS ratio, respectively; notably, the weighting factors of the Ps, PpPs, and PpSs + PsPs phases affected the uncertainties more obviously than the harmonic corrections. (2) The crustal deformation of the central???southern Tibetan plateau was controlled by the faulting and subduction of the Indian plate; meanwhile, faulting played a dominant role in the crustal deformation of the northern and eastern Tibetan plateau. (3) Widespread upper crustal or crustal shortening and thickening should have occurred beneath the entire study region, except for the Chuan???Dian block (which likely underwent tectonic extension). (4) Crustal partial melting might have enhanced the crustal anisotropy, and promoted the accumulation and release of strain, increasing the probability of fracture in the upper crust.
关键词	SEISMIC ANISOTROPY JOINT INVERSION EASTERN MARGIN IMPLICATIONS BENEATH SOUTHEASTERN MARGIN NORTHEASTERN MARGIN SPLITTING ANALYSIS POISSONS RATIO FLOW BENEATH CENTRAL-ASIA
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000803856100008
来源期刊	BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260690
推荐引用方式 GB/T 7714	Yang, Yihai,Zhang, Xuemei,Dong, Yunpeng,et al. Crustal Deformation Patterns in the Tibetan Plateau and Its Adjacent Regions as Revealed by Receiver Functions[J]. 中国科学院青藏高原研究所,2022,112(3).
APA	Yang, Yihai,Zhang, Xuemei,Dong, Yunpeng,Sun, Shengsi,Hua, Qian,&Liang, Chuntao.(2022).Crustal Deformation Patterns in the Tibetan Plateau and Its Adjacent Regions as Revealed by Receiver Functions.BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA,112(3).
MLA	Yang, Yihai,et al."Crustal Deformation Patterns in the Tibetan Plateau and Its Adjacent Regions as Revealed by Receiver Functions".BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA 112.3(2022).