气候变化领域集成服务门户(CCPortal): Joint inversion of receiver function, ambient noise dispersion, and Rayleigh wave ZH ratio for the crustal structure beneath the northeastern margin of the Tibetan plateau and its surrounding regions

CCPortal

DOI	10.6038/cjg2022Q0177
	Joint inversion of receiver function, ambient noise dispersion, and Rayleigh wave ZH ratio for the crustal structure beneath the northeastern margin of the Tibetan plateau and its surrounding regions
	Gao TianYang; Ding ZhiFeng; Xu XiaoMing; Wang XingChen
发表日期	2023
ISSN	0001-5733
起始页码	4074
结束页码	4094
卷号	66 期号:10
英文摘要	We process the continuous waveform data recorded by 571 broadband temporary seismic stations in the northeastern (NE) margin of the Tibetan plateau and its surrounding regions, and jointly invert the ambient noise dispersion, Rayleigh wave ZH ratio, and P-wave receiver function to obtain high-resolution 3D S-wave velocity structure (V-S) of the crust. The results demonstrate that significant low-velocity anomalies of S-wave appear in the depth interval of 15 similar to 40 km beneath the Songpan-Garze block and the western Qinling orogen as well as the northern Qilian orogen. The low-velocity zone below the Songpan-Garze block and the western Qinling orogen may be related to the crustal partial melting, and the causes of partial melting are not only shear heating but also asthenosphere material upwelling and crustal radioactivity. While that of the northern Qilian orogen may be related to surface uplift and crustal thickening. Many insignificant low-velocity anomalies are observed beneath the Alxa block, which may be related to the complex tectonic deformation of the Alxa block. Relatively insignificant low-velocity anomalies are also observed at the depth interval of 20 similar to 35 km beneath the Yinchuan-Hetao graben, which is more likely to be related to the underplating of mafic magmas.
关键词	Northeastern margin of the Tibetan plateau Joint inversion Receiver function Ambient noise dispersion ZH ratio Low-velocity body
英文关键词	UPPER-MANTLE STRUCTURE; PERIOD SEISMIC DATA; LOW-VELOCITY ZONE; RADIAL ANISOTROPY; NORTH CHINA; CONTINENTAL DEFORMATION; POISSON RATIO; EASTERN TIBET; KUNLUN FAULT; FLOW PATTERN
WOS研究方向	Geochemistry & Geophysics
WOS记录号	WOS:001086914800006
来源期刊	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283895
作者单位	China Earthquake Administration; China Earthquake Administration
推荐引用方式 GB/T 7714	Gao TianYang,Ding ZhiFeng,Xu XiaoMing,et al. Joint inversion of receiver function, ambient noise dispersion, and Rayleigh wave ZH ratio for the crustal structure beneath the northeastern margin of the Tibetan plateau and its surrounding regions[J],2023,66(10).
APA	Gao TianYang,Ding ZhiFeng,Xu XiaoMing,&Wang XingChen.(2023).Joint inversion of receiver function, ambient noise dispersion, and Rayleigh wave ZH ratio for the crustal structure beneath the northeastern margin of the Tibetan plateau and its surrounding regions.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,66(10).
MLA	Gao TianYang,et al."Joint inversion of receiver function, ambient noise dispersion, and Rayleigh wave ZH ratio for the crustal structure beneath the northeastern margin of the Tibetan plateau and its surrounding regions".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 66.10(2023).