气候变化领域集成服务门户(CCPortal): Detailed Moho variations under Northeast China inferred from receiver function analyses and their tectonic implications

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DOI	10.1016/j.pepi.2020.106448
	Detailed Moho variations under Northeast China inferred from receiver function analyses and their tectonic implications
	Zhang, Bing; Lei, Jianshe; Yuan, Xiaohui; Zhang, Guangwei; He, Jing; Xu, Qiang
通讯作者	Lei, JS (通讯作者)
发表日期	2020
ISSN	0031-9201
EISSN	1872-7395
卷号	300
英文摘要	In this study we investigate detailed Moho variations beneath Northeast China by applying the arithmetic mean, back-projected and Fresnel-zone migration imaging methods to a total of 169,602 high-quality P-wave receiver functions from seismograms of 2903 teleseismic events recorded at 127 NECESSArray stations and 321 China Earthquake Administration stations. Our results show that the Moho depth variations are correlated with the surface geology in the study region. The Moho is deeper (similar to 34.0-42.0 km) under the Great Xing'an range, the Lesser Xing'an range, the Zhangguangcai range, and the Changbaishan mountain, whereas it is shallower (similar to 26.0-32.0 km) under the Songliao basin. Our results also reveal obvious Moho variations across the North-South Gravity Lineament. The Moho offsets up to similar to 5.0 km are clearly observed under the Nenjiang-Balihan, Yilan-Yitong, and Dunhua-Mishan faults, indicating that they are lithospheric-scale faults. A deeper Moho is revealed under the volcanoes, such as the Jingpohu, Wudalianchi, and Changbaishan volcanoes and Abaga and Halaha volcanic groups. In particular, the Moho under the Changbaishan volcano reaches similar to 40.0 km depth and the observation varies with the teleseismic back-azimuths, suggesting a complicated magma system in the crust. In addition, the Moho under the Songliao basin varies significantly from similar to 26.0 km depth in the east to similar to 32.0 km depth in the west, which could be related to the lithosphere extension and thinning. All these results suggest that there exists a hot and wet mantle upwelling in the big mantle wedge formed by the deep dehydration of the long stagnant Pacific slab in the mantle transition zone under Northeast China.
关键词	P-WAVE TOMOGRAPHY MANTLE TRANSITION ZONE QUATERNARY VOLCANISM STAGES MAIN HIMALAYAN THRUST XINGAN RANGE EVIDENCE ASIAN OROGENIC BELT CRUSTAL STRUCTURE NE CHINA INTRAPLATE VOLCANISM VELOCITY STRUCTURE
英文关键词	Receiver function; Migration imaging; Moho depth; Northeast China
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000526829900002
来源期刊	PHYSICS OF THE EARTH AND PLANETARY INTERIORS
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/259839
推荐引用方式 GB/T 7714	Zhang, Bing,Lei, Jianshe,Yuan, Xiaohui,et al. Detailed Moho variations under Northeast China inferred from receiver function analyses and their tectonic implications[J]. 中国科学院青藏高原研究所,2020,300.
APA	Zhang, Bing,Lei, Jianshe,Yuan, Xiaohui,Zhang, Guangwei,He, Jing,&Xu, Qiang.(2020).Detailed Moho variations under Northeast China inferred from receiver function analyses and their tectonic implications.PHYSICS OF THE EARTH AND PLANETARY INTERIORS,300.
MLA	Zhang, Bing,et al."Detailed Moho variations under Northeast China inferred from receiver function analyses and their tectonic implications".PHYSICS OF THE EARTH AND PLANETARY INTERIORS 300(2020).