Mantle seismic anisotropy beneath NE China and implications for the   lithospheric delamination hypothesis beneath the southern Great Xing&apos;an   range

doi:10.1016/j.epsl.2017.04.030

CORC > 北京大学 > 地球与空间科学学院

	Mantle seismic anisotropy beneath NE China and implications for the lithospheric delamination hypothesis beneath the southern Great Xing'an range
	Chen, Haichao ; Niu, Fenglin ; Obayashi, Masayuki ; Grand, Stephen P. ; Kawakatsu, Hitoshi ; Chen, Y. John ; Ning, Jieyuan ; Tanaka, Satoru
刊名	EARTH AND PLANETARY SCIENCE LETTERS
	2017
关键词	NE China seismic anisotropy lithosphere deformation mantle flow and delamination CENOZOIC BASALTS NORTHEAST CHINA INNER-MONGOLIA FLOW BENEATH PACIFIC SLAB ORIGIN VOLCANISM CRUSTAL TOMOGRAPHY PLATE
DOI	10.1016/j.epsl.2017.04.030
英文摘要	We measured shear wave splitting from SKS data recorded by the transcontinental NECESSArray in NE China to constrain lithosphere deformation and sublithospheric flows beneath the area. We selected several hundreds of high quality SKS/SKKS waveforms from 32 teleseismic earthquakes occurring between 09/01/2009 and 08/31/2011 recorded by 125 broadband stations. These stations cover a variety of tectonic terranes, including the Songliao basin, the Changbaishan mountain range and Zhangguancai range in the east, the Great Xing'an range in the west and the Yanshan orogenic belt in the southwest. We assumed each station is underlaid by a single anisotropic layer and employed a signal-to-noise ratio (SNR) weighted multi event stacking method to estimate the two splitting parameters (the fast polarization direction go, and delay time, delta t) that gives the best fit to all the SKS/SKKS waveforms recorded at each station. Overall, the measured fast polarization direction lies more or less along the NW-SE direction, which significantly differs from the absolute plate motion direction, but is roughly consistent with the regional extension direction. This suggests that lithosphere deformation is likely the general cause of the observed seismic anisotropy. The most complicated anisotropic structure is observed beneath the southern Great Xing'an range and southwest Songliao basin. The observed large variations in splitting parameters and the seismic tomographic images of the area are consistent with ongoing lithospheric delamination beneath this region. (C) 2017 Elsevier B.V. All rights reserved.; NSF [EAR-0635666, NSFC41274099, EAR-0635855]; JSPS [19104011]; NSFC [40821062, 90814002]; SCI(E); ARTICLE; 32-41; 471
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/471950]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Chen, Haichao,Niu, Fenglin,Obayashi, Masayuki,et al. Mantle seismic anisotropy beneath NE China and implications for the lithospheric delamination hypothesis beneath the southern Great Xing'an range[J]. EARTH AND PLANETARY SCIENCE LETTERS,2017.
APA	Chen, Haichao.,Niu, Fenglin.,Obayashi, Masayuki.,Grand, Stephen P..,Kawakatsu, Hitoshi.,...&Tanaka, Satoru.(2017).Mantle seismic anisotropy beneath NE China and implications for the lithospheric delamination hypothesis beneath the southern Great Xing'an range.EARTH AND PLANETARY SCIENCE LETTERS.
MLA	Chen, Haichao,et al."Mantle seismic anisotropy beneath NE China and implications for the lithospheric delamination hypothesis beneath the southern Great Xing'an range".EARTH AND PLANETARY SCIENCE LETTERS (2017).