Using shear wave splitting measurements to investigate the upper mantle anisotropy beneath the North China Craton: Distinct variation from east to west

doi:10.1029/2005GL022585

	Using shear wave splitting measurements to investigate the upper mantle anisotropy beneath the North China Craton: Distinct variation from east to west
	Zhao, L; Zheng, TY
刊名	GEOPHYSICAL RESEARCH LETTERS
	2005-05-21
卷号	32 期号:10
ISSN号	0094-8276
DOI	10.1029/2005GL022585
文献子类	Article
英文摘要	A compilation of shear wave splitting measurements in the North China Craton (NCC) is presented to investigate the upper mantle anisotropy beneath the region. By applying the method of Silver and Chan ( 1991), the splitting parameters of fast polarization direction and delay time are determined from SKS waveforms for 38 broadband stations. The results reveal the presence of small to large seismic anisotropy in the mantle beneath the NCC. The most striking result is the distinct difference of fast polarization directions between the Eastern Block (EB) and the Central Zone (CZ) of the NCC. The fast polarization directions trend SE beneath the EB, which implies that northwestward mantle flow has played a significant role in the reactivating of the EB during Late Mesozoic to Early Cenozoic, and the boundary between the CZ and the EB was possibly a west limit where the mantle flow was deflected. However, a collision event occurred in Early Proterozoic was also a possible cause for the anisotropy of the lithosphere beneath the CZ, depending on the craton lithosphere beneath the region had not been completely reformed by later tectonic activities.
WOS关键词	SINO-KOREAN CRATON ; LITHOSPHERE BENEATH ; DEFORMATION ; EVOLUTION ; CONSTRAINTS ; SKS
WOS研究方向	Geology
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000229584800005
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/65274]
专题	中国科学院地质与地球物理研究所
通讯作者	Zhao, L
作者单位	Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Zhao, L,Zheng, TY. Using shear wave splitting measurements to investigate the upper mantle anisotropy beneath the North China Craton: Distinct variation from east to west[J]. GEOPHYSICAL RESEARCH LETTERS,2005,32(10).
APA	Zhao, L,&Zheng, TY.(2005).Using shear wave splitting measurements to investigate the upper mantle anisotropy beneath the North China Craton: Distinct variation from east to west.GEOPHYSICAL RESEARCH LETTERS,32(10).
MLA	Zhao, L,et al."Using shear wave splitting measurements to investigate the upper mantle anisotropy beneath the North China Craton: Distinct variation from east to west".GEOPHYSICAL RESEARCH LETTERS 32.10(2005).