Lithospheric structure of the Chinese mainland determined from joint inversion of regional and teleseismic Rayleigh-wave group velocities

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	Lithospheric structure of the Chinese mainland determined from joint inversion of regional and teleseismic Rayleigh-wave group velocities
	Feng, M (Feng, Mei); An, MJ (An, Meijian)
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
	2010
卷号	115 页码:-
ISSN号	0148-0227
英文摘要	We processed a large number of vertical-component seismograms recorded by broadband seismic stations in and around China and ultimately retrieved similar to 33 140 regional and similar to 10 360 teleseismic fundamental-mode group-velocity measurements at 40 s periods, with fewer measurements for shorter and longer periods. We directly inverted the processed group-velocity measurements for a three-dimensional lithospheric S-velocity model of the Chinese mainland. Synthetic test results and data fit or misfit analysis demonstrated the reliability of our surface-wave tomographic inversion. The imaged upper-crustal low velocities are consistent with variations in sediment thickness; for example, the Tarim Basin, which contains a great thickness of sediments, is characterized by a strong, shallow, low-velocity anomaly. High lithospheric velocities are observed to varying depths in the North China Craton, Yangtze Craton, and Tarim Craton, indicating varying thicknesses of the lithosphere beneath these cratonic areas. Low asthenospheric velocities are widely imaged in eastern and southern China, around the Tarim Basin, and along a roughly north-south belt in central China. The low asthenospheric velocities in eastern and southern China are attributed to partial melting of a subducted slab associated with the westward subduction of an oceanic plate, while those in central China and around the Tarim Basin are attributed to Indian-Eurasian collision.
学科主题	固体地球物理学
WOS关键词	UPPER-MANTLE STRUCTURE ; SPARSE LINEAR-EQUATIONS ; BENEATH SOUTHEAST-ASIA ; LEAST-SQUARES ; P-WAVE ; SEISMIC ANISOTROPY ; DISPERSION-CURVES ; ADJACENT REGIONS ; STAGNANT SLABS ; NORTH CHINA
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000279313500001
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39227]
专题	中国地质调查局
作者单位	Chinese Acad Geol Sci, Inst Geomech, Beijing 100081, Peoples R China
推荐引用方式 GB/T 7714	Feng, M ,An, MJ . Lithospheric structure of the Chinese mainland determined from joint inversion of regional and teleseismic Rayleigh-wave group velocities[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2010,115:-.
APA	Feng, M ,&An, MJ .(2010).Lithospheric structure of the Chinese mainland determined from joint inversion of regional and teleseismic Rayleigh-wave group velocities.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,115,-.
MLA	Feng, M ,et al."Lithospheric structure of the Chinese mainland determined from joint inversion of regional and teleseismic Rayleigh-wave group velocities".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 115(2010):-.