The crust and upper mantle of the Sulu UHPM belt

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	The crust and upper mantle of the Sulu UHPM belt
	Yang, WC (Yang, Wencai)
刊名	TECTONOPHYSICS
	2009
卷号	475 期号:2 页码:226-234
关键词	Ultrahigh-pressure belt Sulu of eastern China S-wave tomography Deep seismic reflection Crust and mantle structures Tectonic reconstruction model
ISSN号	0040-1951
英文摘要	All results from integrated geophysical investigations in the Sulu region are summarized in this paper, trying to reconstruct the Sulu UHPM processes. New seismic S-wave tomographic results suggest a velocity-abnormal zone occurs beneath the Sulu crust, revealing detailed upper mantle structures that high-velocity lumps within the abnormal zone are sequentially distributed beneath the bottom of the asthenosphere. These high-velocity lumps might represent delaminated eclogites or residuals of the subducted oceanic plate. Based on integrated interpretation of the geophysical data, we propose a working model for tectonic reconstruction of the Sulu UHPM processes, which can explain the crust and upper mantle structures of the area. The involved tectonic processes are related to north-eastward escaping of the Sulu terrane, subduction and delamination cycles of the Dabie-Sulu oceanic plate, and post-orogenic lithospheric thinning and magma underplating. The UHPM rocks are believed to have syn-subduction delaminated down to the bottom of the asthenosphere during 245-180 Ma, and the delamination process seemed smooth and nearly continuous without extensive violence. (C) 2009 Elsevier B.V. All rights reserved.
学科主题	变质岩岩石学
WOS关键词	PRESSURE METAMORPHIC ROCKS ; EAST-CENTRAL CHINA ; NORTH CHINA ; TERRANE
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000271331800004
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/38941]
专题	中国地质调查局
作者单位	Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China
推荐引用方式 GB/T 7714	Yang, WC . The crust and upper mantle of the Sulu UHPM belt[J]. TECTONOPHYSICS,2009,475(2):226-234.
APA	Yang, WC .(2009).The crust and upper mantle of the Sulu UHPM belt.TECTONOPHYSICS,475(2),226-234.
MLA	Yang, WC ."The crust and upper mantle of the Sulu UHPM belt".TECTONOPHYSICS 475.2(2009):226-234.