Crustal structure and mantle transition zone thickness beneath the northeastern area of the North China Craton and adjacent region

doi:10.6038/cjg20130107

	Crustal structure and mantle transition zone thickness beneath the northeastern area of the North China Craton and adjacent region
	Wang Bing-Yu 1,2; Chen Ling 1; Ai Yin-Shuang 3; He Yu-Mei 3
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2013
卷号	56 期号:1 页码:60-68
关键词	Northeastern boundary region of the North China Craton Receiver function Crustal thickness 410 km discontinuity 660 km discontinuity
ISSN号	0001-5733
DOI	10.6038/cjg20130107
文献子类	Article
英文摘要	We apply a receiver function poststack migration method to teleseismic waveform data received by portable broadband stations, and obtain crustal and mantle transition zone structural image beneath the northeast boundary region of the North China Craton and adjacent areas. The result shows that the crustal thickness of our study region displays significant lateral variations. On the northwestern side of North-South Gravity lineament, the crust is thicker, averaging 38 km in Xingmeng orogenic belt, whereas in Yanshan belt, Songliao Basin and Liaodong anteclise, which locate on the southwestern side of North-South Gravity lineament(NSGL), the thickness of crust is much thinner (30 similar to 35 km). This feature probably indicates that the crust of the opposite sides of the NSGL might have been destructed and thinned to different degrees during late Mesozoic to Cenozoic. The structural image of mantle transition zone reveals some topographic lateral variations of the 410 km and 660 km discontinuities. Between longitude 121 degrees and 122 degrees, there are double discontinuities at depths of 660 km and 690 km. East of longitude 122.5 degrees, the 410 km discontinuity depresses 5 similar to 20 km, and the 660 km discontinuity uplifts 5 similar to 15 km, resulting in a 10 similar to 20 km thinner than global average mantle transition zone which reflects a warm lower uppermantle environment. We suggest that the Pacific subducted slabs were trapped in mantle transition zone between longitude 119 degrees and 122 degrees and didn't reach the west of longitude 118 degrees; With the increasing of slab materials in mantle transition zone, part of the slab might have sunk into the lower mantle to the east of longitude 124 degrees, which would cause a small-scale convection and generate hot upwelling.
WOS关键词	SEISMIC DISCONTINUITY ; TECTONIC IMPLICATIONS ; YANSHAN BELT ; TOPOGRAPHY ; RATIO
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000314480100007
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/87475]
专题	中国科学院地质与地球物理研究所
通讯作者	Wang Bing-Yu
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earths Deep Interior, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Wang Bing-Yu,Chen Ling,Ai Yin-Shuang,et al. Crustal structure and mantle transition zone thickness beneath the northeastern area of the North China Craton and adjacent region[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2013,56(1):60-68.
APA	Wang Bing-Yu,Chen Ling,Ai Yin-Shuang,&He Yu-Mei.(2013).Crustal structure and mantle transition zone thickness beneath the northeastern area of the North China Craton and adjacent region.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,56(1),60-68.
MLA	Wang Bing-Yu,et al."Crustal structure and mantle transition zone thickness beneath the northeastern area of the North China Craton and adjacent region".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 56.1(2013):60-68.