Crustal structures across the western Weihe Graben, North China: Implications for extrusion tectonics at the northeast margin of Tibetan Plateau

doi:10.1002/2014JB011210

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 岩石圈演化国家重点实验室

	Crustal structures across the western Weihe Graben, North China: Implications for extrusion tectonics at the northeast margin of Tibetan Plateau
	Tang, Youcai 1,2,3; Zhou, Shiyong 1; Chen, Y. John 1; Sandvol, Eric 4; Liang, Xiaofeng 5; Feng, Yongge 1; Jin, Ge 1; Jiang, Mingming 5; Liu, Mian 4
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
	2015-07-01
卷号	120 期号:7 页码:5070-5081
关键词	Moho offset Poisson's ratio receiver function Weihe Graben Ordos Plateau Qinling Orogen
DOI	10.1002/2014JB011210
文献子类	Article
英文摘要	The stable Ordos Plateau, extensional Weihe Graben, and Qinling orogenic belt are located at the northeast margin of the Tibetan Plateau. They have been thought to play different roles in the eastward expanding of the Tibetan Plateau. Peking University deployed a linear seismic array across the western end of the Weihe Graben to investigate the crustal structures of the tectonic provinces of this structure. Receiver function analyses revealed low-to-moderate Poisson's ratios and anticorrelations between Poisson's ratios and topography beneath the Qinling Orogen. These features may indicate a tectonic thickening of the felsic upper crust by folding and thrusting within the Qinling Orogen. We observed a strong horizontal negative signal at the midcrust beneath the Ordos Plateau which may indicate a low-velocity zone. This observation would suggest the stable cratonic Ordos Plateau had been modified due to the compression between the Tibetan Plateau and the Ordos Plateau. We also observed an abrupt 4km Moho offset across the Weihe Fault, changing from similar to 44km beneath the Ordos Plateau to similar to 40km beneath the Qinling Orogen. We conclude that the Weihe Fault is a lithosphere-scale fault/shear zone, which extends into the upper mantle beneath the Weihe Graben. It acts as the major boundary separating the stable Ordos Plateau and the active Qinling Orogen.
WOS关键词	RECEIVER FUNCTION-ANALYSIS ; RAYLEIGH-WAVE TOMOGRAPHY ; STRUCTURE BENEATH ; SHANXI RIFT ; BASIN ; DEFORMATION ; COLLISION ; BLOCKS ; FLOW
WOS研究方向	Geochemistry & Geophysics
语种	英语
WOS记录号	WOS:000359746700024
资助机构	NSFC(91128210 ; NSFC(91128210 ; Science Foundation of China University of Petroleum, Beijing(2462013YJRC014 ; Science Foundation of China University of Petroleum, Beijing(2462013YJRC014 ; MOST in China(2009AA093401) ; MOST in China(2009AA093401) ; 90814002) ; 90814002) ; PRP/indep-4-1316) ; PRP/indep-4-1316) ; NSFC(91128210 ; NSFC(91128210 ; Science Foundation of China University of Petroleum, Beijing(2462013YJRC014 ; Science Foundation of China University of Petroleum, Beijing(2462013YJRC014 ; MOST in China(2009AA093401) ; MOST in China(2009AA093401) ; 90814002) ; 90814002) ; PRP/indep-4-1316) ; PRP/indep-4-1316)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/62289]
专题	地质与地球物理研究所_岩石圈演化国家重点实验室
作者单位	1.Peking Univ, Inst Theoret & Appl Geophys, Sch Earth & Space Sci, Beijing 100871, Peoples R China 2.China Univ Petr, State Key Lab Petr Resource & Prospecting, Beijing, Peoples R China 3.China Univ Petr, Unconvent Nat Gas Inst, Beijing, Peoples R China 4.Univ Missouri, Dept Geol Sci, Columbia, MO USA 5.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Tang, Youcai,Zhou, Shiyong,Chen, Y. John,et al. Crustal structures across the western Weihe Graben, North China: Implications for extrusion tectonics at the northeast margin of Tibetan Plateau[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2015,120(7):5070-5081.
APA	Tang, Youcai.,Zhou, Shiyong.,Chen, Y. John.,Sandvol, Eric.,Liang, Xiaofeng.,...&Liu, Mian.(2015).Crustal structures across the western Weihe Graben, North China: Implications for extrusion tectonics at the northeast margin of Tibetan Plateau.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,120(7),5070-5081.
MLA	Tang, Youcai,et al."Crustal structures across the western Weihe Graben, North China: Implications for extrusion tectonics at the northeast margin of Tibetan Plateau".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 120.7(2015):5070-5081.