Big insights from tiny peridotites: Evidence for persistence of Precambrian lithosphere beneath the eastern North China Craton

doi:10.1016/j.tecto.2014.05.009

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

	Big insights from tiny peridotites: Evidence for persistence of Precambrian lithosphere beneath the eastern North China Craton
	Liu, Jingao 1,2; Rudnick, Roberta L.1; Walker, Richard J.1; Xu, Wen-liang 3; Gao, Shan 4; Wu, Fu-yuan 5
刊名	TECTONOPHYSICS
	2015-05-26
卷号	650 页码:104-112
关键词	Osmium Peridotites Mantle Xenoliths Tan-lu Fault Lithospheric Thinning North China Craton
DOI	10.1016/j.tecto.2014.05.009
文献子类	Article
英文摘要	Previous studies have shown that the eastern North China Craton (NCC) lost its ancient lithospheric mantle root during the Phanerozoic. The temporal sequence, spatial extent, and cause of the lithospheric thinning, however, continue to be debated. Here we report olivine compositions, whole-rock Re-Os isotopic systematics, and platinum-group element abundances of small (<2 cm in maximum dimension) mantle peridotite xenoliths from two basalt localities from the eastern NCC, Wudi (Cenozoic) and Fuxin (Cretaceous). These locations lie far (similar to 150-200 km) from the Tan-Lu fault, which has been linked to lithospheric replacement in the eastern NCC. Peridotites at both locations have fertile to moderately refractory compositions (Fo < 91.5), while highly refractory (Fo >92) lithospheric mantle is largely absent. Osmium isotopic data suggest the Wudi peridotites experienced melt depletion primarily during the Paleoproterozoic (similar to 1.8 Ga), although an Archean Os model age for one xenolith indicates incorporation of a minor component of Archean lithospheric mantle. These data suggest that a previously unrecognized Paleoproterozoic orogenic event removed and replaced the original Archean lithospheric mantle beneath the sedimentary basin at the southern edge of the Bohai Sea. By contrast, the Fuxin peridotites, entrained in Cretaceous basalts that crop out along the northern edge of the eastern NCC, document the coexistence of both ancient (>= 2.3 Ga) and modern lithospheric mantle components. Here, the original Late Archean-Early Paleoproterozoic lithospheric mantle was, at least partially, removed and replaced prior to 100 Ma. Combined with literature data, our results show that removal of the original Archean lithosphere occurred within Proterozoic collisional orogens, and that replacement of Precambrian lithosphere during the Mesozoic may have been spatially associated with the collisional boundaries and the strike-slip Tan-Lu fault, as well as the onset of Paleo-Pacific plate subduction. (C) 2014 Elsevier B.V. All rights reserved.
WOS关键词	SINO-KOREAN CRATON ; MANTLE BENEATH ; SHANDONG PROVINCE ; ISOTOPIC COMPOSITIONS ; ABYSSAL PERIDOTITES ; TEMPORAL EVOLUTION ; MESOZOIC BASALTS ; ANCIENT MANTLE ; VOLCANIC-ROCKS ; OS ISOTOPES
WOS研究方向	Geochemistry & Geophysics
语种	英语
WOS记录号	WOS:000356121400008
资助机构	U.S. NSF(EAR 0635671 ; U.S. NSF(EAR 0635671 ; China NSF(41330206 ; China NSF(41330206 ; EAR 0911096) ; EAR 0911096) ; 41272077) ; 41272077) ; U.S. NSF(EAR 0635671 ; U.S. NSF(EAR 0635671 ; China NSF(41330206 ; China NSF(41330206 ; EAR 0911096) ; EAR 0911096) ; 41272077) ; 41272077)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/62514]
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.Univ Maryland, Dept Geol, College Pk, MD 20742 USA 2.Univ Alberta, Dept Earth & Atmospher Sci, Edmonton, AB T6G 2E3, Canada 3.Jilin Univ, Coll Earth Sci, Changchun 130061, Peoples R China 4.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China 5.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Liu, Jingao,Rudnick, Roberta L.,Walker, Richard J.,et al. Big insights from tiny peridotites: Evidence for persistence of Precambrian lithosphere beneath the eastern North China Craton[J]. TECTONOPHYSICS,2015,650:104-112.
APA	Liu, Jingao,Rudnick, Roberta L.,Walker, Richard J.,Xu, Wen-liang,Gao, Shan,&Wu, Fu-yuan.(2015).Big insights from tiny peridotites: Evidence for persistence of Precambrian lithosphere beneath the eastern North China Craton.TECTONOPHYSICS,650,104-112.
MLA	Liu, Jingao,et al."Big insights from tiny peridotites: Evidence for persistence of Precambrian lithosphere beneath the eastern North China Craton".TECTONOPHYSICS 650(2015):104-112.