Identification of an ancient mantle reservoir and young recycled materials in the source region of a young mantle plume: Implications for potential linkages between plume and plate tectonics

doi:10.1016/j.epsl.2013.07.003

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

	Identification of an ancient mantle reservoir and young recycled materials in the source region of a young mantle plume: Implications for potential linkages between plume and plate tectonics
	Wang, Xuan-Ce 1,2; Li, Zheng-Xiang 1,2; Li, Xian-Hua 3; Li, Jie 4; Xu, Yi-Gang 4; Li, Xiang-Hui 3
刊名	EARTH AND PLANETARY SCIENCE LETTERS
	2013-09-01
卷号	377 页码:248-259
关键词	South China Sea Basalts Ancient Mantle Reservoir Hainan Mantle Plume Subducted Oceanic Crust Core-mantle Boundary
DOI	10.1016/j.epsl.2013.07.003
文献子类	Article
英文摘要	Whether or not mantle plumes and plate subduction are genetically linked is a fundamental geoscience question that impinges on our understanding of how the Earth works. Late Cenozoic basalts in Southeast Asia are globally unique in relation to this question because they occur above a seismically detected thermal plume adjacent to deep subducted slabs. In this study, we present new Pb, Sr, Nd, and Os isotope data for the Hainan flood basalts. Together with a compilation of published results, our work shows that less contaminated basaltic samples from the synchronous basaltic eruptions in Hainan-Leizhou peninsula, the Indochina peninsula and the South China Sea seamounts share the same isotopic and geochemical characteristics. They have FOZO-like Sr, Nd, and Pb isotopic compositions (the dominant lower mantle component). These basalts have primitive Pb isotopic compositions that lie on, or very close to, 4.5- to 4.4-Ga geochrons on (207)pb/Pb-204 versus Pb-206/Pb-204 diagram, suggesting a mantle source developed early in Earth's history (4.5-4.4 Ga). Furthermore, our detailed geochemical and Sr, Nd, Pb and Os isotopic analyses suggest the presence of 0.5-0.2 Ga recycled components in the late Cenozoic Hainan plume basalts. This implies a mantle circulation rate of >1 cm/yr, which is similar to that of previous estimates for the Hawaiian mantle plume. The identification of the ancient mantle reservoir and young recycled materials in the source region of these synchronous basalts is consistent with the seismically detected lower mantle-rooted Hainan plume that is adjacent to deep subducted slab-like seismic structures just above the core-mantle boundary. We speculate that the continued deep subduction and the presence of a dense segregated basaltic layer may have triggered the plume to rise from the thermal-chemical pile. This work therefore suggests a dynamic linkage between deep subduction and mantle plume generation. (C) 2013 Elsevier B.V. All rights reserved.
WOS关键词	OCEAN ISLAND BASALTS ; SOUTH CHINA SEA ; OSMIUM-ISOTOPE VARIATIONS ; LARGE IGNEOUS PROVINCES ; LATE-CENOZOIC BASALTS ; TRACE-ELEMENT ; DEEP MANTLE ; HAINAN ISLAND ; HAWAIIAN PLUME ; EARTHS MANTLE
WOS研究方向	Geochemistry & Geophysics
语种	英语
WOS记录号	WOS:000325192100024
资助机构	National Science Foundation of China(41173038 ; National Science Foundation of China(41173038 ; CAS/SAFEA International Partnership Program for Creative Research Teams(KZCX2-YW-Q04-06) ; CAS/SAFEA International Partnership Program for Creative Research Teams(KZCX2-YW-Q04-06) ; ARC(DP110104799) ; ARC(DP110104799) ; ARC DECRA Fellowship through the ARC Centre of Excellence for Core to Crust Fluid Systems (CCFS) ; ARC DECRA Fellowship through the ARC Centre of Excellence for Core to Crust Fluid Systems (CCFS) ; 40803010 ; 40803010 ; 91128203 ; 91128203 ; 40973044) ; 40973044) ; National Science Foundation of China(41173038 ; National Science Foundation of China(41173038 ; CAS/SAFEA International Partnership Program for Creative Research Teams(KZCX2-YW-Q04-06) ; CAS/SAFEA International Partnership Program for Creative Research Teams(KZCX2-YW-Q04-06) ; ARC(DP110104799) ; ARC(DP110104799) ; ARC DECRA Fellowship through the ARC Centre of Excellence for Core to Crust Fluid Systems (CCFS) ; ARC DECRA Fellowship through the ARC Centre of Excellence for Core to Crust Fluid Systems (CCFS) ; 40803010 ; 40803010 ; 91128203 ; 91128203 ; 40973044) ; 40973044)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/62659]
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.Curtin Univ, ARC Ctr Excellence Core Crust Fluid Syst CCFS, Perth, WA 6845, Australia 2.Curtin Univ, Inst Geosci Res TIGeR, Perth, WA 6845, Australia 3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 4.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xuan-Ce,Li, Zheng-Xiang,Li, Xian-Hua,et al. Identification of an ancient mantle reservoir and young recycled materials in the source region of a young mantle plume: Implications for potential linkages between plume and plate tectonics[J]. EARTH AND PLANETARY SCIENCE LETTERS,2013,377:248-259.
APA	Wang, Xuan-Ce,Li, Zheng-Xiang,Li, Xian-Hua,Li, Jie,Xu, Yi-Gang,&Li, Xiang-Hui.(2013).Identification of an ancient mantle reservoir and young recycled materials in the source region of a young mantle plume: Implications for potential linkages between plume and plate tectonics.EARTH AND PLANETARY SCIENCE LETTERS,377,248-259.
MLA	Wang, Xuan-Ce,et al."Identification of an ancient mantle reservoir and young recycled materials in the source region of a young mantle plume: Implications for potential linkages between plume and plate tectonics".EARTH AND PLANETARY SCIENCE LETTERS 377(2013):248-259.