Hf-W isotopic constraints on early evolution of the Earth

	Hf-W isotopic constraints on early evolution of the Earth
	Mei QingFeng 1,2,3; Yang JinHui 1,2,3
刊名	ACTA PETROLOGICA SINICA
	2018
卷号	34 期号:1 页码:207-216
关键词	Extinct nuclides Core-mantle differentiation Lunar-forming giant impact Late veneer model
ISSN号	1000-0569
文献子类	Article
英文摘要	As one of the short-lived radioactive systems, Hf-182- W-182 system can well constrain the accretion and differentiation processes in the evolution of the early Earth. Based on the review of Hf-W isotopic evolution characteristics and W isotopic compositions of the lunar- and terrestrial- mantle, we suggest that the continuity and openness of the Earth's core-mantle differentiation process induce the uncertainties of dating it using the Hf-182 W-182 chronology. To acquire temporal information of the lunar-forming giant impact depends on the knowledge of Hf/W ratios of the bulk silicate Moon and Earth. We also discuss the mechanisms of W isotopic heterogeneity in the Earth's mantle and suggest that W isotopic anomalies in terrestrial rocks may be inherited from the Earth's mantle prior to the late veneer, or be the radiogenic results of source regions obtaining diverse Hf/W ratios during the lifetime of Hf-182. These conclusions provide critical constraints on the formation and evolution of terrestrial planets.
WOS关键词	EARLY CORE FORMATION ; SIDEROPHILE ELEMENT ABUNDANCES ; EARLY MANTLE DIFFERENTIATION ; TERRESTRIAL PLANET FORMATION ; COSMIC-RAY PRODUCTION ; FORMING GIANT IMPACT ; BULK SILICATE EARTH ; EARLY SOLAR-SYSTEM ; TUNGSTEN ISOTOPES ; MAGMA OCEAN
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000424882800018
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/82812]
专题	中国科学院地质与地球物理研究所
通讯作者	Yang JinHui
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Mei QingFeng,Yang JinHui. Hf-W isotopic constraints on early evolution of the Earth[J]. ACTA PETROLOGICA SINICA,2018,34(1):207-216.
APA	Mei QingFeng,&Yang JinHui.(2018).Hf-W isotopic constraints on early evolution of the Earth.ACTA PETROLOGICA SINICA,34(1),207-216.
MLA	Mei QingFeng,et al."Hf-W isotopic constraints on early evolution of the Earth".ACTA PETROLOGICA SINICA 34.1(2018):207-216.