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Differentiation of the early silicate Earth as recorded by Nd-142-Nd-143 in 3.8-3.0 Ga rocks from the Anshan Complex, North China Craton

文献类型：期刊论文

作者Li, Chao-Feng1; Wang, Xuan-Ce2,3; Wilde, Simon A.2; Li, Xian-Hua1; Wang, Ya-Fei1; Li, Zhen2,3
刊名PRECAMBRIAN RESEARCH
出版日期2017-10-01
卷号301页码:86-101
关键词Sm-147-nd-143 And Sm-146-nd-142 Isotope Systems Anshan Complex Primordial Silicate Earth Differentiation Of The Early Silicate Earth Incompatible Trace Elements
ISSN号0301-9268
DOI10.1016/j.precamres.2017.09.001
文献子类Article
英文摘要The Archean Anshan Complex in the northeastern part of the North China Craton is one of the few areas on Earth where rocks older than 3.8 Ga have been identified, and thus it provides a rare opportunity to determine the relative roles of primordial silicate differentiation versus progressive differentiation in shaping the Earth's chemical architecture. We undertook (142HTC)'FORTITLEHTC_RETAIN Nd-143 isotopes and major and trace element analyses on well-dated 3.81-3.0 Ga Anshan rocks. This study is the first to report significant positive Nd-142 anomalies in the Anshan Complex of up to +9.2 +/- 2.8 ppm relative to the modern accessible Earth. The most prominent feature is that the Nd-143 isotopes tighdy correlate with incompatible trace element ratios. Trends of e Nd-143(t) as a function of incompatible trace element ratios reveal that the Anshan source consists of high-and low-mu Nd-142 end-members. The high-mu Nd-142 end-member had mu Nd-142 = +15 and epsilon Nd-143(t) = +10 and is characterized by highly enriched incompatible trace element ratios, similar to average early Archean upper continental crust, suggesting a crustal origin. The low-mu Nd-142 end-member had mu Nd-142 <= -4 and epsilon Nd-143(t) <= 0 and is characterized by depleted incompatible trace elements. Both Nd-142,Nd-143 isotopes and incompatible trace element ratios of the low-mu Nd-142 end-member are similar to that of Barbteron komatiites derived from an early-formed and deep-seated mantle reservoir. Furthermore, the estimated incompatible trace element ratios of the low-mu Nd-142 end-member are similar to that of a 4.5-4.4 Ga dense melt that was possibly preserved above the core-mantle boundary. The relationships between Sm-147-Nd-143, Sm-146-Nd-142, and incompatible trace elements provide important constraints on both primary silicate differentiation within 100-150 Ma of solar system formation and late Hadean and early Archean mantle-crust differentiation events. Coupled Sm-147-Nd-143 and Sm-146-Nd-142 systematics suggest ca. 4.5-4.4 Ga model ages for the precursor of the oldest components of the Anshan Complex, whereas decoupled Sm-147-Nd-143, Sm-146-Nd-142, and trace element systematics imply multiple mantle-crust differentiation events from 4.3 to 3.8 Ga.
WOS关键词IONIZATION MASS-SPECTROMETRY ; SIDEROPHILE ELEMENT ABUNDANCES ; TUNGSTEN ISOTOPIC COMPOSITION ; LARGE IGNEOUS PROVINCE ; SM-146 HALF-LIFE ; ZIRCON U-PB ; MANTLE RESERVOIR ; CHEMICAL GEODYNAMICS ; BARBERTON KOMATIITES ; NORTHEASTERN CHINA
WOS研究方向Geology
语种英语
WOS记录号WOS:000413878400006
出版者ELSEVIER SCIENCE BV
资助机构National Natural Science Foundation of China(41373020 ; National Natural Science Foundation of China(41373020 ; Australian Research Council (ARC) Future Fellowship(FT140100826) ; Australian Research Council (ARC) Future Fellowship(FT140100826) ; Fundamental Research Funds for the Central Universities (program for Innovative Research Team of Chemical Geodynamics and Earth Resources)(310827163412) ; Fundamental Research Funds for the Central Universities (program for Innovative Research Team of Chemical Geodynamics and Earth Resources)(310827163412) ; 41521062) ; 41521062) ; National Natural Science Foundation of China(41373020 ; National Natural Science Foundation of China(41373020 ; Australian Research Council (ARC) Future Fellowship(FT140100826) ; Australian Research Council (ARC) Future Fellowship(FT140100826) ; Fundamental Research Funds for the Central Universities (program for Innovative Research Team of Chemical Geodynamics and Earth Resources)(310827163412) ; Fundamental Research Funds for the Central Universities (program for Innovative Research Team of Chemical Geodynamics and Earth Resources)(310827163412) ; 41521062) ; 41521062) ; National Natural Science Foundation of China(41373020 ; National Natural Science Foundation of China(41373020 ; Australian Research Council (ARC) Future Fellowship(FT140100826) ; Australian Research Council (ARC) Future Fellowship(FT140100826) ; Fundamental Research Funds for the Central Universities (program for Innovative Research Team of Chemical Geodynamics and Earth Resources)(310827163412) ; Fundamental Research Funds for the Central Universities (program for Innovative Research Team of Chemical Geodynamics and Earth Resources)(310827163412) ; 41521062) ; 41521062) ; National Natural Science Foundation of China(41373020 ; National Natural Science Foundation of China(41373020 ; Australian Research Council (ARC) Future Fellowship(FT140100826) ; Australian Research Council (ARC) Future Fellowship(FT140100826) ; Fundamental Research Funds for the Central Universities (program for Innovative Research Team of Chemical Geodynamics and Earth Resources)(310827163412) ; Fundamental Research Funds for the Central Universities (program for Innovative Research Team of Chemical Geodynamics and Earth Resources)(310827163412) ; 41521062) ; 41521062)
源URL[http://ir.iggcas.ac.cn/handle/132A11/62460]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Wang, Xuan-Ce
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Curtin Univ, Dept Appl Geol, Inst Geosci Res TIGeR, GPO Box U1987, Perth, WA 6845, Australia
3.Changan Univ, Sch Earth Sci & Resources, Xian 710054, Shaanxi, Peoples R China
推荐引用方式
GB/T 7714		 Li, Chao-Feng,Wang, Xuan-Ce,Wilde, Simon A.,et al. Differentiation of the early silicate Earth as recorded by Nd-142-Nd-143 in 3.8-3.0 Ga rocks from the Anshan Complex, North China Craton[J]. PRECAMBRIAN RESEARCH,2017,301:86-101.
APA Li, Chao-Feng,Wang, Xuan-Ce,Wilde, Simon A.,Li, Xian-Hua,Wang, Ya-Fei,&Li, Zhen.(2017).Differentiation of the early silicate Earth as recorded by Nd-142-Nd-143 in 3.8-3.0 Ga rocks from the Anshan Complex, North China Craton.PRECAMBRIAN RESEARCH,301,86-101.
MLA Li, Chao-Feng,et al."Differentiation of the early silicate Earth as recorded by Nd-142-Nd-143 in 3.8-3.0 Ga rocks from the Anshan Complex, North China Craton".PRECAMBRIAN RESEARCH 301(2017):86-101.

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来源：地质与地球物理研究所

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