Hf-Nd isotopic decoupling in continental mantle lithosphere beneath Northeast China: Effects of pervasive mantle metasomatism
文献类型：期刊论文
| 作者 | Yu, Song-Yue1,2; Xu, Yi-Gang1; Huang, Xiao-Long1; Ma, Jin-Long1; Ge, Wen-Chun3; Zhang, Hui-Huang4; Qin, Xiu-Feng1 |
| 刊名 | JOURNAL OF ASIAN EARTH SCIENCES
 |
| 出版日期 | 2009-08-26 |
| 卷号 | 35期号:6页码:554-570 |
| 关键词 | Peridotite xenoliths Geochemistry Hf-Nd isotopic decoupling Chromatographic metasomatism Lithospheric mantle NE China |
| ISSN号 | 1367-9120 |
| DOI | 10.1016/j.jseaes.2009.04.005 |
| 文献子类 | Article |
| 英文摘要 | Nd-Hf isotopic decoupling has frequently been observed in the continental and oceanic mantle, but its origin remains controversial. Here we present combined elemental and Sr-Nd-Hf isotopic study on peridotite xenoliths entrained in Cenozoic basalts from Shuangliao and Jiaohe in Northeast China, which provides insight into this issue. The data reveal a heterogeneous lithospheric mantle beneath Northeastern China, consisting of fertile (type I) to strongly refractory (type II) peridotites. Type I peridotites are largely shielded from late metasomatism, thus preserving information of depletion events. Nd model age suggests a Proterozoic lithospheric mantle beneath NE China. Type II peridotites are mostly refractory harz-burgites and show ubiquitous enrichment of incompatible elements. They are further divided into two sub-groups. Clinopyroxenes from type IIa samples have high and wide Lu/Hf (0.34-1.3) and very radiogenic Hf isotopic ratios (epsilon(Hf) = 44.4-63.8). Hf concentration is generally low (0.12-0.43 ppm) and plots along or slightly above the modeled partial melting depletion trend. In contrast, Nd content in type IIa clinopyroxenes is significantly higher than the modeled concentrations in residues at a given degree of melt depletion. The difference in enrichment of Hf and Nd translates to decoupling of Lu/Hf-Sm/Nd ratios and of Nd-Hf isotopes (epsilon(Nd) = -1.3 to 8.4). Clinopyroxenes from most of type fib peridotites have relatively low Lu/Hf ratios (0.04-0.24) and coupled Nd-Hf isotopes. Both Hf and Nd plot significantly above the depletion trend; their concentrations are governed by the equilibrium partitioning between percolating melt and peridotites. The distinct geochemical characteristics of type IIa and type IIb clinopyroxenes may have resulted from chromatographic percolation of small volumes of silicate melts, in which percolation fronts of incompatible elements are dependent on their relative incompatibilities. (C) 2009 Elsevier Ltd. All rights reserved. |
| WOS关键词 | SPINEL-PERIDOTITE XENOLITHS ; SMALL MELT FRACTIONS ; EASTERN CHINA ; TRACE-ELEMENT ; NE CHINA ; SUBCONTINENTAL LITHOSPHERE ; ABYSSAL PERIDOTITES ; REFRACTORY MANTLE ; HIGH-TEMPERATURE ; ORTHO-PYROXENE |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000267813800006 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | National Science Foundation of China(70914001 ; National Science Foundation of China(70914001 ; CAS/SAFEA International Partnership Program for Creative Research Teams ; CAS/SAFEA International Partnership Program for Creative Research Teams ; 40673038) ; 40673038) ; National Science Foundation of China(70914001 ; National Science Foundation of China(70914001 ; CAS/SAFEA International Partnership Program for Creative Research Teams ; CAS/SAFEA International Partnership Program for Creative Research Teams ; 40673038) ; 40673038) ; National Science Foundation of China(70914001 ; National Science Foundation of China(70914001 ; CAS/SAFEA International Partnership Program for Creative Research Teams ; CAS/SAFEA International Partnership Program for Creative Research Teams ; 40673038) ; 40673038) ; National Science Foundation of China(70914001 ; National Science Foundation of China(70914001 ; CAS/SAFEA International Partnership Program for Creative Research Teams ; CAS/SAFEA International Partnership Program for Creative Research Teams ; 40673038) ; 40673038) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/70984]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Xu, Yi-Gang |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Isotope Geochronol & Geochem, Guangzhou 510640, Guangdong, Peoples R China 2.Chinese Acad Sci, Inst Geochem, State Key Lab Ore Deposit Geochem, Guiyang 550002, Peoples R China 3.Jilin Univ, Coll Earth Sci, Changchun 130061, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, Song-Yue,Xu, Yi-Gang,Huang, Xiao-Long,et al. Hf-Nd isotopic decoupling in continental mantle lithosphere beneath Northeast China: Effects of pervasive mantle metasomatism[J]. JOURNAL OF ASIAN EARTH SCIENCES,2009,35(6):554-570. |
| APA | Yu, Song-Yue.,Xu, Yi-Gang.,Huang, Xiao-Long.,Ma, Jin-Long.,Ge, Wen-Chun.,...&Qin, Xiu-Feng.(2009).Hf-Nd isotopic decoupling in continental mantle lithosphere beneath Northeast China: Effects of pervasive mantle metasomatism.JOURNAL OF ASIAN EARTH SCIENCES,35(6),554-570. |
| MLA | Yu, Song-Yue,et al."Hf-Nd isotopic decoupling in continental mantle lithosphere beneath Northeast China: Effects of pervasive mantle metasomatism".JOURNAL OF ASIAN EARTH SCIENCES 35.6(2009):554-570. |
入库方式： OAI收割
来源：地质与地球物理研究所
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