Processes controlling highly siderophile element fractionations in xenolithic peridotites and their influence on Os isotopes
文献类型：期刊论文
| 作者 | Liu, Jingao1; Rudnick, Roberta L.1; Walker, Richard J.1; Gao, Shan2; Wu, Fuyuan3; Piccoli, Philip M.1 |
| 刊名 | EARTH AND PLANETARY SCIENCE LETTERS
 |
| 出版日期 | 2010-08-15 |
| 卷号 | 297期号:1-2页码:287-297 |
| 关键词 | HSE Os isotopes peridotite xenoliths sulfide breakdown North China Craton |
| ISSN号 | 0012-821X |
| DOI | 10.1016/j.epsl.2010.06.030 |
| 文献子类 | Article |
| 英文摘要 | Xenolithic peridotites having a similar range of major element compositions from two nearby localities in the Trans-North China Orogen, North China Craton, provide a rare opportunity to explore effects resulting from both primary partial melting and secondary processes on Os isotopes and highly siderophile element (HSE) abundances. HSE patterns of peridotites from Hannuoba are similar to those of orogenic peridotite massifs worldwide, but are rare for xenolithic peridotites. These patterns can be explained by relatively low degrees of melt depletion, coupled with long-term preservation of sulfides. By contrast, peridotites from Yangyuan have major element compositions similar to or slightly more depleted than Hannuoba xenoliths, but are characterized by distinct, highly fractionated HSE patterns with lower total HSE abundances and Os, Pd and Re depletions relative to Ir. Some of the latter HSE characteristics must reflect secondary processes. The low S and Se contents of Yangyuan peridotites, coupled with scarcity of observable sulfides, suggest that they experienced sulfide breakdown, possibly as a result of interaction with a S-undersaturated melt/fluid. This may have occurred under oxidizing conditions, as suggested by the somewhat higher 102 recorded in the Yangyuan peridotites compared to the Hannuoba peridotites. as well as the metal-deficient composition of rare, mono-sulfide-solid solution (mss) sulfides within the Yangyuan peridotites. We speculate that under such conditions, Os, Pd, and possibly Re, more strongly partition into a sulfide liquid, or the oxidizing medium (melt or fluid), than It and Pt and, thus, become depleted. These effects would have been imposed on original patterns that were similar to those in the Hannuoba suite. The good correlation between (187)Os/(188)Os and major element indices of melt depletion in the Yangyuan rocks, coupled with the poor correlation between (187)Os/(188)Os and (187)Re/(188)Os, suggests that the S. Os, Pd and Re removal was recent. Hence, the long-term Re-Os isotopic systematics of these rocks would not have been affected, and Re depletion model ages, based on Os isotopes, remain viable to constrain the timing of melt deletion in these peridotites. The similarity of model age distributions between Yangyuan and Hannuoba peridotites (T(RD) = 0 to 1.7 and 0 to 1.5 Ga, respectively) is consistent with this, and further indicates that these peridotites formed in the Paleoproterozoic. (C) 2010 Elsevier B.V. All rights reserved. |
| WOS关键词 | PLATINUM-GROUP ELEMENTS ; NORTH CHINA CRATON ; LITHOSPHERIC MANTLE BENEATH ; MONOSULFIDE SOLID-SOLUTION ; EARTHS UPPER-MANTLE ; RE-OS ; MELT PERCOLATION ; EASTERN CHINA ; SUBCONTINENTAL MANTLE ; MAGMATIC TEMPERATURES |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000282110100028 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | NSF(EAR 0635671 ; NSF(EAR 0635671 ; National Nature Science Foundation of China(40821061 ; National Nature Science Foundation of China(40821061 ; Ministry of Education of China(B07039) ; Ministry of Education of China(B07039) ; EAR 0911096) ; EAR 0911096) ; 90714010) ; 90714010) ; NSF(EAR 0635671 ; NSF(EAR 0635671 ; National Nature Science Foundation of China(40821061 ; National Nature Science Foundation of China(40821061 ; Ministry of Education of China(B07039) ; Ministry of Education of China(B07039) ; EAR 0911096) ; EAR 0911096) ; 90714010) ; 90714010) ; NSF(EAR 0635671 ; NSF(EAR 0635671 ; National Nature Science Foundation of China(40821061 ; National Nature Science Foundation of China(40821061 ; Ministry of Education of China(B07039) ; Ministry of Education of China(B07039) ; EAR 0911096) ; EAR 0911096) ; 90714010) ; 90714010) ; NSF(EAR 0635671 ; NSF(EAR 0635671 ; National Nature Science Foundation of China(40821061 ; National Nature Science Foundation of China(40821061 ; Ministry of Education of China(B07039) ; Ministry of Education of China(B07039) ; EAR 0911096) ; EAR 0911096) ; 90714010) ; 90714010) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/72620]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Liu, Jingao |
| 作者单位 | 1.Univ Maryland, Dept Geol, College Pk, MD 20742 USA 2.China Univ Geosci, Fac Earth Sci, Wuhan 430074, Peoples R China 3.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. Processes controlling highly siderophile element fractionations in xenolithic peridotites and their influence on Os isotopes[J]. EARTH AND PLANETARY SCIENCE LETTERS,2010,297(1-2):287-297. |
| APA | Liu, Jingao,Rudnick, Roberta L.,Walker, Richard J.,Gao, Shan,Wu, Fuyuan,&Piccoli, Philip M..(2010).Processes controlling highly siderophile element fractionations in xenolithic peridotites and their influence on Os isotopes.EARTH AND PLANETARY SCIENCE LETTERS,297(1-2),287-297. |
| MLA | Liu, Jingao,et al."Processes controlling highly siderophile element fractionations in xenolithic peridotites and their influence on Os isotopes".EARTH AND PLANETARY SCIENCE LETTERS 297.1-2(2010):287-297. |
入库方式： OAI收割
来源：地质与地球物理研究所
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