High-temperature inter-mineral Cr isotope fractionation: A comparison of ionic model predictions and experimental investigations of mantle xenoliths from the North China Craton
文献类型：期刊论文
| 作者 | Shen, Ji1; Qin, Liping1; Fang, Ziyao1; Zhang, Yingnan1; Liu, Jia1; Liu, Wei2; Wang, Fangyue3; Xiao, Yan4; Yu, Huimin1; Wei, Shiqiang2 |
| 刊名 | EARTH AND PLANETARY SCIENCE LETTERS
 |
| 出版日期 | 2018-10-01 |
| 卷号 | 499页码:278-290 |
| 关键词 | chromium isotope inter-mineral fractionation ionic model mantle xenolith XANES |
| ISSN号 | 0012-821X |
| DOI | 10.1016/j.epsl.2018.07.041 |
| 英文摘要 | Recent works have proposed that chromium (Cr) isotopes could be fractionated during peridotite partial melting and basaltic magma crystallization. However, until now, inter-mineral Cr isotope fractionation behavior for major mantle minerals has been poorly constrained. To investigate the mechanism and magnitude of equilibrium inter-mineral Cr isotope fractionation and to explore its implications for planetary mantle and crust lithology evolutions, we performed a systematic study of equilibrium Cr isotope fractionation between major mantle minerals by coupling theoretical ionic modeling with laboratory isotope analyses of natural samples and Cr valence determinations by X-ray absorption near edge spectroscopy (XANES). The ionic model considers both charges and coordination environments of Cr species in mantle minerals, which have proven to be critical factors affecting inter-mineral isotope fractionation. The ionic modeling results predict a general order of spinel (Spl) > pyroxene (Py) >= olivine (Ol) in Cr-53/Cr-52. Systematic Cr isotope analyses of coexisting mantle minerals of seventeen peridotite xenoliths from Beiyan in the North China craton were performed. Chromium isotope results for different mineral pairs of lherzolites (e.g., Delta Cr-53(spl-Ol) of 0.11 parts per thousand to 0.16 parts per thousand, Delta Cr-53(spl-py) of 0.04 parts per thousand to 0.11 parts per thousand and Delta Cr-53(py-Ol) of 0.05 parts per thousand to 0.10 parts per thousand at 870 degrees C to 970 degrees C), document measurable and systematic inter mineral Cr isotope fractionation, in excellent agreement with the modeling results predicted with XANES-determined Cr2+/Sigma Cr values of the mineral separates. This fractionation order could essentially account for Cr isotope behaviors during partial melting and magmatic crystallization observed in terrestrial peridotites and lunar basalts. In contrast, we found that metasomatisms could influence Cr isotope compositions of minerals from Beiyan metasomatized clinopyroxene- (Cpx-) rich lherzolites and wehrlites by means of mineral-melt interaction and/or kinetic diffusion, leading to disequilibrium inter-mineral Cr isotope fractionation. (C) 2018 Elsevier B.V. All rights reserved. |
| WOS关键词 | CHROMIUM ISOTOPES ; OXIDATION-STATE ; PERIDOTITE XENOLITHS ; PLANETARY BASALTS ; EARTHS MANTLE ; OLIVINE ; EQUILIBRIUM ; XANES ; SPINEL ; PYROXENE |
| 资助项目 | National Key R&D Program of China[2016YFC0600404] ; Strategic Priority Research Program (B) of Chinese Academy of Sciences[XDB18000000] ; Chinese Ministry of Science and Technology[2015CB856102] ; National Natural Science Foundation of China[41403001] ; National Natural Science Foundation of China[41673006] ; National Natural Science Foundation of China[41625013] ; National Natural Science Foundation of China[41473066] ; National Natural Science Foundation of China[41571130052] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000444359800025 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | National Key R&D Program of China ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Chinese Ministry of Science and Technology ; National Natural Science Foundation of China ; National Key R&D Program of China ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Chinese Ministry of Science and Technology ; National Natural Science Foundation of China ; National Key R&D Program of China ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Chinese Ministry of Science and Technology ; National Natural Science Foundation of China ; National Key R&D Program of China ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Chinese Ministry of Science and Technology ; National Natural Science Foundation of China |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/88562]  |
| 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 | Shen, Ji; Qin, Liping |
| 作者单位 | 1.Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Crust Mantle Mat & Environm, Hefei 230026, Anhui, Peoples R China 2.Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230026, Anhui, Peoples R China 3.Hefei Univ Technol, Sch Resources & Environm Engn, Ore Deposit & Explorat Ctr ODEC, Hefei 230009, Anhui, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, POB 9825, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shen, Ji,Qin, Liping,Fang, Ziyao,et al. High-temperature inter-mineral Cr isotope fractionation: A comparison of ionic model predictions and experimental investigations of mantle xenoliths from the North China Craton[J]. EARTH AND PLANETARY SCIENCE LETTERS,2018,499:278-290. |
| APA | Shen, Ji.,Qin, Liping.,Fang, Ziyao.,Zhang, Yingnan.,Liu, Jia.,...&Wei, Shiqiang.(2018).High-temperature inter-mineral Cr isotope fractionation: A comparison of ionic model predictions and experimental investigations of mantle xenoliths from the North China Craton.EARTH AND PLANETARY SCIENCE LETTERS,499,278-290. |
| MLA | Shen, Ji,et al."High-temperature inter-mineral Cr isotope fractionation: A comparison of ionic model predictions and experimental investigations of mantle xenoliths from the North China Craton".EARTH AND PLANETARY SCIENCE LETTERS 499(2018):278-290. |
入库方式： OAI收割
来源：地质与地球物理研究所
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