Cerium isotopic fractionation during magmatic processes and the composition of the upper mantle
文献类型：期刊论文
| 作者 | Liu, Fang4; Zhu, Hongli3; Perfit, Michael R.2; Li, Xin4 ; An, Yajun4; Ling, Mingxing1; Zhang, Zhaofeng4
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| 刊名 | EARTH AND PLANETARY SCIENCE LETTERS
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| 出版日期 | 2025-07-01 |
| 卷号 | 661页码:10 |
| 关键词 | Ce stable isotopic composition MORB Fractional crystallization Partial melting Upper mantle BSE |
| ISSN号 | 0012-821X |
| DOI | 10.1016/j.epsl.2025.119365 |
| 通讯作者 | Zhang, Zhaofeng(zzf@cdut.edu.cn) |
| 英文摘要 | Cerium (Ce) is a refractory, incompatible and redox-sensitive element and its isotopes can be used to trace planetary accretion and evolution in the early solar system. A knowledge of the isotopic composition of rocks that sample from the Earth's mantle is a prerequisite to understand curst-mantle evolution. In this study, we present the first comprehensive high-precision Ce stable isotopic compositions of different types of igneous rocks, including sixteen normal mid-ocean ridge basalts (N-MORB) from the East Pacific Rise (EPR) and Juan de Fuca Ridge (JdF), two depleted mid-ocean ridge basalts (D-MORB) from the EPR and Ecuador Rift, seven evolved lavas (basaltic andesites, andesites, and dacites) from the EPR. These igneous rocks, spanning compositions from primitive basalt to evolved dacite with MgO contents decreasing from 8.09 to 0.80 wt. %, display a limited variation in S142Ce from -0.038 to 0.024 %o. Although these rocks have experienced different amounts and proportions of olivine, clinopyroxene, plagioclase, Fe-Ti oxides, and apatite fractional crystallization, no Ce isotopic fractionation was detected. The S142Ce values of MORBs show no correlation with La/Sm(N) or Nb/Y, indicating that partial melting process cannot induce significant Ce isotopic fractionation. Our batch non-modal melting modelling shows that more than 95 % of the Ce budget will be extracted into melt after only 5 % degree of partial melting. Therefore, we conclude that Ce isotopic fractionation during magmatic processes is insignificant and the average S142Ce of studied samples of -0.005 +/- 0.028 %o (2SD, N = 25) can be the best estimate of upper mantle's isotopic composition. Based on simple mass-balance calulation, the Ce isotopic composition of the bulk silicate Earth (BSE) is roughly estimated to be -0.008 +/- 0.025 %o (2SD, propagated error). |
| WOS关键词 | MIDOCEAN RIDGE ; STABLE-ISOTOPE ; OCEAN ISLAND ; FUCA RIDGE ; JUAN ; PERIDOTITE ; PACIFIC ; CE ; GEOCHEMISTRY ; SYSTEMATICS |
| 资助项目 | National Science Foundation of China[42330102] ; National Science Foundation of China[42322302] ; Youth Innovation Promotion Association, Chinese Academy of Sciences[2022207] ; RIDGE2000 program of the National Science Foundation[OCE-0527075] ; RIDGE2000 program of the National Science Foundation[MEDUSA2007] ; NSF[OCE- 9402360] ; NSF[0138088] ; [42473013] ; [9403773] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001475980100001 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/201683]  |
| 专题 | 海洋研究所_深海极端环境与生命过程研究中心 |
| 通讯作者 | Zhang, Zhaofeng |
| 作者单位 | 1.East China Univ Technol, State Key Lab Nucl Resources & Environm, Nanchang 330013, Peoples R China 2.Univ Florida, Dept Geol Sci, Gainesville, FL 32611 USA 3.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Qingdao, Peoples R China 4.Chengdu Univ Technol, Coll Earth & Planetary Sci, Res Ctr Planetary Sci, Chengdu 610059, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Fang,Zhu, Hongli,Perfit, Michael R.,et al. Cerium isotopic fractionation during magmatic processes and the composition of the upper mantle[J]. EARTH AND PLANETARY SCIENCE LETTERS,2025,661:10. |
| APA | Liu, Fang.,Zhu, Hongli.,Perfit, Michael R..,Li, Xin.,An, Yajun.,...&Zhang, Zhaofeng.(2025).Cerium isotopic fractionation during magmatic processes and the composition of the upper mantle.EARTH AND PLANETARY SCIENCE LETTERS,661,10. |
| MLA | Liu, Fang,et al."Cerium isotopic fractionation during magmatic processes and the composition of the upper mantle".EARTH AND PLANETARY SCIENCE LETTERS 661(2025):10. |
入库方式： OAI收割
来源：海洋研究所
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