A nephelinitic component with unusual delta(56) Fe in Cenozoic basalts from eastern China and its implications for deep oxygen cycle
文献类型：期刊论文
| 作者 | He, Yongsheng1; Meng, Xunan1; Ke, Shan1; Wu, Hongjie1; Zhu, Chuanwei1; Teng, Fang-Zhen2; Hoefs, Jochen3; Huang, Jian4; Yang, Wei5; Xu, Lijuan1 |
| 刊名 | EARTH AND PLANETARY SCIENCE LETTERS
 |
| 出版日期 | 2019-04-15 |
| 卷号 | 512页码:175-183 |
| ISSN号 | 0012-821X |
| 关键词 | iron isotopes oxidized peridotitic source deep carbon freezing deep oxygen cycle atmospheric oxygenation |
| DOI | 10.1016/j.epsl.2019.02.009 |
| 英文摘要 | Cycling of elements with multiple valences (e.g., Fe, C, and S) through subduction and magmatism may dictate the redox evolution of the deep mantle and atmosphere. To investigate the potential of Fe isotopes as a tracer of such cycles, here we report Fe isotopic compositions of thirty-seven Cenozoic basalts from eastern China. A nephelinitic melt component with delta(56) Fe up to 0.29 has been identified, which cannot be explained by weathering, alteration, magma differentiation, or chemical diffusion. Its low Fe/Mn similar to 58, relatively low TiO2 and high Na2O + K2O argue against a significant contribution of pyroxenite melting. Instead, the heavy Fe component requires enhanced isotope fractionation during partial melting of a peridotitic source with Fe-3 +/Sigma Fe >= 0.15. Low Ba/Th similar to 50 and depleted Sr-87/Sr-86(i) and epsilon(Nd )(t) suggest that the source was insignificantly affected by hydrous fluids and recycled terrigenous sediments. The heavy Fe component is known to be unique in its low delta(26) Mg and high delta(66) Zn and indicates hybridization by recycled carbonates. The source Fe-3+/Sigma Fe was most likely enhanced at cost of reduction of recycled carbonates to diamonds in a mantle depth >= 300 km. The origin of the heavy Fe component illustrates a pathway with net transportation of oxidizer back to Earth's surface: CO2 (in carbonates) -> C (as diamond frozen in the deep mantle) + O-2 (ferric Fe being scavenged by melt extraction). Secular cooling of global subduction zones may have stepwisely increased the efficiency of this carbon driven deep oxygen cycle in the past, providing an alternative explanation for the rise of atmospheric O-2. (C) 2019 Elsevier B.V. All rights reserved. |
| WOS关键词 | IRON ISOTOPE FRACTIONATION ; MAGMATIC DIFFERENTIATION ; OXIDATION-STATE ; MANTLE ; REDOX ; WATER ; GEOCHEMISTRY ; TRANSITION ; PERIDOTITE ; EVOLUTION |
| 资助项目 | National Natural Science Foundation of China[41730214] ; National Natural Science Foundation of China[41688103] ; National Natural Science Foundation of China[41473016] ; National Natural Science Foundation of China[41230209] ; National Key R&D Program of China[2016YFC0600408] ; State Key Laboratory of Geological Processes and Mineral Resources |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE BV |
| WOS记录号 | WOS:000462106300017 |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; State Key Laboratory of Geological Processes and Mineral Resources ; State Key Laboratory of Geological Processes and Mineral Resources ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; State Key Laboratory of Geological Processes and Mineral Resources ; State Key Laboratory of Geological Processes and Mineral Resources ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; State Key Laboratory of Geological Processes and Mineral Resources ; State Key Laboratory of Geological Processes and Mineral Resources ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; State Key Laboratory of Geological Processes and Mineral Resources ; State Key Laboratory of Geological Processes and Mineral Resources |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/91098]  |
| 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 | He, Yongsheng; Li, Shuguang |
| 作者单位 | 1.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China 2.Univ Washington, Dept Earth & Space Sci, Isotope Lab, Seattle, WA 98195 USA 3.Univ Gottingen, Dept Geosci, Goldschmidtstr 1, D-37077 Gottingen, Germany 4.Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Crust Mantle Mat & Environm, Hefei 230026, Anhui, Peoples R China 5.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, POB 9825, Beijing 100029, Peoples R China 6.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Mineral & Metallogeny, Guangzhou 510640, Guangdong, Peoples R China |
| 推荐引用方式 GB/T 7714 | He, Yongsheng,Meng, Xunan,Ke, Shan,et al. A nephelinitic component with unusual delta(56) Fe in Cenozoic basalts from eastern China and its implications for deep oxygen cycle[J]. EARTH AND PLANETARY SCIENCE LETTERS,2019,512:175-183. |
| APA | He, Yongsheng.,Meng, Xunan.,Ke, Shan.,Wu, Hongjie.,Zhu, Chuanwei.,...&Li, Shuguang.(2019).A nephelinitic component with unusual delta(56) Fe in Cenozoic basalts from eastern China and its implications for deep oxygen cycle.EARTH AND PLANETARY SCIENCE LETTERS,512,175-183. |
| MLA | He, Yongsheng,et al."A nephelinitic component with unusual delta(56) Fe in Cenozoic basalts from eastern China and its implications for deep oxygen cycle".EARTH AND PLANETARY SCIENCE LETTERS 512(2019):175-183. |
入库方式： OAI收割
来源：地质与地球物理研究所
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