The formation of magnetite in the early Archean oceans
文献类型：期刊论文
| 作者 | Li, Yi-Liang1; Konhauser, Kurt O.2; Zhai, Mingguo3 |
| 刊名 | EARTH AND PLANETARY SCIENCE LETTERS
 |
| 出版日期 | 2017-05-15 |
| 卷号 | 466页码:103-114 |
| 关键词 | Archean banded iron formation photosynthetic Fe(II)-oxidation magnetite green rust deep-sea hydrothermal fluid |
| ISSN号 | 0012-821X |
| DOI | 10.1016/j.epsl.2017.03.013 |
| 文献子类 | Article |
| 英文摘要 | Banded iron formations (BIFs) are iron- and silica-rich chemical sedimentary rocks that were deposited throughout much of the Precambrian. The biological oxidation of dissolved Fe(II) led to the precipitation of a ferric oxyhydroxide phase, such as ferrihydrite, in the marine photic zone. Upon burial, ferrihydrite was either transformed into hematite through dehydration or it was reduced to magnetite via biological or abiological Fe(III) reduction coupled to the oxidation of buried microbial biomass. However, it has always been intriguing as to why the oldest BIFs are characteristically magnetite-rich, while BIFs formed after the Neoarchean are dominated by hematite. Here, we propose that some magnetite in early Archean BIF could have precipitated directly from seawater through the reaction of settling ferrihydrite and hot, Fe(II)-rich hydrothermal fluids that existed in the deeper waters. We conducted experiments that showed the reaction of Fe(II) with biogenic ferric iron mats under strict anoxic conditions lead to the formation of a metastable green rust phase that within hours transformed into magnetite. Our model further posits that with the progressive cooling and oxidation of the Earth's oceans, the above reaction shuts off, and magnetite was subsequently restricted to reactions associated with diagenesis and metamorphism. (C) 2017 Elsevier B.V. All rights reserved. |
| WOS关键词 | BANDED-IRON-FORMATIONS ; GREEN RUST ; WESTERN-AUSTRALIA ; FE(III) MINERALS ; DEPOSITION ; TRANSFORMATION ; HEMATITE ; GEOCHEMISTRY ; METAMORPHISM ; TEMPERATURE |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000400225800011 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | General Research Fund from Research Grants Council of Hong Kong(HKU702913P) ; Discovery Grant from the Natural Sciences and Engineering Research Council of Canada(DG165831) ; Chinese Academy of Sciences(XDB18030205 ; QYZDY-SSW-DQco17) ; General Research Fund from Research Grants Council of Hong Kong(HKU702913P) ; Discovery Grant from the Natural Sciences and Engineering Research Council of Canada(DG165831) ; Chinese Academy of Sciences(XDB18030205 ; QYZDY-SSW-DQco17) ; General Research Fund from Research Grants Council of Hong Kong(HKU702913P) ; Discovery Grant from the Natural Sciences and Engineering Research Council of Canada(DG165831) ; Chinese Academy of Sciences(XDB18030205 ; QYZDY-SSW-DQco17) ; General Research Fund from Research Grants Council of Hong Kong(HKU702913P) ; Discovery Grant from the Natural Sciences and Engineering Research Council of Canada(DG165831) ; Chinese Academy of Sciences(XDB18030205 ; QYZDY-SSW-DQco17) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/42207]  |
| 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 | Li, Yi-Liang |
| 作者单位 | 1.Univ Hong Kong, Dept Earth Sci, Hong Kong, Hong Kong, Peoples R China 2.Univ Alberta, Dept Earth & Atmospher Sci, Edmonton, AB, Canada 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Yi-Liang,Konhauser, Kurt O.,Zhai, Mingguo. The formation of magnetite in the early Archean oceans[J]. EARTH AND PLANETARY SCIENCE LETTERS,2017,466:103-114. |
| APA | Li, Yi-Liang,Konhauser, Kurt O.,&Zhai, Mingguo.(2017).The formation of magnetite in the early Archean oceans.EARTH AND PLANETARY SCIENCE LETTERS,466,103-114. |
| MLA | Li, Yi-Liang,et al."The formation of magnetite in the early Archean oceans".EARTH AND PLANETARY SCIENCE LETTERS 466(2017):103-114. |
入库方式： OAI收割
来源：地质与地球物理研究所
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