Application of Eu anomaly in Geology
文献类型：期刊论文
| 作者 | Zheng FangShun1; Song GuoXue1,2 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2023-09-01 |
| 卷号 | 39期号:9页码:2832-2856 |
| ISSN号 | 1000-0569 |
| DOI | 10.18654/1000-0569/2023.09.17 |
| 英文摘要 | Eu is the most concerned variable valence rare earth element (Eu, Eu2+ and Eu3+) in the geological science. For a long time, "Eu anomaly" (delta Eu) has been widely used as an important geochemical parameter to finely characterize geological processes. It is generally believed that the existence and stability of Eu2+ in natural environments are the main causes of "Eu anomaly". However, recent literatures have shown that many explanations for the cause of "Eu anomaly" are vague and even contradictory. On the basis of the definition and calculation formula of "Eu anomaly", this article summarizes the application status of Eu anomaly and related experimental geochemical results in different geological processes, including magma evolution, hydrothermal action, sedimentation, metamorphism and weathering. Comprehensive research shows that the main factors causing "Eu anomaly" in different geological processes are summarized as follows: (1) Eu content in parent magma (melt/fluid); (2) crystallization chemistry effects (ionic radius) of different mineral phases; (3) temperature-pressure; (4) oxidation-reduction conditions (oxygen, sulfur fugacity); (5) water-rock interaction; (6) fluid acidity and alkalinity (pH value); (7) complexation; (8) adsorption; (9) weathering; and (10) nebular condensation and volatilization, etc. Quantitative expression and application of " Eu anomaly" involves the precise determination of Eu2+ and Eu3+ in magma, melt/fluid or minerals. However, looking at many testing methods currently applied in Earth science, there is still a lack of feasible methods for accurately determining the content of Eu2+ and Eu3+ in the research objects, except for X-ray absorption spectroscopy (XAS) which can determine the relative content of Eu2+ and Eu3+ in situ. Therefore, experimental geochemistry presents a new method to solve the problem of "Eu anomaly". Simulation of important geological processes using melt/fluid with known Eu2+ and Eu3+ contents can effectively reveal the key limiting factors of "Eu anomaly" changes. |
| WOS关键词 | RARE-EARTH-ELEMENTS ; EUROPIUM ANOMALIES ; OXIDATION-STATE ; LOCAL-STRUCTURE ; IRON-FORMATIONS ; GEOCHEMISTRY ; ZIRCON ; OXYGEN ; ROCKS ; REE |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001059083200017 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/110813]  |
| 专题 | 地质与地球物理研究所_中国科学院矿产资源研究重点实验室 |
| 通讯作者 | Song GuoXue |
| 作者单位 | 1.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zheng FangShun,Song GuoXue. Application of Eu anomaly in Geology[J]. ACTA PETROLOGICA SINICA,2023,39(9):2832-2856. |
| APA | Zheng FangShun,&Song GuoXue.(2023).Application of Eu anomaly in Geology.ACTA PETROLOGICA SINICA,39(9),2832-2856. |
| MLA | Zheng FangShun,et al."Application of Eu anomaly in Geology".ACTA PETROLOGICA SINICA 39.9(2023):2832-2856. |
入库方式： OAI收割
来源：地质与地球物理研究所
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