| 铬同位素在高温岩浆过程中的研究进展 |
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| 引用本文： | 史凯,徐丽娟,苏煜雯,刘春阳,马海波,刘盛遨.铬同位素在高温岩浆过程中的研究进展[J].地学前缘,2022,29(1):364-376. |
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| 作者姓名： | 史凯 徐丽娟 苏煜雯 刘春阳 马海波 刘盛遨 |
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| 作者单位： | 1.中国地质大学(北京) 科学研究院, 北京 1000832.中国地质大学(北京) 地质过程与矿产资源国家重点实验室, 北京 100083 |
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| 基金项目： | 国家重点研发计划;国家自然科学基金 |
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| 摘 要： | 铬(Cr)属于氧化还原敏感元素,在岩浆过程中是一种中度相容和轻度亲铁元素。Cr在硅酸盐地球中主要有三种价态:Cr2+、Cr3+和Cr6+。Cr存在于不同来源的矿物和岩石中,其氧化还原状态和同位素组成可以为其成因、氧化还原条件和相关成矿历史提供有价值的信息。近年来,铬同位素越来越多地应用到现代环境、古环境、行星的演化以及高温地质过程等领域中,而高温地质过程中储库的铬同位素及其分馏机理研究是其他工作的基础。尤其是随着质谱技术的发展,Cr同位素在高温环境中的分馏机制及行为也引起了更多的关注。本文主要介绍不同储库的Cr同位素组成及高温岩浆过程中Cr同位素研究的最新进展。
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| 关 键 词： | 铬同位素 同位素分馏 高温岩浆 地幔 地壳 |
| 收稿时间： | 2020-09-09 |
Research progress on Cr isotopes in high temperature magmatic processes:A review |
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| SHI Kai,XU Lijuan,SU Yuwen,LIU Chunyang,MA Haibo,LIU Sheng'ao.Research progress on Cr isotopes in high temperature magmatic processes:A review[J].Earth Science Frontiers,2022,29(1):364-376. |
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| Authors: | SHI Kai XU Lijuan SU Yuwen LIU Chunyang MA Haibo LIU Sheng'ao |
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| Institution: | 1. Institute of Earth Sciences, China University of Geosciences (Beijing), Beijing 100083, China2. State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences (Beijing), Beijing 100083, China |
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| Abstract: | Chromium (Cr) is a redox active transition metal, a moderately compatible, slightly ferriphilic element in magmatic processes. Cr occurs in three valence states in the silicate Earth: bivalent Cr(II), trivalent Cr(III) and hexavalent Cr(VI). It can be found in various minerals and rocks with different origins, thus Cr isotopes can provide valuable information on the genesis, redox condition and mineralization history of these Earth materials. To date, Cr isotopes have been widely used in various research fields, including modern environment, paleoenvironment, planetary evolution, and high-temperature geological processes. Understanding of Cr isotope geochemistry in magmatic processes, such as stable Cr isotope inventory of reservoirs and high temperature Cr isotope fractionation mechanism, provides basis for other studies. Especially with the development of mass spectrometry, interests in the behavior and mechanism of high temperature Cr isotope fractionation have increased in recent years. In this paper, we review the latest research progress on Cr isotope compositions of different reservoirs and Cr isotopes in high temperature magmatic processes. |
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| Keywords: | Cr isotopes isotope fractionation high-temperature magma mantle crust |
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