钼的稳定同位素体系及其地质应用
The systematics of molybdenum stable isotope and its application to earth science
查看参考文献41篇
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文摘
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近年来多接收杯电感耦合等离子体质谱仪(MC-ICP-MS)的广泛应用,大大提高了Mo同位素分析方法的精度和效率,使Mo同位素地球化学成为当前地学研究领域中的一个前沿方向。本文综述了Mo稳定同位素的最新研究进展及其地质应用。自然界中的Mo同位素(δ~(98/95)Mo)的一般变化范围是-1.35‰～2.60‰。Mo同位素分馏在充氧环境下取决于Mn氧化物的吸附或共沉淀,贫氧-缺氧环境下受控于水溶液中的[H_2S]。沉积物中的Mo同位素既能指示古沉积环境的氧化还原条件,也能够指示与之相关的古海洋地理环境,因此,Mo同位素是了解局域至区域沉积环境的氧化还原条件、硫和碳地球化学循环及古海洋化学演化等的强有力工具。随着其分馏机理的进一步阐明和应用范围的拓展,Mo同位素将在地球与环境科学研究中得到广泛的应用。 |
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其他语种文摘
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In recent years,multiple-collector inductively coupled plasma mass spectrometry(MC-ICP-MS)has been increasingly used for precise and accurate measurement of transitional metal isotopes,which has greatly improved precision,accuracy,and efficiency of molybdenum isotope analysis of geological samples,and also made Mo isotopic geochemistry a new frontier in Earth science.This paper presents a review of the recent progress in the systematics of Mo stable isotope and its application in geology.The natural range of~( 98/95)Mo is from-1.35‰to 2.6‰.The fractionation of Mo isotopes in an oxidizing environment is mainly attributed to the adsorption of dissolved Mo on Mn-oxides,whereas that in an suboxic-euxinic environment is controlled by the content of H_2S dissolved in water.Mo isotopic signatures in sediments can be used as an indicator for redox conditions of paleo-environment and corresponding paleo-oceanography.Therefore,molybdenum isotopes can be used as a powerful tool for understanding the redox conditions of local or regional depositional environment,the biogeochemical cycle of sulfur or carbon,and the geochemical evolution of ancient oceans.It is believed that,with further studies of the molybdenum isotope fractionation mechanism,molybdenum isotopes will certainly be applied to more and more areas in earth and environment sciences. |
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来源
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岩石矿物学杂志
,2008,27(4):353-360 【核心库】
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关键词
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Mo同位素
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分馏机理
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分析方法
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地质应用
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多接收杯电感耦合等离子体质谱仪
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地址
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1.
中国科学院地球化学研究所, 环境地球化学国家重点实验室;;国土资源部同位素地质重点实验室, 贵州, 贵阳, 550002
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中国地质科学院地质研究所, 国土资源部同位素地质重点实验室, 北京, 100037
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伊利诺伊大学厄巴纳-香槟分校地质系, 厄巴纳
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语种
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中文 |
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ISSN
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1000-6524 |
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学科
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地质学 |
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基金
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国家教育部留学回国人员科研启动基金
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国家863计划
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国家自然科学基金
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文献收藏号
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CSCD:3340003
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