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若干金属稳定同位素体系的研究进展:以中国科大实验室为例

Recent Advances of Metal Stable Isotope Geochernistry Studies
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摘要 多接收电感耦合等离子体质谱(MC-ICP-MS)的应用,引发了金属稳定同位素分析技术的重大突破,使得高精度测定众多金属元素的稳定同位素组成成为可能,金属稳定同位素地球化学因此成为最近二十年来国际上最激动人心、发展最迅速的地球科学新兴领域。本文以中国科技大学金属稳定同位素实验室近年来在Mg、Si、Ca、V、Zn、Cu、Ba等体系的研究进展为例,说明该领域的工作方法、重要问题和发展趋势。金属稳定同位素地球化学的主要功能是示踪物质迁移和地质过程。首先,要根据MC-ICP-MS的特点,建立高精度的分析方法。其次,要研究同位素示踪的基本原理,包括测定地球主要储库的同位素组成,掌握同位素分馏机理。最后,在前两项工作的基础上,针对重要的地质问题开展应用。可以预见,金属稳定同位素地球化学有良好的发展前景,在地球科学乃至其他学科都有广泛的交叉和应用。 The application of multicollector-inductively coupled plasma mass-spectrometer (MC-ICP-MS)has resulted in big breakthroughs in analytical methods for metal stable isotopes (MSI).Many MSI can now be accurately measured.In the last 20years,MSI geochemistry has become the most exciting and rapidly developing field in Earth sciences.Taking the progresses in studies on Mg,Si,Ca,V,Zn,Cu,and Ba isotopes in the MSI geochemistry laboratory in the University of Science and Technology of China as an example,this article reviews the methodology,important questions,and develo- ping trends in the MSI geochemistry.The main application of the MSI geochemistry is to trace transport of materials and ge- ological processes.For these purposes,we firstly need to take advantage of the MC-ICP-MS to develop high-precision analytical methods.Secondly,we need to study the principles of using the MSI as geochemical tracers,including determining the isotope compositions of the main reservoirs and understanding mechanisms of isotope fractionation.And thirdly,we can apply the MSI geochemistry to important geological problems based on advances in the methods and principles.We can see the promising future of the MSI geochemistry given the wide applications into geosciences and multi-disciplinary studies.
作者 黄方 田笙谕 HUANG Fang;TIAN Sheng-yu(CAS Key Laboratory of Crust-Mantle Materials and Environments,School of Earth and Space Sciences,University of Science and Technology of China,Hefei 230026,China)
出处 《矿物岩石地球化学通报》 CSCD 北大核心 2018年第5期793-811,共19页 Bulletin of Mineralogy Petrology and Geochemistry
基金 国家自然科学基金重点项目(41630206).
关键词 金属稳定同位素 多接收电感耦合等离子体质谱 分析方法 同位素示踪 地球化学储库 metal stable isotopes MC-ICP-MS analytical methods isotope tracing geochemical reservoirs
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