RESEARCH STATUS OF Fe ISOTOPES AND ITS APPLICATION TO FERRODOLOMITE STUDY IN XISHA ISLANDS
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摘要:
铁是地球中含量最多分布最广的过渡金属元素之一，但针对Fe同位素的研究滞后。介绍了开始于TIMS，到MC-ICP-MS的Fe同位素测试技术，其重要研究进展与现状。指出Fe元素及Fe同位素在自然界中的组成、分布及在生物、非生物有机作用过程中分馏的特征；Fe同位素地球化学及在古海洋学、矿床学等地球科学领域的广泛应用，涉及铁硫化物、铁氧化物和铁碳酸盐矿物-菱铁矿成矿作用。后者目前被认为是碳酸盐岩铁白云岩成因研究的关键，通过铁白云岩中大量铁和重金属来源示踪研究，揭示西沙群岛孤立岛屿环境铁白云岩的成因特征和机制，属于白云岩问题研究重要内容，具有重要的意义。
Abstract:Iron is one of the most widely distributed transitional metal elements on the earth, but the research on Fe isotopes lags behind. This article describes the Fe-Isotope testing techniques starting from TIMS to MC-ICP-MS, and its major research progress and status quo. The composition and distribution of Fe elements and Fe isotopes in the nature and their fractionation in both the biological and non-biological processes are also described. Fe isotope geochemistry and their wide application in the fields of paleoceanography, mineral deposits and other branches of earth sciences involve iron sulfides, iron oxides, and iron carbonate minerals -siderite mineralization. The latter is currently considered to be the key to the study of the origin of carbonate dolomite. Through the trace studies of trace amounts of iron and heavy metals in dolomite, we discussed the genetic characteristics and mechanism of the environmental dolomite in the isolated island of the Xisha Islands and its relation to the dolomite problem.
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Key words:
- Fe isotope /
- MC-ICP-MS /
- fractionation mechanism /
- X-ray powder diffraction /
- Xisha Islands /
- ferrodolomites
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