Fe同位素研究现状及其在西沙群岛铁白云岩研究中的应用  

RESEARCH STATUS OF Fe ISOTOPES AND ITS APPLICATION TO FERRODOLOMITE STUDY IN XISHA ISLANDS

作　　者：史同强 许红 张海洋[2,3,4,6] 李旭平 张威威[2,3,4,6] SHI Tongqiang;XU Hong;ZHANG Haiyang;LI Xuping;ZHANG Weiwei(College of Earth Science and Engineering,Shandong University of Science and Technology,Qingdao 266590,China;Key Laboratory of Marine Sedimentology and Environmental Geology,SOA,First Institute of Oceanography,Qingdao 266061,China;Qingdao Institute of Marine Geology,CGS,Qingdao 266071,China;Laboratory for Marine Mineral Resources,Qingdao National Laboratory for Marine Science and Technology,Qingdao 266071,China;Shandong Provincial Key Laboratory of Depositional Mineralization ＆ Sedimentary Minerals,Shandong University of Science and Technology,Qingdao 266590,China;School of Geosciences,China University of Petroleum（East China）,Qingdao 266580,China)

机构地区：[1]山东科技大学地球科学与工程学院,青岛266590 [2]海洋沉积与环境地质国家海洋局重点实验室国家海洋局第一海洋研究所,青岛266061 [3]中国地质调查局青岛海洋地质研究所,青岛266071 [4]海洋国家实验室海洋矿产资源评价与探测技术功能实验室,青岛266071 [5]山东省沉积成矿作用与沉积矿产重点实验室,青岛266590 [6]中国石油大学(华东)地球科学与技术学院,青岛266580

出　　处：《海洋地质前沿》2018年第6期50-55,共6页Marine Geology Frontiers

基　　金：国家专项(GZH201200510;2017FY2014-07);国家重点基础研究发展计划(973计划)(2012CB956004)

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。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 dis- tribution 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.

关 键 词：FE同位素 MC-ICP-MS 分馏机制 X光粉晶衍射 西沙群岛 铁白云岩 

分 类 号：P597[天文地球—地球化学]