期刊论文

The matrix effects in oxide-type U-bearing mineral LA-ICP-MS UPb isotopic dating and their correction methods

中文

地质通报

Geological Bulletin of China

1671-2552

2015

34

12

2325-2333

10.3969/j.issn.1671-2552.2015.12.018

国家自然科学基金项目(批准号:41503052、41373053)； 北京离子探针中心开放课题基金项目(编号:DDK14-39)； 东华理工大学核资源与环境重点实验室开放基金项目(编号:NRE1401)； 国土资源部公益性行业科研专项项目(编号:201011027-4)；

本校为第一机构

基体效应是矿物微区原位LA-ICP-MS U-Pb测年中备受关注的问题,因为其对测年结果准确性的影响不容忽视。通过介绍斜锆石、金红石、锡石、铌铁矿、晶质铀矿、沥青铀矿等氧化物型含铀矿物微区原位LA-ICP-MS U-Pb同位素测年过程中基体效应的影响和校正方法,简要评述其校正方法的优点、局限性,探索规律和相似性,解决寻找和研制稀有矿物标样的难题。对含铀矿物进行准确的微区原位LA-ICP-MS U-Pb同位素年龄测定,对于全面认识众多地质事件和矿床的生成演化历史,进而更准确地构建其年代构造格架、建立更合理的成岩成矿模式具有重要的科学意义。

The matrix effect is a problem of much concern in U-Pb isotopic dating by in situ LA-ICP-MS,and its influence on the accuracy of the dating results should not be ignored. The authors intend to study the influences and correction methods of matrix effects on U-Pb isotopic dating by in-situ LA-ICP-MS for such minerals as baddeleyite, rutile, cassiterite, columbite, uraninite, pitchblende and other oxide-type U-bearing minerals. This paper briefly describes the advantages and limitations of these correction methods in the hope of finding some regu...