近年来，含铀矿物微区原位U-Pb同位素测年方法已广泛应用于同位素地质年代学研究中，成为追溯地球演化历史、分析各类地质作用和揭示成岩成矿过程的重要技术手段。在进行LA-ICPMS U-Pb同位素测年的过程中发现，基体效应对测年结果准确性的影响不容忽视。本项目拟对斜锆石、金红石、锡石和铌铁矿等氧化物型含铀矿物在微区原位LA-ICPMS U-Pb同位素定年时基体效应的影响、差异和校正策略进行深入系统的研究，进而发现规律，消除基体效应的影响，力争把定年误差控制在5%以内。通过解决寻找和制备某些标样的问题，得到准确的U-Pb同位素年龄，为全面认识相关地质时代及矿床的生成演化历史提供技术支持。

In recent years, U-Pb isotopic dating methods of U-bearing minerals have been widely applied in the isotopic geochronology, as an important technology in decoding the history of earth evolution, various geological processes, diagenesis and mineralization. During LA-ICPMS U-Pb isotopic dating, we found that the influence of matrix effects on the accuracy of the dating results could not be ignored. This program aims at exploring the influences, variation and correction strategies of matrix effects in baddeleyite, rutile, cassiterite, columbite and other oxide-type U-bearing minerals by in-situ LA-ICPMS U-Pb isotopic dating. Then, underlying mechanism will be found, the influences of matrix effects will be eliminated, and the dating deviation will be reduced within 5%. Based on discovery or preparation of the standards, accurate U-Pb isotopic age will be obtained, which provide technical support to the study of relevant geological events and evolution history of deposits.