Abstract: This paper describes systematically the development history and present situation,the significance of the U-series disequilibriu method investigation of young volcanic rocks,then summarizes the application of the method in geochronology,mantle tracer and magmatic evolution. All of these investigations and experience are extremely conducive and revelatory to carrying out the key project "Monitoration and study on some modern active volcanoes in China". Furthermore,high precise TIMS dating method is also introduced in this paper.

Key words: Extrusive rock, Isotopic age dating, Magma activity

摘要： 系统地引述了不平衡铀系研究的发展历史及现状,阐述了这一方法在年轻火山岩研究中的应用及意义,讨论了它在年代学、地幔示踪、岩浆演化等方面的应用。这些研究成果及经验,对完成我局“九五”重点项目“中国若干近代活动火山监测与研究”具有重要的参考价值和启示意义。此外,还简介了高丰度灵敏度热电离TIMS法的发展、应用和前景。

关键词: 喷出岩, 同位素年龄测定, 岩浆活动