作　　者： ; ; ; ; ; ; ;

机构地区： 中国科学技术大学地球和空间科学学院化学地球动力学研究实验室

出　　处： 《核技术》 2002年第12期1013-1018,共6页

摘　　要： 用Re -Os法和Os-Os法测定了长江中下游地区的辉钼矿样品。这两个样品给出一致的Re -Os法和Os -Os法年龄。Os -Os法测定过程中分步蒸馏实验结果表明没有同位素分馏 ,证明Os -Os法可以避免Re -Os法定年中遇到的问题 ,简化实验过程 ,给出可靠的年龄结果 。 Two molybdenite samples from the Middle-Low Reaches of the Yangtze River were dated by both Os-Os and Re-Os methods. Os-Os and Re-Os dating give identical age results for the two samples. An experiment of step distillation of Os-Os method suggests that no isotopic fractionation is observed between fractions obtained by the experiment. The results prove that the Os-Os method can avoid the problems in the Re-Os method, simplify the experimental procedure, give creditable age data, and have unique advantage that no quantitative extracting of Os is required.

关 键 词： 法定年 法定年 辉钼矿 地质年代学 放射性同位素

领　　域： [天文地球] [天文地球]