精确测定火山岩中Nd、Sr的质谱分析法

A Mass Spectral Method for Accurate Measurment of Nd and Sr from Volcanic Rocks

为研究近代火山岩的来源与演化,本文详细介绍了所采用的分离技术和质谱分析方法。Nd、Sr的同位素分馏分别校正到^(148) N_dO/^(144) N_dO=0.24 24 36,^(86)Sr/^(88)Sr=0.1194。在火山岩Nd-Sr体系研究中,取得了可靠数据,并由此获得了有意义的地质结论。

In order to study the origin and the evolution of recent volcanic rocks,aseparate technique and a mass spectral method are described in detail. In ourwork Nd and Sr are corrected for isotopic fractionation to ^(148)NdO/^(144)NdO=0.242436, ^(86)Sr/^(88)Sr=0.1194, respectively. The reliable data have been ob-tained, thus leading to geologically significant conclusions in the study ofNd-Sr system from volcanic rocks.