中文摘要：

利用岩石热脱气单体碳／氢同位素组成分析装置，通过高温热解、分步加热的方法，对山东蓬莱第四纪碱性玄武岩全岩流体组分中氢同位素进行了同位素质谱分析，得到了流体组分中热解H2及CH4的δD值。在15个样品中，热解H2及CH4的δD值变化相对较小，说明热解H2和烃的来源比较单一。

英文摘要：

A method for on-line analysis of hydrogen isotopes of basalt with stepped heating degas is reported in this paper. The method has been applied in the hydrogen isotope analysis in mantle fluid components of Quaternary basalts from Penglai, Shandong province with the quantitative δD values of H2 and CH4. The fact that there is only slight difference in δD values of H2 and CH4 in the results indicates that the H2 and hydrocarbons come from a homogeneous source.