中文摘要：

讨论了铼-锇同位素稀释法测定黑色页岩年龄的溶样方式，比较了王水和不同温度下CrO3-H2SO4的Carius管溶样技术，通过改进流程将铼空白控制在10Pg之内，并结合高灵敏度的电感耦合等离子体质谱分析手段，初步研究建立了一种用CrO3-H2SO4溶剂准确测定黑色页岩年龄的方法。

英文摘要：

Different sample digestion systems for Re-Os dating of black shale were studied. The sample digestion effect of aqua regia-Carius tube digestion system and CrO3-HzSO4-Carius tube digestion system at different digestion temperature were compared. The results from the study show that the CrO3-HzSO4-Carius tube digestion system provides the lower total procedure blank value for rhenium （less than 10 pg） than aqua regia system. Combined with high sensitive inductively coupled plasma-mass spectrometric （ICP-MS） analytical technique, a new CrO3-HzSO4- Carius tube digestion-ICPMS determination system for Re-Os dating of black shale has been established.