Development of Re-Os isotopic dating analytical technique and determination know-how on ICP-MS precise dating for molybdenite
Re-Os同位素定年方法进展及ICP-MS精确定年测试关键技术

Principles and technical development history, as well as its application of Re-Os dating are presented in this paper. The review focuses on the methods for sample decomposing and Re-Os chemical concentrating and enrichment, especially on determination know-how for ICP-MS Re-Os precise dating, such as mass fractionation and mass interference correcting, concentration predetermining approximately, deciding of sample weight, Re/Os ratio of spike and volume of spike solution and so on. The decoupling of Re and 187Os on subgrain-scale in molybdenite and strategies for reducing its influence are described. Formula for transmission of error, or the relationship between the change rate for error of concentration and that for error of isotope ratios determined, is exhibited in this paper. It is pointed out that we should pay attention to different directions in study of Re-Os dating method.