129I是一种新型高敏环境示踪剂，同时又是一种潜在的放射性污染源，因此有必要对其在各类复杂地质环境下的环境行为进行研究。铀矿床中129I与铀相伴相生，是一个理想的研究对象。然而，国内外对铀矿区不同地质背景条件下129I的迁移行为研究不足。本项目拟在若尔盖铀矿区主要开展地下水的采集，同时辅以若干岩石和地表水样品，分析样品中129I、U等核素的分布，计算129I的裂变产额，查明129I的主要来源，研究若尔盖铀矿区129I的迁移规律及其与铀含量的相关性。此外，由于该铀矿床产于板岩夹层中，此项研究结果反映了129I在板岩类地质体系中的地球化学行为。本项目的开展将在水文地质、铀矿地质、同位素环境地球化学的交叉融合方面取得进展，并为129I在铀矿区的应用前景提供参考。

Investigation on the environmental behavior of 129I in varieties of environmental background is necessary, since 129I is regarded as a new sensitive environmental tracer, as well as one of a radioisotopes with potential radioactive hazard. Level of 129I is highly related with uranium concentration in uranium-ore deposit, therefore makes it an ideal area to investigate 129I properties in the environment. However, reports on biogeochemical characterizes of 129I under complex geological settings in uranium ore were insufficient. Aiding by analysis in rock, groundwater and river water samples collected in Zoige uranium ore field, this project is aiming to map the 129I and uranium distribution and identify sources of 129I. Besides, migration pattern of 129I can be revealed according to fission yield calculation in host rocks. In addition, because the uranium ore occurs in slate strata, this study can therefore reflect the geochemical behavior of 129I in slate-bearing system. The program will lead to interdisciplinary breakthroughs in hydrogeology, uranium-ore geology and isotope geochemistry. Moreover, this project will provide a basis for the coming investigations on 129I applications in uranium-ore deposit .