81Kr: A NEW METHOD OF PALEOGROUNDWATER DATING
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摘要:
由于81Kr化学性质稳定、半衰期长且在地下水运移过程中没有额外来源的优点，近年来，成为测定古老地下水年龄（105~106 a）的有效手段.国外对于81Kr的测定方法、地下水定年应用研究已较为深入，而国内应用81Kr作为水文地质学的研究尚处于起步阶段.本文通过对国内外81Kr应用于地下水测年的原理以及81Kr的测定方法进行总结，针对目前研究的问题进行探讨，并对今后放射性氪核素在水文地球化学中的研究进行展望，为国内对于81Kr的测定与在古地下水定年研究方面提供科学依据.
Abstract:Due to its advantages such as stable chemical property, long half-life and no extra sources during groundwater migration, 81Kr has recently become an effective method to determine the age of paleogroundwater (105-106 a). The overseas researches on determination of 81Kr and groundwater dating are relatively mature, yet related domestic studies are still at the beginning stage. This paper summarizes the principles of 81Kr in groundwater dating and extraction method, discusses the problems in current research, and makes prospects for the studies of radioactive Kr nuclide in hydrogeochemistry, which provides scientific basis for the researches at home.
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Key words:
- 81Kr /
- groundwater dating /
- radionuclide /
- hydrogeology
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