宇宙成因核素21Ne测年方法实验流程的建立及其可靠性验证

宇宙成因核素测年方法是目前国际上年代学领域的一个研究热点，在研究地表暴露历史方面具有独特的优势，可以用于定量计算地表侵蚀、河流下切等反映气候及构造运动影响的地表过程速率，对研究地球各圈层之间的相互作用关系具有重要意义。目前，国内对于稳定稀有气体宇宙成因核素21Ne测年方法的研究还处于探索阶段。本申请拟在国内现有21Ne测年研究的基础上，以河西走廊地区河流阶地为研究对象，开展宇宙成因核素21Ne测年方法研究，在本实验室建立起可靠的21Ne测年方法的测试流程。该项目将为国内第四纪地质学、活动构造及地震危险性研究提供有力的年代学支持。

Terrestrial in situ cosmogenic nuclides (TCN) are an extremely powerful tool for understanding both the exposure history of the surface and rates of geological and geomorphic processes. The TCN methods have rapidly supplanted older techniques for dating geomorphic surfaces, and have been used to date landforms that constitute records of palaeoclimate fluctuations such as glacial moraines, river terraces, flood deposits, and many more. In China, the noble gas TCN dating technique, using 21Ne, is still in its beginning stages. This project attempts to set up the cosmogenic 21Ne dating method in our laboratory based on the domestic research experience, by using the samples from alluvial terraces in the Hexi Corridor basins as an example, and to improve this technological process. This project will provide a significant geochronological tool for the researches of geological and geomorphological fields.