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宇宙成因核素21Ne测年方法在地表暴露测年方面具有测年范围宽、定年材料选择范围广、测试所需样品量少、前处理过程简单等优点,是第四纪年代学领域中一种重要的测年方法然而,由于受到稀有气体质谱仪分辨能力的制约,21Ne测年方法在国内的应用尚处于起步阶段.本文在对质谱仪纯化系统加装超低温冷泵的基础上,初步建立了宇宙成因核素21Ne测年方法的测试流程,并分别测试了标准样CREU-1的Ne同位素含量和龙首山阶地的21Ne年龄检验了该测试流程在石英样品暴露定年方面的可行性.该测试流程的建立,将为宇宙成因核素21Ne测年方法在第四纪地质、活动构造等研究领域的应用提供重要技术支撑.
The cosmic nuclide 21Ne dating method has the advantages of wide dating range, long time-consuming material selection, low testing sample size and simple pre-treatment process in surface dating dating. It is a type of quaternary geochronology However, the application of 21Ne dating method in China is still in its infancy due to the restriction of resolving ability of Rare-gas mass spectrometer.Based on the installation of ultra-low temperature cold pump in mass spectrometer purification system, The cosmic nuclide 21Ne dating method was tested and the Ne isotope content of CREU-1 was tested separately and the 21Ne age of Longshou mountain terrace was tested.The feasibility of this test procedure in the quartz dating exposure The establishment of the process will provide important technical support for the application of the 21Ne dating method of cosmic genetic nuclides in the research fields of quaternary geology and tectonics.