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科学通报  2014 

宇宙成因21Ne暴露测年方法的初步建立及检验

DOI: 10.1360/N972014-00353, PP. 2707-2713

Keywords: 宇宙成因核素,21Ne,暴露年龄,石英标准样CREU-1,10Be

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Abstract:

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.

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