光释光测年中石英样品提纯方法的改进

doi:10.11867/j.issn.1001-8166.2008.03.0284

地球科学进展 ›› 2008, Vol. 23 ›› Issue (3): 284 -289. doi: 10.11867/j.issn.1001-8166.2008.03.0284

光释光测年中石英样品提纯方法的改进

李国强 ¹，赵晖 ^1，2，范育新 ¹，彭海梅 ^1，2，陈发虎 ¹

1.兰州大学西部环境教育部重点实验室,甘肃兰州 730000;2.中国科学院寒区旱区环境与工程研究所沙漠与沙漠化重点实验室，甘肃兰州 730000

收稿日期:2007-10-19 修回日期:2008-01-30 出版日期:2008-03-10
通讯作者: 赵晖（1973-），男，山西忻州人，副研究员，主要从事释光年代学和环境演化研究. E-mail:hzhao@lzb.ac.cn
基金资助:
国家自然科学基金面上项目“阿拉善高原—黄土高原全新世重大干旱事件（侧重释光年代）研究”（编号：40401061）和“晚第四纪古兰泰湖面波动与环境变化研究”（编号：40502016）；国家自然科学基金创新群体项目（编号：40721061）资助.

Improved Method for Quartz Purification in OSL Dating

Li Guoqiang ¹，Zhao Hui ^{1, 2}，Fan Yuxin ¹，Peng Haimei ^1,2，Chen Fahu ¹

1.Key Laboratory of Western China＇s Environmental Systems （Ministry of Education） College of Earth and Environment Sciences, Lanzhou University, Lanzhou 730000,China;2. Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000,China

Received:2007-10-19 Revised:2008-01-30 Online:2008-03-10 Published:2008-03-10

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为了解决光释光前处理中遇到的传统方法无法获得满足纯度石英的问题，通过大量对比实验，结合玻璃工艺中石英分离研究成果，最后获得了新的石英提纯流程，与传统方法相比，新方法通过化学分离避免了密度变化对石英长石分离的影响，从而解决了斜长石和岩屑在传统的重液分离中无法剔除的问题，新方法能够获得满足纯度要求和量要求的石英，同时，新方法比传统方法实验室工作效率更高。

关键词: 光释光测年, 石英提纯, 十二胺浮选

In order to resolve the problem met in the pre-treatment of traditional methods for Optical stimulated luminescence (OSL) dating sample which can not obtain enough purity and quantity of quartz, a new quartz separation process in obtained, with contrast experiments, combined with the well-developed quartz purification techniques in glass production, finally a new quartz separation process is obtained. Compared with the traditional methods, the new method adopted by chemical separation to avoid the impact of density of feldspar thus resolves the problem of plagioclase feldspar and debris that can not be removed totally during the traditional methods. The new method can obtain more sufficient purity quartz and at the same time is more efficient in laboratory work.

Key words: OSL dating, Mineral separation of quartz, Laurylamine floating selection.

中图分类号:

P597
TD873.3

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