铀系法年代学研究进展及在高原盐湖中的应用

doi:10.3981/j.issn.1000-7857.2017.06.009

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摘要高原盐湖在形成的各个阶段，都详尽记录和保存着其咸化阶段的环境变化信息，是研究极端干旱气候的重要载体。年代学是盐湖古气候研究最重要的一项内容，也是后续研究工作的基础。目前除了最常用的¹⁴C定年、光释光（OSL）定年、电子磁悬共振（ESR）和古地磁定年等方法外，铀系法定年在盐湖沉积的年代学研究中也得到了广泛的应用。随着技术发展，铀系测年技术方法经历了α谱法、热电离质谱法（TIMS）再到多接受器电感耦合等离子体质谱技术（MC-ICP-MS）的不同发展阶段。而这些技术方法在不同时期和阶段对第四纪及高原盐湖的定年研究做出了一定的贡献。盐湖沉积中的碳酸盐黏土、石盐和石膏等盐类矿物都可以作为铀系定年的研究材料。随着质谱技术的发展，盐类矿物的微区定年也逐渐成为可能。同时，盐湖沉积中盐类矿物的铀系定年研究仍然有限，未来多开展这些方面的研究将对铀系测年技术在盐湖沉积中的应用产生积极作用。

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	马妮娜
	郑绵平

关键词 ：青藏高原, 盐湖沉积, 铀系法年代学, 盐类矿物

Abstract：The saline lake deposits involve information of environmental changes during various stages of its evolution and are an important research carrier for extreme arid climates. The geochronological study is very important for reconstructing the past climate changes, as recorded in the salt lake.At present, besides the dating based on the ¹⁴C, the OSL, the ESR and the paleomagnetism, the uranium-series dating is used widely in the chronology research of the salt lake deposit. With the advancement of the dating technology,the uranium-series dating has experienced several stages:The α spectrometry,the TIMS and the MC-ICP-MS, which have made some contributions to the geochronological study of the Quaternary and the salt lakes on the plateau. And various kinds of saline minerals, such as the carbonate, the halite and the gypsum, can be used as the uranium-series dating materials. With the progress of the mass spectrometry technology, the micro dating in saline minerals becomes possible. But the uranium-series dating on saline minerals remains a research issue. So in the future, the dating researches on saline minerals will be helpful for the applications of the uranium-series dating technology for the saline lake.

Key words： Qinghai-Tibetan Plateau saline lake uranium-series dating saline minerals

收稿日期: 2016-11-22

基金资助:国家自然科学基金青年科学基金项目（41302142）

作者简介: 马妮娜,助理研究员,研究方向为盐湖地质学和同位素年代学,电子信箱:56258751@qq.com

引用本文:

马妮娜, 郑绵平. 铀系法年代学研究进展及在高原盐湖中的应用[J]. 科技导报, 2017, 35(6): 77-82.
MA Nina, ZHENG Mianping. Research progress in uranium-series dating method and application for saline lake of Tibet Plateau. Science & Technology Review, 2017, 35(6): 77-82.

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http://www.kjdb.org/CN/10.3981/j.issn.1000-7857.2017.06.009 或 http://www.kjdb.org/CN/Y2017/V35/I6/77

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