| 第四纪沉积物测年新进展 |
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| 作者姓名： | 袁璐璐 汪明启 胡佳乐 |
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| 作者单位： | 1. 中国地质大学北京地球科学与资源学院， 北京 100083;2. 中国地质大学北京能源学院， 北京 100083 |
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| 基金项目： | 国家高科技研究发展计划(863)(编码:2006AA06Z102)项目资助。 |
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| 摘 要： | 由于沉积环境和沉积物类型与成因的差异，第四纪沉积物岩性、组成会随时间变化，并且结构和厚度在空间上也可能发生明显变化，使得长期以来难以测得其准确年代。论文对K/Ar法和40Ar/39Ar法、玻璃陨石法、铀系定年、氨基酸外消旋法、宇宙成因核素法、电子自旋共振定年等各种方法的定年范围和测定对象进行了介绍，分析了第四纪测年方法新进展存在的主要问题和改进途径。要提高所测年代结果的可靠性和准确度，不仅需要丰富的地质工作经验，还需要选择最恰当的定年方法，并且尽可能用多种定年方法进行交叉对比。随着第四纪环境演变及全球气候变化等方面的研究日益受到地质学者的关注，相信第四纪沉积物定年方法在全球气候变化、环境演化等研究领域具有更加广阔的发展前景。
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| 关 键 词： | 第四纪 沉积物定年 同位素定年 新进展 |
| 收稿时间： | 2014-09-01 |
New Progress in Dating of Quaternary Sediments |
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| Authors: | YUAN Lu-lu WANG Ming-qi HU Jia-le |
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| Institution: | 1. School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China;2. School of Energy Resources, China University of Geosciences, Beijing 100083, China |
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| Abstract: | The Quaternary was an important period in the geological evolution history because it is closely related to the human beings. Therefore, highly reliable and precise Quaternary dating is required. Quaternary sediments change overtime in lithology and composition, and may have obvious changes of space in structure and thickness because of different sedimentary conditions and sediment types and geneses, which make it more difficult to determine the accurate ages of Quaternary sediments. This paper presents the new progress in Quaternary dating, such as K/Ar and 40Ar/39Ar dating, tektite dating, uranium dating, Amino acid racemization dating, cosmogenic nuclide dating, and electron spin resonance dating, as well as the dating range and objects of the related methods. Furthermore, the present problems and strategies for improvement of Quaternary sediment dating methods are introduced. However, to improve the reliability and accuracy of dating, not only geological experience, but also correct dating methods are required for comparative dating. With more attention paid to recreation of the Quaternary environment and its relationship with global climate changes, the dating methods for Quaternary sediments should be helpful in investigations of global climatic changes and environment evolution in the future. |
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| Keywords: | quaternary sediment dating isotopic dating new progress |
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