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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~(40)Ar/~(39)Ar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。
Due to differences in sedimentary environment and sediment type and genesis, the lithology and composition of Quaternary sediments may change with time, and the structure and thickness may also change spatially, making it difficult to measure their exact age over a long period of time. In this paper, the dating of various methods such as K / Ar method and ~ (40) Ar / ~ (39) Ar method, glass meteorite method, uranium dating, amino acid racemometry, cosmic nuclide dating and electron spin resonance The scope and the object of measurement are introduced. The main problems existing in the new progress of Quaternary dating method and the ways of improvement are analyzed. Increasing the reliability and accuracy of the results of the seized times requires not only a wealth of experience in geological work but also the selection of the most appropriate method of dating and the use of multiple dating methods wherever possible. With the development of quaternary environment and global climate change, more and more attention has been paid to geologists. It is believed that Quaternary sediment dating method has more broad prospects for development in global climate change and environmental evolution.