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山地冰川活动的年代测定是青藏高原及其周边山地古环境重建的关键问题之一。由于测年数据有限,该地区第四纪冰川的发育时间仍有较大争议。作为能用于冰川沉积物直接定年的有效方法,光释光技术是解决该争议的手段之一。本文综述了此前青藏高原及其周边山地冰川沉积光释光测年的工作。光释光技术可以应用于该区冰川沉积测年。当然,野外采样时必须注意采样点的选择。冰湖、冰河沉积以及冰面融出碛等在搬运和沉积过程中更易于曝光,释光信号容易归零,因此是比较理想的测年选择。虽然问题仍然很多,但仍有不少光释光测年成功应用于第四纪冰川的报道。为了准确确定该区第四纪冰川活动的时间及其驱动机制,未来需要更多更精确的测年数据,包括光释光与宇宙射线等其他方法的对比应用。
Chronological determination of glacier activity in mountainous areas is one of the key issues in the reconstruction of paleoenvironment of the Qinghai-Tibet Plateau and its surrounding mountains. Quaternary glaciers in the area are still under controversy due to limited dating. As an effective method that can be used for the direct dating of glacial sediments, optical luminescence technology is one of the means to solve this controversy. This paper reviews the work of the optical dating of glacial sediments in the Qinghai-Tibet Plateau and its surrounding areas. Optical luminescence technology can be applied to the glacial deposition dating in this area. Of course, the field sampling must pay attention to the choice of sampling points. Glacial lakes, glacial deposits, and ice-melting moraines are more easily exposed during transport and sedimentation, and luminescence signals are easily zeroed, making them an ideal dating option. Although the problem is still a lot of, there are still many reports on the successful application of photoluminescence dating to Quaternary glaciers. In order to accurately determine the time and driving mechanism of Quaternary glacier activities in the area, more and more accurate dating data are needed in the future, including comparison and application of other methods such as light-emitting light and cosmic rays.