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介绍了几组沉积物中石英ESR功率饱和效应的基础实验情况,认为在用石英进行ESR测年时,微波功率的选择是一个重要参数,它直接影响累积剂量(AD)的求取,从而严重影响测年结果。在某些特定的地质环境下(如黄土,海洋沉积物),采用比较高的微波功率,可从沉积物石英的E＇心得到较老沉积物(大于50万年)可信的ESR年代。
The basic experimental results of quartz ESR power saturation in several sediments are introduced. It is considered that the selection of microwave power is an important parameter in ESR dating with quartz, which directly affects the calculation of cumulative dose (AD) Affect the dating results. Under certain geological conditions (such as loess and marine sediments), the credible ESR ages of older sediments (more than 500,000 years) can be obtained from the E ’center of sedimentary quartz using relatively high microwave power.