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中文摘要：
老于20万年的碎屑沉积物的绝对测年方法急待建立。本文利用我国典型的碎屑沉积物——洛川黄土石英中的Al心，在115K温度下进行ESR测年研究，初步给出了4层黄土剖面的古剂量值。结果表明，古剂量值随着地层深度的增加而呈增长趋势，说明利用ESR方法测定低温Al心可获得老于20万年的碎屑沉积物的地质年龄。
英文摘要：
It is urgent to study and establish a method for evaluating the ages of sediments older than 200 000 years. ESR dating has great potential in this field. This paper gives the palm-doses for the four layers of loess in Luochuan, Shaanxi Province. The preliminary results were obtained by measuring Al centers in quartz under 115 K with the ESR method. The paleo-dose increases with the depth of loess without saturation, and this indicates that ESR dating with Al centers might be used to evaluate the ages of sediments older than 200 000 years.
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