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程海沉积物柱芯中存在三个峰形完好的137Cs蓄积峰。 94%的137Cs累计值分配于 1985年以前 ,表明程海沉积物中的13 7Cs能较好地保存在沉积年代的相应层节中。该沉积物柱芯中2 10 Pbex的分布特殊 ,据此将近五十年来程海的沉积过程分为三个稳定沉积阶段和两个快速沉积阶段。两种计年方法的结合有助于认识沉积速率变化较大情况下湖泊的沉积状况 ,也有助于加深对核素计年方法的理解
There are three peaks of 137Cs in Chenghai sediment core. The cumulative value of 137% for 94% was distributed before 1985, indicating that 13 7Cs in the sediment of Chenghai Sea can be well preserved in the corresponding stratum of sediment age. The distribution of 2 10 Pbex in this sediment core is special. Based on this, the sedimentary process of Chenghai Sea has been divided into three stable sedimentary stages and two rapid sedimentary stages in nearly 50 years. The combination of the two dating methods can help to understand the sedimentation of lakes in the case of large changes in sedimentation rate and also help to deepen the understanding of the method of nuclear dating