南京直立人地层的 ESR 测年研究

The ESR dating of the Nanjing Homo erectus stratigraphy

用ＥＳＲ方法测得５个采自南京直立人地层化石牙珐琅样年龄的平均值为３５５±４２ｋａ。基于铀早期加入模式的ＥＳＲ测年的合理性为同地层牙化石样和方解石样的不平衡铀系测量所验证。研究结果认为南京直立人在时代上与晚期北京人相当而早于和县直立人。

Five fossil tooth enamel samples collected from the stratum of the Nanjing Homo erectus were ESR dated The average age is 355±42ka,based on the early uranium-uptake model Additional uranium series measurement of fossil teeth confirms the appropriateness of the early uranium-uptake model for these ESR samples Considering also the uranium-series ages of two calcite samples from the flowstone covering the fossil-containing stratum, an age value of 350±50ka for the Nanjing Homo erectus stratum is evaluated, which means that the Nanjing Homo erectus appeared in the late stage of Peking Man and also in the stage of human evolution earlier than Hexian Homo erectus