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电子自旋共振与铀系联合法测定动物牙齿化石年代是目前我国早期人类活动遗址年代学研究中一种比较可行的测年手段。本文简单介绍了这一方法并探讨了其在测年中的一些基本问题,研究显示:1)对于早更新世地点的牙齿样品,采用双饱和指数函数拟合古剂量优于目前普遍采用的单饱和指数拟合;2)计算样品内部剂量时,在没有铀析出的情况下,US模式与早期(EU)和线性(LU)模式相比可以更客观的重建样品中铀的吸收历史;3)对于外部剂量在总剂量中所占比重较大的样品,在无法采用等时线法测年的情况下,野外γ剂量率的实地准确测量至关重要。电子自旋共振与铀系联合法有望应用于我国早更新世考古遗址的测年,但方法本身还需不断完善和发展。
Electron Spin Resonance and Uranium Series Combined Determination of Fossil Age in Animal Teeth is a comparatively feasible dating method in the study of chronology of early human activity sites in our country. This paper briefly introduced this method and explored some of its basic problems in the dating. The research shows that: 1) for the early Pleistocene tooth samples, the doubly saturated exponential function fitting ancient dose is better than the currently commonly used single Saturation Index Fitting; 2) US model can more objectively reconstruct the absorption history of uranium in the sample compared with the EU (EU) and linear (LU) modes in the absence of uranium precipitation when calculating the internal dose of the sample; 3) For samples whose external dose accounts for a large proportion of the total dose, accurate measurement of the field γ dose rate in the field can not be performed if isochronometry can not be adopted. Electron spin resonance and uranium series are expected to be applied to the dating of early Pleistocene archeological sites in our country, but the method itself needs continuous improvement and development.