本文公布的~(14)C年代数据52个(表1),其中除CG112、CG113、CG114、CG115、CG117样品,应用乙炔气体计数法测定外,其余样品皆为液体闪烁计数法测定。实验方法同我实验室于“地质科学”1974年第四期和1978年第四期发表的报导。 计算年代所采用的~(14)C半衰期为5570年,距今计年以1950年为起点。采样地点和层位是根据送样单位提供的资料整理。所标误差是测量结果按泊松分布计算的标准偏差。 The data of ~ (14) C published in this paper are 52 (Table 1). The samples of CG112, CG113, CG114, CG115 and CG117 were measured by acetylene gas counting method and the other samples were all determined by liquid scintillation counting. The experimental method is the same as that published by our laboratory in the fourth issue of Geological Science in 1974 and the fourth issue in 1978. The calculated half-life of ~ (14) C used in the age of 5570, dating back to the 1950s as a starting point. Sampling locations and levels are based on the information provided by the sending unit to sort out. The standard error is the standard deviation of the measurement as a Poisson distribution.