摘要
为满足我国考古学、第四纪地质和环境研究中不断增长的^(14)C测年需求,国家文物局考古研究中心于2024年建成^(14)C测年实验室,可进行植物、动物、人骨和碳酸盐等样品的前处理和制样工作。经本实验室制成的石墨可直接进行加速器质谱测试,获得其所来源样品的^(14)C年代。为评估新建实验室的数据质量,本研究选取理论上不含^(14)C同位素的本底样品、年代已知的标准物质和经过北京大学测定年代的考古样品进行制样,并在两台稳定运行的加速器质谱进行测试。结果显示,本底样品的^(14)C年代几乎都在50 ka以上,标准物质的测定结果与其标准值在统计学上一致,对大部分考古样品的测试得出与北京大学一致的结果,同一样品的重复制样和测定也得到一致的结果。可见本实验室对50 ka以内的^(14)C年代测试可靠,能够满足考古和第四纪研究对^(14)C测年数据质量的要求。
To meet the growing demand for radiocarbon(^(14)C)dating in archaeology,Quaternary geology and environmental research in China,the National Centre for Archaeology(NACA)established a radiocarbon dating laboratory in 2024.This laboratory is capable of performing the pretreatment and graphitization processes for a variety of samples,including plant remains,animal and human bones,as well as carbonates.Graphite synthesized from these samples can therefore be measured by an accelerator mass spectrometer(AMS)to determine their radiocarbon ages.To evaluate the performance of this newly established laboratory,a series of comparisons have been carried out on background standards that do not contain radiocarbon isotope,oxalic standards with known radiocarbon ages,including the modern OXⅡ(SRM 4990c),IAEA-C7 with ca.50 pMC and IAEA-C8 with ca.15 pMC,as well as archaeological samples that have been measured by the well-established radiocarbon laboratory in Peking University.These standards and archaeological samples have been graphitized in our laboratory and measured by two stably running AMS laboratories.Results show that the radiocarbon ages of background samples are mostly above 50 ka,measurements of standards and archaeological samples show consistent results with their reference values,and repetitive measurements of the same samples produce consistent results.These results prove that our laboratory can generate reliable results for archaeological and Quaternary research samples within 50 ka,meeting the requirements for radiocarbon dating in these studies.
作者
闫欣
陈实
罗春乐
张治国
孙书文
YAN Xin;CHEN Shi;LUO Chunle;ZHANG Zhiguo;SUN Shuwen(National Centre for Archaeology,Beijing 100013,China;State Key Laboratory of Lithospheric and Environmental Coevolution,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;Laoshan Laboratory,Qingdao 266237,China)
出处
《第四纪研究》
北大核心
2025年第6期1405-1416,共12页
Quaternary Sciences
基金
国家文物局考古研究中心“中华文明起源、形成和早期国家建立阶段人群、技术与生业研究”项目(批准号:2025-C-KJ-001)资助。
