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首页> 外文期刊>Paleoceanography >Rapid radiocarbon (~(14)C) analysis of coral and carbonate samples using a continuous-flow accelerator mass spectrometry (CFAMS) system
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Rapid radiocarbon (~(14)C) analysis of coral and carbonate samples using a continuous-flow accelerator mass spectrometry (CFAMS) system

机译：使用连续流加速器质谱（CFAMS）系统对珊瑚和碳酸盐样品进行快速放射性碳（〜（14）C）分析

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摘要

Radiocarbon analyses of carbonate materials provide critical information for understanding the last glacial cycle, recent climate history and paleoceanography. Methods that reduce the time and cost of radiocarbon (~(14)C) analysis are highly desirable for large sample sets and reconnaissance type studies. We have developed a method for rapid radiocarbon analysis of carbonates using a novel continuous-flow accelerator mass spectrometry (CFAMS) system. We analyzed a suite of deep-sea coral samples and compared the results with those obtained using a conventional AMS system. Measurement uncertainty is <0.02 Fm or 160 Ryr for a modern sample and the mean background was 37,800 Ryr. Radiocarbon values were repeatable and in good agreement with those from the conventional AMS system. Sample handling and preparation is relatively simple and the method offered a significant increase in speed and cost effectiveness. We applied the method to coral samples from the Eastern Pacific Ocean to obtain an age distribution and identify samples for further analysis. This paper is intended to update the paleoceanographic community on the status of this new method and demonstrate its feasibility as a choice for rapid and affordable radiocarbon analysis.
机译：碳酸盐材料的放射性碳分析为了解最后一次冰川周期，近期气候史和古海洋学提供了重要信息。对于大型样本集和侦察类型研究，非常需要减少放射性碳（〜（14）C）分析的时间和成本的方法。我们已经开发了一种使用新型连续流加速器质谱（CFAMS）系统对碳酸盐进行快速放射性碳分析的方法。我们分析了一套深海珊瑚样品，并将结果与​​使用常规AMS系统获得的结果进行了比较。现代样品的测量不确定度小于0.02 Fm或160 Ryr，平均背景为37,800 Ryr。放射性碳值是可重复的，并且与常规AMS系统的放射性碳值一致。样品处理和制备相对简单，该方法显着提高了速度和成本效益。我们将该方法应用于来自东太平洋的珊瑚样本，以获得年龄分布并确定样本以进行进一步分析。本文旨在向古海洋学界更新这种新方法的现状，并展示其作为快速，可负担的放射性碳分析的选择的可行性。

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