Accelerator Mass Spectrometry Radiocarbon Dating of Arctic Pollen

北极花粉的加速器质谱放射性碳测年

• 批准号: 9123963
• 负责人: Pieter Grootes
• 金额: $ 14.46万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-07-15 至 1996-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9123963&HistoricalAwards=false
• 关键词: Accelerator; Mass; Spectrometry; Radiocarbon; Dating

This award is in support of one element of the project: Paleoclimates from Arctic Lakes and Estuaries (PALE). The study of pollen in sedimentary deposits has been one of the primary sources of information on continental paleoenvironments and will undoubtedly be one of the predominant proxy climate indicators in the reconstruction of Arctic paleoenvironmental conditions. This project will refine and further test techniques for the extraction of pollen from sedimentary deposits for dating by radiocarbon accelerator mass spectrometry. These extraction techniques have recently been shown to be effective in isolating pollen from contaminants that are probably responsible for significant inconsistencies and uncertainties in sediment dates obtained by the traditional method of 14C radioactive decay dating of bulk sediment samples. The development of improved pollen extraction and radiocarbon dating techniques will greatly facilitate the preparation and dating of samples of interest to the general palynology and paleoecology research communities.

该奖项是为了支持该项目的一个组成部分：北极湖泊和河口的古气候（PALE）。 对沉积物中花粉的研究一直是大陆古环境信息的主要来源之一，并且无疑将成为重建北极古环境条件的主要代理气候指标之一。 该项目将完善并进一步测试从沉积物中提取花粉的技术，以通过放射性碳加速器质谱法测定年代。 这些提取技术最近已被证明可以有效地将花粉与污染物分离，这些污染物可能是通过对大量沉积物样品进行 14C 放射性衰变测年的传统方法获得的沉积物日期中出现显着不一致和不确定性的原因。 改进的花粉提取和放射性碳测年技术的发展将极大地促进一般孢粉学和古生态学研究界感兴趣的样品的制备和测年。