文章基本信息

标题：Influence of increasing combustion temperature on the AMS ¹⁴C dating of modern crop phytoliths
本地全文：下载
作者：Jinhui Yin ; Xue Yang ; Yonggang Zheng 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2014
卷号：4
DOI：10.1038/srep06511
出版社：Springer Nature
摘要：Several attempts have been made to directly date phytoliths, but most ¹⁴C results are not consistent with other independent chronologies. Due to the limited dataset, there is not a clear explanation for these discrepancies. Herein, we report the ¹⁴C ages of phytolith-occluded carbon (PhytOC) from contemporary rice and millet crops that were combusted at different temperatures to investigate the relationship between the combustion temperature and resulting ¹⁴C age. Our results show that the ¹⁴C age of PhytOC increases directly with combustion temperature (up to 1100°C) and results in age overestimations of hundreds of years. Considerably older ages are observed at higher temperatures, suggesting that it may be possible to distinguish between two fractions of organic carbon in phytoliths: labile and recalcitrant carbon. These findings challenge the assumption that PhytOC is homogeneous, an assumption made by those who have previously attempted to directly date phytoliths using ¹⁴C.