Effect of dead carbon on the 14C dating of the speleothem
Based on the comparison of dating results among high-precision TIMS U-series and AMS 14C as well as the published 14C dating results and their band counting ages (i.e. calendar ages), this paper discusses the effect of dead carbon on the speleothem 14C dating. The result shows that the fraction of incorporated dead carbon during the formation of speleothem varies. The change in the fraction of dead carbon would result in big deviation in the 14C age of the speleothem. It is indispensable to take the dead carbon into consideration when dating the speleothem using the 14C method or studying the atmospheric 14C concentration during the past with the speleothem.
作 者： CAI Yanjun Warren Beck PENG Zicheng Zhang Zhaofeng 作者单位： CAI Yanjun(State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075, China)Warren Beck(University of Arizona, Tucson, AZ 85721, USA)
PENG Zicheng(State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075, China;Department of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China)
Zhang Zhaofeng(Department of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China;University of Illinois-Urbana Champaign, Champaign, IL 61801, USA)
刊 名： 科学通报（英文版） SCI 英文刊名： CHINESE SCIENCE BULLETIN 年，卷(期)： 2005 50(8) 分类号： P5 关键词： speleothem 14C dating 'dead carbon' correction TIMS U-series age