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首页> 外文期刊>Journal of Environmental Radioactivity >210Pb-dating of a lake sediment core from Lough Carra (Co. Mayo, western Ireland): use of paleolimnological data for chronology validation below the 210Pb dating horizon
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210Pb-dating of a lake sediment core from Lough Carra (Co. Mayo, western Ireland): use of paleolimnological data for chronology validation below the 210Pb dating horizon

机译：来自拉夫卡拉（西爱尔兰梅奥市）的湖沉积物芯的210Pb测年：在210Pb测年以下的古年代学数据用于年代学验证

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摘要

The chronologies and sediment accumulation rates for a lake sediment sequence from Lough Carra (Co. Mayo, western Ireland) were established by applying the constant initial concentration (C1C) and constant rate of supply (CRS) hypotheses to the measured 210Pbexcess profile. The resulting chronologies were validated using the artificial fallout radionuclides 137Cs and 241Am, which provide independent chronostratigraphic markers for the second half of the 20th century. The validity of extrapolating the derived CIC and CRS dates below the 210Pb dating horizon using average sedimentation rates was investigated using supplementary paleolimnological information and historical data. Our data confirm that such an extrapolation is well justified at sites characterised by relatively stable sedimentation conditions.
机译：通过将恒定的初始浓度（C1C）和恒定的供给速率（CRS）假设应用于所测得的210Pbexcess轮廓，确定了来自拉夫卡拉（西爱尔兰梅奥公司）的湖泊沉积物序列的时间顺序和沉积物积累速率。使用人工辐射放射性核素137Cs和241Am验证了由此产生的年代，它们为20世纪下半叶提供了独立的年代地层标记。使用补充的古湖泊学资料和历史数据，研究了使用平均沉降速率外推得出的在210Pb测年以下的CIC和CRS日期的有效性。我们的数据证实，在以相对稳定的沉积条件为特征的地点，这种推断是合理的。

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  • 来源
    《Journal of Environmental Radioactivity》 |2011年第5期|p.495-499|共5页
  • 作者

    J. OReilly; L Leon Vintro; P.I. Mitchell; I. Donohue; M. Leira; W. Hobbs; K. Irvine;

  • 作者单位

    UCD School of Physics. University College Dublin, Belfield, Dublin 4, Ireland;

    UCD School of Physics. University College Dublin, Belfield, Dublin 4, Ireland;

    UCD School of Physics. University College Dublin, Belfield, Dublin 4, Ireland;

    School of Natural Sciences, Trinity College Dublin, Ireland;

    Faculty of Sciences, Universidade A Coruna, Spain;

    School of Natural Sciences, Trinity College Dublin, Ireland;

    School of Natural Sciences, Trinity College Dublin, Ireland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    pb-210 dating; crs model; lake sediment chronology; paleolimnological data;

    机译：pb-210测年;crs模型;湖泊沉积物年代学;古湖泊学数据;

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