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Instant luminescence chronologies? High resolution luminescence profiles using a portable luminescence reader

机译:即时发光年代表?使用便携式发光读取器的高分辨率发光轮廓

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摘要

Establishing a robust chronology is fundamental to most palaeoenvironmental studies. However, the number and positioning of dated points is critical. Using a portable luminescence reader, it is possible to rapidly generate high resolution down core relative age profiles. Profiles of portable luminescence data from two coastal dunes were evaluated and compared with the results of particle size analysis, stratigraphy, and an independent historical chronology. Results show that, even in young samples, portable luminescence data is dominated by an age related signal which in homogeneous sediment need not be corrected for moisture, feldspar content changes or grain size. Profiles therefore provide relative chronologies from which accumulation phases can be established, and from which better targeted sampling and comparison to other sites could be undertaken. Even though they do not provide instant absolute chronologies, field-based portable luminescence profiling of Late Quaternary sites hold much potential to improve the resultant chronologies.
机译:建立健全的年代顺序是大多数古环境研究的基础。但是,日期标记的数量和位置至关重要。使用便携式发光阅读器,可以快速生成高分辨率的核心相对年龄分布图。评价了来自两个沿海沙丘的便携式发光数据的概况,并将其与粒度分析,地层学和独立的历史年代学的结果进行了比较。结果表明,即使在年轻的样品中,便携式发光数据也受到与年龄相关的信号的支配,该信号在均质沉积物中无需校正水分,长石含量变化或晶粒尺寸。因此,概况提供了相对的时间顺序,从中可以确定积累阶段,并且可以从中进行更好的针对性采样以及与其他站点的比较。即使它们不提供即时的绝对时间顺序,后期第四纪站点的基于字段的便携式发光分析也有很大的潜力来改善最终的时间顺序。

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