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首页> 外文期刊>Journal of Asian earth sciences >Residual luminescence in modern debris flow deposits from western Taiwan: A single grain approach
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Residual luminescence in modern debris flow deposits from western Taiwan: A single grain approach

机译：台湾西部现代泥石流沉积物中的残留发光：单颗粒方法

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摘要

In an active fold-and-thrust belt, sediment is commonly transported in the form of debris and colluviums, and the ages of such deposits can be important for seismic hazard assessment. These sediments are mainly transported by high concentration flows that travel very short distances before burial, and therefore have very few opportunities for daylight exposure and bleaching, which limits the application of luminescence dating in such environments. Luminescence studies on modern debris flow deposits and channel sediments in central Taiwan indicate a mixed population of bleached and unbleached grains. The well bleached grains constitute a small proportion of the sediments and could only be identified using the single grain dating technique; doing single aliquot analysis may result in overestimation of the age of such sediments by 3-25 ka. The data reveal that outwash sediments are better bleached than debris flow sediments. Our results show that quartz that has experienced partial resetting can be used for luminescence dating only through the use of the single grain technique.
机译：在活动的褶皱冲断带中，沉积物通常以碎屑和裂缝的形式运输，而这类沉积物的年龄对于地震危险性评估可能很重要。这些沉积物主要由高浓度流运走，这些流在埋葬前经过很短的距离，因此几乎没有机会暴露于日光和褪色，这限制了在此类环境中进行发光测年的应用。台湾中部现代泥石流沉积物和河道沉积物的发光研究表明，漂白和未漂白的谷物混合在一起。漂白得很好的谷物只占沉积物的一小部分，只能使用单粒测年技术来鉴定；进行单等份分析可能会使此类沉积物的年龄高估3-25 ka。数据显示，冲刷沉积物比泥石流沉积物的漂白效果更好。我们的结果表明，经历了部分复位的石英只能通过使用单颗粒技术才能用于发光测年。

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  • 来源
    《Journal of Asian earth sciences》 |2010年第6期|p.274-282|共9页
  • 作者

    Tzu-Shuan Wu; Manoj Kumar Jaiswal; Yunong Nina Lin; Ya-Wen Chen; Yue-Gau Chen;

  • 作者单位

    Department of Geosciences, National Taiwan University, Roosevelt Road, No. 1, Sec. 4, Taipei-10617, Taiwan, ROC;

    Department of Geosciences, National Taiwan University, Roosevelt Road, No. 1, Sec. 4, Taipei-10617, Taiwan, ROC Department of Earth Sciences, Indian Institute of Science Education and Research Kolkata (IISER-K), Mohanpur campus, Nadia, West Bengal 741246, India;

    Department of Geosciences, National Taiwan University, Roosevelt Road, No. 1, Sec. 4, Taipei-10617, Taiwan, ROC;

    Department of Geosciences, National Taiwan University, Roosevelt Road, No. 1, Sec. 4, Taipei-10617, Taiwan, ROC;

    Department of Geosciences, National Taiwan University, Roosevelt Road, No. 1, Sec. 4, Taipei-10617, Taiwan, ROC;

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  • 正文语种 eng
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  • 关键词

    optical dating; SAR; OSL dating; single grain OSL dating; debris flow in taiwan;

    机译：光学约会SAR;OSL约会;单粒OSL测年;台湾的泥石流;

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