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Investigating the potential of HCI-only treated samples using range-finder OSL dating

机译：使用测距仪OSL约会调查仅使用HCI处理的样品的潜力

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Rapid sample preparation and measurement protocols for optically stimulated luminescence (OSL) dating have been investigated as a method of increasing the throughput of samples (e.g. Roberts et al. 2009). Here, we investigate the potential of dating samples treated using only hydrochloric acid (HCI) for providing accurate range-finder ages for quartz. The equivalent dose (D-e) is underestimated for older samples using a standard single-aliquot regenerative-dose (SAR) protocol, but measurement of the post-IR OSL signal (e.g. Roberts and Wintle, 2003) provides D-e estimates within 15% of the 'target fully prepared D-e' for two-thirds of samples. The application of a standardised growth curve (SGC) is also investigated. For these dune samples, the most efficient preparation and measurement procedure from which accurate De estimates can be obtained is treatment with HO-only, measurement of the natural and regenerative post-IR OSL signal, and calculation using a region-independent SGC. A slightly longer protocol incorporating an additional preparation stage of heavy liquid density separation can be used to improve D-e estimates in samples where feldspar-contamination is thought to be particularly problematic. In practice, these time savings of days to weeks in the preparation and measurement protocols mean that a large number of samples can first be rapidly treated with HCI, the post-IR blue OSL signal measured using a shortened double-SAR protocol, and D-e calculated by applying an independent SGC before then deciding which samples require full preparation and measurement, rather than the inefficiency of committing time and resources to all samples if this is unnecessary for the context of a particular suite of samples. The potential of this rapid preparation and measurement protocol is discussed in relation to sand dune dating studies. (C) 2014 Elsevier B.V. All rights reserved.
机译：作为增加样品通量的一种方法，已经研究了用于光激发发光（OSL）测年的快速样品制备和测量方案（例如Roberts等，2009）。在这里，我们研究了仅使用盐酸（HCI）处理的约会样品为石英提供精确测距仪年龄的潜力。使用标准的单等分再生剂量（SAR）协议，对于较旧的样品，等效剂量（De）被低估了，但是IR后OSL信号的测量（例如Roberts和Wintle，2003年）提供了De估计值的15％以内对三分之二的样品进行“目标充分准备的De”。还研究了标准增长曲线（SGC）的应用。对于这些沙丘样品，从中可以获得准确的De估计值的最有效的准备和测量过程是仅使用HO处理，测量自然和再生IR OSL信号，以及使用与区域无关的SGC进行计算。在认为长石污染特别成问题的样品中，可以采用稍长一些的方案并入重液体密度分离的附加制备阶段，以改善D-e估算值。实际上，在准备和测量方案中节省了几天到几周的时间，这意味着首先可以使用HCl快速处理大量样品，使用缩短的double-SAR方案测量IR后蓝色OSL信号，并计算De通过应用独立的SGC，然后再决定哪些样本需要进行充分的准备和测量，而不是浪费时间和资源来浪费所有样本（如果对于特定的样本套件而言，这是不必要的）。关于沙丘测年研究，讨论了这种快速准备和测量方案的潜力。 （C）2014 Elsevier B.V.保留所有权利。

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