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首页> 外文期刊>Quaternary geochronology >OSL dating of fine and coarse quartz from a Palaeolithic sequence on the Bistrita Valley (Northeastern Romania)
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OSL dating of fine and coarse quartz from a Palaeolithic sequence on the Bistrita Valley (Northeastern Romania)

机译：比斯特里塔河谷（罗马尼亚东北部）旧石器时代细，粗石英的OSL测年

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Previous works focused on optically stimulated luminescence dating of quartz extracted from Romanian and Serbian loess reported significant discrepancies between ages obtained on fine (4-11 mu m) and coarse (63-90 mu m) quartz. The present study is directed at expanding these investigations. The SAR-OSL and double SAR-OSL protocols are applied on quartz of different grain sizes belonging to 9 samples extracted from a newly identified archaeological site at Bistricioara-Lutarie III on the Bistrita Valley (NE Romania). Radiocarbon ages are also obtained for the 3 uppermost cultural layers hosted in the loess-like deposit. Discrepant ages are obtained between fine (4-11 mu m) and coarse (63-90 and 90-200 mu m, respectively) quartz for equivalent doses higher than similar to 80-100 Gy. However, a very good agreement is achieved for the youngest sample, with an age of similar to 8 ka (with a D-e of 38 Gy for fine and 35 Gy for coarse grains, respectively). The comparison with independent control provided by radiocarbon dating suggests better agreement of ages calculated for coarse quartz. Our results are once again proof that concerns should be raised regarding the reliability of the equivalent doses obtained on quartz samples for which the laboratory dose response cannot be fitted by a single saturating exponential function. Further systematic investigations are required regarding the very different saturation characteristics of fine and coarse grained quartz. (C) 2014 Elsevier B.V. All rights reserved.
机译：以前的工作集中在从罗马尼亚和塞尔维亚黄土中提取的石英的光激发发光测年，报道了在细（4-11微米）和粗（63-90微米）石英上获得的年龄之间存在显着差异。本研究旨在扩大这些研究。 SAR-OSL和双重SAR-OSL协议适用于不同粒度的石英，这些石英属于9个样品的样品，这些样品是从新鉴定的Bistrita谷地Bistricioara-Lutarie III（罗马尼亚东北）的考古现场提取的。黄土状沉积物中最上层的三个文化层也获得了放射性碳年龄。对于等效（高于80-100 Gy）的等效剂量，可以得到细（4-11微米）和粗（分别为63-90和90-200微米）石英之间的年龄差异。但是，对于最年轻的样品，年龄大约为8 ka（对于细颗粒的D-e为38 Gy，对于粗颗粒的D-e分别为38 Gy），达成了很好的协议。与放射性碳测年提供的独立控制的比较表明，对于粗石英计算的年龄具有更好的一致性。我们的结果再次证明，应该关注石英样品上获得的等效剂量的可靠性，因为石英样品的实验室剂量响应无法通过单个饱和指数函数来拟合。关于细晶粒和粗晶粒石英的非常不同的饱和特性，需要进行进一步的系统研究。 （C）2014 Elsevier B.V.保留所有权利。

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