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Luminescence dating of Weichselian interstadial sediments from the German Baltic Sea coast

机译：德国波罗的海沿岸魏氏分布的沉积物的发光年代

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A cliff outcrop called Kluckow, in the Baltic Sea area, with a (glacio-) fluvial to (glacio-) lacustrine succession, provides a unique opportunity to resolve uncertainties in the timing and extent of several poorly constrained Weichselian ice advances. Based on a detailed lithofacies analysis, we selected four sampling horizons for luminescence dating to determine a depositional chronology. We measured both coarse-grain quartz and potassium-rich feldspar for age determination using optically stimulated luminescence (OSL) and post-IR infrared stimulated luminescence (pIRIR). Furthermore we addressed potential problems such as incomplete bleaching and quartz saturation effects. The resulting luminescence-chronology, supported by one radiocarbon age, illustrates a depositional time interval of the investigated sequence between similar to 62 and similar to 22 ka. Within this sequence a mussel-bearing fluvial sand indicate interstadial climate conditions at approximately 46 ka. The upper part of the section is composed of a 4 m thick glaciolacustrine silty clay and an overlying glaciofluvial sand; the latter yielded an OSL age of similar to 22 ka. Shortly after these sequences formed, the subsequent ice advance (indicated by the overlying till sheet) reached the study area. Based on our new chronology and lithofacies analysis, we conclude that the Scandinavian Ice Sheet did not reach the study area between similar to 62 and similar to 22 ka. (C) 2015 Elsevier B.V. All rights reserved.
机译：波罗的海地区的悬崖露头叫做克拉科夫（Kluckow），河流（冰川）到（冰川）湖泊相继演替，提供了一个难得的机会，可以解决维希瑟尔冰河发展受限的时间和范围的不确定性。基于详细的岩相分析，我们为发光测年选择了四个采样层，以确定沉积年代。我们使用光学激发发光（OSL）和红外后红外激发发光（pIRIR）测量了粗晶石英和富钾长石的年龄，从而确定了年龄。此外，我们还解决了潜在问题，例如漂白不完全和石英饱和效应。由一个放射性碳年龄支持的最终发光年代，说明了所研究序列的沉积时间间隔介于相似的62和相似的22 ka之间。在该序列内，含贻贝的河床砂指示了大约46 ka的陆间气候条件。该部分的上部由4 m厚的冰川湖粉质粘土和上覆的冰川河砂组成。后者的OSL年龄大约为22 ka。在这些序列形成后不久，随后的冰层前进（由覆盖的表层指示）到达研究区域。根据我们的新的年代学和岩相分析，我们得出结论，斯堪的纳维亚冰盖没有到达研究区介于62 ka和22 ka之间。 （C）2015 Elsevier B.V.保留所有权利。

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