Late Pleistocene landscape dynamics in Saxony, Germany: Paleoenvironmental reconstruction using loess-paleosol sequences
Late Pleistocene landscape dynamics in Saxony, Germany: Paleoenvironmental reconstruction using loess-paleosol sequences
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DOI：
10.1016/j.quaint.2012.12.040
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发表时间：
2013-05
影响因子：
2.2
通讯作者：
Sascha Meszner;S. Kreutzer;M. Fuchs;D. Faust
中科院分区：
文献类型：
--
作者：
Sascha Meszner;S. Kreutzer;M. Fuchs;D. Faust
黄土档案对恢复区域过去冰期的古环境具有重要意义。萨克森黄土区是西欧和东欧黄土带之间的过渡区。有了这一贡献，一个记录的黄土-古土壤复合剖面的萨克森黄土地区的扩展，和一个新的年代地层，建立高分辨率光释光测年的两个配置文件，进行了说明。此外，第一次OSL年龄估计的黄土古土壤序列在Seilitz石英和多矿物细颗粒部分。基于所提出的复合剖面，推断出气候和环境条件（例如风速、温度）。根据高分辨率光释光测年，有可能确定一个跨越约1000公里的裂孔。30 ka.这个缺口位于Gleina复合体中，其下伏层显示年龄约为2000年。60 ka，上层年龄约为1000 ka。30 ka.此外，还发现了两次强黄土堆积，年代约为1000年。距今70-60 ka和30-18 ka。总的趋势是向晚冰期方向变粗，在约100 ℃时达到最大值。21 ka.与法国，西德和波兰黄土剖面的相关性进行了讨论。
Loess archives are of paramount importance for reconstructing regional paleoenvironmental conditions of past glacial periods. The Saxonian Loess Region is an area of transition between the western and the eastern European loess belt. With this contribution, a documented loess-paleosol composite profile for the Saxonian Loess Region is extended, and a new chronostratigraphy, established by high-resolution OSL dating of two profiles, is described. In addition, for the first time OSL age estimates for the loess paleosol sequence at Seilitz are presented for the quartz and polymineral fine grain fraction. Based on the presented composite profile climatic and environmental conditions (e.g. wind speed, temperature) are deduced. Based on high-resolution OSL dating it is possible to identify a hiatus spanning ca. 30 ka. This gap is located in the Gleina Complex where an underlying layer shows an age of ca. 60 ka and the upper layer an age of ca. 30 ka. Additionally, two periods of strong loess accumulation with ages of ca. 70–60 ka and 30–18 ka could be identified. There is a general trend of grain size coarsening-up towards the Late Glacial which shows a maximum at ca. 21 ka. Correlations with French, western German and Polish loess sections are discussed.