Bernd Zolitschka, Frank Preusser, Junjie Zhang, Ines Hogrefe, Nikolaus Froitzheim, Philipp Böning, Patrick Schläfli, Felix Bittmann, Franz Binot, Manfred Frechen
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引用次数: 0
Abstract
The stratigraphy and dating of lacustrine sediments and loess derivatives from Rodderberg, a crater of the East Eifel Volcanic Field in Germany, is based on luminescence dating and incorporates radiocarbon ages, fingerprinting of key tephra layers of the East Eifel Volcanic Field (Rieden Tephra, Hüttenberg Tephra, Laacher See Tephra), pollen stratigraphy, varve counting data, and a correlative age–depth model. These methods yield a robust age–depth model for the last 258 ka. Beyond this, luminescence ages differ from tephra-derived ages. In light of the apparent presence of the Rieden Tephra, the lowermost interglacial is assigned to Marine Isotope Stage (MIS) 11 or 420 ka. This provides a high-resolution record of environmental conditions representing an analogue for the Holocene, characterized by a warming planet. However, new luminescence ages may indicate a younger age for basal sediments, with the lowermost interglacial representing MIS 9. Both age–depth models constrain regional environmental changes during the Middle Pleistocene controlled by global climate variations. For the hydrologically closed nature of the Rodderberg crater, with limited pathways for sediment inflow and erosional export, these results shed new light on the continuity of long Middle Pleistocene records.
德国东埃菲尔火山场罗德贝格火山口的湖相沉积物和黄土衍生物的地层学和测年方法以发光测年为基础,并结合了放射性碳年龄、东埃菲尔火山场主要表岩层(里登表岩层、胡特滕贝格表岩层、拉赫尔西表岩层)的指纹图谱、花粉地层学、变粒计数数据和相关年龄深度模型。这些方法为过去 258 ka 年建立了一个可靠的年龄深度模型。除此以外,发光年龄与来自于凝灰岩的年龄有所不同。鉴于里登坑石的明显存在,最下一个间冰期被定为海洋同位素阶段(MIS)11 或 420 ka。这提供了环境条件的高分辨率记录,代表了以地球变暖为特征的全新世。然而,新的发光年龄可能表明基底沉积物的年龄更小,最下一个间冰期代表 MIS 9。两种年龄-深度模型都制约了中更新世期间受全球气候变化控制的区域环境变化。由于罗德贝格陨石坑水文封闭,沉积物流入和侵蚀输出的途径有限,这些结果为中更新世漫长记录的连续性提供了新的启示。
期刊介绍:
The Journal of Quaternary Science publishes original papers on any field of Quaternary research, and aims to promote a wider appreciation and deeper understanding of the earth''s history during the last 2.58 million years. Papers from a wide range of disciplines appear in JQS including, for example, Archaeology, Botany, Climatology, Geochemistry, Geochronology, Geology, Geomorphology, Geophysics, Glaciology, Limnology, Oceanography, Palaeoceanography, Palaeoclimatology, Palaeoecology, Palaeontology, Soil Science and Zoology. The journal particularly welcomes papers reporting the results of interdisciplinary or multidisciplinary research which are of wide international interest to Quaternary scientists. Short communications and correspondence relating to views and information contained in JQS may also be considered for publication.