Late Pleistocene loess of the Lower Rhine
Late Pleistocene loess of the Lower Rhine
复制标题
莱茵河下游晚更新世黄土
DOI：
10.1016/j.quaint.2016.01.034
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发表时间：
2016
影响因子：
2.2
通讯作者：
W. Schirmer
中科院分区：
文献类型：
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作者：
W. Schirmer
从下莱茵河，一个25.7 m厚的晚更新世黄土-古土壤序列被划分为5个岩石地层单位：Rheingau段（MIS 5）、Keldach段（Weichselian Early Pleniglacial，GS-21.1-18，MIS 4）、Ahrgau段（Weichselian Middle Pleniglacial，MIS 3）和Hesbaye和Brabant段（Weichselian Late Pleniglacial，MIS 2）。它与冰芯和深海冰芯中已知的气候波动有很好的相关性。该序列连续采样335个样本。它贯穿了晚更新世上黄土组的所有基本层和土壤。连续的粗粉砂指数（CSI）曲线显示，在Hesbaye成员（31-24 ka b2 k）最大，表明在晚更新世早期最强的风力条件。进一步的CSI高点在于Keldach和早期Brabant成员。CSI低点位于莱茵高早、中段（GI-25-？GI-22），Jackerath-Spenrath土壤在更深的Keldach成员（？GI-20-19），早期Ahrgau段（GI-17-GI-12），最后是Brabant段底部的Elfgen土壤（GI-2）。有机碳在蒂茨腐殖质带达到顶峰，大概是在GI-21结束，表明在下面的冷下Weichselian Pleniglacial期间氧化不足。Garzweiler Solcomplex（MIS 5e-a）形成了130 ~ 78 ka BP的成土时期，被认为是间冰期复合体（莱茵河间冰期复合体），延续了MIS 7、9等较老间冰期复合体的风格。Ahr间冰期复合体（MIS 3）被认为是具有间冰期复合体结构的暖相不成熟复合体。- 作者建议：莱茵河间冰期复合体覆盖MIS 5e-a，并通过MIS 2将Weichselian冰川限制在MIS 4。这一过程遵循较古老的间冰期复合体的风格。
From the Lower Rhine a compiled 25.7 m thick Late Pleistocene loess-paleosol sequence is differentiated into five lithostratigraphic units: the Rheingau Member (MIS 5), the Keldach Member (Weichselian Early Pleniglacial, GS-21.1–18, MIS 4), the Ahrgau Member (Weichselian Middle Pleniglacial, MIS 3) and the Hesbaye and Brabant Members (Weichselian Late Pleniglacial, MIS 2). It correlates well with climate fluctuations known from ice cores and deep-sea cores. The sequence was continuously sampled by 335 samples. It cuts through all essential layers and soils of the Late Pleistocene Upper Loess Formation. A continuous coarse silt index (CSI) curve shows a maximum in the Hesbaye Member (31–24 ka b2k) indicating the strongest wind conditions during the early Late Pleistocene. Further CSI highs lie in the Keldach and early Brabant Members. CSI lows are found the early and middle Rheingau Member (GI-25–?GI-22), the Jackerath-Spenrath Soils within the deeper Keldach Member (?GI-20–19), the early Ahrgau Member (GI-17–GI-12) and finally in the Elfgen Soil (GI-2) at the base of the Brabant Member. The organic carbon culminates in the Titz Humus Zone, presumably at the end of GI-21, indicating scanty oxidation during the following cold Lower Weichselian Pleniglacial period. The Garzweiler Solcomplex forming a prevailing period of soil formation between 130 and 78 ka BP (MIS 5e–a) is considered as interglacial complex (Rhine Interglacial Complex) continuing the style of the older interglacial complexes of MIS 7, 9 etc. The Ahr Interstadial Complex (MIS 3) is seen as immature complex of warm phases with fabric of the interglacial complexes. – Author's suggestion: The Rhine Interglacial Complex covers MIS 5e–a and restricts the Weichselian Glacial to MIS 4 through MIS 2. This procedure follows the style of the older interglacial complexes.