Age and evolution of the Littorina Sea in the light of geochemical analysis and radiocarbon dating sediment of cores from the Arkona Basin and Mecklenburg Bay (SW Baltic Sea)

R. Kostecki
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引用次数: 3

Abstract

Two sediment cores from the Mecklenburg Bay and Arkona Basin were analysed in terms of their geochemical composition and stratigraphy. The main stages of the Baltic Sea evolution – Baltic Ice Lake, Ancylus Lake, and Littorina Sea – were identified in both analysed cores. The most pronounced period was the transition between the Ancylus Lake and the Littorina Sea. The character of the initial stage of the Littorina Sea was clearly defined in the Mecklenburg Bay sediments and is marked by a stepwise increase in loss on ignition and contents of biogenic silica, calcium, magnesium, iron, and strontium. The record of the onset of the Littorina Sea in the Arkona Basin sediments is marked by an abrupt change of the geochemical parameters. The age of the initial Littorina Sea in the Mecklenburg Bay was estimated at about 8200 cal years BP and was probably older than the transgression within the Arkona Basin.
波罗的海西南部Arkona盆地和Mecklenburg湾岩心沉积物的地球化学分析和放射性碳定年研究
对来自Mecklenburg湾和Arkona盆地的两个沉积物岩心进行了地球化学组成和地层学分析。波罗的海演化的主要阶段——波罗的海冰湖、Ancylus湖和Littorina海——在两个分析的岩心中都被确定。最明显的时期是安丘勒斯湖和利托里纳海之间的过渡时期。在梅克伦堡湾沉积物中可以清楚地确定滨海海初始阶段的特征,其标志是燃烧损失和生物成因二氧化硅、钙、镁、铁和锶的含量逐步增加。Arkona盆地沉积中Littorina海开始的记录以地球化学参数的突变为标志。梅克伦堡湾初始Littorina海的年龄估计约为8200 cal BP,可能比Arkona盆地内的海侵更早。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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