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Sedimentation in the West Gotland Basin, Baltic Sea (from the Data of Core PSh-2537)

机译:波罗的海西哥特兰盆地的沉积(来自PSh-2537核心数据)

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摘要

We studied the grain-size, mineralogical and chemical composition, physical properties, radiocarbon age, spore-pollen spectra, and diatom composition in the sediments from core PSh-2537 sampled in the West Gotland Basin. Four lithological-stratigraphic units were distinguished: varved clays of the Baltic Ice Lake, black and black-gray (sulfide) clays of the Yoldian Sea, gray clays of Ancylus Lake, and greenish-gray sapropel-like littorine and post-littorine silts of the marine stage of the Holocene. These units differ from each other both in their matter composition and in plant remains. In the littorine silts, the determined C_org concentration reached from 1.5 to 10.35%. The conditions of the sediment accumulation and the stages of evolution of the West Gotland Basin over the post-glacial time are characterized.
机译:我们研究了在西哥特兰盆地采样的PSh-2537岩心沉积物中的粒度,矿物学和化学组成,物理性质,放射性碳年龄,孢子花粉光谱和硅藻组成。区分了四个岩性地层单元:波罗的海冰湖的黏土,Yoldian海的黑色和黑灰色(硫化物)黏土,Ancylus湖的灰色黏土,以及灰绿色的腐烂的类腐殖土和全新世的海洋阶段。这些单位的物质组成和植物残渣彼此不同。在滨海淤泥中,确定的C_org浓度从1.5到10.35%。分析了冰川期后西哥特兰盆地的沉积物堆积条件和演化阶段。

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