Varved clay deposits from ice-dammed lakes are a particularly important and broadly applied raw material used for the production of high-quality ceramics (red bricks, roof tiles, etc.), but the mineralogy and geochemistry of these sediments are not fully understood. The aim of the present study was to determine the chemical and mineralogical composition of ice-dammed lake sediments of the Lębork deposit. Major-element analysis of the compositions of selected samples from the ice-dammed lake clays was performed by X-ray fluorescence (XRF) and trace elements were determined by inductively coupled plasma-mass spectrometry. The mineralogical composition of clay samples was determined by X-ray diffraction (XRD). Analyses of the chemical composition of the ice-dammed lake clays of the Lębork deposit showed that the dominant component was SiO₂ with a mean content of 56.13 wt.%; the second most abundant component was Al₂O₃, with a mean content for the entire deposit of 11.61 wt.%. Analysis by ICP-MS indicated the presence of rare earth elements (REE), e.g. cerium, neodymium, lanthanum, and praseodymium; their mean contents are: 56.9, 27.0, 26.3, and 7.3 ppm, respectively. Mineralogical analysis of the varved clays identified quartz, muscovite, calcite, and clay minerals – illite, kaolinite, and montmorillonite. The material filling the Lębork basin is characterized by small lateral and vertical variability in chemical composition. The results of the present study may be of considerable importance in determining the parent igneous, metamorphic, and sedimentary rocks, the weathering products of which supplied material to the ice-dammed lake, as well as in determining the mechanisms and character of the sedimentation process itself.

来自冰坝湖泊的变质粘土沉积物是一种特别重要且应用广泛的原材料，用于生产优质陶瓷（红砖、瓦等），但这些沉积物的矿物学和地球化学尚未完全了解。本研究的目的是确定 Lębork 矿床冰坝湖泊沉积物的化学和矿物组成。通过 X 射线荧光 (XRF) 对来自冰坝湖粘土的选定样品的成分进行主要元素分析，并通过电感耦合等离子体质谱法测定痕量元素。粘土样品的矿物组成通过 X 射线衍射 (XRD) 确定。对 Lębork 矿床冰坝湖粘土的化学成分分析表明，主要成分是 SiO₂平均含量为 56.13 wt.%；第二丰富的成分是 Al ₂ O ₃，整个沉积物的平均含量为 11.61 wt.%。ICP-MS 分析表明存在稀土元素 (REE)，例如铈、钕、镧和镨；它们的平均含量分别为：56.9、27.0、26.3 和 7.3 ppm。对斑纹粘土的矿物学分析确定了石英、白云母、方解石和粘土矿物——伊利石、高岭石和蒙脱石。填充 Lębork 盆地的材料的特点是化学成分的横向和纵向变化很小。本研究的结果可能对确定母体火成岩、变质岩和沉积岩（其风化产物为冰坝湖提供物质）以及确定沉积过程的机制和特征具有重要意义。本身。