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通过对青岛田横岛北岸THD柱状样的沉积层序、粒度参数和碎屑矿物系统分析,揭示了其形成与滨岸潮滩相沉积环境有关。该柱状样主要由细砂和粉砂质砂组成,可大致分为3层,上下2层主要为细砂和粉砂质砂,中间层是中、细砂。整个柱样表现出分选程度差、风化程度低、不稳定矿物含量高的特点,表明沉积物分选改造不明显,反映出物源为原地或近源沉积特征。
Through the analysis of sedimentary sequence, grain size parameters and detrital mineral systems of the THD columnar pattern on the northern bank of Tianheng Island in Qingdao, it is revealed that its formation is related to the depositional environment of the tidal bank facies. The column-like sample is mainly composed of fine sand and silty sand, which can be roughly divided into three layers, upper and lower two layers are mainly fine sand and silty sand, and the middle layer is medium and fine sand. The whole column showed the characteristics of poor sorting, low degree of weathering and high unstable mineral content, indicating that sediment sorting and reformation is not obvious, which indicates that the provenance is of in-situ or near-source sedimentary characteristics.