沉积物中硬质粘土层的研究进展

Research Progress of Hard Clay Layers in Sediments

摘要:

大量的钻孔资料表明，平原地区及其海域沉积物中普遍有硬质粘土层的存在。硬质粘土层在工程地质、地理学研究等方面具有重要的价值，它不仅是高层建筑的持力层，而且是研究全球环境变化事件、古气候演变的良好载体。该文阐述了硬质粘土层的一般特征、成因以及在粒度、地球化学元素、年代学、沉积环境等方面的研究进展，并展望了硬质粘土层在年代、物质来源和沉积环境等方面的研究方向，认为黄河三角洲硬质粘土层研究较少，需要开展大范围的、系统深入的、多学科的宏观和微观综合分析，挖掘硬质粘土层蕴含的古环境意义和应用价值。

Abstract:

A large amount of drilling data indicate that there exists hard clay layers in the sediments of plain area and its sea area. The hard clay layers have great values in engineering geology and geography research. The hard clay layers are not only the bearing layers of high buildings, but also a good carrier for studying change events of global environment and the evolution of paleoclimate. In this paper, developing progress on general characteristics, origin, granularity, geochemical elements, geochronology and sedimentary environment of hard clays have been introduced, and the research direction of hard clay layers in the age, material source and sedimentary environment has been prospected. It is considered that the study of hard clay layers in the Yellow River delta is less. A large scale, systematic and comprehensive macroscopic and microcosmic analysis should be carried out, and Paleo-environment information and application value of hard clay layers should be explored.