The results indicate that the surface sediments are mostly derived from the Yellow River and can be divided into three types including clayey silt, sandy silt and silty sand.

• 结果表明，本区表层沉积物主要来源于现代黄河物质，底质类型主要有黏土质粉砂、砂质粉砂和粉砂质砂3种类型，其中黏土质粉砂约占该区沉积物分布面积的60%25以上，呈“Y”，形由西北向东南展布。