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对渤海30多个表层样作了粘土矿物分析,结果表明,广泛存在的粘土矿物是伊利石、高岭石、绿泥石和蒙脱石。伊利石为优势矿物,平均含量为60％;次之为高岭石,平均18％;绿泥石与蒙脱石为次要矿物,平均都在10％左右。 渤海粘土矿物在表层沉积物中的分布图式受物源控制,其中黄河的入海泥沙影响最大。海区的水动力特征与地球化学环境(如盐度)也是影响粘土矿物分布的重要因素。根据粘土矿物的分布与组合特征,可将渤海划分为两个矿物省:辽东湾矿物省与渤海湾-莱洲湾矿物省,而这后一个矿物省明显地反映了黄河泥沙入海后的运移、扩散与沉淀的特征,这对渤海沉积物来源的研究以及了解黄河三角洲的形成过程与对它的开发利用都是有意义的。
Clay mineral analysis of more than 30 surface samples of the Bohai Sea shows that the widespread clay minerals are illite, kaolinite, chlorite and montmorillonite. Illite is the dominant mineral, with an average content of 60%; followed by kaolinite, an average of 18%; and chlorite and montmorillonite as secondary minerals, with an average of about 10%. The distribution pattern of the clay minerals in the surface sediments in the Bohai Sea is controlled by provenance, of which the Yellow River has the greatest impact on sediment transport. The hydrodynamic characteristics of the sea area and the geochemical environment (such as salinity) are also important factors affecting the distribution of clay minerals. According to the distribution and combination characteristics of clay minerals, the Bohai Sea can be divided into two mineral provinces: Liaodong Bay Mineral Province and Bohai Bay-Laizhou Bay Mineral Province, and the latter mineral province clearly reflects the Yellow River sediment transport into the sea The characteristics of migration, diffusion and sedimentation all contribute to the study of the source of sediments in the Bohai Sea, as well as to understand the formation process of the Yellow River Delta and its development and utilization.