关键词: 补给区, 汇入点, 粘土矿物, 粘性泥沙, 法方程, 黄海

Abstract: Clay at the Yellow Sea (the HuangHai Sea) is composed largely of clay with d<0.005mm, mineralogically. The most important constituents are clay minerals such as illite, montmonllonite, kalinte, chlorite etc.. According to characteristics of natural zone and their effect on composition of clay minerals, the source of cohesive sediment at the Yellow Sea can be considered as coming from 2 supplying regions, namely, the Yangtze River(X₁), the Yellow River and the abandoned Yellow River delta (x₂). The converging points are set up in the Yellow Sea area. Sampling stations are set up in the supplying regions and the converging points. Evaluation was made of clay minerals obtained out of sample from each sample by X-ray diffraction method, to ascertain their types, calculate their percentage, and work out the average percentage of clay mineral to represent the clay mineral composition of cohesive sediment at the Yellow Sea and its supplying regions. Clay mineral percentage thus worked out through evaluation of sediment samples from sample sites at the Yellow Sea and its supplying regions are listed in Table 1.

Key words: supplying region, converging point, clay mineral, clay cohesive sediment, Normal equation, Yellow Sea