本文研究了珠江口-陆架-陆坡共12个站位表层沉积物中铜、铅和镉的6种地球化学形态的分配特征。各种金属的总形态含量沿珠江口-陆架-陆坡方向的分布依次呈马鞍型。金属形态的分散性随金属化学活性增强而增加。然而,三种金属的6种地球化学形态在这三个区域中的分配又具有各自的规律性。此外,还对各金属之间及某些形态之间进行了相关分析。 In this paper, six geochemical distributions of copper, lead and cadmium in surface sediments from 12 stations of the Pearl River Estuary, the continental shelf and the continental slope were studied. The distributions of the total morphological contents of various metals along the Pearl River Estuary - Shelf - Slope direction were saddle type. The dispersibility of the metal forms increases with increasing chemical activity of the metal. However, the distribution of the six geochemical forms of the three metals in these three regions has its own regularity. In addition, a correlation analysis was made between metals and some forms.