上海市近岸海域表层沉积物类型与元素丰度相关关系特征

通过上海市近岸海域多目标区域地球化学调查,共采集947件表层沉积物样品,分析测试了52种化学元素以及pH值和有机碳等指标。总结了该区域表层沉积物及深层沉积物类型和分布特征,沉积物类型主要为细砂、粉砂质砂、砂质粉砂、粉砂、粘土质粉砂,其中粘土质粉砂分布最为广泛。元素含量与砂含量呈正相关的元素主要为SiO2、Sr、Na2O等。其它指标大都与粘土含量呈正相关关系。

Characteristics of correlation between the type of surface sediment and elemental abundance of inshore in Shanghai

During the coastline marine sediment Multi-purpose regional geochemical survey of Shanghai, the 947 top sediment samples are collected,and the 52 chemical elements, the pH va1ues and the organic carbon from the samples are under analyses and testing.The distribution and characteristics of surface sediment and sub sedminents was summarized.The main type of sediments are sand,silty sand,sandy silt,silt,clayey silt,and sediments of clayey silt is the most widely distributed.The results indicate that it is positive correlation between percent sand with SiO2, Sr, Na2O. It is positive correlation between percent clay with other elements.