长江口及近岸海域沉积物元素地球化学背景值

Geochemical background values of sediments in the Yangtze Estuary and offshore marine areas

以上海市近岸海域多目标区域地球化学调查取得的区域地球化学资料为依据,遵循地球化学背景值基本概念,分别计算了全区、不同沉积物类型、不同沉积单元的元素地球化学背景值,并和全国土壤、长江三角洲表层土壤、中国浅海沉积物等背景值进行了对比研究,为区域沉积物环境质量标准的制订、沉积物污染评价和长江口环境演化对比提供了重要的地球化学依据。

Based on data from a multipurpose regional geochemical survey of Shanghai’s offshore marine areas,the geochemical background values of elements of different sediments and sedimentary areas were calculated.These data were then compared with national soils data,surface soil data from the Yangtze River Delta,and shallow sea sediment data from China.This study provides an important geochemical basis for:(1)developing regional sediment environmental quality standards,(2)evaluating sediment pollution,and(3)analyzing the environmental evolution of the Yangtze Estuary.