辽宁海岸带沉积物的化学特征及其相互关系的研究

本文利用辽宁海岸带沉积物的1856个化学样品的分析资料,探讨了该区沉积物的化学要素含量与分布特征,并着重分析了各化学要素间的相互关系及其与沉积环境的关系等。

Reseach on Chemical Characteristics of Sediments and Their Relationships in Coastal Zone of Liaoning Province

This paper describes the features of contents and distribution of macro elements and trace elements,and analyses the relationships among chemical elements and their relation with sedimentary environment and sediment types based on the data derived from investigation of sedimentary chemistry in coastal zone of Liaoning Province. The results show that the content distribution of elements are controlled obviously by the sedimentary environment and closely related to sedimentary types. The elements appear in positive correlations with Mdo values except SiO_2 which shows a negative correlation. The content distributions of Cu,Zn,Pb and Cd show the same features and among them fair relationships are found. Of the macro components,CaO versus CaCO_3,MgO versus Fe_2O_3 and total-N versus organic matter appear in fair correlations too. The content distributions of trace elements are slightly higher in the north Yellow Sea than those in Liaodong Bay, where unit distribution patterns are formed with the estuary and bay as centers. The lengthwise and breadthwise distributions and the transportation of the various chemical elements of the sediments are closely related to the factors such as bed form, hydrodynamic conditions,properties and sources of sediments and biota etc.. The lengthwise differences in the distribution of the sediments in the coastal area of the North Yellow Sea is that coarse grained sediments appear in the east and fine grained in the west,so that the contents of trace elements in the east are lower than those in the west. Meanwhile, the breadthwise mass fraction of tideland presents a trend of the contents of trace elements of high tideland being higher than those of low tideland. The contents of macro elements show the similar trends except that of SiO_2.