东海陆架沉积物中重金属地球化学研究

研究了东海陆架表层沉积物中的重金属含量分布特征,基本服从"粒度律",即随着沉积物的粒度变细而含量增高;区域分布的基本特征是高值区分布于中国台湾岛东侧和大陆近岸区域,低值区分布于东部及北部浅海大沙滩区;分析该区沉积物中重金属的地球化学特征及其分布规律采用无量纲分析,提出了重金属集散规律的多因子控制关系式,采用最小二乘法求得系数α、b及相关系数r:rZn=0.82,rCu=0.91,rPb=0.90,rCd=0.89,rHg=0.80,rCr=0.87.

Study on geochemistry of heavy metals in the sediment in the East China Sea continental shelf

In this article,the distribution characteristics of the concentrations of heavy metals in the sediments in the East China Sea continental shelf were studied,and accorded with the pattern of the increase of the concentrations of heavy metals and with the decrease of the sizes of sediments.The area,in which the concentrations of heavy metals in the sediments were high,was situated in the eastern sea areas of Taiwan and the coastal areas of mainland,and the area,in which the concentrations of heavy metals in the sediments were low,was the eastern and northern shallow waters of the East China Sea.The geochemistry characteristics and distribution pattern of heavy metals in the sediment in these regions were studied.Based on the non-dimension analysis,A multi-factor equation of accumulating and dispersing pattern of heavy metals was got,and the value of parameter a,b and correlation coefficient r was got by means of L S M.Correlation coefficients(r) are follows: r Zn=0.82;r Cu=0.91;r Pb=0.90;r Cd=0.89;r Hg=0.80;r Cr=0.87.