海南岛小海潟湖沉积物的地球化学特征  

GEOCHEMICAL CHARACTERISTICS OF SEDIMENTS FROM XIAOHAI LAGOON, HAINAN ISLAND

作　　者：郭丽芬[1] 钟晋梁[1] 

机构地区：[1]中国科学院南海海洋研究所

出　　处：《热带海洋学报》1989年第3期27-35,共9页Journal of Tropical Oceanography

摘　　要：小海潟湖沉积物的大部分元素含量与花岗岩类的元素含量接近,沉积物的Ni,B,Sr的含量和Sr/Ba比值显示出陆源沉积物的特点。V,Mn,Co,Ni,Cu,Zn,Pb之间的相关系数为0.83—0.98,这些元素共同与有机质富集于沉积物的粉砂、粘土粒级之中。从潟湖边缘到中心,Cr/V,Cr/Ni,Cr/Cu比值从大变小,Ni/Co比值从小变大的规律变化可以指示物质从潟湖边缘迁移至潟湖中心。At Xiaohai Lagoon, located at the east coast of Hainan Island, most element contents in sand sediments are identical to those in granitic types. The sediments originated from granitic types of the lagoon's marginal area, and terrigenous detrital material was carried by the river. Water dynamic effects in the lagoon caused sorting of the sediments, and positive interrelation between most elements contents and silty clay contents in the sediments.The interrelated coefficient between V, Mn, Co, Ni, Cu, Zn and Pb was 0.83-0.98, and these elements were gathered in abundance together with organic matter into the silty clay of the Sediments. Contents of Ni, B and Sr, as well as ratio of Sr/Ba in the sediments of Xiaohai Lagoon displayed characteristics of terrigenous sediments. From the margin to the centre of the lagoon, ratio of Cr/V, Cr/Ni and Cr/Cu changed from large to small, and ratio between Ni/Co changed from small to large. Through these pattern changes in sediments, the migration of sediments from the margin to the centre of the lagoon might be explained.

关 键 词：沉积物样品 潟湖 花岗岩类 陆源沉积物 地球化学特征 指示物质 相关系数 表层沉积物 物质来源 湖水体 

分 类 号：P7[天文地球—海洋科学]