南黄海表层沉积物黏土矿物分布及物源

DISTRIBUTION PATTERN OF CLAY MINERALS IN SURFACE SEDIMENTS OF SOUTH YELLOW SEA AND THEIR PROVENANCE

通过对南黄海表层沉积物295个站位的黏土矿物含量分析,研究了南黄海表层沉积物黏土矿物的组合特征、分布规律及与物质来源的关系。南黄海表层沉积物中伊利石含量最高,蒙脱石和高岭石含量次之,绿泥石含量最低;黏土矿物的组合类型以伊利石-蒙脱石-高岭石-绿泥石型为主,伊利石-高岭石-蒙脱石-绿泥石型次之;南黄海表层沉积物黏土矿物主要为陆源成因,物质主要来源于黄河和长江的供给。现代黄河物质及老黄河物质主要沉积于南黄海的西部和中部;长江物质主要在南黄海的西南和中北部区域沉积,东部物质反映来自朝鲜半岛的物质对南黄海东部的作用。

The clay minerals composition of the surface sediments in the South Yellow Sea from 295 stations were studied with focus on clay assemblages and their distribution pattern as well as provenance.The research results show that illite dominates in surface sediments of the South Yellow Sea with smectite or kaolinite as the second and chlorite the lowest.The assemblage of illite-smectite-kaolinete-chlorite is the main type of the clay minerals assemblage in the area,followed by the illite-kaolinete-smectite-chlorite assemblage.Clay minerals are mainly from the Yellow River and Yangtze River.Materials from both the recent and the ancient Yellow River deposited mainly in the western,middle part of the South Yellow Sea,while the substance from the Yangtze River deposited mainly in the southwestern and southern parts.In the eastern part of the study area,an influence of the material from the Korean peninsula was observed.