【摘要】 楚科奇海及邻近的北冰洋深水区表层沉积物中粘土矿物的分布受源区母岩和海区环流结构所制约。来自加拿大马更些河的物质富含高岭石和伊利石,对研究区东北部和北部沉积物的影响较大;来自阿拉斯加西北部的河流和海岸带物质富含绿泥石,高岭石含量变化较大,对阿拉斯加西北部近海沉积物的影响明显;来自西伯利亚的物质富含绿泥石,对研究区西部沉积物的影响较为明显。自白令海峡进入的太平洋水携带富含蒙皂石的育空河物质横穿楚科奇海陆架向北扩散,导致楚科奇海中部沉积物中的蒙皂石含量高;同时,粘土矿物自身的粒度分异在某种程度上也促使蒙脱石在离岸距离较远的中部海区富集。更多还原

【Abstract】 The clay mineral distributions in sufrace sediments from the Chukchi Sea and adjacent arctic deep sea are controlled by the sediment source and marine circulation structure. The sediments in the northeastern and northern study area are affected greatly by the kaolinite- and illite-rich sediments from the Canadian Makenzie River, the offshore sediments along the northwest Alaska coast are affected significantly by the sediments from the northwest Alaska rivers and coast, which are rich in chlorite and have variable kaolinite contents, and the sediments in the western study area are affected significantly by the chlorite-rich Siberian materials. The Pacific water passing through the Bering Strait brings in the Yukon River materials rich in smectite to spread northward to result in the high content of smectite in the central Chukchi Sea sediments, and the differential sorting of clay minerals also promotes the enrichment of smectite in the central Chukchi Sea.更多还原