本文依据东海陆架北部 2 3个表层沉积物样品的粒度分析资料 ,就东海陆架北部表层细粒级沉积物的级配及意义进行了研究。结果表明 ,研究区表层沉积物中细粒级部分以 <0 .0 16 mm为优势粒级 ,可占到总细粒级沉积物的 75 %以上。济州岛西南泥质区以细于 0 .0 0 8mm粒级的沉积物占据优势 ,长江口泥质区则以 <0 .0 16 mm粒级的沉积物为主 ,两泥质区细粒级沉积物的级配很不相同 Based on the data of particle size analysis of 23 surface sediment samples in the northern East China Sea Shelf, the grading and significance of the fine grained sediments in the northern East China Sea shelf are studied. The results show that the fraction of fine-grained sediments in the study area is dominated by <0.016 mm, accounting for more than 75% of the total fine-grained sediments. The sediments in the southwestern part of Jeju island are dominated by the sediments with a grain size of 0.080 mm, while the sediments in the Changjiang estuary are dominated by <0. Sediment grading is very different