【摘要】 末次间冰期高海面时期（７５～１２８ｋａＢ．Ｐ．），在南黄海ＱＣ２孔发现了介形类化石群中“环北极种”为其优势种，组合中数量最多的是Ｓａｒｓｉｃｙｔｈｅｒｉｄｅａｂｒａｄｉ，其现代分布范围在我国浅海区十分狭窄，集中在北黄海冷水团控制区，冷水种在整个间冰期化石组合中占７９％以上；有孔虫组合在７０％以上的沉积层段中其优势种和主要成分以凉水种和喜凉种为主，如Ｂｕｃｃｅｌａｆｒｉｇｉｄａ，Ｐｒｏｔｅｌｐｈｉｄｉｕｍｔｕｂｅｒｃｕｌａｔｕｍ，Ｎｏｎｉｏｎｅｌａｓｔｅｌａ，Ｅｌｐｈｉｄｉｕｍｍａｇｅｌａｎｉｃｕｍ等，它们是北黄海现代有孔虫组合中的主要成分，Ｂｕｃｃｅｌａｆｒｉｇｉｄａ含量超过１０％的分布范围亦仅限于北黄海地区。现代北黄海冷水团中心底层水夏季多年平均温度仅５．８１℃，据此可推测末次间冰期南黄海存在着稳定的冷水团，其中心位于３４°１８′Ｎ，１２２°１０′Ｅ，较现代冷水团偏西南约１５０ｋｍ。在这个古冷水团中心，由于黄海环流的轴辐聚效应，形成了厚达１７ｍ的连续的浅海相“涡旋泥质沉积层”，与现代冷水团中心的“涡旋泥质沉积”相似。更多还原

【Abstract】 In hole QC2 of the South Yellow Sea,circumpolar species are found dominant in ostracoda fossils at the high sealevel period (128ka～75ka B.P.).Cold water species make up over 79% of fossil assemblages in the sedimentary layers.The dominant species and main compositions of foraminifera assemblages are mainly cool water and psychrophilic species such as Buccella frigida,Protelphidium tuberculatum,Nonionella stella and Elphidium magellanicum,which are the main compositions of modern foraminifera assemblages in the North Yellow Sea.Sarsicytheridea bradii  makes up the majority of ostracoda assemblages and now is only narrowly limited in Chinas shallow sea areas where cold water mass of the North Yellow Sea is playing a major role.And assemblages with Buccella frigida  making up more than 10% are also distributed in the North Yellow Sea area.Modern secular average temperature for the central bottom water of the cold water mass in summer is only 581℃ in the North Yellow Sea,indicating that there was a stable cold water mass in the South Yellow Sea during the Last Interglacial,and the center of the cold water mass was located at 34°18′N,122°10′E,about 150km southwest of that of the modern cold water mass.At the center of the cold water mass were formed 17 mthick eddy mud sediments of continuous neritic facies,similar to the eddy mud sediments at the center of the modern cold water mass.更多还原