南黄海西北部SYS-0803孔第四纪晚期底栖有孔虫群落特征及其古环境意义  

LATE QUATERNARY BENTHIC FORAMINIFERA OF CORE SYS-0803 FROM THE NORTHWESTERN SOUTH YELLOW SEA AND THEIR PALEOENVIROMENTAL SIGNIFICANCE

作　　者：王飞飞[1,2] 王红[2] 刘健[1,2] 宫少军[3,4] 

机构地区：[1]国土资源部海洋油气资源与环境地质重点实验室,青岛266071 [2]青岛海洋地质研究所,青岛266071 [3]天津华北地质勘查局地质研究所,天津300171 [4]天津市海洋地质勘查中心,天津300171

出　　处：《海洋地质与第四纪地质》2011年第4期113-123,共11页Marine Geology & Quaternary Geology

基　　金：国家自然科学基金项目(40876034);国土资源部地质调查项目(1212010611401)

摘　　要：SYS-0803孔取于南黄海西北部(35°02′N、121°45′E,水深49.00m),其60.30m长的柱状样记录了约140ka以来的沉积环境演变。对248个样品中25个底栖有孔虫变量的Q型因子分析得到4个主因子,累计方差贡献为93.0%。通过底栖有孔虫组合分析,在140ka以来的沉积中共发现4个海相层和4个陆相层,其中MIS 6晚期海侵层(孔深53.06～50.28m)中以含典型暖水底栖有孔虫为特征,推测该时期可能存在有暖流;MIS 5e期高海面海相层(孔深33.76～30.55m)中的微体化石群以典型的冷水底栖有孔虫和介形虫占优势,推断当时的黄海与现代一样,发育有强盛的冷水团。在冰后期海侵层位中发现了以短期海退为特征的YD事件(孔深13.80～12.91m,12 460～11 572cal.aBP)。The Core SYS-0803 was taken from the northwestern South Yellow Sea（35°02′ N,121°45′ E,water depth 49.00 m,core length 60.30 m）,and it recorded the paleoenvironmental changes of the past ～140 ka.Q-mode factor analysis was carried out for 248 samples and 25 benthic foraminiferal species,and 4 varimax factors were selected,which account for more than 93.0% of the total variance.Based on the benthic foraminiferal assemblages,four marine and four terrestrial strata were recognized in this core.The late MIS 6 marine layer（depth 53.06~50.28 m） contains typical warm-water benthic foraminifera,implying the occurrence of a warm current.The MIS 5e（depth 33.76~30.55 m） marine layer was remarked by the abundant cold-water benthic foraminifera and ostracods,indicating the development of a strong cold-water mass similar to the modern Cold-water Mass of the Yellow Sea.A short regression（depth 13.80~12.91 m,12 460~11 572 cal.aBP）was found in the postglacial transgression layer,probably responding to the Younger Dryas event.

关 键 词：底栖有孔虫 因子分析 沉积环境 第四纪晚期 南黄海 

分 类 号：P736.2[天文地球—海洋地质]