CAJ | 학술논문

松辽平原东部受第四纪差异性构造活动影响，形成特殊的更新世沉积地层。由于第四纪划分方案和地域差异，松辽平原东部中、晚更新世界限仍处于不确定状态。通过黑龙江省方正剖面的研究、中更新统顶部（149．6±10．4）ka 光释光年龄和主要氧化物、微量元素、稀土元素分析以及区域剖面对比，认为将松辽盆地东缘中、晚更新世的界限年龄置于140 ka 更适合地层实际情况。中更新世地层以河湖相、河流相和洪积相沉积物为主，完整的晚更新世地层应该包括下部的沼泽漫滩相黏土、亚黏土和上部亚砂土、黄土沉积。黑龙江省荒山剖面哈尔滨组下部可能由于相变而缺少沼泽漫滩相的沉积物。方正剖面与榆树东岗组剖面地层可以对比。中、晚更新世沉积环境发生了明显变化，主要氧化物、微量元素和稀土元素含量在中、晚更新世的地层界限处都发生了明显的突变。
송료평원동부수제사기차이성구조활동영향，형성특수적경신세침적지층。유우제사기화분방안화지역차이，송료평원동부중、만경신세계한잉처우불학정상태。통과흑룡강성방정부면적연구、중경신통정부（149．6±10．4）ka 광석광년령화주요양화물、미량원소、희토원소분석이급구역부면대비，인위장송료분지동연중、만경신세적계한년령치우140 ka 경괄합지층실제정황。중경신세지층이하호상、하류상화홍적상침적물위주，완정적만경신세지층응해포괄하부적소택만탄상점토、아점토화상부아사토、황토침적。흑룡강성황산부면합이빈조하부가능유우상변이결소소택만탄상적침적물。방정부면여유수동강조부면지층가이대비。중、만경신세침적배경발생료명현변화，주요양화물、미량원소화희토원소함량재중、만경신세적지층계한처도발생료명현적돌변。
The special Pleistocene strata were formed by the differential tectonic activities in Eastern Songliao Plain during the Quaternary period.Due to the difference of Quaternary strata division and the differential strata in different regions,the stratigraphic boundary between Middle and Upper Pleistocene series was not determined in Eastern Songliao Plain. Studies of the Fangzheng strata profile in Heilongjiang Province,the age of (149.6±10.4)ka by optically simulated luminescenc,the analysis of main elements,trace elements,REE as well as the correlation of strata profiles indicate that taking 140 ka as the stratigraphic boundary between Middle and Upper Pleistocene series is suitable for the strata reality situation.The Middle Pleistocene strata are composed of the sediments of stream,lake and flood facies.Late Pleistocene strata are dominated by the lower part of the limnetic and floodfacies clay and upper part of loess.The limnetic and flood facies clay may be lack in the strata profiles of the Huangshan Formation because of the facies transformation.The Fangzheng strata profile can correlate with the Donggang profile in Yushu County.The depositional environment changed obviously in middle and Late Pleistocene.Contents of main elements,trace elements,REE appeared prominent changes between Middle and Upper Pleistocene series.