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对北黄海中部DLC70-2孔166个沉积物样品进行了稀土元素测定,结合粒度参数研究,以探讨北黄海中部DLC70-2孔稀土元素地球化学特征和物质来源。结果表明:DLC70-2孔岩心稀土元素分布特征分别反映了末次间冰期(暖期)晚期以来北黄海海面波动以及沉积物物源的变化。判别函数和稀土元素配分模式表明北黄海DLC70-2孔沉积物物源主要为黄河源和鸭绿江源。La/Yb判别图解揭示DLC70-2孔上部0~32.10 m和下部37.60~60.72 m沉积物以黄河源为主,中部32.10~37.60 m和底部60.72~70.45 m沉积物以鸭绿江源为主。研究表明晚更新世以来黄河对北黄海中部沉积起着重要作用,而鸭绿江物质对北黄海中部沉积作用也有明显影响。
The REE measurements of 166 sediment samples from DLC70-2 in the central North Yellow Sea were carried out to study the geochemical characteristics and source of rare earth elements in DLC70-2 pores in the central North Yellow Sea. The results show that the distribution characteristics of REE in core DLC70-2 reflect the variation of the sea surface and the source of sediments in the northern Yellow Sea since the last interglacial (warm) period respectively. The discriminant function and REE patterns show that the sediment sources of the DLC70-2 pore in the northern Yellow Sea are mainly the Yellow River source and the Yalu River source. The La / Yb discrimination diagram reveals that the sediments from 0 to 32.10 m in the upper part of DLC70-2 and from 37.60 to 60.72 m in the lower part are dominated by the Yellow River source, with sediments from 32.10 to 37.60 m in the middle and from 60.72 to 70.45 m in the bottom. The study shows that since the late Pleistocene, the Yellow River plays an important role in the sedimentation of the central North Yellow Sea, while the Yalu River sediments have a significant impact on the sedimentation in the central North Yellow Sea.