南黄海NT2孔沉积物物源研究

用等离子体质谱法(ICP—MS)对苏北岸外南黄海陆架区NT2孔72个沉积物样品的稀土元素(REE)进行了分析，研究了中更新世中、晚期以来苏北岸外南黄海陆架区沉积物物源的变化。相关分析揭示NT2孔粒度和化学风化对REE组成影响较小。判别函数和稀土元素配分模式表明南黄海NT2孔沉积物物源主要为长江源和黄河源。 REE判别图解揭示NT2孔上部0~5.50 m和5.50~19.30 m沉积物以长江源为主，中部19.30~27.00 m沉积物以黄河源为主，27.00~54.60 m沉积物以长江源为主，下部54.60~70.31 m沉积物以黄河源为主。研究表明黄河在中更新世中晚期已开始对南黄海陆架沉积作用有明显影响，而长江从晚更新世早期到现代对南黄海陆架起着主要作用。

Provenance Study of Sediments in Core NT2 of the South Yellow Sea

The rare earth elements(REE) of 72 sediment samples taken from Core NT2 in the South Yellow Sea near Jiangsu coast were measured with ICP-MS in order to study the variation of sediment source since the middle-late period of middle Pleistocene.The correlation plot indicates that the REE composition was less influenced by sediment grain size and chemical weathering,therefore,was primarily controlled by provenance rocks.The discrimination plot of REE parameter suggests that provenance of sediment in this core ...