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对取自长江下游河道和黄河的沉积物样品进行了稀土元素分析,并搜集了文献资料中长江和黄河沉积物样品的稀土元素数据,发现在δEuN-ΣREEs关系图中长江和黄河沉积物之间有一条明显的分界线,回归分析表明该分界线是一个3次多项式方程,在该界线的上方是长江沉积物,下方是黄河沉积物.为了考察该分界线的合理性及其应用价值,在长江口和黄河口分别取样进行稀土元素分析,并搜集了来源于长江255孔和源于黄河的YA01孔沉积物的稀土元素数据.在δEuN-ΣREEs关系图中,长江口和255孔沉积物绝大部分分布在长江沉积物的区域,而黄河口和YA01孔沉积物绝大部分分布在黄河沉积物的区域.因此,通过δEuN-ΣREEs关系图和回归曲线方程,可以直观、定量地区分长江和黄河沉积物,并可用于中国东部边缘海沉积物源的定量识别.δEuN-ΣREEs是长江和黄河沉积物的源区气候条件和物质组成差异的综合体现,在沉积物由源区进入河流,再由河流进入海洋的过程中,δEuN-ΣREEs关系基本保持不变,使得其最初的物源和气候信息得以保存,并继承下来.
REE analysis of sediment samples taken from the lower reaches of the Yangtze River and the Yellow River collected rare earth element data from sedimentary samples from the Yangtze River and the Yellow River in the literature and found that between the Yangtze and Yellow River sediments in the δEuN-ΣREEs There is a clear dividing line, the regression analysis shows that the dividing line is a cubic polynomial equation above the boundary is the Yangtze River sediment, the bottom is the Yellow River sediment.In order to investigate the rationality of the dividing line and its value in the REE samples were collected from the Changjiang Estuary and the Yellow River Estuary, respectively, and REE data of 255 sediments from the Yangtze River and YA01 from the Yellow River were collected. In the δEuN-ΣREEs plot, Most of which are distributed in the sediments of the Yangtze River, while most of the sediments in the Yellow River Estuary and YA01 are distributed in the sediments of the Yellow River. Therefore, the δEuN-ΣREEs and regression curve equations can be used to distinguish the Yangtze River from the Yangtze River Yellow River sediments and can be used for quantitative identification of sedimentary sources in the marginal seas of eastern China.δEuN-ΣREEs is the source region climatic conditions and materials of sediments in the Yangtze River and the Yellow River The compositional difference reflects the fact that the δEuN-ΣREEs relationship remains unchanged after the sediment enters the river from the source area and then enters the sea, which makes the original source and climate information preserved and inherited.