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对山东半岛东北部滨浅海区306个海底表层样品进行了稀土元素含量和粒度测试,从稀土元素的角度出发,探讨了研究区表层沉积物的稀土元素地球化学特征及其物质来源。结果表明,表层沉积物中稀土元素总量的分布与沉积物类型有良好的对应性。高值区呈舌状由西北向东南伸展,正好对应粉砂类型区;而低值区则对应于砂质粉砂和粉砂质砂,说明了本研究区稀土元素分布基本遵循“元素粒度控制规律”。研究区沉积物的稀土元素球粒陨石标准化和上陆壳标准化配分模式与黄河沉积物非常接近;基于若干稳定元素比值的计算对比,验证了研究区沉积物与黄河入海沉积物具有相同的物源区。
The REE content and grain size of 306 seafloor surface samples in the shallow coastal area of northeastern Shandong Peninsula were studied. The REE geochemical characteristics and source of the surface sediments in the study area were discussed from the viewpoint of REE. The results show that the distribution of the total amount of rare earth elements in the surface sediments has a good correspondence with the sediment types. The high value area is tongue-like extending from northwest to southeast, corresponding to the silt type area, while the low value area corresponds to the sandy silt and silty sand, indicating that the distribution of rare earth elements in this study basically follow the “elemental grain size control law”. The standardization of rare earth element chondrite and the normalized distribution pattern of the upper continental shelf in sediments of the study area are very close to that of the Yellow River sediment. Based on the comparison and calculation of the ratios of some stable elements, it is verified that the sediments in the study area have the same provenance Area.