| In this paper, sediment particle size, major elements and rare earth elements of 73 samples were measured and analyzed based on the samples collected from 4 beach exploratory trenches from north to south in Rizhao City. The variation characteristics and provenance of geochemical elements in beach sediments in Rizhao City were systematically studied. According to the results, the beach sediments in Rizhao City were generally coarse, mainly coarse sand and medium sand, and the sediments presented the characteristics of fine-coarse-fine from north to south. The main major elements were SiO2, followed by Al2O3, K2O, Na2O and CaO, etc. The trace elements mainly were Ba, Sr and Zr. The rare earth elements showed obvious enrichment of light rare earth elements and deficit of heavy rare earth elements. And the standardized curve of chondrite of rare earth element showed a V-shaped curve with left high and right low. The range of Eu anomalies varied widely, from positive anomalies to negative anomalies, with no obvious Ce anomalies. Through the comparative analysis of rare earth elements in the sediments of the Yangtze River, the Yellow River and the surrounding small and medium-sized rivers entering the sea, it was found that the sediment provenance were complex, mainly were terrigenous matters, and were highly influenced by the Yellow River and the surrounding small and medium-sized rivers. |
