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东太平洋CC区深海泥具有高的REY(REE+Y)含量,理解其富集机制对于寻找深海稀土资源具有重要意义。本文对WPC1101站位的沉积物柱状样开展了沉积物类型、粒度、黏土矿物和元素组成分析,结合已有资料探讨研究区深海泥的稀土元素富集特征及其形成机制。研究区深海泥主要以远洋黏土和硅质生物组分为主,其∑REY范围主要为400~1 000μg/g。深海泥北美页岩标准化后的REY配分模式具有显著的负Ce异常,指示富稀土深海泥中海相自生组分贡献较大。根据统计发现,研究区深海泥的∑REY与Al2O3、MnO、P2O5均具有良好的相关性,黏土组分、铁锰氧化物和磷酸盐对REY都有贡献。通过综合分析,提出研究区富稀土泥中高P含量是高∑REY重要的控制因素。
Deep sea mud in the CCC of the eastern Pacific has a high content of REE (REE + Y), and understanding its enrichment mechanism is of great significance for finding deep-sea rare earth resources. In this paper, sediment types, grain size, clay minerals and elemental compositions of sediment samples from station WPC1101 were analyzed. Based on the available data, the characteristics of rare earth elements enrichment in deep-sea mud and their formation mechanism were discussed. The deep-sea mud in the study area is dominated by marine clay and siliceous biomasses, with a ΣREY range of 400-1000 μg / g. REY partitioning model after standardization of deep-sea mud North American shale has a significant negative Ce anomaly, which indicates that the marine spontaneous component of rich-deep sea mud contributes more. According to the statistics, ΣREY of deep-sea mud in the study area has good correlation with Al2O3, MnO and P2O5. Clay component, Fe-Mn oxide and phosphate contribute to REY. Through comprehensive analysis, it is proposed that the high P content in the rare earths in the study area is an important control factor for the high-REEY.