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经分析,长江中下游地区第四纪红土中铁锰结核中以Si、Fe、Al、Mn等元素为主,其中,Fe、Mn、Pb和Cd大量富集,稀土元素为强烈富集,其中Ce表现出强烈的正异常.根据结核的元素富集特征及铁锰的地球化学特征推测,长江中下游地区第四纪红土中结核形成过程经历了较强烈的干湿环境变化过程.
According to the analysis, elements such as Si, Fe, Al, Mn and other elements are dominant in the Quaternary laterites in the middle and lower reaches of the Yangtze River. Among them, Fe, Mn, Pb and Cd are abundantly enriched and rare earth elements are strongly enriched. Among them, Ce Showing a strong positive anomaly.According to the element enrichment characteristics of nodules and the geochemical characteristics of iron and manganese, it is inferred that the formation of nodules in the Quaternary laterites in the middle and lower reaches of the Yangtze River experienced a relatively strong process of change in the wet and dry environment.