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本文阐述了英国圣·奥斯托尔(Sr·Austell)和中国高岭二个风化高岭土矿床风化母岩的稀土配分特征:稀土总量低,一般TR仅50ppm;轻稀土略偏富集,δEu0.2～0.43;Eu/Sm<0.1;La/Yb值一般为5～7,(La/Yb)_N一般3～4;轻、重稀土元素在弱酸性水介质条件下经风化作用被分离。稀土配分特征的研究已成为现代成岩成矿作用研究不可分割的一部分,而与风化高岭土有关的花岗岩的稀土配分特征至今尚少报道。本文拟以两个高岭土矿床为例对风化高岭土型花岗岩的稀土配分特征作一分析。
This paper describes the characteristics of rare earth compounds in the weathered mother rocks of the two Austenitic and Kaolin weathered kaolinite deposits in the UK: low total RE, typically only 50 ppm TR; light rare earths slightly enriched and δEu0 .2 ~ 0.43; Eu / Sm <0.1; La / Yb value is generally 5 ~ 7, (La / Yb) _N is generally 3 ~ 4; light and heavy rare earth elements are weathered by weak acid aqueous medium conditions were isolated. The study on the characteristics of rare earth complex has become an integral part of the research on modern diagenesis and mineralization. The characteristics of rare earth complexes of granite with weathering kaolin have not yet been reported. In this paper, we take two kaolin deposits as an example to analyze the characteristics of rare earth compounding of weathered kaolin granite.