Distribution of rare earth elements of granitic regolith under the influence of climate

• Published in: Acta geochimica Vol. 36; no. 3; pp. 440 - 445
• Main Authors: Mao, Hairuo, Liu, Congqiang, Zhao, Zhiqi, Yang, Junxiong
• Format: Journal Article
• Language: English
• Published: Heidelberg Science Press 01-09-2017; Springer Nature B.V
• Subjects: Anomalies; Climate; Coprecipitation; Distribution; Earth; Earth and Environmental Science; Earth Sciences; Enrichment; Fractionation; Geochemistry; Islands; Manganese; Minerals; Organic matter; Original Article; Oxidation; Oxides; Oxidoreductions; Profiles; Rare earth elements; REEs; Regolith; Rocks; Soil; Stone; Trace elements; 异常反映; 文件显示; 气候影响; 稀土元素分布; 稀土富集; 花岗岩风化壳; 铁锰氧化物; China; Inner Mongolia China; Weathering; Granitic regolith; Ce anomaly; Eu anomaly; Rare earth elements
• ISSN: 2096-0956; 2365-7499
• DOI: 10.1007/s11631-017-0186-y

The distribution and anomalies of rare earth elements（REEs） of granitic regolith were studied in Inner Mongolia and Hainan Island, China. One profile showed slight REE enrichment of an upper layer and no obvious light REE/heavy REE（LREE/HREE） fractionation（LaN/YbN of 0.9）. The second profile was significantly enriched in REEs and enriched in LREEs in the upper portion（LaN/YbN〉1.8）. Eu, Ce, and Gd anomalies of the two profiles are different. Slightly negative Eu, Ce, and Gd anomalies in NMG-3-1 indicate slow dissolution of primary minerals and little secondary products; in contrast, a positive Eu anomaly in HN-2 suggests the vegetation cycle may contribute to soil. The Ce anomaly of HN-2 reflects oxidation of Ce and coprecipitation by Fe-and Mn-oxides and organic matter. Correlation between Ce and Gd anomalies in HN-2 suggests Ce and Gd are both influenced by redoxreduction.