Extremely high uranium concentrations (>100 times average crustal content) are established in the recent sediments of small lakes of the northern Murmansk region. It is substantiated that the high uranium concentrations in the sediments of the lakes of the northern Murmansk region were mainly controlled by natural uranium migration from magmatic and metamorphic rocks bearing uranium mineralization (Litsa geological district). The sediments of the studied lakes display a tight correlation of uranium with Mo and rare earth elements usually accompanying uranium in parental rocks. The main chemical fractions of uranium in the lake sediments are revealed. It is shown that organic matter significantly affects the accumulation of this element in the lake sediments.

中文翻译：

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北极摩尔曼斯克地区北部近期湖泊沉积物中的铀异常

在摩尔曼斯克北部地区最近的小湖泊沉积物中建立了极高的铀浓度（> 平均地壳含量的 100 倍）。已经证实，摩尔曼斯克北部地区湖泊沉积物中的高铀浓度主要受来自含铀矿化岩（利察地质区）的岩浆变质岩的天然铀迁移控制。所研究湖泊的沉积物显示出铀与钼和稀土元素之间的密切相关性，这些元素通常伴随着母岩中的铀。揭示了湖泊沉积物中铀的主要化学成分。结果表明，有机质显着影响该元素在湖泊沉积物中的积累。