Abstract

The total content of rare earth elements (REEs) and the content of their oxalate-soluble fraction were studied in four soil profiles (Gleyic Umbrisols, Albic Gleyic Folic Retisols (Raptic), Dystric Albic Retisol) of the Central Forest Nature Reserve. The REE content was normalized to a local standard (the Russian Platform clay), and the cerium and europium anomalies were quantified [8]. In addition to the initial redistribution of REEs during the formation of rocks, REEs in the studied soils undergo geochemical fractionation, which results in the depletion of soil horizons of heavy lanthanides and europium. The negative europium anomaly is maximal in eluvial horizons and is weaker or absent in organic horizons. The oxalate-soluble REE fraction affects the redistribution of heavy lanthanides and cerium in the studied soils, and also results in the development of a positive cerium anomaly in some horizons.

中文翻译：

---

中央森林国家自然生物圈保护区土壤中的稀土元素

摘要

在中央森林自然保护区的四种土壤剖面（Gleyic Umbrisols、Albic Gleyic Folic Retisols (Raptic)、Dystric Albic Retisol）中研究了稀土元素 (REEs) 的总含量及其草酸盐可溶部分的含量。将 REE 含量标准化为当地标准（俄罗斯平台粘土），并对铈和铕异常进行量化 [8]。除了在岩石形成过程中 REE 的初始再分布外，研究土壤中的 REE 还经历地球化学分馏，导致重镧系元素和铕的土壤层耗尽。铕负异常在可溶层中最大，在有机层中较弱或不存在。草酸盐可溶性稀土元素会影响研究土壤中重镧系元素和铈的重新分布，