V. D. Strakhovenko, E. A. Ovdina, G. I. Malov, V. I. Malov
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引用次数: 0
Abstract
The contemporary scientific investigations delves into the mechanisms of migration, distribution, and fractionation of rare earth elements and yttrium (REE + Y) in aqueous environments characterized by humid and arid sedimentogenesis. This particular facet has been employed to solve numerous fundamental inquiries pertaining to lithology and paleolimnology. The manner in which REE + Y behave in water bodies within the cryolithozone remains largely unexplored. By evaluating the concentration levels and distribution patterns of REE + Y in the waters and sediments of the lakes situated in the Ukok Plateau and the Ulagan depression, under the prevailing conditions of cryolithogenesis as the primary geochemical process transforming rocks, soils, and sediments, we were able to augment the existing comprehension of nival sedimentation. In all the lakes examined, the content of REE + Y in the water exhibits a similar magnitude as that of small lakes in other landscape zones of the southern Western Siberia, while the content level of REE + Y is greater in the bottom sediments. The concentrations, distribution and fractionation of REE + Y vary from lake to lake and are determined by several factors: the chemical properties of REE + Y in solutions, the intensity of transformation of host rocks and the mineral forms of the REE + Y in the rocks (minerals). The concentrations, distribution and fractionation of REE + Y in bottom sediments vary slightly from lake to lake except for the contents of Eu, Y, La. The content of Eu, Y, La in the bottom sediment of the lake is influenced by a combination of factors, including their concentrations in the water, the redox conditions of diagenesis, and the mineral composition of the bottom sediment, particularly the amount of accessory minerals.
摘要当代科学研究深入探讨了稀土元素和钇（REE + Y）在以潮湿和干旱沉积为特征的水环境中的迁移、分布和分馏机制。这一特殊方面已被用于解决与岩石学和古气候学有关的许多基本问题。REE + Y 在冰冻带水体中的行为方式在很大程度上仍未得到探索。通过评估位于乌科克高原和乌拉干洼地的湖泊水体和沉积物中 REE + Y 的浓度水平和分布模式，我们能够在低温成岩作用（岩石、土壤和沉积物的主要地球化学过程）普遍存在的条件下，加深对新沉积作用的理解。在所有考察的湖泊中，水中的 REE + Y 含量与西西伯利亚南部其他地貌区的小湖泊相似，而底部沉积物中的 REE + Y 含量更高。REE + Y 的浓度、分布和分馏因湖而异，并由以下几个因素决定：溶液中 REE + Y 的化学特性、寄主岩石的转化强度以及岩石（矿物）中 REE + Y 的矿物形态。除 Eu、Y、La 的含量外，底层沉积物中 REE + Y 的浓度、分布和分馏在不同湖泊中略有不同。湖底沉积物中 Eu、Y、La 的含量受多种因素的影响，包括它们在水中的浓度、成岩过程中的氧化还原条件以及底层沉积物的矿物组成，尤其是附属矿物的含量。
期刊介绍：
Geochemistry International is a peer reviewed journal that publishes articles on cosmochemistry; geochemistry of magmatic, metamorphic, hydrothermal, and sedimentary processes; isotope geochemistry; organic geochemistry; applied geochemistry; and chemistry of the environment. Geochemistry International provides readers with a unique opportunity to refine their understanding of the geology of the vast territory of the Eurasian continent. The journal welcomes manuscripts from all countries in the English or Russian language.
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