Abstract—

Data on major properties and clay mineralogy in the profiles of slightly differentiated Cryosols forming in cold ultracontinental climate of Yakutia are discussed. The particular objects are represented by the cryozems of tundra, forest-tundra, and northern taiga of the Anabar and Alazeya plateaus and by the palevaya (pale) soil of middle taiga in Central Yakutia. The differentiation of clay minerals in the vertical soil profiles is poorly pronounced because of the strong homogenizing impact of cryoturbation processes. The profile of pale soil displays minor differences in clay mineralogy despite the strong difference in acid–base conditions of the upper and lower horizons. However, the obtained data suggest that mineral weathering in pale soils of Central Yakutia is more advanced than it was concluded in the 1970s on the basis of data on the absence of pronounced trends in the vertical distribution of clay minerals in their profiles. This is in good agreement with the presence of a sufficiently thick upper humus horizon in these soils, which is typical of the soils of more humid regions. It is suggested that pale soils of Central Yakutia should be classified as soddy pale soils.

中文翻译：

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雅库特苔原和针叶林带的冰冻溶胶：性质、粘土矿物学和分类问题

摘要-

讨论了在雅库特寒冷的超大陆气候中形成的微分化冷冻溶胶剖面中的主要性质和粘土矿物学数据。特殊的物体以阿纳巴尔和阿拉泽亚高原的苔原、森林-苔原和北部针叶林的冻土以及雅库特中部针叶林中部的palevaya（苍白）土壤为代表。由于低温扰动过程的强烈均质化影响，垂直土壤剖面中粘土矿物的分化并不明显。尽管上层和下层的酸碱条件存在很大差异，但苍白土壤的剖面显示粘土矿物学的微小差异。然而，获得的数据表明，雅库特中部苍白土壤中的矿物风化比 1970 年代根据其剖面中粘土矿物垂直分布没有明显趋势的数据得出的结论更为先进。这与这些土壤中存在足够厚的上部腐殖质层非常吻合，这是较潮湿地区土壤的典型特征。建议将雅库特中部的苍白土壤归类为泥质苍白土壤。