Abstract

Coastal lowlands of northeastern Siberia are composed of the Pleistocene ice-rich organic-containing loamy sediments of the Ice Complex (yedoma) and products of their transformation in the Holocene. In the tundra zone, three major trends of modern pedogenesis depending on the geomorphic position and age of particular landforms have been identified. On the interfluves affected by thermokarst processes in the Holocene, somewhat elevated remains of the Late Pleistocene Ice Complex alternate with vast thermokarst depressions (alases) with lakes. Cryozems are developed in automorphic plain positions and on the upper parts of slopes. The profiles of these soils are strongly affected by cycles of frost boiling and cryoturbation; under their influence, specific suprapermafrost accumulative organomineral horizons are formed. Gleyzation predominates in the soils of the low- and middle-level Holocene terraces of alases. Peat accumulation is progressively developed in the bottoms of alas depressions.

中文翻译：

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西伯利亚东北部沿海低地苔原带的成岩作用

摘要

西伯利亚东北部的沿海低地是由更新世的含冰复合物（yedoma）富含冰的有机质壤土沉积物及其在全新世转变的产物组成。在苔原带，已经确定了现代成岩作用的三个主要趋势，这取决于地貌的位置和特定地貌的年龄。在全新世受热岩溶过程影响的交汇处，晚更新世冰体的残留物有些升高，而湖泊则有巨大的热岩溶洼地（阿拉斯）。低温蠕虫在自体平原位置和斜坡上部发育。这些土壤的剖面受霜冻沸腾和低温扰动的循环的强烈影响；在他们的影响下，形成了特定的超生冰霜累积的有机矿层。在las的低层和中层全新世阶地的土壤中，交叠起主要作用。泥炭堆积在阿拉斯凹陷的底部逐渐发展。