Abstract

Строение верхней части криолитозоны и рельеф северо-востока Западной Сибири обусловлены изменением природной обстановки в позднем неоплейстоцене и голоцене. В 2016–2021 гг. изучены разрезы отложений на разных элементах рельефа III озерно-аллювиальной равнины Пур-Тазовского междуречья – увалах и термокарстово-эрозионных ложбинах. В строении верхней части равнины выделены каргинско-сартанские аллювиальные, озерные, склоновые отложения и голоценовые торфяники. На основе стратиграфии и новых геохронологических данных на Пур-Тазовском междуречье выявлены последствия активизации неотектонических процессов в сартанский период и влияния климатических факторов на дифференциацию аккумулятивных и денудационных процессов в голоцене. The structure of the upper part of permafrost and the topographic features in the northeast of Western Siberia were shaped by changes in the natural environment in the Late Pleistocene and Holocene. In 2016–2021, sections of different landforms – ridges and thermokarst-erosional hollows – were studied within the third lacustrine-alluvial plain of the Pur–Taz interfluve. The upper part of the plain includes the Kargin–Sartan alluvial, lacustrine, and slope sediments and Holocene peatlands. Based on the stratigraphy and new geochronological data on the Pur–Taz interfluve, the consequences of the activation of neotectonic processes in the Sartan period and the influence of climatic factors on the differentiation of accumulative and denudation processes in the Holocene were identified.

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