Генетические типы межморенных флювиальных отложений на севере Печорской низменности

Abstract

Quaternary deposits of the Far North attract the attention of researchers, starting from the first stages of the development of geological science. They are represented by a wide range of rocks, the genetic interpretation of which is not always unambiguous, which in some cases leads to the erroneousness of paleogeographic reconstructions. Understanding the lithogenesis processes in the polar zone conditions is necessary for the correct interpretation of the genesis of the Neo-Plei-stocene deposits, the restoration of the paleogeo-graphic conditions of their formation. It is im-portant to compare the lithological characteristics of the deposits in the northwest and northeast of the Bolshezemels-kaya tundra, since their formation is associated with different sources of material removal. A lithological study and facies-genetic dissection of fluvial sediments in the northwest and northeast of the Bolsheze-melskaya tundra were carried out. On the basis of the genetic diagram (the graph of the dependence of the average grain diameter (dcp) and the sorting coefficient (Sc)), it was found that alluvial, fluvioglacial, lacustrine and marine sediments were distinguished in the Kuya River basin, and alluvial, fluvioglacial and marine sediments – in the Padymeityvis River basin. The features of the identified genetic types of fluvial deposits are revealed based on the study of their textural characteristics, granulometric and mineral compositions.