Grain Size Composition of Neopleistocene Basal Moraines in the Northeasternmost Area of the Russian Plain

IF 0.7 4区 地球科学 Q4 GEOCHEMISTRY & GEOPHYSICS Lithology and Mineral Resources Pub Date : 2023-11-14 DOI:10.1134/S002449022370030X
L. N. Andreicheva
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Abstract

Generalization of the grain size analyses of the basal Neopleistocene moraines from the sections of coastal outcrops and boreholes in the vast European Subarctic region of Russia and in more southern areas of the Timan–Pechora–Vychegda region showed that the moraines are typical mixed, almost unsorted rocks with similar contents of the gravel–sand, silt, and clay fractions, serving as one of the arguments in favor of their glacial genesis. Their grain size composition is related to the peculiarities of rocks in the glacier bed. It is formed during the crushing, abrasion, and mixing of the glacier-rafted, assimilated, and transported material during its transportation and deposition, which determines variability of the grain size composition of moraines. Consequently, the grain size composition of moraines in combination with other lithological data reflects the pathway and dynamics of the glacier movement.

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俄罗斯平原最东北部新更新世基底冰碛的粒度组成
从俄罗斯广阔的欧洲亚北极地区和蒂曼-佩霍拉-维切格达地区更南部地区的沿海露头剖面和钻孔中对基底新更新世冰碛石的粒度分析的概括表明,这些冰碛石是典型的混合岩石,几乎没有分选,砾石-砂、淤泥和粘土组分的含量相似,这是支持其冰川成因的论据之一。它们的粒度组成与冰川床中岩石的特性有关。它是在冰川漂流、同化和搬运的物质在搬运和沉积过程中破碎、磨蚀和混合形成的,这决定了冰碛石粒度组成的可变性。因此,冰碛石粒度组成结合其他岩性资料反映了冰川运动的路径和动力学。
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来源期刊
Lithology and Mineral Resources
Lithology and Mineral Resources 地学-地球化学与地球物理
CiteScore
1.30
自引率
37.50%
发文量
29
审稿时长
>12 weeks
期刊介绍: Lithology and Mineral Resources is an international peer reviewed journal that publishes articles on a wide range of problems related to the formation of sedimentary rocks and ores. Special attention is given to comparison of ancient sedimentary rock and ore formation with present-day processes. The major part of the journal is devoted to comparative analysis of sedimentary processes on the continents and in oceans, as well as the genetic aspects of the formation of sedimentary and hydrothermal–sedimentary mineral resources. The journal welcomes manuscripts from all countries in the English or Russian language.
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