Сарыкульские палеопочвы отложений Миасского карьера (Южный Урал) с позиций палеопедологии

Translated title of the contribution: Sarykul paleosols of the Miass quarry (Southern Urals) from the standpoint of paleopedology

Ольга Анатольевна Некрасова, Мария Ивановна Дергачева, Антон Павлович Учаев, Наталья Леонидовна Бажина

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Abstract

"To study ancient soils is significant for reconstructing the retrospective trends of climate change. This essential problem requires the involvement of regional materials, synthesis of which will ultimately facilitate identification of natural and anthropogenic components of global climate change. The aim of our research was to show the uniqueness of the Southern Urals Sarykul paleosols from the standpoint of paleopedology for further placing them in the system of uneven-aged soils of the Urals. The objects of the study were paleosols in the Miass quarry, located in the Eastern foothills of the Southern Urals (55°04'38"N 60°07'47"E). Sarykul paleosols are morphologically similar, so only paleosols from two sections (2-013 and 9-014) were subject to analytical study. We studied basic physico-chemical characteristics as well as the composition, the ratio of humic substances and their spectral properties (See Tables). We obtained similar values of the medium reaction, the content of exchangeable bases with a predominance of calcium over magnesium and high content of the latter, as well as a relatively high content of amorphous iron in the considered soils. We did not reveal redistribution of clay fraction in the soil profile. Humus horizons of the paleosols are close in magnetic susceptibility - one of the soil integral indicators. The non-parallel change in the magnetic susceptibility and the content of total organic carbon with the depth in both paleosols, the low carbonate content and even their absence in [B] horizons, and a relatively high content of amorphous iron allows us thinking that the soil passed the stage of relatively high humidity. Group humus composition of paleosol is characterized as typical for modern Chernozem soil: humic acids have the largest proportion of calcium humates and predominate over fulvic acids."
Translated title of the contributionSarykul paleosols of the Miass quarry (Southern Urals) from the standpoint of paleopedology
Original languageRussian
Pages (from-to)6-20
Number of pages15
JournalВестник Томского государственного университета. Биология
Issue number4(36)
DOIs
Publication statusPublished - 2016

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