Carbonate Soil Cryogenesis in South Yakutia (Russia)
The present study investigates changes occurring in the material composition and properties of the South Yakutian carbonate soils during cryogenesis. The nature of the transformations of certain limestone varieties composing the surfaces of rock massifs was determined using scanning electron microsc...
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ftmdpi:oai:mdpi.com:/2075-163X/11/8/800/ 2023-08-20T04:10:20+02:00 Carbonate Soil Cryogenesis in South Yakutia (Russia) Andrey Melnikov Anna Kut Ze Zhang Viktor Rochev agris 2021-07-23 application/pdf https://doi.org/10.3390/min11080800 EN eng Multidisciplinary Digital Publishing Institute Crystallography and Physical Chemistry of Minerals & Nanominerals https://dx.doi.org/10.3390/min11080800 https://creativecommons.org/licenses/by/4.0/ Minerals; Volume 11; Issue 8; Pages: 800 limestone cryogenesis matter alteration South Yakutia Text 2021 ftmdpi https://doi.org/10.3390/min11080800 2023-08-01T02:15:19Z The present study investigates changes occurring in the material composition and properties of the South Yakutian carbonate soils during cryogenesis. The nature of the transformations of certain limestone varieties composing the surfaces of rock massifs was determined using scanning electron microscopy, 3D X-ray tomography, as well as lithological–mineralogical and optical–petrographic studies, over a 10-year period. The areas in carbonate rock massifs with increased clay content, pyritisation, dolomitisation, and baritisation, as well as zones of calcite and dolomite junction, were found to be least resistant to the effects of processes associated with water phase transitions, i.e., freezing and thawing. The mineral proportion of limestone on the surface of soil massifs chemically processed over a 10-year period reached 5–7% of the volume of the weathered rocks. In the process of transformation, not only the composition of the rocks changed, but also the nature of the structural bonds that significantly influence their mechanical strength properties. The number of cracks for weathered soil samples increased by 9–16%; their opening increased by 13–18%. For rocks initially having uniaxial compression strength in the range of 33–46 MPa, this strength was reduced by 19–27%. Laboratory experiments on 1000-fold cyclic freezing and thawing of carbonate rock samples (which corresponds to an 8–10-year period of weathering on the surface of a mountain outcrop under the natural conditions of South Yakutia) demonstrate the similarity of these changes with those observed in samples taken from the sides of open pits 10 years ago. In general, soils are influenced by a wide range of environmental factors under natural conditions. The significant influence of alternating temperatures on the changes in the composition and structure of limestones in South Yakutia is characterised in detail. Text Yakutia MDPI Open Access Publishing Minerals 11 8 800 |
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English |
topic |
limestone cryogenesis matter alteration South Yakutia |
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limestone cryogenesis matter alteration South Yakutia Andrey Melnikov Anna Kut Ze Zhang Viktor Rochev Carbonate Soil Cryogenesis in South Yakutia (Russia) |
topic_facet |
limestone cryogenesis matter alteration South Yakutia |
description |
The present study investigates changes occurring in the material composition and properties of the South Yakutian carbonate soils during cryogenesis. The nature of the transformations of certain limestone varieties composing the surfaces of rock massifs was determined using scanning electron microscopy, 3D X-ray tomography, as well as lithological–mineralogical and optical–petrographic studies, over a 10-year period. The areas in carbonate rock massifs with increased clay content, pyritisation, dolomitisation, and baritisation, as well as zones of calcite and dolomite junction, were found to be least resistant to the effects of processes associated with water phase transitions, i.e., freezing and thawing. The mineral proportion of limestone on the surface of soil massifs chemically processed over a 10-year period reached 5–7% of the volume of the weathered rocks. In the process of transformation, not only the composition of the rocks changed, but also the nature of the structural bonds that significantly influence their mechanical strength properties. The number of cracks for weathered soil samples increased by 9–16%; their opening increased by 13–18%. For rocks initially having uniaxial compression strength in the range of 33–46 MPa, this strength was reduced by 19–27%. Laboratory experiments on 1000-fold cyclic freezing and thawing of carbonate rock samples (which corresponds to an 8–10-year period of weathering on the surface of a mountain outcrop under the natural conditions of South Yakutia) demonstrate the similarity of these changes with those observed in samples taken from the sides of open pits 10 years ago. In general, soils are influenced by a wide range of environmental factors under natural conditions. The significant influence of alternating temperatures on the changes in the composition and structure of limestones in South Yakutia is characterised in detail. |
format |
Text |
author |
Andrey Melnikov Anna Kut Ze Zhang Viktor Rochev |
author_facet |
Andrey Melnikov Anna Kut Ze Zhang Viktor Rochev |
author_sort |
Andrey Melnikov |
title |
Carbonate Soil Cryogenesis in South Yakutia (Russia) |
title_short |
Carbonate Soil Cryogenesis in South Yakutia (Russia) |
title_full |
Carbonate Soil Cryogenesis in South Yakutia (Russia) |
title_fullStr |
Carbonate Soil Cryogenesis in South Yakutia (Russia) |
title_full_unstemmed |
Carbonate Soil Cryogenesis in South Yakutia (Russia) |
title_sort |
carbonate soil cryogenesis in south yakutia (russia) |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2021 |
url |
https://doi.org/10.3390/min11080800 |
op_coverage |
agris |
genre |
Yakutia |
genre_facet |
Yakutia |
op_source |
Minerals; Volume 11; Issue 8; Pages: 800 |
op_relation |
Crystallography and Physical Chemistry of Minerals & Nanominerals https://dx.doi.org/10.3390/min11080800 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/min11080800 |
container_title |
Minerals |
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11 |
container_issue |
8 |
container_start_page |
800 |
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