Palaeoenvironmental and palaeoclimatic inferences based on X-ray computer tomography: a case study of alkaline lake deposits in Hungary
Widely distributed freshwater carbonate sediments, i.e., limestone, dolomitic limestone and dolomite, developed in inter-dune alkaline ponds of the Danube-Tisza Interfluve in the centre of the Carpathian Basin during the Holocene. The key parameters that determine the formation of any given type of...
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ftdoajarticles:oai:doaj.org/article:22b0ec3384254644a41d71bdcce76351 2023-06-18T03:42:05+02:00 Palaeoenvironmental and palaeoclimatic inferences based on X-ray computer tomography: a case study of alkaline lake deposits in Hungary Alzoubi Nour N. Gulyas Sandor Geiger Janos 2023-04-01T00:00:00Z https://doi.org/10.14746/logos.2023.29.1.03 https://doaj.org/article/22b0ec3384254644a41d71bdcce76351 EN eng Sciendo https://doi.org/10.14746/logos.2023.29.1.03 https://doaj.org/toc/2080-6574 2080-6574 doi:10.14746/logos.2023.29.1.03 https://doaj.org/article/22b0ec3384254644a41d71bdcce76351 Geologos, Vol 29, Iss 1, Pp 33-49 (2023) freshwater carbonate ct analysis statistical properties palaeoenvironment holocene Geology QE1-996.5 article 2023 ftdoajarticles https://doi.org/10.14746/logos.2023.29.1.03 2023-06-04T00:39:20Z Widely distributed freshwater carbonate sediments, i.e., limestone, dolomitic limestone and dolomite, developed in inter-dune alkaline ponds of the Danube-Tisza Interfluve in the centre of the Carpathian Basin during the Holocene. The key parameters that determine the formation of any given type of carbonate mineral (calcite, dolomite) are temperature, evaporation rate, pH and ion concentrations, in addition to CO2 absorption by aquatic plants. CT analysis is capable of recording small-scale density variations attributable to compositional differences of sedimentary rocks. As the type and proportion of rock-forming minerals and other components is an artifact of past environmental and climatic conditions, CT values may act as potential palaeoenvironmental proxies. The present study compares variations in rock-forming components obtained for freshwater carbonates utilizing the CT method with already available geochemical and palaeoecological proxy data. Variations in molluscan ecology and isotope geochemistry, sedimentation times and CT-based rock density values all indicate the relevance of millennial-scale, climate-driven changes in carbonate formation. As previously observed, the emergence of colder conditions in the North Atlantic, which resulted in increased cyclonic activity and heavier rainfall in western Europe and the Danube watershed area between 10.3 and 9.3 kyr cal BP, resulted in the emergence of humid conditions favouring a rise in the groundwater table at our site and precipitation of calcite from pore waters as opposed to high-magnesium calcite. This is clearly reflected in a negative shift in CT density values in our dated rock samples. Article in Journal/Newspaper North Atlantic Directory of Open Access Journals: DOAJ Articles Geologos 29 1 33 49 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
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English |
topic |
freshwater carbonate ct analysis statistical properties palaeoenvironment holocene Geology QE1-996.5 |
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freshwater carbonate ct analysis statistical properties palaeoenvironment holocene Geology QE1-996.5 Alzoubi Nour N. Gulyas Sandor Geiger Janos Palaeoenvironmental and palaeoclimatic inferences based on X-ray computer tomography: a case study of alkaline lake deposits in Hungary |
topic_facet |
freshwater carbonate ct analysis statistical properties palaeoenvironment holocene Geology QE1-996.5 |
description |
Widely distributed freshwater carbonate sediments, i.e., limestone, dolomitic limestone and dolomite, developed in inter-dune alkaline ponds of the Danube-Tisza Interfluve in the centre of the Carpathian Basin during the Holocene. The key parameters that determine the formation of any given type of carbonate mineral (calcite, dolomite) are temperature, evaporation rate, pH and ion concentrations, in addition to CO2 absorption by aquatic plants. CT analysis is capable of recording small-scale density variations attributable to compositional differences of sedimentary rocks. As the type and proportion of rock-forming minerals and other components is an artifact of past environmental and climatic conditions, CT values may act as potential palaeoenvironmental proxies. The present study compares variations in rock-forming components obtained for freshwater carbonates utilizing the CT method with already available geochemical and palaeoecological proxy data. Variations in molluscan ecology and isotope geochemistry, sedimentation times and CT-based rock density values all indicate the relevance of millennial-scale, climate-driven changes in carbonate formation. As previously observed, the emergence of colder conditions in the North Atlantic, which resulted in increased cyclonic activity and heavier rainfall in western Europe and the Danube watershed area between 10.3 and 9.3 kyr cal BP, resulted in the emergence of humid conditions favouring a rise in the groundwater table at our site and precipitation of calcite from pore waters as opposed to high-magnesium calcite. This is clearly reflected in a negative shift in CT density values in our dated rock samples. |
format |
Article in Journal/Newspaper |
author |
Alzoubi Nour N. Gulyas Sandor Geiger Janos |
author_facet |
Alzoubi Nour N. Gulyas Sandor Geiger Janos |
author_sort |
Alzoubi Nour N. |
title |
Palaeoenvironmental and palaeoclimatic inferences based on X-ray computer tomography: a case study of alkaline lake deposits in Hungary |
title_short |
Palaeoenvironmental and palaeoclimatic inferences based on X-ray computer tomography: a case study of alkaline lake deposits in Hungary |
title_full |
Palaeoenvironmental and palaeoclimatic inferences based on X-ray computer tomography: a case study of alkaline lake deposits in Hungary |
title_fullStr |
Palaeoenvironmental and palaeoclimatic inferences based on X-ray computer tomography: a case study of alkaline lake deposits in Hungary |
title_full_unstemmed |
Palaeoenvironmental and palaeoclimatic inferences based on X-ray computer tomography: a case study of alkaline lake deposits in Hungary |
title_sort |
palaeoenvironmental and palaeoclimatic inferences based on x-ray computer tomography: a case study of alkaline lake deposits in hungary |
publisher |
Sciendo |
publishDate |
2023 |
url |
https://doi.org/10.14746/logos.2023.29.1.03 https://doaj.org/article/22b0ec3384254644a41d71bdcce76351 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Geologos, Vol 29, Iss 1, Pp 33-49 (2023) |
op_relation |
https://doi.org/10.14746/logos.2023.29.1.03 https://doaj.org/toc/2080-6574 2080-6574 doi:10.14746/logos.2023.29.1.03 https://doaj.org/article/22b0ec3384254644a41d71bdcce76351 |
op_doi |
https://doi.org/10.14746/logos.2023.29.1.03 |
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Geologos |
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29 |
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33 |
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49 |
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1769007888864378880 |