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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Adam Mickiewicz University Poznan
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ftamickiewiczojs:oai:ojs.pressto.amu.edu.pl:article/38095 2023-07-30T04:05:32+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 2023-05-08 application/pdf http://pressto.amu.edu.pl/index.php/logos/article/view/38095 eng eng Adam Mickiewicz University Poznan http://pressto.amu.edu.pl/index.php/logos/article/view/38095/32677 http://pressto.amu.edu.pl/index.php/logos/article/view/38095 https://creativecommons.org/licenses/by-nc-nd/3.0/ Geologos; Vol. 29 No. 1 (2023); 33-49 Geologos; Tom 29 Nr 1 (2023); 33-49 2080-6574 1426-8981 freshwater carbonate CT analysis statistical properties palaeoenvironment info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Research papers 2023 ftamickiewiczojs 2023-07-17T20:10:46Z 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 CTbased 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 Adam Mickiewicz University in Poznań: PRESSto |
institution |
Open Polar |
collection |
Adam Mickiewicz University in Poznań: PRESSto |
op_collection_id |
ftamickiewiczojs |
language |
English |
topic |
freshwater carbonate CT analysis statistical properties palaeoenvironment |
spellingShingle |
freshwater carbonate CT analysis statistical properties palaeoenvironment 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 |
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 CTbased 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 |
Adam Mickiewicz University Poznan |
publishDate |
2023 |
url |
http://pressto.amu.edu.pl/index.php/logos/article/view/38095 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Geologos; Vol. 29 No. 1 (2023); 33-49 Geologos; Tom 29 Nr 1 (2023); 33-49 2080-6574 1426-8981 |
op_relation |
http://pressto.amu.edu.pl/index.php/logos/article/view/38095/32677 http://pressto.amu.edu.pl/index.php/logos/article/view/38095 |
op_rights |
https://creativecommons.org/licenses/by-nc-nd/3.0/ |
_version_ |
1772817508256972800 |