Corrosion of calcite speleothems in epigenic caves of Moravian Karst (Czech Republic)
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Date
2024-03-14
Authors
Faimon, Jiří
Baldík, Vít
Štelcl, Jindřich
Všianský, Dalibor
Rez, Jiří
Pracný, Pavel
Novotný, Roman
Lang, Marek
Roubal, Zdeněk
Szabó, Zoltán
0000-0002-2081-5747Advisor
Referee
Mark
Journal Title
Journal ISSN
Volume Title
Publisher
Springer
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Abstract
Corrosion processes were studied in epigenic caves of the Moravian Karst (MK). Samples of naturally corroded speleothems and carbonate rocks collected in various MK caves were compared with limestone and calcite standards that were corroded under well-controlled conditions in the laboratory. Two stages of corrosion were distinguished: (1) an early stage of pitting and linear corrosion predisposed by point and line defects in the standards, and (2) an advanced stage characterized by deep corrosion of the entire standard surface. During the second stage, the internal structure of the corroded substrate remained partially preserved, however, if the water was extremely aggressive, the corrosion progressed to depth en-bloc regardless of the structure. In this paper, we (1) proposed a new corrosion mechanism based on the binding of aqueous calcium by clays and tested it experimentally in the cave, (2) characterized conditions that generally favor the formation of aggressive waters (water undersaturated with calcite) into seven categories incorporating them into a conceptual model of the karst vertical profile, and (3) discussed anthropogenic influences on these processes.
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Citation
Environmental Earth Sciences. 2024, vol. 83, issue 6, p. 1-20.
https://link.springer.com/article/10.1007/s12665-024-11449-w
https://link.springer.com/article/10.1007/s12665-024-11449-w
Document type
Peer-reviewed
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Published version
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Language of document
en