FAIMON, Jiří, Jiří ZIMÁK, Petr ZAJÍČEK, Monika SCHWARZOVÁ and Jindřich ŠTELCL. The study of recent destructive processes in the Moravian Karst caves (Czech republic). Geographica. Olomouc: Palacký University Olomouc, 2004, vol. 38, No 1, p. 9-13. ISSN 0231-9365.
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Basic information
Original name The study of recent destructive processes in the Moravian Karst caves (Czech republic)
Name in Czech Studium recentních destruktivních procesů v jeskyních Moravského krasu (ČR)
Authors FAIMON, Jiří (203 Czech Republic, guarantor), Jiří ZIMÁK (203 Czech Republic), Petr ZAJÍČEK (203 Czech Republic), Monika SCHWARZOVÁ (203 Czech Republic) and Jindřich ŠTELCL (203 Czech Republic).
Edition Geographica, Olomouc, Palacký University Olomouc, 2004, 0231-9365.
Other information
Original language English
Type of outcome Article in a journal
Field of Study Geochemistry
Country of publisher Czech Republic
Confidentiality degree is not subject to a state or trade secret
RIV identification code RIV/00216224:14310/04:00028902
Organization unit Faculty of Science
Keywords (in Czech) jeskyně; CO2; koroze; destrukce; skapová voda; pukliny; brčka; přesycení
Keywords in English cave; CO2; corrosion; destruction; dripping water; fissures; straw stalactite; supersaturation
Tags cave, CO2, corrosion, destruction, dripping water, fissures, straw stalactite, supersaturation
Tags International impact, Reviewed
Changed by Changed by: doc. Ing. Jiří Faimon, Dr., učo 1405. Changed: 15/2/2010 12:59.
Abstract
This work tried to decide whether an occasionally observed falling of straw stalactites in the Moravian Karst caves is caused by a hypothetical chemical corrosion. The straw stalactite wall was found to be formed by three calcite layers. The middle layer (a stalactite skeleton) was typically cracked in agreement with calcite cleavage. Some impact of chemical corrosion was positively identified on the outer side of straw stalactite walls. Any corrosion of the inner wall of stalactite channel was not explicitly proved. This is consistent with the supersaturation of the majority of monitored dripping waters with respect to calcite (SI=0.2 to 1.2). However, the finding of unsaturated dripping water in the Punkevní Caves (SI=-0.8 to -0.3) did not allow to exclude the chemical corrosion definitively. The seasonal increase of cave CO2-concentrations (up to 1 vol. %) was consistent with increasing number of visitors (up to 28 000 per month in the Punkevní Caves) and with the CO2-production in the soils above caves (up to 1 vol. % in soil atmosphere in Summer). The drop of the cave CO2-concentrations in Fall and Winter roughly corresponds to the decrease of the soil CO2-concentration, visitor number, and probably also to change in cave ventilation. Enhanced concentrations of NO3- in the Amatérská Cave (up to 1.2x10-3 mol/l) indicate anthropogenic pollution.
Abstract (in Czech)
This work tried to decide whether an occasionally observed falling of straw stalactites in the Moravian Karst caves is caused by a hypothetical chemical corrosion. The straw stalactite wall was found to be formed by three calcite layers. The middle layer (a stalactite skeleton) was typically cracked in agreement with calcite cleavage. Some impact of chemical corrosion was positively identified on the outer side of straw stalactite walls. Any corrosion of the inner wall of stalactite channel was not explicitly proved. This is consistent with the supersaturation of the majority of monitored dripping waters with respect to calcite (SI=0.2 to 1.2). However, the finding of unsaturated dripping water in the Punkevní Caves (SI=-0.8 to -0.3) did not allow to exclude the chemical corrosion definitively. The seasonal increase of cave CO2-concentrations (up to 1 vol. %) was consistent with increasing number of visitors (up to 28 000 per month in the Punkevní Caves) and with the CO2-production in the soils above caves (up to 1 vol. % in soil atmosphere in Summer). The drop of the cave CO2-concentrations in Fall and Winter roughly corresponds to the decrease of the soil CO2-concentration, visitor number, and probably also to change in cave ventilation. Enhanced concentrations of NO3- in the Amatérská Cave (up to 1.2x10-3 mol/l) indicate anthropogenic pollution.
Links
GA205/03/1128, research and development projectName: Recentní krasové procesy: destrukce speleotém
Investor: Czech Science Foundation, Standard Projects
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