2004
The study of recent destructive processes in the Moravian Karst caves (Czech republic)
FAIMON, Jiří, Jiří ZIMÁK, Petr ZAJÍČEK, Monika SCHWARZOVÁ, Jindřich ŠTELCL et. al.Základní údaje
Originální název
The study of recent destructive processes in the Moravian Karst caves (Czech republic)
Název česky
Studium recentních destruktivních procesů v jeskyních Moravského krasu (ČR)
Autoři
FAIMON, Jiří (203 Česká republika, garant), Jiří ZIMÁK (203 Česká republika), Petr ZAJÍČEK (203 Česká republika), Monika SCHWARZOVÁ (203 Česká republika) a Jindřich ŠTELCL (203 Česká republika)
Vydání
Geographica, Olomouc, Palacký University Olomouc, 2004, 0231-9365
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
Geochemie
Stát vydavatele
Česká republika
Utajení
není předmětem státního či obchodního tajemství
Kód RIV
RIV/00216224:14310/04:00028902
Organizační jednotka
Přírodovědecká fakulta
Klíčová slova česky
jeskyně; CO2; koroze; destrukce; skapová voda; pukliny; brčka; přesycení
Klíčová slova anglicky
cave; CO2; corrosion; destruction; dripping water; fissures; straw stalactite; supersaturation
Štítky
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 15. 2. 2010 12:59, doc. Ing. Jiří Faimon, Dr.
V originále
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.
Česky
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.
Návaznosti
| GA205/03/1128, projekt VaV |
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