STUDIUM SAMOVOLNÉ DESTRUKCE "JEMNÝCH SINTROVÝCH FOREM"
Vol.8,(2001)
Abstract
Keywords:
cave atmosphere; corrosion; dripping water; equilibrium; saturation
A spontaneous destruction (a corrosion followed by falling) of fine speleothems was studied in the Punkevní Cave (the Moravian Karst) from geochemical point of view. During eight months of the year 2000, the cave atmosphere and dripping waters were monitored. All inner waters (waters from limestone fissures as far as to "mouth of hollow sinters") were found to be close to equilibrium with calcite (SI ~ 0.08 to 0.15). Not being undersaturated, these waters cannot dissolve calcite sinters. The same waters become supersaturated with respect to calcite (SI ~ 0.85 to 2.20) at a contact with cave atmosphere (pCO2 ~ 3,0.10-4 to 4,1.10-3 atm). Thus, during the monitored period, there was not proved any corrosion of the sinters by dripping waters.
cave atmosphere; corrosion; dripping water; equilibrium; saturation
References
Stumm, W. - Morgan J. J. (1981): Aquatic chemistry. - Ed.: J. Wiley & Sons, New York.
White, W.B. (1988): Geomorphology and hydrology of karst terrains. - Ed.: Oxford Univ. Press, New York - Oxford.