Naslov
Some Contributions for Research of Condensation Corrosion in Caves (Dinaric karst, Croatia)

Autori
Garašić, Davor ; Garašić, Mladen

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
6. Hrvatski geološki kongres s međunarodnim sudjelovanjem.6th Croatian Geological Congress with international participation. Knjiga sažetaka. Abstracts Book. / Horvat, Marija ; Matoš, Bojan ; Wacha, Lara - Zagreb : Hrvatski geološki institut, 2019, 72-72

Skup
6. hrvatski geološki kongres s međunarodnim sudjelovanjem

Mjesto i datum
Zagreb, Hrvatska, 09.10.2019. - 12.10.2019

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
karst, caves, condensation corrosion, speleology, Croatia

Sažetak
...The research on the prevalence of condensation corrosion in speleogenesis have been conducted in the karst of Croatian coast for the first time. It is the instalment and part of the international project. Condensation corrosion in caves occurs on cold rock surface in contact with the warm and humid air coming from the terrain surface. A thin layer of water appears on the rock surface and reacts chemically with it. This process is very noticeable on the cave entrances in the arid areas when the hot air from the surface rapidly enters the cold caves. Condensation corrosion forms round shapes on the rocks, domes, sometimes similar to “vortex pots” on the ceilings and corroded speleothems....Extraordinary examples of condensation corrosion have been found in some coves in the coastal area of Croatian karst where the temperature gradients are more expressed. The air humidity in the parts of the caves closer to the terrain surface can be changed due to the effects of strong winds (Bura, Jugo etc.). Examples of such condensation corrosion were noticed in several vertical caves near Maslenica and on Murter Island (fig. 1). Due to the vicinity of the sea the effects of salinization are sometimes also found on the cave entrances. In the research conducted in Cyprus (CAILHOL et al., 2019) condensation corrosion correlated with the larger colonies of bats in the caves. Namely, the metabolism of bats and the chemical decomposition of guano change the temperature, humidity and acidity of the cave (AUDRA et al., 2018). Such research in the sense of condensation corrosion have not been conducted before in Croatia. Caves included in the research along the Croatian coast are speleogenetically linked to Cretaceous or Eocene dolomitic limestones and limestones. The majority of caves are tied to neo-tectonic rising of the primary blocks. The altitude of their entrances today is approximately 100 meters above sea level. In some caves the concentration of radon gas was measured. The results of which were slightly higher than the average concentrations measured in the caves of that area. But so far the data cloud is too small to draw conclusions....

Izvorni jezik
Engleski

Znanstvena područja
Geologija

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