Publication details
Charakteristika anomálního skapu v Punkevních jeskyních (Moravský kras)
| Title in English | Characteristics of anomalous drip in Punkva caves (Moravian Karst) |
|---|---|
| Authors | |
| Year of publication | 2014 |
| Type | Article in Periodical |
| Magazine / Source | Geologické výzkumy na Moravě a ve Slezsku |
| MU Faculty or unit | |
| Citation | |
| Web | https://journals.muni.cz/gvms/article/view/2756 |
| Doi | http://dx.doi.org/10.5817/GVMS2014-1-2-103 |
| Field | Geochemistry |
| Keywords | Punkva caves; dripwaters; prior calcite precipitation; calcite saturation |
| Description | The hydrogeochemistry of four dripwaters in the Punkva Caves (Moravian Karst) was systematically studied for anomalous properties during one-year period. The drips are situated in a passage behind Přední Dóm Chamber (CP1 and CP2, 24 samples each), in Tunnel Corridor (TC1, 24 samples), and in Zadní Dóm Chamber (ZD1, 6 samples). The dripwaters CP1, CP2, and ZD1 show various flow regimes but very similar hydrogeochemical properties: electric conductivity (EC = 550-630 µS/cm), saturation (SIcalcite = 0.8-1.2), and Mg/Ca ratio (1000*(Mg/Ca) = 15-20). In contrast, the dripwater TC1 shows stable drip rate and EC = 275-350 µS/cm, SI = -0.1 to 0.3, and almost thrice as high Mg/Ca ratios as other drips. High and stable discharge of the drip TC1, combined with low EC, SI close to zero, and high Mg/Ca ratio indicate that a prior precipitation of calcite is responsible for the anomalous composition of the dripwater. The slightly negative SI values that were occasionally observed indicate that further minor processes probably participate on the water formation. |