Geochemistry of highly saline fluids in the Moravo-Silesian Palaeozoic siliciclastic sequences: genetic implications
| Autoři | |
|---|---|
| Rok publikování | 2009 |
| Druh | Článek v odborném periodiku |
| Časopis / Zdroj | International Journal of Earth Sciences |
| Fakulta / Pracoviště MU | |
| Citace | |
| Obor | Geologie a mineralogie |
| Klíčová slova | Moravo-Silesian Palaeozoic; sedimentary sequences; dolomite veins; fluid chemistry; stable isotopes; water-rock interaction |
| Popis | Post-Variscan dolomites occur in Zn-Pb-Cu veins, Crush-leach, stable isotope (oxygen and carbon) and microthermometry analysis of the fluid inclusions in dolomites, Highly saline H2O-NaCl-CaCl2-MgCl2 fluids occur in inclusions, isotopic fluid composition indicate that the fluid was derived from evaporated seawater, rock-buffering explains the isotopic composition at low w/r ratios, fluid-rock interactions largely controlled the fluid chemistry (K, Li, Br and Na contents, K/Cl, I/Cl and Li/Cl molar ratios). A permeable basement and fractured sedimentary sequence enhanced the general nature of the fluid system. Fluid characteristics are comparable with the main post-Variscan fluid flow systems in the Polish (Cracow-Silesian ore district) and German sedimentary basins. |
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