Studied locality is situated in western part of the Silesian Unit of the Outer West Carpathians. Hydrothermal veins up to 1.5 cm thick are present in igneous rock of the teschenite association. The studied mineralization is composed of calcite, chlorite (pennine) and dolomite. Hydrothermal veins are apparently undeformed. Homogenization temperatures of primary and secondary aqueous fluid inclusions present in calcite vary between 90 and 150 °C. The fluids have generally low salinities (0.5 to 3.1 wt. % NaCl equiv.), positive δ18O values between +5.4 and +8.8 ‰ SMOW and δ13C around -9.5 ‰ PDB. Hydrothermal veins originated from fluids causing the pervasive post-magmatic hydrothermal alteration of the host rock. The parent fluid was most probably a mixture of seawater with diagenetic waters, which have been released during thermal alteration of sediments occurring in the surroundings of the teschenite-association rock body.Studied locality is situated in western part of the Silesian Unit of the Outer West Carpathians. Hydrothermal veins up to 1.5 cm thick are present in igneous rock of the teschenite association. The studied mineralization is composed of calcite, chlorite (pennine) and dolomite. Hydrothermal veins are apparently undeformed. Homogenization temperatures of primary and secondary aqueous fluid inclusions present in calcite vary between 90 and 150 °C. The fluids have generally low salinities (0.5 to 3.1 wt. % NaCl equiv.), positive δ18O values between +5.4 and +8.8 ‰ SMOW and δ13C around -9.5 ‰ PDB. Hydrothermal veins originated from fluids causing the pervasive post-magmatic hydrothermal alteration of the host rock. The parent fluid was most probably a mixture of seawater with diagenetic waters, which have been released during thermal alteration of sediments occurring in the surroundings of the teschenite-association rock body
