Diagenetic source of fluids causing the hydrothermal alteration of teschenites in the Silesian Unit, Outer Western Carpathians, Czech Republic: Petroleum-bearing vein mineralization from the Stříbrník site

► Post-magmatic hydrothermal alteration of teschenites in the Silesian Unit. ► Diagenetic origin of fluids. ► Fluid inclusions containing mature methane-rich petroleum. ► Generation of overheated fluids by tectonic processes.