This mineralization occurs as veins and vein breccias in fractures associated with the Tyndrum-Glen Fyne fault. Quartz, galena and sphalerite, with minor chalcopyrite and baryte, are accompanied by small inclusions (in the galena-rich veins) of tetrahedrite, pyrargyrite, marcasite and pyrite. Uraniferous veins post-date the main Pb-Zn mineralization and contain uraninite, calcite, baryte, galena, sphalerite, chalcopyrite, argentite, chalcocite, tetrahedrite and safflorite. Fluid inclusion studies indicate a mineralizing solution with approx 20 wt.% equiv. NaCl + KCl, a Na/K ratio of 3:1 and which was boiling during mineral precipitation. The depositional sequence is discussed.-R.A.H
