Named shaft of the Silius / Muscadroxiu fluorite mine, commemorating Polish engineer Henry Skaba, who died at the mine on 7 March 2001.
Pozzo Skaba is a named shaft of the Miniera di Silius, within the Muscadroxiu–Genna Tres Montis fluorite vein system in the Gerrei district of south Sardinia. The Silius vein system is a fluorite-baryte mineralised system with associated lead-zinc sulphides, extending between the Acqua Frida, Muscadroxiu and Genna Tres Montis shaft areas. The Comune di Silius and Miniere di Sardegna identify Pozzo Skaba as one of the shafts of the Silius mining complex, named in memory of the Polish engineer Henry Skaba, an employee of the mining contractor Kopex, who died at the mine on 7 March 2001.
The current coordinates fall in the Muscadroxiu area and are consistent with the Silius mine system rather than with Montevecchio. The previous attribution to the Montevecchio lead-zinc-silver district should therefore be removed.
The Silius mining complex lies in the Gerrei district of south Sardinia and exploited a fluorite-baryte vein system with associated lead-zinc sulphides. Mindat describes the Silius vein system as cropping out discontinuously for approximately two to three kilometres along a north-east to south-west strike between the Acqua Frida area, the Muscadroxiu shaft and the Genna Tres Montis shaft, at elevations of roughly 600 to 700 metres above sea level. At depth, the mineralised system extends further, with the veins worked from the surface down to about 200 metres above sea level and explored to around 100 metres above sea level.
The mine developed around several named shaft and working areas, including Genna Tres Montis, Muscadroxiu, Pozzo Centrale and Acqua Frida. The Comune di Silius identifies Pozzo Skaba as one of the mine shafts, together with Pozzo Centrale and Pozzo S’Acqua Frida. Miniere di Sardegna describes Pozzo Skaba at Muscadroxiu and explains that the shaft was named after the Polish engineer Henry Skaba, an employee of the contractor Kopex, who died at the Silius mine on 7 March 2001.
The broader Silius / Muscadroxiu–Genna Tres Montis system produced fluorite, with galena, sphalerite, baryte and other associated minerals recorded from the vein system. The precise construction date, depth and operational function of Pozzo Skaba have not been fully established from the public sources consulted here, but the shaft name and its association with the Silius mining complex are supported by local institutional and mining-heritage sources. The coordinates now attached to this record fall in the Muscadroxiu area and should be treated as a corrected location for the Silius mine, not as a Montevecchio or Guspini site.