The exploration area is in the southwest sector of the Central Iberian Zone near the contact point with the Ossa Morena Zone and belongs to the Góis-Segura stannous-tungstiferous metallogenic belt. This strip has an area of approximately 8,000 km2 and is known to possess large deposits which gave rise to the mines of Panasqueira (W-Sn-Cu), Argemela (Sn), Segura (W-Sn-Pb) and Góis (W-Sn).
The Góis region is located in the Serra da Lousã and is marked by steep reliefs, among which the Penedos de Góis are particularly notable. These reliefs consist of quartzite ridges dating back to the Ordovician period which belong to the Armorican Quartzite Formation, and reach an altitude of around 1,043 metres. The Penedos de Góis are hard land forms, rather elongated in a N30ºW direction. These reliefs are embedded in older schist and greywackes belonging to the Schist Greywacke complex of the Beiras Group, which dates back to the Neoproterozoic era, where the two previous lithologies predominate but conglomeratic levels also occur. The Schist Greywacke Complex is divided in this region into three formations, which bottom-up are: The Caneiro Formation, the Boque Serpins Formation and the Colmeal Formation.
To the northwest, the Schist Greywacke Complex is separated from sedimentary deposits of the Cretaceous to the Quaternary by the Góis fault. This fault, which runs in a NE-SW direction, is the main structure of the region and now has an inverse movement that causes the thrust of the older Schist Greywacke Complex over the more recent Meso-Cenozoic units.
The folding in the region is fairly well demonstrated across the whole area, anticlines and synclines being visible in a NW-SE direction corresponding to the 3rd stage of variscan deformation and associated cleavage. Several faults in dominant directions NNE-SSW, N-S and NE-SW occur in the area and may present locally significant fills of quartz.