Energy Transition Minerals Ltd. announced the results of a aeromagnetic and electromagnetic survey completed at the Villasrubias lithium project. Villasrubias is located in the mining-rich Province of Salamanca in western Spain. Aeromagnetic results have identified several areas of lithium prospectivity to be targeted by an upcoming drill campaign.

The aeromagnetic survey focused on an area of historic aplite and pegmatite mining, and where lithium, tin, niobium and tantalum have been identified by ETM. The geophysical survey was performed using two simultaneous measuring units, a GEM GSMP-35U proton magnetometer installed on a hexacopter drone using a constant height and a 100ms sampling interval with a measuring range of 20,000 to 120,000 nT; and a potassium magnetometer GEM Gsmp-40 with the same measuring range and a sampling interval of 1 sec for the base unit. The total magnetic field and the subsequent pole reduction defined two magnetically differentiable zones (zones A and B), which correspond to lithologically and geochemically differentiated blocks, the pegmatite source (two mica granite) and the host rock of the pegmatite dykes that are metasediments (graywacke and shales).

The known lithium and tin-bearing pegmatite dyke at Villasrubias is located in block B (east). The trace of this intrusive dyke is associated with a zone of lower magnetic susceptibility with respect to the surrounding rock, which enables the interpretation of other potential dykes that have not been previously identified. In Block B, at least four other low relative susceptibility trends have been defined, indicating the potential presence of additional dykes.

These trends follow two preferred orientations (145deg and 55deg). The modelled TILT derivative corroborates with the total magnetic field with reduction to the pole (TMFRP) data, highlighting the contact zones between bodies with different magnetic character. The 3D inversion defines the morphology of the bodies that may relate to lithium- bearing aplite or pegmatite dykes.

The modelling suggests sub-vertical dips whilst depth of the bodies range between 5 and 150 m. Following the successful completion of the geophysical survey, a drilling program of at least 10 holes with depths ranging between 100 and 200m is planned, expected to commence in January 2023.