Prospecting Tartgets for Mineral Exploration - A Case Study of the Goias Alkaline Province

The Goias Alkaline Province (GAP) is characterized by strong remnant magnetization and significant potential for Ni, Cu, Vermiculite, P 2 O 5 , among other resources. Several GAP complexes had previously been modeled using magnetic susceptibility inversion methods; however, these methods are not ideal due to the pronounced remnant magnetization of the rocks. A more detailed analysis is therefore necessary to better define the individual shape, emplacement styles, and remnant magnetization values of these complexes. Magnetic Vector Inversion (MVI), considered the most suitable method for such conditions, was applied to all GAP complexes. As a result, ten new smaller complexes were identified and assigned to the GAP. The magnetic susceptibility characteristics obtained through MVI vary according to the lithology of the alkaline and host rocks, as well as on the size of the modeled area. Consequently, it is not possible to assign a single magnetic susceptibility value for identifying these complexes, additional information is required. The geometry of the bodies is diverse, with emplacement types including pipe, T-shape, funnel, finger-like, and dike forms. Three-dimensional magnetic inversion using MVI has proven to be a promising technique for refining known complexes and for detecting previously unmapped GAP bodies. Moreover, the methodology can be replicated for exploration in other geological contexts.