Brazil currently has one of the most extensive uranium resources in the world, with about 245 thousand tons of contained uranium (U3O8). However, the country has the potential to be among the three largest reserves globally. The Brazilian Nuclear Policy, recently published, highlights, among its objectives, to promote research
and prospection of nuclear ores in the country and to encourage the national production of nuclear ores. This work presents a map of favorability for uranium deposits in the country on a continental scale, divided by geological domains, called "geocompartments", and a synthesis of the current knowledge, to subsidize the
decision-making of the public power and to promote the mineral industry to expand the national resources. The Favorability map uses the knowledge-driven analysis manual or cognitive, the 15 types of uranium deposits (IAEA) are grouped into six sets of mineral systems: i) igneous, ii) metamorphic/metasomatic, iii) Proterozoic
unconformity, iv) paleoconglomerate, v) sedimentary and vi) superficial. Based on the knowledge of specialists, the main elements associated with the mineralizing processes in terms of source, transport, and deposition of uranium were listed. These items received subjective probability scores between (0) and (1). The value obtained was multiplied by the quality factor, which qualifies potential deposits in terms of grade and average tonnage. The final favorability score results of the sum of the scores of the six systems for each geocompartment. The map highlights areas with high and very high favorability where two or more uranium mineral systems occur, in general, with their respective high ratings. The high favorability scores also indicate areas with a potential overlapping of different uranium mineral systems, generally observed in relevant uranium deposits, such as the Itataia deposit in Santa Quitéria-CE. In addition, due to the quality factor, the multiplier applied in each system, the areas with the highest scores may also indicate a potential for deposits with better grade tonnage relations. The favorability modeling on a continental scale highlighted several areas, such as Carajás, Santana do Araguaia Domains, Iriri-Xingu, Gavião Block, and Escudo Sul-Rio- Grandense/Camaquã, which will be the object of a more detailed study at province, district, or deposit-scale with the continuity of the work program. Favorability maps, as well as other spatial data modeling products, are tools to assist decision-making
in prioritizing areas for mineral exploration and, thereby, reducing exploration risk.