Abstract
The aim of this research proposal is to investigate the characteristics and effects of the metasomatic fluids related to the fenitization process that took place at the contacts between ultramafic rocks and carbonatites from different Brazilian occurrences: Salitre, Tapira, Araxá (Alto Paranaíba) e Jacupiranga (Arco de Ponta Grossa) complexes. Studies on alkaline-carbonatite units that di…