The Luís Alves, Serra Negra and ltatins complexes are Arehean to early Proterozoic metamorphic units in the Brazilian States of Santa Catarina, Paraná and São Paulo, south of the 24°S parallel. This paper summarizes their geological evolution based on petrographic, chemical, and mainly geochronological data. The three complexes consist of metamorphic rocks of the granulite facies, dominantly: norites, enderbites. charnoenderbites, ultramafites of granulite facies, kinzigites, quartzites, biotite-hornblende gneisses, meta-quartz diorites, metadiorites, metagabbros, serpentinites and talcites. Petrographic and chemical data support an igneous origin for most of these rocks. The radiometric age determinations made bythe Rb-Sr and the K-Ar methods on different materiais gave results related, for the most part, to the Pre-Jequié (about 3,100 m.y.), Jequié (2,600 ± 200 m.y.) and Transamazônico (2,000 ± 200 m.y.) events. Geochronological data suggest that the three complexes were formed predominantly by crustal accretion-differentiation processes.The Luís Alves, Serra Negra and ltatins complexes are Arehean to early Proterozoic metamorphic units in the Brazilian States of Santa Catarina, Paraná and São Paulo, south of the 24°S parallel. This paper summarizes their geological evolution based on petrographic, chemical, and mainly geochronological data. The three complexes consist of metamorphic rocks of the granulite facies, dominantly: norites, enderbites. charnoenderbites, ultramafites of granulite facies, kinzigites, quartzites, biotite-hornblende gneisses, meta-quartz diorites, metadiorites, metagabbros, serpentinites and talcites. Petrographic and chemical data support an igneous origin for most of these rocks. The radiometric age determinations made bythe Rb-Sr and the K-Ar methods on different materiais gave results related, for the most part, to the Pre-Jequié (about 3,100 m.y.), Jequié (2,600 ± 200 m.y.) and Transamazônico (2,000 ± 200 m.y.) events. Geochronological data suggest that the three complexes were formed predominantly by crustal accretion-differentiation processes.