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regiao de Colatina, Estado do Espirito Santo, foi objeto de mapeamento geologico e detalhado estudo petrografico e geoquimico visando reconhecer e caracterizar paragnaisses migmatiticos do Complexo Nova Venecia e granitoides sincolisionais do tipo S – Granitoide Colatina, que ocorrem no nucleo metamorfico-anatetico do Orogeno Aracuai. O Complexo Nova Venecia, e representado por paragnaisses migmatiticos, cujas relacoes de campo, dados de mineralogia, petrografia, geoquimica e geocronologia indicam que estas rochas foram, originalmente, sedimentos peraluminosos de composicao grauvaquiana, depositados em possivel bacia de retroarco. O Granitoide Colatina varia de monzogranitos a tonalitos, representando uma fusao anatetica do tipo-S, ocorrida na fase sincolisional do Orogeno Aracuai, mostrando uma persistente foliacao concordante com a foliacao regional. As relacoes do Granitoide Colatina com as rochas do Complexo Nova Venecia evidenciam que se trata de uma fusao autoctone. Palavras chave: Orogeno Aracuai, nucleo metamorfico, granitoides. ABSTRACT GEOLOGY, PETROLOGY AND GEOTECTONIC CONTEXT OF GNEISSES AND GRANITOIDS OF THE COLATINA REGION, ESPIRITO SANTO, BRAZIL. The Colatina region, Espirito Santo state, Brazil, was the subject of detailed geological mapping and geochemical and petrographic study aiming to recognize and characterize the Nova Venecia Complex: migmatitic paragneisses, and S-type syncolisional granitoids – the Colatina Granitoid – occurring in the metamorphic core of the Aracuai orogen. The Nova Venecia Complex is represented by migmatitic paragneiss, whose field relations and mineralogical, petrographical, geochemical and geochronological data indicate that these rocks were originally peraluminous sediments with wacke affinities, probably deposited in a retroarc basin. The Colatina Granitoids varies from monzogranites to tonalites, representing a S-type anatetic melt occurred during the syn-collisional event of the Aracuai orogen, showing a persistent foliation concordant with the regional foliation. An authoctonous melt is interpreted from the relations between the Colatina Granitoids and the rocks from the Nova Venecia Complex. Keywords: Aracuai orogen, metamorphic core, granitoids.

GEOLOGIA, PETROLOGIA E CONTEXTO GEOTECTÔNICO DOS GNAISSES E GRANITÓIDES DA REGIÃO DE COLATINA, ESPÍRITO SANTO