Análise e caracterização dos aspectos geológicos de uma área localizada a norte - noroeste (NNW) do município de Uruoca, domínio médio Coreaú — CE

Abstract

The work present refers to the geological mapping in a scale of semi detail (1:25.000), in an area of 50 km2, realized in the north-northwestern region of the municipality of Uruoca, northwestern of the State of Ceara, located in the Borborema Province represented Médio Coreaú Domain About the geological mapping presented an variety of rocky types, where identified units with age from Paleoproterozoic until Cenozoic. These units were defined from base to the summit as: Granja Complex — basement, composed by hornblende gneiss and biotite homblende gneiss; and the Martinópole Group — supracrustal sequences with the formations: São Joaquim with pure and impure quartzites, compact and laminates with sillimanite; and Santa Terezinha with filites, muscovite filites e metasiltites. The area is characterized structuralment by present an polycyclic feature, where the feature more representative is the shear Uruoca-Tucunduba zones NE-SW oriented. The evolution history of the area define the Granja Complex as strip of rocks which achieved metamorphism in anfibolite facies with NE-SW direction, partially migmatized; and the Martinópole Group with supracrustal rocks present an metamorphism from greenschist facies to anfibolite facies, these lithology ever occurring delimited by transcurrent shear (Z. C. Uruoca-Tucunduba e Xixás) with the basement of the Granja Complex.