Caracterização litológica a a partir do mapeamento geológico (escala 1:50.000) do complexo Canindé e seus recursos minerais, localidade de São domingos, Caridade-Ceará

Abstract

Ceará Central Domain is a Constant target of researches on the geotectonic ambit of the North portion of Borborema Province. In the present work, the investigated area comprises a sequence of para-derivatives rocks and granodioritic and amphibolitic intrusions, metamorphosed in medium and high grade. As a result of this graduation report we prepared a geological map and a map of points on a scale of 1:50.000, where migmatites and gneisses of variable composition have been characterized, blocks of calc-silicate rocks, garnet amphibolites and lenticular amphibolites embedded as bands in migmatites. This lithologic association, followed by regional characteristics such as the presence of aluminous schists and marbles, in addition to calc-silicate rocks, suggests para-derivative origins to most of the rock types described. Petrographic analysis revealed no parageneses in equilibrium on the eclogite facies, however, associations composed by K-feldspar + garnet + sillimanite suggests equilibrium in conditions of high pressure. About the geotectonic environment, is possible that the rocks of the Canindé Complex may represent, in part, a segment of a pelitic/psamitic sequence generated in a back-arc basin type in Neoproterozoic age and metamorphosed under high degree conditions, with occasional records of high pressure.