Guimaraes, Ignez P.; Van Schmus, W.R.; de Brito Neves, Benjamin; Bretas Bittar, Sheila M.; da Silva Filho, Adejardo F.; Armstrong, Richard
New geochronological and geochemical constraints on Precambrian sedimentary and volcanic successions exposed in the western part of the Central Domain of the Borborema Province, NE Brazil, indicate the presence of two distinct tectono-stratigraphic complexes: Riacho Gravatá and São Caetano. Both complexes and associated orthogneisses are referred in the literature as the Cariris Velhos belt, having depositional, extrusive, or intrusive ages within the interval 985-913Ma. The Riacho Gravatá...[Show more]
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