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U-Pb zircon ages of orthogneisses and supracrustal rocks of the Cariris Velhos belt: Onset of Neoproterozoic rifting in the Borborema Province, NE Brazil

Guimaraes, Ignez P.; Van Schmus, W.R.; de Brito Neves, Benjamin; Bretas Bittar, Sheila M.; da Silva Filho, Adejardo F.; Armstrong, Richard

Description

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]

CollectionsANU Research Publications
Date published: 2012
Type: Journal article
URI: http://hdl.handle.net/1885/51790
Source: Precambrian Research
DOI: 10.1016/j.precamres.2011.10.008

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