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Evidences of Rhyacian extensional event in the Central Domain of the Borborema Province, NE Brazil

Armstrong, Richard; Guimaraes, Ignez P.; Silva, E.G.; da Silva Filho, Adejardo F.; Almeida, C.N.

Description

Granitic gneisses (Fazenda Salvador) and metamafic to meta-ultramafic rocks occur as intrusions in granodioritic to granitic orthogneisses, in the Central Domain of the Borborema Province, NE Brazil. The Fazenda Salvador orthogneisses are coarse to very coarse grained, porphyroclastic to equigranular and locally migmatized. Enclaves of dioritic compositions are common, usually showing crenulated to lobate contacts with the augen gneisses. Metabasite and meta-ultramafic rocks including...[Show more]

CollectionsANU Research Publications
Date published: 2014
Type: Journal article
URI: http://hdl.handle.net/1885/69615
Source: Comunicacoes Geologicas

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