Please use this identifier to cite or link to this item: http://www.repositorio.ufop.br/handle/123456789/8376
Title: Late Neoproterozoic–Cambrian granitic magmatism in the Araçuaí orogen (Brazil), the eastern brazilian pegmatite province and related mineral resources.
Authors: Soares, Antônio Carlos Pedrosa
Campos, Cristina Maria Pinheiro de
Noce, Carlos Maurício
Silva, Luiz Carlos da
Novo, Tiago Amâncio
Roncato Júnior, Jorge Geraldo
Medeiros, Silvia Regina de
Castañeda, Cristiane
Queiroga, Gláucia Nascimento
Dantas, Elton
Dussin, Ivo Antonio
Alkmim, Fernando Flecha de
Issue Date: 2011
Citation: SOARES, A. C. P. et al. Late Neoproterozoic–Cambrian granitic magmatism in the Araçuaí orogen (Brazil), the eastern brazilian pegmatite province and related mineral resources. Geological Society Special Publication, v. 350, p. 25-51, 2011. Disponível em: <http://sp.lyellcollection.org/content/350/1/25.full.pdf+html>. Acesso em: 20 de jun. 2017.
Abstract: The Araçuí orogen extends from the eastern edge of the São Francisco craton to the Atlantic margin, in southeastern Brazil. Orogenic igneous rocks, formed from c. 630 to c. 480 Ma, cover one third of this huge area, building up the Eastern Brazilian Pegmatite Province and the most important dimension stone province of Brazil. G1 supersuite (630–585 Ma) mainly consists of tonalite to granodiorite, with mafic to dioritic facies and enclaves, representing a continental calc-alkaline magmatic arc. G2 supersuite mostly includes S-type granites formed during the syn-collisional stage (585–560 Ma), from relatively shallow two-mica granites and related gem-rich pegmatites to deep garnet-biotite granites that are the site of yellow dimension stone deposits. The typical G3 rocks (545–525 Ma) are non-foliated garnet-cordierite leucogranites, making up autochthonous patches and veins. At the post-collisional stage (530–480 Ma), G4 and G5 supersuites were generated. The S-type G4 supersuite mostly consists of garnet-bearing two-mica leucogranites that are the source of many pegmatites mined for tourmalines and many other gems, lithium (spodumene) ore and industrial feldspar. G5 supersuite, consisting of high-K–Fe calc-alkaline to alkaline granitic and/or charnockitic to dioritic/noritic intrusions, is the source of aquamarine-topaz-rich pegmatites but mainly of a large dimension stone production.
URI: http://www.repositorio.ufop.br/handle/123456789/8376
metadata.dc.identifier.uri2: http://sp.lyellcollection.org/content/350/1/25.full.pdf+html
ISSN: 20414722
Appears in Collections:DEGEO - Artigos de periódicos

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