DOI: 10.11606/t.44.2013.tde-04062013-164954
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Petrogênese de granitos crustais na Nappe de Empurrão Socorro-Guaxupé (SP-MG): uma contribuição da geoquímica elemental e isotópica

Abstract: Os granada-biotita granitos tipo Nazaré Paulista foram gerados nos níveis mais rasos do segmento exposto (a ca. 5 kbar) pela fusão a ca. 750" c þor quebra de muscovita) de metagrauvacas imaturas que tiveram fontes de longa vida crustal. As características químicas (e.g., altos teores de Sr, Ba, ETRL, Th) e isotópicas (eNd¡zs = -13 a -16;875r/865r:0,713-0,719) desses granitos indicam fontes com características intermediii,¡ias entre as dos granada-biotita gnaisses e dos biotita gnaisses granodioríticos regionai… Show more

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Cited by 25 publications
(52 citation statements)
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“…However a crustal-derived magmatism predominates westward into pelitic and pelitic-carbonaceous schists and quartzites. They are peraluminous granites and sub-volcanic felsites (0.79 Ga) having an older Sm-Nd signature (Pimentel et al, 1992b(Pimentel et al, , 1999a (Pimentel et al, 1999b, Janasi, 1999 (Fig. 4-10-A), prior to the collision episode, as previously proposed (Pimentel et al, 1999a (Simões, 1995, Campos Neto and Caby,I999a).…”
Section: -21 Statherian Taphrogeny: Attempts To Break-up Of the Sãsupporting
confidence: 59%
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“…However a crustal-derived magmatism predominates westward into pelitic and pelitic-carbonaceous schists and quartzites. They are peraluminous granites and sub-volcanic felsites (0.79 Ga) having an older Sm-Nd signature (Pimentel et al, 1992b(Pimentel et al, , 1999a (Pimentel et al, 1999b, Janasi, 1999 (Fig. 4-10-A), prior to the collision episode, as previously proposed (Pimentel et al, 1999a (Simões, 1995, Campos Neto and Caby,I999a).…”
Section: -21 Statherian Taphrogeny: Attempts To Break-up Of the Sãsupporting
confidence: 59%
“…They are younger (0.76 Ga) and chemically more mature rocks (KzO/f{azO>l.0) than the Mara Rosa Arc (Pimentel et al, 1992, Rodrigues et al, 1998 indicating a partial intraoceanic setting and the proximity of an older and thin continental crust. The continental arc basement became isotopically recorded further to the south, in the SocorroGuaxupé terrane (Janasi, 1999 (Pimentel et al, 1999a). However a crustal-derived magmatism predominates westward into pelitic and pelitic-carbonaceous schists and quartzites.…”
Section: -21 Statherian Taphrogeny: Attempts To Break-up Of the Sãmentioning
confidence: 99%
“…A NSG é definida como um segmento continental composto por crosta inferior e média, constituído em um ambiente de arco magmático, produzido pela subducção da placa oceânica existente entre os antigos blocos continentais São Francisco e Paranapanema (Janasi 1999;Campos Neto & Caby 2000;Hackspacher et al 2003;Campos Neto et al 2011;Trouw et al 2000Trouw et al , 2013Vinagre et al 2014).…”
Section: Contexto Regionalunclassified
“…O metamorfismo é de alta temperatura e atingiu alta pressão na base da nappe, por volta de 12 kbar (Del Lama et al 2000;Campos Neto & Caby 2000;Freitas 2000;Garcia & Campos Neto 2003) e foi datado entre 625 e 620 Ma pelos métodos U-Pb e Pb-Pb (Basei et al 1995;Janasi 1999;Vlach & Gualda 2000;Fetter et al 2001;Negri & Oliveira 2005;Peternel 2005). Tavares (2008) determinou para um xisto e granulitos ígneos máficos Trouw et al (2013).…”
Section: Contexto Regionalunclassified
“…Encraves metassedimentares ocorrem como faixas de kinzigito. O migmatito estromático da unidade superior apresenta mesossoma com assinaturas químicas e isotópicas de metagrauvaca e de metapelito oriundos da denudação do arco magmático neoproterozóico (Janasi, 1999).…”
Section: Trabalhos Anterioresunclassified