Tectonic setting of basic igneous and metaigneous rocks of Borborema Province, Brazil using multi-dimensional geochemical discrimination diagrams

Geochemistry and U–Pb zircon ages of plutonic rocks from the Algodões granite-greenstone terrane, Troia Massif, northern Borborema Province, Brazil: Implications for Paleoproterozoic subduction-accretion processes

“…As already discussed in the introduction, the Algodões amphibolites were dated at ca. 2236 Ma (Martins et al, 2009) and share similar geochemical features with oceanic plateau and/or back-arc basalts (Martins et al, 2009;Verma and Oliveira, 2015). The Algodões sequence records upper greenschist to lower amphibolite metamorphic conditions and lacks migmatization (e.g., Martins, 2000;Arthaud et al, 2008).…”

Petrografia e geoquímica dos ortoanfibolitos das unidades Novo Gosto e Gentileza, Domínio Canindé, Faixa de Dobramentos Sergipana, Nordeste brasileiro

“…A partir desses estudos, inúmeros diagramas de discriminação tectônica foram propostos (e.g. Pearce & Cann, 1973;Pearce & Norry, 1979;Wood, 1980;Pearce, 1982Pearce, , 1996Pearce, , 2008Pearce, , 2014Shervais, 1982;Meschede, 1986;Vermeesch, 2006;Verma et al, 2006;Agrawal et al, 2008;Verma & Agrawal, 2011;Verma & Oliveira, 2015;Saccani, 2015;Wang et al, 2016;Li et al, 2017), com o intuito de identi icar e entender os processos envolvidos na geração e evolução dos magmas e assim desvendar a a inidade tectônica de rochas básicas antigas.…”