2013
DOI: 10.1016/j.jsames.2012.09.006
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Sr–Nd constraints and trace-elements geochemistry of selected Paleo and Mesoproterozoic mafic dikes and related intrusions from the South American Platform: Insights into their mantle sources and geodynamic implications

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Cited by 18 publications
(9 citation statements)
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“…The basement associations of the SFC show T DM model ages older than 1.80 Ga (Teixeira 1985, Sato 1998, in contrast with Tonian anorogenic magmatic rocks emplaced in the cratonic area, and with rocks from the accreted Goiás Magmatic Arc. In the cratonic area, Tonian anorogenic tholeiitic mafic swarms and dike-sill complexes display T DM values between 0.93 Ga and 1.63 Ga (Correa-Gomes & Oliveira 2002, Chaves & Neves 2005, Rosa et al 2005, Girardi et al 2013. The Goiás Magmatic Arc rocks display T DM ages varying between 0.77 and 1.41 Ga (Rodrigues et al 1999, Pimentel et al 2000, Laux et al 2005.…”
Section: Discussionmentioning
confidence: 99%
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“…The basement associations of the SFC show T DM model ages older than 1.80 Ga (Teixeira 1985, Sato 1998, in contrast with Tonian anorogenic magmatic rocks emplaced in the cratonic area, and with rocks from the accreted Goiás Magmatic Arc. In the cratonic area, Tonian anorogenic tholeiitic mafic swarms and dike-sill complexes display T DM values between 0.93 Ga and 1.63 Ga (Correa-Gomes & Oliveira 2002, Chaves & Neves 2005, Rosa et al 2005, Girardi et al 2013. The Goiás Magmatic Arc rocks display T DM ages varying between 0.77 and 1.41 Ga (Rodrigues et al 1999, Pimentel et al 2000, Laux et al 2005.…”
Section: Discussionmentioning
confidence: 99%
“…The Vazante and Canastra group samples scatter around a 2.00 Ga reference line, interpreted here as a mixing line of old cratonic sources, which scatter along the 2.70 Ga reference isochron and Tonian Figure 5. T DM histograms for the metasedimentary rocks from Vazante and Canastra groups (n = 100, Pimentel et al 2001, Silva et al 2006, Rodrigues 2008, Santana 2011, Rodrigues et al 2012, Carvalho 2015, along with data from the basement (n = 191, Teixeira 1985, Sato 1998 and Tonian anorogenic magmatic rocks (n = 39, Tack et al 2001, Correa-Gomes & Oliveira 2002, Chaves & Neves 2005, Rosa et al 2005, Girardi et al 2013, Salgado et al 2016 anorogenic metabasic rocks along the 1.00 Ga reference isochron. Reference isochron would indicate ages between 2.00 and 1.00 Ga for both Vazante and Canastra groups.…”
Section: Discussionmentioning
confidence: 99%
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“…O modelo geoquímico adotado indicou que as fontes parentais dessas intrusões máficas toleíticas foram constituídas predominantemente pelo componente N-MORB com até 30% de fluidos emanados da placa suductada, rica em sedimentos pelágicos (Girardi et al, 2013). Com a finalidade de estabelecer comparações entre os enxames estudados e as intrusões máficas do sudoeste do Cráton Amazônico foram elaboradas as Figuras 9A e 9B e a Tabela 2.…”
Section: Ambientes Geotectônicos Correlações E Considerações Finaisunclassified
“…Diversas pesquisas realizadas sobre diques máficos evidenciaram a importância e o porquê de se estudar esse magmatismo basáltico fissural (e.g., Halls, 1982;Oliveira e Montes, 1984;Windley, 1984;Halls e Fahrig, 1987). No Brasil, estudos têm se efetuado em áreas cratônicas (e.g., Menezes, 1992;Corrêa-Gomes et al, 1996;Menezes Leal, 1997;Corrêa da Costa, 2003;Corrêa da Costa et al, 2006, 2009Menezes Leal et al, 2012;Girardi et al, 2011Girardi et al, , 2013Girardi et al, , 2017Trindade Netto et al, 2016;Pinheiro Amorim, 2017;Teixeira et al, 2019;Giovanardi et al, 2019), pois essas manifestações de magmatismo preenchem fraturas que revelam condições distensivas na crosta, fornecem indicações das condições reológicas do meio, são alimentadoras e condutoras de ascensão magmática do manto para a crosta, permitem estabelecer as condições que operavam em ambientes intraplaca ou nas margens de placas continentais e contribuem para o entendimento do magmatismo basáltico fissural na história da Terra.…”
Section: Introductionunclassified