The Brasiliano collage in South America: a review

Neves, Benjamim Bley de Brito; Fuck, Reinhardt A.; Pimentel, Márcio Martins

doi:10.5327/z2317-4889201400030010

Cited by 239 publications

(37 citation statements)

References 60 publications

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“…The São Francisco craton (Almeida, 1977) includes several Archean (3.5-2.5 Ga) fragments reworked and assembled with Paleoproterozoic segments into a protocraton during the 2.1-2.0 Ga orogenic cycle named the Transamazonian orogeny by Almeida (1971). The protocraton has grown via accretion of magmatic arcs (Teixeira et al, 2015) along its southern boundary and accretion of continental-crust terranes to the north (Barbosa & Sabaté, 2004), finally consolidating the São Francisco craton during the late Neoproterozoic Brasiliano collage (Brito Neves, Fuck, & Pimentel, 2014). The São Francisco craton, in its present configuration, is surrounded by the Neoproterozoic Araçuaí Belt to the east and southeast, the Rio Preto and Brasilia belts to the northwest and southwest, and by the Riacho do Pontal and Sergipano belts to the north (Figure 1).…”

Section: The Eastern Margin Of the São Francisco Cratonmentioning

confidence: 99%

Post‐Great Oxidation Event Orosirian–Statherian iron formations on the São Francisco craton: Geotectonic implications

Rosière

Bekker

Rolim³

et al. 2019

Island Arc

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The protocratonic core of the São Francisco craton assembled during the 2.1–2.0 Ga Transamazonian orogeny. Orosirian Fe‐rich sequences that extend from the northwestern border of the São Francisco protocraton (Colomi Group) to the southeast under the Espinhaço Belt (the < 1.99 Ga Serra da Serpentina Group) record the opening of an intracratonic basin with the episodically developed ferruginous waters prior to the initiation of the Espinhaço rift at 1.8 Ga. Ferruginous conditions developed again during deposition of the Canjica Iron Formation of the < 1.7 Ga Serra de São José Group in the Espinhaço rift (contemporaneously with felsic magmatism; Conceição do Mato Dentro Rhyolite and Borrachudos Granitic Suite) and extensive sandstones of the < (1666 ±32) Ma Itapanhoacanga and < (1683 ±11) Ma São João da Chapada Formations. In the upper São João da Chapada Formation, banded hematitic phyllite also records input of Fe‐rich fluids. The young age of these iron formations with respect to the conventionally accepted 1.88 Ga age for the youngest shallow‐marine Paleoproterozoic iron formations, the apparent absence of granular facies (granular iron formations), and yet shallow‐water (above fair‐weather base) depositional environment indicate that an unusual setting developed in a large basin after the Great Oxidation Event, in the aftermath of the Transamazonian orogeny. We propose that mantle plumes led to the opening of a previously unrecognized rift system, that could have caused the magmatism, supplied hydrothermal Fe and led to the opening of the Espinhaço, Pirapora, and Paramirim rifts, later obliterated by the Araçuaí orogenic belt during the Neoproterozoic to Early Paleozoic Brasiliano orogeny. The rift system did not develop into an open continental margin but probably evolved into a broad sag basin, stretching across the São Francisco and Congo cratons.

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Section: The Eastern Margin Of the São Francisco Cratonmentioning

confidence: 99%

Post‐Great Oxidation Event Orosirian–Statherian iron formations on the São Francisco craton: Geotectonic implications

Rosière

Bekker

Rolim³

et al. 2019

Island Arc

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“…The province itself comprises a major portion of NE South American platform, comprising several individual lithotectonic domains that record tectono-magmatic and metamorphic histories spanning Archean to Ediacaran-Cambrian times (Almeida et al 1981, Brito Neves et al 2000. As several other mobile belts of Western Gondwana, it has been built by tectonic convergence of major cratonic blocks (i.e., São Francisco-Congo and São Luís-West Africa cratons), during Neoproterozoic and Cambrian times (Brito Neves et al 2014).…”

Section: Geological Setting Field Relationships and Petrographymentioning

confidence: 99%

“…Most of these orogens/provinces are characterized by Ediacaran to Cambrian arc-related lithotectonic units, that are widespread and preserved. Thus, the investigation of magmatic and metamorphic events provides reliable clues on processes related to the final assembly of Gondwana (Vaughan et al 2005, De Wit et al 2008, Brito Neves et al 2014.…”

Section: Introductionmentioning

confidence: 99%

“…In the Neoproterozoic Borborema Province (NE Brazil, central portion of Western Gondwana), recent geochemical-isotopic investigations, focused on petrological and tectonic aspects of Archean and Paleoproterozoic basement inliers or exotic terranes, demonstrate the complexity Reappraisal of the Sumé Complex: geochemistry and geochronology of metaigneous rocks and implications for Paleoproteorozoic subduction-accretion events in the Borborema Province, NE Brazil and variety of crustal processes that took place prior to its present configuration (e.g., Brito Neves et al 2014, Caxito et al 2016, Ganade et al 2017, Santos et al 2017b, Costa et al 2018. Within its central portion, the Alto Moxotó Terrane/Domain (AMT) is considered one of the most preserved Paleoproterozoic crustal segments of the entire province (Brito Neves et al 2000).…”

Section: Introductionmentioning

confidence: 99%

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Reappraisal of the Sumé Complex: geochemistry and geochronology of metaigneous rocks and implications for Paleoproteorozoic subduction-accretion events in the Borborema Province, NE Brazil

Santos¹,

Santos

2019

Braz. J. Geol.

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The Alto Moxotó Terrane represents the largest exposure of Paleoproterozoic rocks in the central Borborema Province. Several medium-to high-grade metamorphic units are described in the terrane, however geochronological data are still scarce, and the main periods of crust buildup and recycling are poorly known. In this study, we investigate the nature and age of metagranitic and metamafic-ultramafic rocks in the type area of the Sumé Complex. U-Pb zircon data from a metasyenogranite yields a concordant age of 1.97 Ga, which is in contrast with the previously published age of the complex (c. 640 Ma). In addition, Sm-Nd isotope signature indicates Paleoproterozoic to Mesoarchean sources that coupled with negative εNd(t) values suggest reworking of a preexisting crust. Whole-rock geochemical data indicate that metamafic rocks are similar to those already described in the terrane, corresponding to island-arc tholeiites, whereas the metagranitic rocks share similarities with magmas that were generated in an evolved stage of an orogenic setting. The obtained results are coherent with a long-lived Paleoproterozoic accretionary-collisional event (c. 2.1-1.9 Ga) described in the Borborema Province, which is correlative with Paleoproterozoic (c. 2.2-2.0 Ga) basement inliers/terranes from Pan-African Fold belts..

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“…(Trouw et al, 2000;Heilbron et al, 2008). Essa unidade geotectônica apresenta trend estrutural NE-SW e foi desenvolvida durante a colagem Brasiliana/Pan-Africana, com os estágios tectônicos finais estendendo-se até o Ordoviciano Silva et al, 2005;Tupinambá et al, 2007;Brito Neves et al, 2014).…”

Section: Geoquímica De Rocha-total E Química Mineralunclassified

Batólito Serra das Araras: um exemplo de magmatismo granítico peraluminoso sintectônico do Ediacarano, região sudoeste do estado do Rio de Janeiro

Retamal¹

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The Brasiliano collage in South America: a review

Cited by 239 publications

References 60 publications

Post‐Great Oxidation Event Orosirian–Statherian iron formations on the São Francisco craton: Geotectonic implications

Post‐Great Oxidation Event Orosirian–Statherian iron formations on the São Francisco craton: Geotectonic implications

Reappraisal of the Sumé Complex: geochemistry and geochronology of metaigneous rocks and implications for Paleoproteorozoic subduction-accretion events in the Borborema Province, NE Brazil

Batólito Serra das Araras: um exemplo de magmatismo granítico peraluminoso sintectônico do Ediacarano, região sudoeste do estado do Rio de Janeiro

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