Geologia, geoquímica e significado tectônico do Complexo Metanortosítico de Passira - Província Borborema - nordeste brasileiro

Accioly, Ana Cláudia de Aguiar

doi:10.11606/t.44.2001.tde-27102015-130049

Cited by 16 publications

(28 citation statements)

References 6 publications

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“…Extensions during this period are recorded to the south of the Patos Lineament in the so-called Transversal Zone, with various basic and acid volcanosedimentary and plutonic sequences formed from the Calymmian to the Statherian (1.52 -1.75 Ga), as reported by Accioly (2001), Sá et al (2002), Accioly et al (2010) and others. These records draw attention to the fact that, at the end of the Paleoproterozoic and the beginning of the Mesoproterozoic, there was a significant magmatism and crustal extension throughout the entire Borborema Province.…”

Section: Discussion and Geodynamic Evolutionsupporting

confidence: 60%

U-Pb and Sm-Nd data of the Rhyacian and Statherian Orthogneisses from Rio Piranhas-Seridó and Jaguaribeano Terranes, Borborema Province, Northeast of Brazil

Sá

Sousa

Legrand

et al. 2014

Geol. USP, Sér. cient.

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The Portalegre shear zone separates the Rio Piranhas-Seridó and the Jaguaribeano geological terranes in the Northern Domain of the Borborema Province. Banded gneisses of the Caicó and the Jaguaretama Complexes represent the basements of these terranes. U-Pb analyses yielded ages of 2,193 ± 16 Ma for the Jaguaretama Complex, which is similar to those obtained for the Caicó Complex. T DM Sm-Nd ages for these basement complexes showed Neoarchean values (ca. 2.5 Ga), with ε Nd(t) values close to the CHUR composition. Elongated bodies were found intruding into the rocks of the Jaguaretama Complex. These foliated bodies with elongated phenocrysts are described as augen gneisses of the Serra do Deserto Suite. These gneisses yielded crystallization ages of 1,777 ± 8 Ma, confirming an extensional period during the Statherian, which is well represented in the Jaguaribeano Terrane by A-type plutonic rocks. Augen gneisses with similar textures, the so called Poço da Cruz Suite, are found intruding the Caicó Complex in the Rio Piranhas-Seridó terrane; however, the ages found throughout the domain are predominantly Rhyacian (ca. 2.2 Ga) and present calc-alkaline affinities. These findings indicate that the augen gneisses, which are widely distributed in these two terranes, have different signatures and are temporally well separated. Furthermore, in agreement with previous geophysical data suggesting a division of terranes marked by the Portalegre Shear Zone, it also demonstrates that even though the Caicó and the Jaguaretama Complexes have similar ages, similar structural evolution and metamorphism under similar pressure and temperature conditions, they exhibit marked differences in composition. Keywords: Borborema Province; Jaguaribeano terrane; Rio Piranhas-Serido terrane; Serra do Deserto Suite; Poço da Cruz Suite; Portalegre shear zone. ResumoA zona de cisalhamento Portalegre separa os terrenos geológicos Rio Piranhas-Seridó e Jaguaribeano do Domínio Setentrional da Província Borborema, com gnaisses bandados dos Complexos Caicó e Jaguaretama representando os respectivos embasamentos destes terrenos. Análises U-Pb forneceram idades de 2.193 ± 16 Ma para os ortognaisses do Complexo Jaguaretama, resultados muito similares às determinadas para o Complexo Caicó. Idades T DM Sm-Nd nesses Complexos forneceram valores neoarqueanos (ca. 2,5 Ga), com ε Nd(t) muito próximos ao CHUR. Intrudindo as rochas do Complexo Jaguaretama, destacam-se corpos alongados, foliados e com pórfiros estirados, denominados de Suíte Serra do Deserto. Estes forneceram idades de cristalização a 1.777 ± 8 Ma, ratificando um período extensional que ocorreu no Estateriano, bem representado no terreno Jaguaribeano por sequências vulcanossedimentares e plutônicas Tipo-A. Augen gnaisses com texturas similares, denominados de Suíte Poço da Cruz, são encontrados intrudindo o Complexo Caicó no terreno Rio Piranhas-Seridó, porém, as idades registradas por todo este domínio são predominantemente Riacianas (ca. 2,2 Ga) e de afinidades cálcio-alcalinas, indica...

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Section: Discussion and Geodynamic Evolutionsupporting

confidence: 60%

U-Pb and Sm-Nd data of the Rhyacian and Statherian Orthogneisses from Rio Piranhas-Seridó and Jaguaribeano Terranes, Borborema Province, Northeast of Brazil

Sá

Sousa

Legrand

et al. 2014

Geol. USP, Sér. cient.

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“…Histograms of zircon U-Pb and 207 Pb/ 206 Pb ages for orthogneisses and granitoids in the central sector of Borborema province. Sources: Van Schmus et al (1995), Silva et al (1996), Da Silva Filho (1998, 2000), Guimarães et al ( , 2000, Melo (1998), Accioly (2000), Leite et al (2000), Brito Neves et al (2001a, 2001b, Sá et al (2002), Neves et al (present study). Dantas et al, 1998;Brito Neves et al, 2001b).…”

Section: Paleoproterozoic Crustal Growthmentioning

confidence: 68%

“…Orthogneisses with younger protoliths occur between the Patos-Campina Grande and West Pernambuco-East Pernambuco shear zone systems. The protoliths of a first group are interpreted as the result of Paleo-to Mesoproterozoic intraplate magmatism (Accioly, 2000;Accioly et al, 2000;Sá et al, 2002). The largest body of this group is an augen gneiss with A-type geochemical affinities-the Taquaritinga orthogneiss ( Fig.…”

Section: Geological Setting and Previous Workmentioning

confidence: 99%

Zircon Pb-Pb Geochronology of the Caruaru Area, Northeastern Brazil: Temporal Constraints on the Proterozoic Evolution of Borborema Province

Neves

Melo

Moura

et al. 2004

International Geology Review

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The Caruaru-Arcoverde batholith, with an outcrop area of ~2000 km 2 , is one of the largest Brasiliano plutons in Borborema Province, northeastern Brazil. The batholith intrudes orthogneisses and supracrustal rocks characterized by flat-lying foliation, and is bounded in the south by a synmagmatic, transcurrent shear zone, interpreted by some as a terrane boundary. In order to constrain the emplacement age of the batholith and the Proterozoic history of the eastern portion of Borborema Province, single zircon grains from seven samples from the Caruaru-Arcoverde batholith and nearby country rocks were analyzed by the Pb-evaporation technique.Zircons from orthogneisses immediately north of the Caruaru-Arcoverde batholith yielded ages of 2098 ± 15 Ma and 2072 ± 3 Ma. One zircon sample from an orthogneiss located south of the batholith gave an age of 2075 ± 7 Ma. Combined with existing zircon U-Pb ages in orthogneisses and Nd model ages of plutons and country rocks in eastern Borborema Province, these data indicate important crustal growth during the Middle Paleoproterozoic (2.2-2.0 Ga). In contrast, a sample from another orthogneiss southeast of the Caruaru-Arcoverde batholith gave an age of 629 ± 9 Ma. Because the flat-lying foliation in different country rocks was formed under the same high-amphibolite-facies conditions, this age suggests that the regional fabric developed during the Late Neoproterozoic. Two samples from the main phase of the Caruaru-Arcoverde batholith yielded mean ages of 591 ± 5 Ma and 587 ± 5 Ma, whereas a sample from a late facies gave an mean age of 583 ± 5 Ma. The oldest age of 591 Ma places an upper bound on the beginning of strike-slip motion, because field evidence indicates that the shear zone developed after emplacement of the Caruaru-Arcoverde batholith.Correlations of the Caruaru area with other sectors of Borborema Province and the Cameroon and Nigerian provinces of western Africa suggest that these areas: (1) were assembled during the Transamazonian/Eburnean orogeny; and (2) formed a coherent unit during the Late Neoproterozoic Brasiliano/Pan-African orogeny, when they were deformed first by a tectonic event, possibly resulting from thrust motion, and then subjected to a strike-slip regime.

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“…Statherian and Calymmian magmatism (1.8e1.4 Ga) has already been referred to in the Rio Capibaribe Terrane, being represented by the Passira Gabbro-Anorthositic complex, dated~1.70 Ga (Accioly, 2000) and A-type Taquaritinga augen gneiss dated to 1.52 Ga (S a et al, 2002). Both magmatic pulses were interpreted as extensional-related events.…”

Section: Regional Correlationsmentioning

confidence: 98%

“…Polycyclic Paleoproterozoic evolution is well documented in orogenic terranes worldwide, mostly directly related to Paleoproterozoic supercontinents, such as the Trans-North China Belt orogen (Faure et al, 2004), Trans-Hudson orogen in the USA/Canada (White et al, 2000;Corrigan et al, 2009;Maxeiner et al, 2005), Ungava Orogen in Canada (St-Onge et al, 1992, 2000, and Oskarshamn-J€ onk€ oping Belt in Sweden (Manfeld et al, 2005;Ski€ old and Rutland, 2006). On the other hand, Statherian-Caliminian extensional events are also coherent with worldwide descriptions and are commonly referred to as the early break-up stages of large Paleoproterozoic land masses (Condie, 2002;Zhao et al, 2004;Meert, 2012).…”

Section: Regional Correlationsmentioning

confidence: 99%

Early to Late Paleoproterozoic magmatism in NE Brazil: The Alto Moxotó Terrane and its tectonic implications for the Pre-West Gondwana assembly

Santos

Dantas

Santos

et al. 2015

Journal of South American Earth Sciences

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Geologia, geoquímica e significado tectônico do Complexo Metanortosítico de Passira - Província Borborema - nordeste brasileiro

Cited by 16 publications

References 6 publications

U-Pb and Sm-Nd data of the Rhyacian and Statherian Orthogneisses from Rio Piranhas-Seridó and Jaguaribeano Terranes, Borborema Province, Northeast of Brazil

U-Pb and Sm-Nd data of the Rhyacian and Statherian Orthogneisses from Rio Piranhas-Seridó and Jaguaribeano Terranes, Borborema Province, Northeast of Brazil

Zircon Pb-Pb Geochronology of the Caruaru Area, Northeastern Brazil: Temporal Constraints on the Proterozoic Evolution of Borborema Province

Early to Late Paleoproterozoic magmatism in NE Brazil: The Alto Moxotó Terrane and its tectonic implications for the Pre-West Gondwana assembly

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