U–Pb and Lu–Hf isotopes applied to the evolution of the late to post-orogenic transtensional basins of the dom feliciano belt, Brazil

Oliveira, Christie Helouise Engelmann de; Chemale, Farid; Jelinek, Andréa Ritter; Bicca, Marcos Müller; Philipp, Ruy Paulo

doi:10.1016/j.precamres.2014.03.008

Cited by 46 publications

(16 citation statements)

References 58 publications

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“…The peperitic features found on the mineralized subvolcanic trachyte sill upper contact, at Area 1 of the Santa Maria deposit, indicate magma-wet sediment interaction. The age obtained for the DMK-CL sample (565 ± 5 Ma), located at the Claudino farm, is equivalent to the maximum depositional age of the Santa Barbara Group (566 ± 7 Ma; Bicca et al 2013;568 ± 6 Ma;Oliveira et al 2014), determined from the dating of detrital zircon crystals. This is probably due to the fact that trachyte intruded wet sediments as a subvolcanic sill, like Area 1 trachytic rock, or means it is formed as a lava flow during a rapid succession of sedimentation and magmatic events.…”

Section: Discussionmentioning

confidence: 79%

“…Different proposals have been presented for the formation and evolution of this basin (Brito Neves and Cordani 1991, Fernandes et al 1992, Fragoso-Cesar et al 2000, 2003. The dominant interpretation, however, is that a retroarc basin, related to the late to post-orogenic stages of the Brasiliano cycle, evolved into a rift basin in its final stages (Gresse et al 1996, Paim et al 2000, Almeida et al 2012, Oliveira et al 2014.…”

Section: Regional Geologymentioning

confidence: 99%

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Isotopic study of the Pb-Zn (Cu-Ag) Santa Maria Deposit, Caçapava do Sul Region, Rio Grande do Sul, Brazil

Pereira

Macambira

Pires³

et al. 2021

Braz. J. Geol.

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The Camaquã Mines, in the central-southern region of Rio Grande do Sul State, Brazil, contain the largest deposits of base metals (Camaquã, Cu; Santa Maria, Pb-Zn) in the Camaquã Basin. The host rocks are consisted of sandstones and conglomerates of the Santa Bárbara Group and interbedded volcanic rocks of undefined stratigraphic position. Peperitic features were identified in a mineralized trachytic sill. An age of 565 ± 5 Ma (U-Pb LA-MC-ICP-MS) was obtained for another trachytic rock, which allowed for the identification, for the first time, of the Acampamento Velho Formation in the Camaquã Mines region. Stratigraphic relations demonstrate that both rocks represent this magmatism. Data from Pb isotopes and spatial relationship observed in the field indicate a possible genetic link between Acampamento Velho Formation and Camaquã mineralization. Pb isotopic data also suggest a predominantly older crustal source (1.07 Ga model age) for Pb and possibly for the other metals, with intermediate or mixed origin, suggesting that magmatic-hydrothermal fluids leached the metals from the percolated rocks of the basement.

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Section: Discussionmentioning

confidence: 79%

Section: Regional Geologymentioning

confidence: 99%

Isotopic study of the Pb-Zn (Cu-Ag) Santa Maria Deposit, Caçapava do Sul Region, Rio Grande do Sul, Brazil

Pereira

Macambira

Pires³

et al. 2021

Braz. J. Geol.

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“…The contribution of Höfig et al (2018) demonstrates that a unit traditionally considered a single unit can contain imbricated Tonian and Ediacaran sequences. In the Ediacaran Santa Bárbara and Guaritas groups of the same area, Paleo-and Neoproterozoic detrital zircon grains prevail and show dominant Archean and Paleoproterozoic Hf model ages (Oliveira et al, 2014). Despite the different abundances in the detrital zircon age distributions, Archean, Paleo-and Mesoproterozoic age peaks are similar to those observed in Uruguay in the western Dom Feliciano Belt and are consistent with the prolongation of the Nico Pérez Terrane in Rio Grande do Sul, as proposed by Oyhantçabal et al (2018) and Oriolo et al (2019), among others.…”

Section: Regional Implicationsmentioning

confidence: 96%

Provenance of metasedimentary rocks of the western Dom Feliciano Belt in Uruguay: Insights from U–Pb detrital zircon geochronology, Hf and Nd model ages, and geochemical data

Oyhantçabal

Oriolo

Wemmer

et al. 2021

Journal of South American Earth Sciences

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New isotopic and geochemical data for the Paleo-Meso-and Neoproterozoic metasedimentary cover of the southern Dom Feliciano Belt (Brasiliano/Pan-African) are presented and evaluated combined with published information. Whole-rock major and trace element geochemistry indicates that the dominant source for all the units had a composition similar to average upper continental crust. The geochemistry is similar even for late Ediacaran successions with a source component from slightly older Ediacaran granites, due to the crustal origin of these granites. Age constraints based on detrital zircon, fossil content, interbedded volcanic rocks and isotope geochemistry confirm Paleo-, Meso-, and Neoproterozoic successions, despite uncertainties remain in some cases. Detrital zircon data show the dominance of Archean (3.3-2.8 Ga) to Paleoproterozoic (2.2-1.9 Ga), and subordinated Mesoproterozoic (1.5-1.3 and 1.1 Ga) and Neoproterozoic (0.5-0.6 Ga) ages. Lu-Hf zircon and Sm-Nd whole-rock model ages confirm that the Archean and the Paleoproterozoic were the major crustal growth periods for the source areas. U-Pb detrital zircon age distributions and model ages demonstrate that the Nico Pérez Terrane and not the Río de la Plata Craton was the source for most metasedimentary rocks of the western Dom Feliciano Belt. Likewise, comparison of Archean, Paleo-, Meso-and Neoproterozoic events supports that the Nico Pérez Terrane could represent a fragment of the Congo Craton.

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“…Paim et al Idades máximas de deposição (amostras datadas, posicionadas de forma aproximada nos per is), baseadas em: (a) Oliveira et al (2014); e (b) . Localização aproximada das seções mostrada na Fig.…”

unclassified

“…Diagrama de rosetas, com medidas de paleocorrentes, realizadas no rifte Santa Bárbara Oeste. Idades de rochas vulcânicas baseadas em: (1) Jenikian et al (2012); (2) Chemale Jr. (2000); (3) Sommer et al (2005); e (4) Pereira et al (2021).Idades máximas de deposição (amostras datadas, posicionadas de forma aproximada nos per is), baseadas em: (a)Oliveira et al (2014); e (b). Localização aproximada das seções mostrada na Fig.5.…”

unclassified

Crono-correlação entre as Bacias do Camaquã (RS) e do Itajaí (SC): implicações Paleoambientais e Paleogeográfica

Paim¹,

Chemale²,

Lehn³

et al. 2021

Contribuições À Geologia Do Rio Grande Do Sul E De Santa Catarina

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Fotogra ia aeŕea do setor norte da Serra do Segredo, em Caçapava do Sul, RS, onde se destacam a Pedra do Segredo, em primeiro plano, e a Pedra da Abelha, logo à esquerda, geoformas esculpidas sobre conglomerados luviais da Bacia do Camaquã. Ao fundo, alguns cerros formados por rochas metamór icas e o imponente alto de Caçapava, sobre granitoides diversos, rochas que registram diferentes momentos do Ciclo Brasiliano no sul do Brasil. A paisagem faz parte do Geoparque Caçapava Aspirante Unesco e é parcialmente inserida no Parque Natural Municipal da Pedra do Segredo. Imagem obtida por Felipe Guadagnin. Legenda de André Weissheimer de Borba e Felipe Guadagnin.

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U–Pb and Lu–Hf isotopes applied to the evolution of the late to post-orogenic transtensional basins of the dom feliciano belt, Brazil

Cited by 46 publications

References 58 publications

Isotopic study of the Pb-Zn (Cu-Ag) Santa Maria Deposit, Caçapava do Sul Region, Rio Grande do Sul, Brazil

Isotopic study of the Pb-Zn (Cu-Ag) Santa Maria Deposit, Caçapava do Sul Region, Rio Grande do Sul, Brazil

Provenance of metasedimentary rocks of the western Dom Feliciano Belt in Uruguay: Insights from U–Pb detrital zircon geochronology, Hf and Nd model ages, and geochemical data

Crono-correlação entre as Bacias do Camaquã (RS) e do Itajaí (SC): implicações Paleoambientais e Paleogeográfica

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