Granulite accretion to Rio de la Plata Craton, based on zircon U-Pb-Hf isotopes: Tectonic implications for Columbia Supercontinent reconstruction

Girelli, Tiago Jonatan; Chemale, Farid; Lavina, Ernesto Luiz Corrêa; Laux, Jorge Henrique; Bongiolo, Everton Marques; Lana, Cristiano

doi:10.1016/j.gr.2017.12.010

Cited by 40 publications

(12 citation statements)

References 70 publications

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“…The Rhyacian/Orosirian evolution can be correlated with the Camboriú (Da Silva et al, 2005) and Santa Maria Chico complexes (Tickyj et al, 2004;Girelli et al, 2018), as both reported the ages mentioned above. Girelli et al (2018) pointed out that the granulite facies metamorphic event at ~2.06 Ga was at the onset of multi-accretional terranes' amalgamation against the Rio de la Plata Craton (RPC).…”

Section: Rhyacian / Orosirian Evolution Based On the Th-u-pb Systemmentioning

confidence: 56%

“…2.1 Ga) and granulitic metamorphism (ca. 2.08 Ga) are widespread (Tickyj et al, 2004;Oyhantçabal et al, 2012;Girelli et al, 2018), these events are not recorded in the Pavas Block. An age lull characterises the Siderian to Rhyacian period at this setting (Fig.…”

Section: The Orosirian Melting and Metamorphic Overprintmentioning

confidence: 91%

“…2.2-2.1 Ga followed by high-grade metamorphism associated with crustal anatexis at ca. 2.1-2.0 Ga (Oyhantçabal et al, 2012;Oriolo et al, 2016a;Girelli et al, 2018). This first amalgamation underwent a polyphase deformation during the collision between the Kalahari and the Congo-Rio de la Plata plates in the interval 650-600 Ma (Fernandes et al, 1992;Oriolo et al, 2016a;Hueck et al, 2018).…”

Section: Geotectonic Evolutionmentioning

confidence: 96%

“…The Pavas Block's extension is of principal interest due to the suspicion of a terrane accretion model to test a theory presented in some recent works (Rapela et al, 2011;Girelli et al, 2018). The whole NPT was initially interpreted as a Neoproterozoic tectonostratigraphic "suspected" terrane separated through ductile shear zones (Bossi and Gaucher, 2004).…”

Section: Introductionmentioning

confidence: 99%

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The Archean Pavas Block in Uruguay: Extension and tectonic evolution based on LA-ICP-MS U–Pb ages and airborne geophysics

Masquelin

Aı̈fa

Scaglia

et al. 2021

Journal of South American Earth Sciences

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Section: Rhyacian / Orosirian Evolution Based On the Th-u-pb Systemmentioning

confidence: 56%

Section: The Orosirian Melting and Metamorphic Overprintmentioning

confidence: 91%

Section: Geotectonic Evolutionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Archean Pavas Block in Uruguay: Extension and tectonic evolution based on LA-ICP-MS U–Pb ages and airborne geophysics

Masquelin

Aı̈fa

Scaglia

et al. 2021

Journal of South American Earth Sciences

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“…To the east, the Dom Feliciano Belt is the main unit, divided into three major domains: western, central, and eastern (Figure 1a). These units are delimited by large‐scale geophysical discontinuities (Basei et al, 2018; Costa, 1997; Fernandes et al, 1995a,b; Girelli et al, 2018; Hartmann, Lopes, & Savian, 2016; Hueck, Oyhantçabal, Philipp, Basei, & Siegesmund, 2018; Philipp, Pimentel, & Chemale, 2016; Saalmann et al, 2011).…”

Section: Geological Settingmentioning

confidence: 99%

Capão do Leão Granite: Highly differentiated garnet‐bearing magmatism in the southeastern Dom Feliciano Belt, Brazil

et al. 2020

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The Capão do Leão Granite (CLG; 583 ± 3 Ma) occurs as two NE‐oriented bodies, near the namesake city and Pedro Osório, Rio Grande do Sul, Brazil. The CLG is linked to the voluminous Ediacaran magmatism in the SE Dom Feliciano Belt (Pelotas Batholith), intruded in post‐collisional settings in the set of the non‐deformed younger plutons in the area. This work presents field characterization, petrography, mineral chemistry and whole‐rock geochemical affinities for the CLG. This granite exhibits miarolitic cavities, suggesting an epizonal emplacement, as well as mafic enclaves, which may represent source material, while mylonitic and S–C foliations are localized and post‐magmatic. The analysed samples are massive, leucocratic, coarse‐ to medium‐grained hypidiomorphic alkali‐feldspar granites composed of quartz, orthoclase (Or89–98), albite (An1–10), oligoclase (An11–16), garnet (Sps31–64 and Alm24–56), siderophyllite/annite, muscovite and Fe‐chlorite (secondary), apatite, epidote/zoisite, zircon, and opaques. The dispersion in mineral compositions in each occurrence and between them suggest different magmatic evolutionary trends. The diverse textures, zoning patterns and chemistry in garnet indicate both equilibrium with highly evolved Al2O3‐rich liquids, as well as a xenocrystic/restitic origin. The geochemistry shows subalkaline, high‐K, and metaluminous to weakly peraluminous fingerprints. Samples are commonly enriched in Rb, Th, U, Pb, Nd, and Sm, and depleted in Ba, Sr, Eu, Nb, P, Zr and Ti, due to advanced fractional crystallization. The classification of the CLG into some traditional chemical patterns is difficult, due to the high differentiation and the overlap of petrologic processes, although its derivation from I‐type liquids is proposed. The dispersion both in mineral and whole‐rock chemistry indicates different evolutionary trends for the CLG, where fractionation coupled with crustal recycling by assimilation/contamination processes were responsible for the granite differentiation.

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Tonian and Cryogenian ⁴⁰Ar/³⁹Ar hornblende and muscovite ages for the São Gabriel Terrane, Dom Feliciano Belt, southern Brazil

et al. 2021

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Belt, Brazil, associated with previous structural geology and geochronology studies, allow for a better understanding of Neoproterozoic events in this region. The Sanga da Cachoeira Complex and metasedimentary rocks of Arroio Marmeleiro Complex (U-Pb provenance age > 1.5 Ga) show 40 Ar/ 39 Ar spectra with no successful plateau age, attributed to the alteration or excess 40 Ar. Tonian (ca. 729 ± 9 Ma) 40 Ar/ 39 Ar hornblende age of metadiorites of the Cambaí Complex (U-Pb protolith age ca. 750 Ma) is interpreted to register the age of an early structure in this unit, where hornblende is a mineral of the composite banding fabric formed by remnants of original bedding, locally preserved, and added by metamorphic recrystallization. A cooling rate of at least 5 C/Ma is suggested for the Cambaí Complex, from its crystallization to its metamorphic event. The Cryogenian (<690 ± 8 Ma) 40 Ar/ 39 Ar hornblende and muscovite ages belonging to the Imbicuí Complex (protolith age ca. 869 Ma) whose ages are related to the late structure formed by a short and intense activity of the Cerro Branco Shear Zone, which experienced a rapid cooling of 12 C/Ma. The ages from the rocks belonging to such a diverse tectonic setting, including continental and intraoceanic island arc, oceanic crust low-K amphibolites and meta-harzburgites, and metasediments, presenting similar nature and fabric orientation, indicate that major tectonic-magmatic-metamorphic activity was responsible for the accretion of these lithotectonic units that gave rise to the São Gabriel Terrane in southern Brazil.

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Granulite accretion to Rio de la Plata Craton, based on zircon U-Pb-Hf isotopes: Tectonic implications for Columbia Supercontinent reconstruction

Cited by 40 publications

References 70 publications

The Archean Pavas Block in Uruguay: Extension and tectonic evolution based on LA-ICP-MS U–Pb ages and airborne geophysics

The Archean Pavas Block in Uruguay: Extension and tectonic evolution based on LA-ICP-MS U–Pb ages and airborne geophysics

Capão do Leão Granite: Highly differentiated garnet‐bearing magmatism in the southeastern Dom Feliciano Belt, Brazil

Tonian and Cryogenian ⁴⁰Ar/³⁹Ar hornblende and muscovite ages for the São Gabriel Terrane, Dom Feliciano Belt, southern Brazil

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Granulite accretion to Rio de la Plata Craton, based on zircon U-Pb-Hf isotopes: Tectonic implications for Columbia Supercontinent reconstruction

Cited by 40 publications

References 70 publications

The Archean Pavas Block in Uruguay: Extension and tectonic evolution based on LA-ICP-MS U–Pb ages and airborne geophysics

The Archean Pavas Block in Uruguay: Extension and tectonic evolution based on LA-ICP-MS U–Pb ages and airborne geophysics

Capão do Leão Granite: Highly differentiated garnet‐bearing magmatism in the southeastern Dom Feliciano Belt, Brazil

Tonian and Cryogenian 40Ar/39Ar hornblende and muscovite ages for the São Gabriel Terrane, Dom Feliciano Belt, southern Brazil

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Tonian and Cryogenian ⁴⁰Ar/³⁹Ar hornblende and muscovite ages for the São Gabriel Terrane, Dom Feliciano Belt, southern Brazil