Metamorphic imprints on units of the southern Araçuaí belt, SE Brazil: The history of superimposed Transamazonian and Brasiliano orogenesis

Cutts, Kathryn; Lana, Cristiano; Alkmim, Fernando Flecha de; Peres, Guilherme Gravina

doi:10.1016/j.gr.2018.02.016

Cited by 29 publications

(27 citation statements)

References 68 publications

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“…More recently, Cutts et al (2018) demonstrated a strong Brasiliano overprint at 580-590 Ma on Mantiqueira Complex and Dom Silvério Group. This group outcrops East of Piranga region.…”

Section: Metamorphic Ages and Tectonic Implicationsmentioning

confidence: 99%

“…1). Aguilar et al (2017) and Cutts et al (2018) obtained Paleoproterozoic ages for monazite, titanite, and zircon grains for basement and supracrustal rocks, suggesting a Rhyacian-Orosirian overprint (Fig. 1).…”

Section: Introductionmentioning

confidence: 98%

“…1), Brazil, fringed to the East by the Neoproterozoic Araçuaí Orogen and to the South by the Paleoproterozoic Mineiro Belt. The Paleoproterozoic history of QF witnessed the convergence of distinct groups of arcs and microcontinents (Noce et al 2007, Barbosa & Sabaté 2004, Aguilar et al 2017, Cutts et al 2018. The Rhyacian-Orosirian Orogeny (ca.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, QF was also tectonically overprinted in parts by the Brasiliano tectonic event (ca. 630-490 Ma) (Pedrosa-Soares et al 2007, Alkmim & Teixeira 2017, Aguilar et al 2017, Cutts et al 2018.…”

Section: Introductionmentioning

confidence: 99%

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Pseudosection modeling and U-Pb geochronology on Piranga schists: role of Brasiliano Orogeny in the Southeastern Quadrilátero Ferrífero, Minas Gerais, Brazil

et al. 2019

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In the Southeastern Quadrilátero Ferrífero, a package of metapelitic rocks previously attributed to the Archean Rio das Velhas Supergroup crops out in Piranga locality. This study presents the mineral chemistry and U-Pb-Hf zircon geochronology on foliated staurolite-garnet mica schists. Garnet and staurolite index minerals are syn-to post-kinematic towards the main schistosity. Garnet porphyroblasts display well-developed compositional zoning of Mg-Fe-Mn-Ca, with increase of almandine and pyrope and decrease of spessartine towards the rim, implying in prograde metamorphic pattern. Estimates of P-T values for the metamorphic peak resulted in temperatures between 630 to 650ºC and pressure around 7 kbar. Pseudosections show well-defined stability fields in amphibolite facies, with a metamorphic path displaying progressive increase in P-T conditions. Maximum depositional age of 1,875 ± 51 Ma is established for the Piranga mica schists pointing to a depositional history that is younger than those previously described. Metamorphic Cambrian ages characterize the strong influence of deformational processes related to the final stages of Brasiliano Orogeny in the Southeastern Quadrilátero Ferrífero.

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“…More recently, Cutts et al (2018) demonstrated a strong Brasiliano overprint at 580-590 Ma on Mantiqueira Complex and Dom Silvério Group. This group outcrops East of Piranga region.…”

Section: Metamorphic Ages and Tectonic Implicationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Pseudosection modeling and U-Pb geochronology on Piranga schists: role of Brasiliano Orogeny in the Southeastern Quadrilátero Ferrífero, Minas Gerais, Brazil

et al. 2019

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“…, the Rhyacian-Orosirian Transamazonian orogeny that affected all of these units as well as the São Francisco cratonic basement (Alkmim and Marshak, 1998;Aguilar et al, 2017;Alkmim and Teixeira, 2017;Carvalho et al, 2017;Cutts et al, 2018;, followed by the Brasiliano event at 600-490 Ma, which reactivated already existent structures, making it difficult to determine the timing and significance of earlier events (Chemale et al, 1994;Alkmim and Marshak, 1998;;Brueckner et al, 2000;Noce et al, 2007;Heilbron et al 2010;Aguilar et al, 2017;Cutts et al, 2018). These three units, the Mineiro Belt (MB), Mantiqueira Complex (MC) and Juiz de Fora Complex (JFC), are all considered to be fragments of the Palaeoproterozoic orogeny (Transamazonian orogeny), which also resulted in the inversion and closure of the Minas Basin.…”

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confidence: 99%

Zircon U-Pb and Lu-Hf record from high-grade complexes within the Mantiqueira Complex: First evidence of juvenile crustal input at 2.4–2.2 Ga and implications for the Palaeoproterozoic evolution of the São Francisco Craton

Cutts

Lana

Moreira

et al. 2020

Precambrian Research

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Significance of age periodicity in the continental crust record: The São Francisco Craton and adjacent Neoproterozoic orogens as a case study

2020

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Metamorphic imprints on units of the southern Araçuaí belt, SE Brazil: The history of superimposed Transamazonian and Brasiliano orogenesis

Cited by 29 publications

References 68 publications

Pseudosection modeling and U-Pb geochronology on Piranga schists: role of Brasiliano Orogeny in the Southeastern Quadrilátero Ferrífero, Minas Gerais, Brazil

Pseudosection modeling and U-Pb geochronology on Piranga schists: role of Brasiliano Orogeny in the Southeastern Quadrilátero Ferrífero, Minas Gerais, Brazil

Zircon U-Pb and Lu-Hf record from high-grade complexes within the Mantiqueira Complex: First evidence of juvenile crustal input at 2.4–2.2 Ga and implications for the Palaeoproterozoic evolution of the São Francisco Craton

Significance of age periodicity in the continental crust record: The São Francisco Craton and adjacent Neoproterozoic orogens as a case study

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