U-Pb geochronology of the 2.0 Ga Itapecerica graphite-rich supracrustal succession in the São Francisco Craton: Tectonic matches with the North China Craton and paleogeographic inferences

Teixeira, Wilson; Oliveira, Elson P.; Peng, Peng; Dantas, Elton Luiz; Hollanda, Maria Helena Bezerra Maia de

doi:10.1016/j.precamres.2017.02.021

Cited by 57 publications

(10 citation statements)

References 95 publications

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“…Occurrences of graphite with δ 13 C between -21.23 and -27.89‰, indicating biogenic origin, (Miranda et al 2019) are reported in this area, where Itapecerica Supracrustal Sequence has been described (Campello et al 2015, Chaves et al 2015, Teixeira et al 2017. The studied area is located near the city of Formiga, where the graphite schist occurs between the Divinópolis and Campo Belo complexes (Fig.…”

Section: Geological Settingmentioning

confidence: 73%

Origin and metamorphism of graphite from Formiga, Minas Gerais (Brazil)

2021

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During the Paleoproterozoic Era, the Brazilian cratons experienced orogenic events that modified the archean basement and sedimentary successions. In the southern São Francisco Craton, it can be recognized evidence of an orogenic event that happened between Rhyacian and Orosirian periods. It is related to the closure of an oceanic basin at this time, which led to the collision between the Archean Divinópolis and Campo Belo metamorphic complexes. Graphite schist occurs close to the cities of Formiga and Itapecerica (Minas Gerais), located between these complexes. To contribute to the understanding of the origin and metamorphism of the graphite from Formiga, petrographic studies, X-ray diffraction (XRD) and Raman spectroscopy analyses have been done. XRD and Raman methods revealed that the temperatures recorded by graphite are around 460°C. However, Raman data showed that the crystallite sizes correspond to higher metamorphic grade conditions (amphibolite to granulite facies). Temperatures of 460°C are probably associated with hydrothermal processes along faults in post-collisional stage. The presence of todorokite, a mineral typical of deep-sea Mn nodules formed by microorganisms, in association with graphite from Formiga, suggests a biogenic origin for the graphite occurrence.

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Section: Geological Settingmentioning

confidence: 73%

Origin and metamorphism of graphite from Formiga, Minas Gerais (Brazil)

2021

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“…Recent paleotectonic models quoting the Statherian anorogenic magmatism suggest a paleocontinental link between the São Francisco and North China cratons (Peng 2015, Cederberg et al 2016, Teixeira et al 2017Xu et al 2017). These authors point to similarities between the Pará de Minas dyke swarm, located in the southern tip of the São Francisco craton, and the magmatism related to the Xiong'er-Taihang LIP event, both interpreted as related to Statherian intracontinental setting (Fig.…”

Section: Paleotectonic Constrains For the São Francisco-congo Paleocomentioning

confidence: 96%

“…1B), the Guanhães block stands out as a portion of the São Francisco paleocontinental region reworked within the Araçuaí Neoproterozoic orogen (Alkmim et al 2006, Noce et al 2007a, 2016. The Guanhães block encompasses Archean TTG migmatitic gneisses and associated granites, locally covered by Siderian to Neoproterozoic supracrustal successions, as well as a voluminous Statherian granitic intrusions and meta-ultramafic and meta-mafic rocks of unknown age (Noce et al 2007a, Teixeira et al 2017. Zircon U-Pb (SHRIMP) ages between 3150 Ma and 2710 Ma constrain the magmatic crystallization of both gneiss protoliths and granitoids that also show local metamorphic overprints around 2000 Ma and 570-500 Ma , 2016, Peixoto et al 2015, Barrote 2016.…”

Section: Geological Settingmentioning

confidence: 99%

“…Alternatively, there are models picturing the São Francisco-Congo block within the Columbia supercontinent (e.g., Rogers and Santosh 2002, Hou et al 2008, Teixeira et al 2017. Hou et al (2008) envisaged a continuous subduction-related magmatic belt bordering Columbia that was amalgamated by orogenic systems developed from ca.…”

Section: Paleotectonic Constrains For the São Francisco-congo Paleocomentioning

confidence: 99%

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First Lu-Hf, δ18O and trace elements in zircon signatures from the Statherian Espinhaço anorogenic province (Eastern Brazil): geotectonic implications of a silicic large igneous province

et al. 2018

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The Espinhaço rift system encompasses taphrogenetic events from the Statherian to Tonian in the São Francisco-Congo (SFC) paleocontinent. The magmatism is represented mainly by metamorphosed anorogenic granites and rhyolites with subordinate amphibolites. Zircon U-Pb (LA-ICPMS and SHRIMP) ages from felsic (1748 ± 3 Ma and 1740 ± 8 Ma) and mafic (1725 ± 4 Ma) rock samples, coupled with previous studies suggest that the Espinhaço igneous province erupted from ca. 1.79 Ga to ca. 1.70 Ga. The felsic rocks show characteristics of A-type magmas. The negative εHf(t) data for meta-rhyolite zircons (-12.32 to -17.58), the moderate δ 18 O values (7.02 to 7.98) and the REE patterns suggest crustal melting related to an extensional environment. The mafic rock shows negative values of εHf(t) in zircons (-4.05 to -8.25) and moderate δ 18 O values (5.56 to 7.87). The results disclose a basaltic magmatism in continental intraplate setting whose parental magma could have been derived from the subcontinental lithospheric mantle with contamination of crustal material. These data coupled with coeval Espinhaço magmatism and mafic dyke swarms found to the south of the Espinhaço rift system reinforce the evidence of a long-lived Statherian silicic large igneous province (SLIP) on the SFC paleocontinental block.

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“…Ávila et al, 2010, and present four different orogenic groups, based on isotopic and geochemical data, such as 2. 47-2.41, 2.36-2.33, 2.23-2.20 and 2.17-2.09 Ga (Teixeira et al, 2017). The formation of these rocks is related to a long-term magmatic accretion, associated with oceanic subduction slab (Noce et al, 2000).…”

Section: Ii1 Mineiro Beltmentioning

confidence: 98%

Metamorfismo e tectônica da região de Alfenas-Areado-Alterosa, MG: contribuições da termobarometria e datação da Unidade Granito-Migmatito Areado

Julião¹

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The period of this research has been one of the most challenging of all my life. It's already started with a depression diagnosis, then lots of changes in my personal life that became big obstacles to face, like moving twice, working 60 hours per week, and dealing with isolation caused by the pandemic were some of those challenges, and with that, the acknowledgments turns an important part of this dissertation to thank everyone that helped me to achieve this goal.First, I would like to thank my tutor, Renato de Moraes, for all the patience and empathy with my situation and all the assist to make the article become a reality. I am really grateful for all the assistance you gave along all these years, which I believe wasn't easy since my learning process is slow. I would like to thank the other co-authors of the article, Frederico Meira Faleiros, Rafael Gonçalves da Motta, Francy Roxana do Valle and Leonardo Brenguere Leão Lopes for their contribution to the research. I also acknowledge the contribution of José Vinícius Martins and Sandra Andrade from NAP Geoanalítica for their assistance with LA-ICP-MS analysis. We also appreciated the aid from Kei Sato on the SHRIMP proceedings; without your help, many analytical problems would have happened.I express my gratitude to my parents, Sonia Maria Lopes and Anezio Julião, for all their support, especially after I decided to leave my job to take care of my mental health. And in that sense, I would also like to thank Ana Lidia Jacintho Delgado for being my company in both bright and dark times, you have entered my life in my worst moment and I can only thank you for staying by my side this whole time.I would like to thank the true friends who have welcomed me even after my breakdown.To my friends since high school and who are on my side until now, Caio Emmerick (and Thais Emmerick, which were not from school, but fits entirely in this group), Nathalie Zago, Renata Roitman, and Yorran Lee. To the Mocó Research Group, which is composed of Lucas Martins

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U-Pb geochronology of the 2.0 Ga Itapecerica graphite-rich supracrustal succession in the São Francisco Craton: Tectonic matches with the North China Craton and paleogeographic inferences

Cited by 57 publications

References 95 publications

Origin and metamorphism of graphite from Formiga, Minas Gerais (Brazil)

Origin and metamorphism of graphite from Formiga, Minas Gerais (Brazil)

First Lu-Hf, δ18O and trace elements in zircon signatures from the Statherian Espinhaço anorogenic province (Eastern Brazil): geotectonic implications of a silicic large igneous province

Metamorfismo e tectônica da região de Alfenas-Areado-Alterosa, MG: contribuições da termobarometria e datação da Unidade Granito-Migmatito Areado

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