Geothermobarometry of Granulites of the Juiz De Fora Complex and the Andrelândia Group in the Region of Abre Campo and Manhuaçu, Minas Gerais, Brazil

Júnior, Edgar Batista de Medeiros; Evangelista, Hanna Jordt; Marques, Rodson de Abreu; Velasco, Tamires Costa; Soares, Caroline Cibele Vieira

doi:10.5016/geociencias.v36i3.10943

Cited by 3 publications

(1 citation statement)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Melo et al (2017) obtained for the metamorphic peak of the S-type granite Carlos Chagas batholith (Araçuaí Belt) metamorphic temperature peak of 790 to 820 ºC and pressure of 9.5 to 10.5 kbar and 770 ºC and 6.6 kbar for retrograde metamorphism. Medeiros Junior et al (2017) obtained for metamorphic peak in granulites of Juiz de Fora and Andrelândia group in the region of Abre Campo and Manhuaçu, Minas Gerais, temperature ranging from 748 °C and 870 °C and pressures between 5.7 and 7.5 kbar. Gouvêa et al (2020) estimated for the metamorphic peak of opx bearing metatonalite, related to Rio Doce Arc, temperature about 670 ºC to 860 ºC and pressure from 5.24 to 10.2 kbar.…”

Section: Discussionmentioning

confidence: 99%

Contrasting P-T conditions of Oriental Terrane and Central Superterrane (Ribeira Belt), NW of Rio de Janeiro state, Brazil

et al. 2021

Self Cite

View full text Add to dashboard Cite

Neoproterozoic-Cambrian rocks from the Oriental Terrane and the Central Superterrane of the Ribeira Belt occur in northwest of Rio de Janeiro state. This paper presents new data on field research, petrology, mineral chemistry and conventional geothermobarometry, fundamental to understanding the geology of the region. The metabasic rocks from the Cambuci Domain are associated with the Central Superterrane retroarc basin and record two metamorphic events: M 0 (before the formation of the main foliation, under conditions of 788 °C) and M 1 (contemporary to the main foliation, with peak at 718-752 ºC and 6.62 kbar). The rocks from the Costeiro Domain, interpreted as the Rio Doce arc (Angelim Suite) and the retroarc basin (São Fidélis Goup) of the Oriental Terrane record a metamorphic peak at granulite facies yielding the highest pressure and temperature among the studied domains (752-784 °C and 8.2-9 kbar). The Italva Domain amphibolites represents the retroarc basin of the Oriental Terrane. Temperature and pressure values obtained for the Italva Domain metamorphic peak record 731 ºC and 6.78 kbar, respectively, in the transition zone between upper amphibolite and granulite facies conditions. This work presents the newest record of metamorphic evolution for the Oriental Terrane of the Ribeira Belt, suggesting an anticlockwise P-T-t path and near-isobaric cooling (IBC) for the rocks of the Cambuci Domain. Therefore, these results contribute to the understanding of the evolution of orogenic belts during the amalgamation of the Gondwana in the Neoproterozoic.

show abstract

Section: Discussionmentioning

confidence: 99%

Contrasting P-T conditions of Oriental Terrane and Central Superterrane (Ribeira Belt), NW of Rio de Janeiro state, Brazil

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

The polyphase evolution of the mafic rocks of the Juiz de Fora Complex: The record of two supercontinent cycles

Nunes

Cutts

Heilbron

et al. 2023

Journal of South American Earth Sciences

View full text Add to dashboard Cite

Rhyacian magmatic arc rocks with sanukitoid geochemical signature from the Juiz de Fora Complex, Minas-Bahia Orogenic System (SE-Brazil)

Ferreira

Heilbron²,

Bruno³

et al. 2022

Braz. J. Geol.

Self Cite

View full text Add to dashboard Cite

Sanukitoid rocks make up a complete magmatic series with distinct geochemical characteristics of TTG suites and granitoids from modern magmatic arcs and are regarded as markers of the transition from typically Archean geodynamics to modern plate tectonics. Although most known sanukitoid suites formed during the Neoarchean and Mesoarchean, numerous papers have characterized Paleoproterozoic magmatic arc granitoid rocks showing affinity with the sanukitoid series. This work presents new data from field, lithogeochemistry, zircon U-Pb geochronology, and Sm-Nd and Sr isotopic studies on granodioritic granulites with sanukitoid signatures from the Juiz de Fora Complex ( JFC), one of the Paleoproterozoic tectonic components of the Minas-Bahia Orogenic System (MBOS), southern São Francisco Paleocontinent (southeastern Brazil). These rocks crystallized at ~2175 Ma and present values of εNd t between −4.0 and +0.5, T DM between 2.57 and 2.12 Ga, and 87 Sr/ 86 Sr i between 0.6937 and 0.7137. We interpret these rocks as the result of crystallization of magmas from a hybrid mantle source extensively contaminated by crustal material during protracted subduction. In southeastern São Francisco Paleocontinent, the association of sanukitoid rocks with other magmatic arc rocks points to a complex and prolonged Rhyacian accretionary system similar to modern plate tectonics.

show abstract

Geothermobarometry of Granulites of the Juiz De Fora Complex and the Andrelândia Group in the Region of Abre Campo and Manhuaçu, Minas Gerais, Brazil

Cited by 3 publications

References 12 publications

Contrasting P-T conditions of Oriental Terrane and Central Superterrane (Ribeira Belt), NW of Rio de Janeiro state, Brazil

Contrasting P-T conditions of Oriental Terrane and Central Superterrane (Ribeira Belt), NW of Rio de Janeiro state, Brazil

The polyphase evolution of the mafic rocks of the Juiz de Fora Complex: The record of two supercontinent cycles

Rhyacian magmatic arc rocks with sanukitoid geochemical signature from the Juiz de Fora Complex, Minas-Bahia Orogenic System (SE-Brazil)

Contact Info

Product

Resources

About