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dc.contributor.authorCavalcante, Carolina
dc.contributor.authorMeira, Vinicius T.
dc.contributor.authorMagalhães, Nivea
dc.contributor.authorHollanda, Maria Helena B.M.
dc.contributor.authorOliveira, Eurídice
dc.date.accessioned2021-10-19T12:43:23Z
dc.date.available2021-10-19T12:43:23Z
dc.date.issued2021-09-13
dc.description.abstractThe orogenic evolution of the hot Araçuaí belt is characterized by continuous magmatic activity, with magmas of different compositions recording a long-lived (∼630 to ∼530 Ma) tectono-thermal evolution in response to convergence between the Congo and São Francisco continents during the West Gondwana amalgamation. Geochemical data from the Carlos Chagas domain (CCD) and the Nova Venécia Complex (NVC), in the hinterland of this belt, show that these rocks contain high amounts of heat producing elements – HPEs – (Th, U, and K) and have a dominant peraluminous signature, suggesting that they result from partial melting of continental crust. The CCD is intruded by post-collisional charnockites that have a dominant shoshonitic signature, interpreted as representing magmas from an enriched mantle reservoir with a variable amount of crustal contamination. Detailed morphological investigations at the macro- and micro-scales show that the CCD contains remnants of residuum material from metamorphic reactions associated with textures that attest to melt crystallization. This reinforces the interpretation that the CCD is locally derived, i.e., it represents an in-source subhorizontal rheologically weak layer of migmatites and parauthoctonous granites that formed during the orogenic thickening. The CCD likely triggered the formation of an orogenic plateau and a geological setting in which high temperature conditions could be sustained for tens of millions of years. In such a setting, continuous heat supply from radiogenic decay might have been the main heat source for the compositionally diverse magmatism during most of the orogenic evolution of the Araçuaí belt.en_US
dc.identifier.citationCavalcante GCG, Meira VT, Magalhães, Hollanda, Oliveira. The role of Ediacaran synkinematic anatectic rocks and the late-orogenic charnockitic rocks in the development of the hot Araçuaí belt. Precambrian Research. 2021;365en_US
dc.identifier.cristinIDFRIDAID 1946309
dc.identifier.doi10.1016/j.precamres.2021.106396
dc.identifier.issn0301-9268
dc.identifier.issn1872-7433
dc.identifier.urihttps://hdl.handle.net/10037/22788
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.journalPrecambrian Research
dc.relation.projectIDAndre: 2010/03537-7 and BEX 4190/11-4 to CC, 404767/2016-8 to VTM aen_US
dc.relation.projectIDAndre: CAPESen_US
dc.relation.projectIDAndre: FAPESPen_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holder© 2021 Elsevier B.V. All rights reserved.en_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450en_US
dc.titleThe role of Ediacaran synkinematic anatectic rocks and the late-orogenic charnockitic rocks in the development of the hot Araçuaí belten_US
dc.type.versionacceptedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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