Differential exhumation of cratonic and non-cratonic lithosphere revealed by apatite fission-track thermochronology along the edge of the São Francisco craton, eastern Brazil [PDF]
Scientific Reports, 2022 Lithosphere of cratons and orogens generally reacts differently to tectonic events. Although these differences are mostly clear during the orogenic phases, understanding how they respond to tectonic reactivation is still challenging.
Ana Fonseca +4 more
doaj +3 more sources
Decratonization by rifting enables orogenic reworking and transcurrent dispersal of old terranes in NE Brazil [PDF]
Scientific Reports, 2021 Dispersion and deformation of cratonic fragments within orogens require weakening of the craton margins in a process of decratonization. The orogenic Borborema Province, in NE Brazil, is one of several Brasiliano/Pan-African late Neoproterozoic orogens ...
Carlos E. Ganade +5 more
doaj +2 more sources
Late Cryogenian and late Paleozoic ice ages on the São Francisco craton, east Brazil
Frontiers in Earth Science, 2022 The miniature paleocontinent in the region of the São Francisco River valley, in eastern Brazil, holds the record of two different glacial epochs. The late Cryogenian Jequitaí Formation from the Bambuí Group is up to 100 m thick and covers areas mainly ...
Gabriel J. Uhlein, Alexandre Uhlein
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Transpressive dextral shear in the Italva-Itaperuna section, Northern State of Rio de Janeiro, Brazil [PDF]
Anais da Academia Brasileira de Ciências, 2008 Structural analysis carried out on a segment of the Neoproterozoic Ribeira Belt, southeastern Brazil, show that it represents part of the transpressive dextral orogen related to the Central Mantiqueira Province.
Tiago R. Karniol +2 more
doaj +4 more sources
Intraplate deformation of Gondwana terranes and implications for the Wilson Cycle [PDF]
Scientific ReportsThe Wilson Cycle, a cornerstone of plate tectonic theory, describes the cyclical evolution of ocean basins from rifting and spreading to closure via subduction and continental collision and assembly.
Ana Fonseca, Johan De Grave
doaj +2 more sources
Proveniência e Idade do Metamorfismo das Rochas da Faixa Brasília, na Região de Tapira (SW de Minas Gerais) [PDF]
Geologia USP. Série Científica, 2006 A Faixa Brasília na região de Tapira, no SW do estado de Minas Gerais, exibe quatro domínios litotectônicos diferentes,imbricados através de falhas de empurrão, com vergência para o Cráton do São Francisco.
Carlos Humberto da Silva +3 more
doaj +3 more sources
Estudo geoquímico e petrológico dos diques máficos da Região de Candeias-Campo Belo-Santo Antônio do Amparo (MG), porção meridional do Craton São Francisco [PDF]
Geologia USP. Série Científica, 2006 No Complexo Metamórfico Campo Belo, sul de Minas Gerais, ocorrem diques máficos divididos em quatro grupos em função de aspectos petrográficos, geoquímicos e tectônicos: Anfibolitos A1, Anfibolitos A2, Gabronoritos e Gabros. A grande maioria das amostras
Paulo César Corrêa da Costa +6 more
doaj +2 more sources
Caracterização geotérmica da crosta superior da Bacia Hidrográfica do Submédio São Francisco
Geosul, 2022 A região da porção norte do Cráton São Francisco e parte sul da Província Borborema, onde está localizada a Bacia Hidrográfica do Submédio São Francisco, apresenta alterações geotectônicas devido aos processos colisionais sofridos em suas formações ...
Juliana de Oliveira Batista +2 more
doaj +1 more source
A new limit for the NW Río de la Plata Craton Border at about 24°S (Argentina) detected by Magnetotellurics [PDF]
, 2015 Old South American structures constitute a puzzle where the Río de la Plata Craton is the most important clue in the assembly of SW Gondwana. The present study is aimed at characterizing the western border of the Río de la Plata Craton on the basis of ...
Barcelona, Hernan +4 more
core +6 more sources
Multi-method characterization of rare blue quartz-bearing metavolcanic rocks of the Rio dos Remédios Group, Paramirim Aulacogen, NE Brazil [PDF]
Brazilian Journal of Geology, 2023 The Rio dos Remédios Group comprises a supracrustal sequence that occupies the base of the Espinhaço Supergroup, São Francisco Craton, Brazil. Its basal formation, Novo Horizonte, crops out in the Paramirim region mainly as metavolcanic rocks that ...
Danielle Cruz da Silva +4 more
doaj +1 more source