Late Tonian within-plate mafic magmatism and Ediacaran partial melting and magmatism in the Costeiro Domain, Central Ribeira Belt, Brazil

Autor(es)

Meira, V. T. ^{[1, 2]} ; Garcia-Casco, A. ^{[3, 4]} ; Juliani, C. ^[5] ; Schorscher, J. H. D. ^[6]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Geociencias, Programa Posgrad Geoquim & Geotecton, Sao Paulo, SP - Brazil

^[2] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Dept Geofis, Sao Paulo, SP - Brazil

^[3] Univ Granada, Fac Ciencias, Dept Mineral & Petrol, Granada - Spain

^[4] Univ Granada, Inst Andaluz Ciencia Tierra, CSIC, Granada - Spain

^[5] Univ Sao Paulo, Inst Geociencias, Dept Geol Sedimentar & Ambiental, Sao Paulo, SP - Brazil

^[6] Univ Sao Paulo, Inst Geociencias, Dept Mineral & Geotecton, Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Precambrian Research; v. 334, NOV 1 2019.
• Citações Web of Science: 0

Resumo

The tectonic evolution of the Ribeira Belt comprises a protracted history involving several magmatic, deformational and metamorphic events mainly associated with the Neoproterozoic Brasiliano Orogenic Cycle. Most tectonic models relate the evolution of the Ribeira Belt to a protracted orogenic history with diachronous accretion of different terranes against larger cratonic blocks. However, recent proposals challenge models of multistage terrane accretions. In this paper we revisit the current tectonic models proposed for the Central Ribeira Belt, based essentially on a large data compilation and new geochemical and geochronological data from samples of the Costeiro Complex. The critical evaluation of these data indicates a long-lasting shared evolution for two geological domains in the Central Ribeira Belt (Embu and Costeiro Domains), usually thought to be different terranes accreted during the late Ediacaran. The first report of late Tonian within-plate tholeiitic to alkaline mafic magmatism and the late Cryogenian-early Ediacaran metamorphism in the Costeiro Complex support the interpretation of shared evolution on both Embu and Costeiro Domains, challenging the current models of diachronous accretion of terranes during the late Ediacaran in the Central Ribeira Belt. (AU)

• Processo FAPESP: 12/15462-7 - As orogenias neoproterozóicas nos domínios São Roque / Serra do Itaberaba, Embu e Costeiro e a evolução crustal e tectônica do Sudeste do estado de São Paulo
• Beneficiário: Caetano Juliani
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 16/06114-6 - O Sistema Terra e a evolução da vida durante o Neoproterozoico
• Beneficiário: Ricardo Ivan Ferreira da Trindade
• Modalidade de apoio: Auxílio à Pesquisa - Temático