Please use this identifier to cite or link to this item: http://www.repositorio.ufop.br/handle/123456789/1957
Title: Unravelling a Proterozoic basin history through detrital zircon geochronology : the case of the Espinhaço Supergroup, Minas Gerais, Brazil.
Authors: Chemale Júnior, Farid
Dussin, Ivo Antonio
Alkmim, Fernando Flecha de
Martins, Maximiliano de Souza
Queiroga, Gláucia Nascimento
Armstrong, Richard
Santos, Marcelo Nascimento dos
Keywords: Stenian
Rodinia
São Francisco Craton
U-Pb zircon geochronology
Espinhaço Basin
Issue Date: 2012
Citation: CHEMALE JUNIOR, F. et al. Unravelling a Proterozoic basin history through detrital zircon geochronology : the case of the Espinhaço Supergroup, Minas Gerais, Brazil. Gondwana Research, v. 22, n. 1, p. 200-206, jul. 2012. Disponível em: <https://www.sciencedirect.com/science/article/pii/S1342937X11002553>. Acesso em: 03 dez. 2012.
Abstract: New U–Pb in situ zircon dating provides a new approach for the study of the Espinhaço Supergroup units exposed in the São Francisco Craton and Araçuaí Orogen. Located in Southern Espinhaço, Minas Gerais, the following two basins were formed in intraplate conditions: (i) the Lower Espinhaço Basin is marked by a volcano-sedimentary sequence with alluvial, fluvial and eolian deposits that were formed from 1.68 Ga to 1.80 Ga; (ii) the overlying sequence, called the Upper Espinhaço Basin, is a rift-sag basin that presents basal diamond-bearing continental deposits (the Sopa–Brumadinho Formation) with a younger zircon peak at 1192 Ma, which is the maximum age for deposition of the upper units. The obtained U–Pb detrital zircon data of the studied units show age groupings related to the orogenic cycles of Jequié (Neoarchean) and Transamazonian (Paleoproterozoic), which are associated with the stability period from 1.8 Ga to 0.91 Ga in the São Franscico Craton, and record deposition during at least the three basinal cycles. The Stenian–Tonian ages of the Upper Espinhaço Basin units (906 Ma to 1192 Ma) suggest a direct link with the evolution of the Rodinia Supercontinent and represent a marker for Mesoproterozoic to Early Neoproterozoic evolution in the São Franscico Craton and adjacent areas.
URI: http://www.repositorio.ufop.br/handle/123456789/1957
ISSN: 1342937X
metadata.dc.rights.license: O periódico Gondwana Research concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3315440161240.
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