Título:	Arc accretion and crustal reworking from late Archean to Neoproterozoic in Northeast Brazil
Autor(es):	Ferreira, Alanielson da Câmara Dantas Dantas, Elton Luiz Fuck, Reinhardt Adolfo Nedel, Ingrid Moerschberger
ORCID:	https://orcid.org/0000-0001-8054-0047
Afiliação do autor:	Universidade de Brasília, Instituto de Geociências Universidade de Brasília, Instituto de Geociências Universidade de Brasília, Instituto de Geociências Universidade de Brasília, Instituto de Geociências
Assunto:	Crosta continental Brasil, Nordeste
Data de publicação:	12-Mai-2000
Editora:	Springer Nature
Referência:	FERREIRA, Alanielson C. D. et al. Arc accretion and crustal reworking from late Archean to Neoproterozoic in Northeast Brazil. Scientific Reports, [S. l.], v. 10, art. n. 7855, 2020. DOI: https://doi.org/10.1038/s41598-020-64688-9. Disponível em: https://www.nature.com/articles/s41598-020-64688-9. Acesso em: 05 fev. 2024.
Abstract:	New systematic Nd isotope and U-Pb geochronology data were applied to Precambrian rocks of northeastern Brazil to produce a crustal-age distribution map for a small basement inlier (1,500 km2). The results support episodic crustal growth with fve short periods of crustal formation at ca. 2.9 Ga, 2.65 Ga, 2.25 Ga, 2.0 Ga, and 0.6 Ga. Based on the frequency histogram of U-Pb zircon ages and Nd isotopic data, we suggest that about 60% of the continental crust was formed during the Archean between 2.9 Ga and 2.65 Ga. The remaining 40% of crust was generated during the Rhyacian to Neoproterozoic (~2.0–0.6 Ga). This overall continental growth is manifested by accretionary processes that involved successive accretions surrounding an older core, becoming younger toward the margin. Strikingly, this repetitive history of terrane accretion show a change from lithospheric peeling dominated accretionary setting during the late Archean to a more, modern-day akin style of arc accretion during the Proterozoic. Similar tectonic processes are observed only in large continental areas (>1,000,000 km2) as in the North American continent basement and in the Amazonian Craton.
Licença:	(CC BY) Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Cre ative Commons license, and indicate if changes were made. Te images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not per mitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. © Te Author(s) 2020.
DOI:	https://doi.org/10.1038/s41598-020-64688-9
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