Precambrian Drift History and Paleogeography of Congo-São Francisco craton

 

Autores: 
Trindade, R.I.F.
D’Agrella-Filho, M.S.
Antonio, P.Y.J.
Teixeira, W.
Informações Gerais
Departamento: 
geofisica
Título do Livro: 
Ancient Supercontinents and the Paleogeography of the Earth
Ano de Publicação: 
2021
Número de Volumes: 
1
Página Inicial: 
445
Página Final: 
464
Edição: 
1
Editora: 
Elsevier - https://doi.org/10.1016/B978-0-12-818533-9.00016-3
Palavras-chave: 
Congo−São Francisco, paleomagnetism, paleogeography, Precambrian, Columbia, Rodinia, Gondwana
localidade: 
Publicação Internacional

Congo and São Francisco cratons are made of several Archean and Paleoproterozoic nuclei welded together by Paleoproterozoic belts. The pair is considered to be a stable lithospheric entity by ~2.0 Ga and hosts fissural mafic magmatism at 2.7–2.6, 1.71, 1.50, and 0.92 Ga; magmatic events at 1.38 and 1.10 Ga are restricted to Africa. Some of these dike swarms and also younger sedimentary units have been targeted for paleomagnetic studies, but the paleomagnetic data for the Congo−São Francisco craton is still scarce. Here we review the available data for both cratons. A total of 21 paleomagnetic poles was selected for paleogeographic reconstructions, 11 of them with Q-index higher than 4. Segments of apparent wander paths were drawn for 1.1–0.92, 0.79–0.74, and 0.57–0.52 Ga. Tentative reconstructions are proposed to place Congo−São Francisco into the context of supercontinents Columbia, Rodinia, and Gondwana.