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The Amazonian Craton and the supercontinent Columbia: paleogeographic implications based on the paleomagnetic study of Paleo-mesoproterozoic geological units

Grant number: 12/50327-3
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): August 01, 2012
Effective date (End): July 31, 2015
Field of knowledge:Physical Sciences and Mathematics - Geosciences - Geophysics
Principal researcher:Manoel Souza D'Agrella Filho
Grantee:Franklin Bispo dos Santos
Home Institution: Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG). Universidade de São Paulo (USP). São Paulo , SP, Brazil


In recent years, several authors proposed the existence of a Paleoproterozoic supercontinent, named Columbia, but its amalgamation, duration and disruption still cause many controversies. In South America, Amazonian Craton is a key component in the Columbia supercontinent paleogeography, but, scarcity and poor quality of paleomagnetic and geological data make it difficult to test paleogeographic models. Therefore, the determination of paleomagnetic poles associated with precise geochronological dating (U-Pb, 40Ar/39Ar) is fundamental to the definition of the Columbia paleogeography and very important to know the continental cycle evolution. In this way, the aim of this project is to obtain paleomagnetic key poles from the following Paleo- to Mesoproterozoic geological units belonging to the Amazonian Craton: the basement and sedimentary rocks from the Roraima Supergroup (~1980-1780 Ma) from Roraima State, the Tapirapé Intrusive Suite (~ 1880 Ma) from Mato Grosso State and the Alto Candeias Intrusive Suite (~ 1350 Ma) from Rondônia State. Determination of new key paleomagnetic poles from Amazonian Craton may help to elucidate the geodynamic evolution of the Amazonian Craton in global reconstructions. We also expect that the new results contribute to better define the Columbia Supercontinent configuration and to establish the apparent polar wander path (APWP) from Amazonian Craton during Paleo-Mesoproterozoic times. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
D'AGRELLA-FILHO, MANOEL S.; TRINDADE, RICARDO I. F.; QUEIROZ, MARCELO V. B.; MEIRA, VINICIUS T.; JANIKIAN, LILIANE; RUIZ, AMARILDO S.; BISPO-SANTOS, FRANKLIN. Reassessment of Aguapei (Salto do Ceu) paleomagnetic pole, Amazonian Craton and implications for Proterozoic supercontinents. Precambrian Research, v. 272, p. 1-17, . (11/50887-6, 12/50327-3)
BISPO-SANTOS, FRANKLIN; D'AGRELLA-FILHO, MANOEL S.; TRINDADE, RICARDO I. F.; JANIKIAN, LILIANE; REIS, NELSON J.. Was there SAMBA in Columbia? Paleomagnetic evidence from 1790 Ma Avanavero mafic sills (northern Amazonian Craton). Precambrian Research, v. 244, n. SI, p. 139-155, . (11/50887-6, 12/50327-3)
BISPO-SANTOS, FRANKLIN; D'AGRELLA-FILHO, MANOEL S.; JANIKIAN, LILIANE; REIS, NELSON J.; TRINDADE, RICARDO I. F.; REIS, MARIA ANNA A. A.. Towards Columbia: Paleomagnetism of 1980-1960 Ma Surumu volcanic rocks, Northern Amazonian Craton. Precambrian Research, v. 244, n. SI, p. 123-138, . (11/50887-6, 12/50327-3)

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