TY - JOUR
T1 - Paleomagnetic evidence for the evolution of Meso- to Neo-proterozoic glaciogenic rocks in central-eastern Brazil
AU - D'Agrella-Filho, Manoel S.
AU - Pacca, Igor G.
AU - Teixeira, Wilson
AU - Onstott, Tullis C.
AU - Renne, Paul R.
N1 - Funding Information:
The authorsw ishto thankD rs. U. G. Cordani, J. Karfunkel and I. Karmann for their valuable commentosn them anuscriptW. e also thankE . C. Molina for his assistancien the computingre constructions.T he funding for this researchw as providedb y CNPq, FAPESP and FINEP from Brazil and NSF (grantsE AR-8451696a nd EAR-8805529f)r omthe U.S.A.
Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 1990/11
Y1 - 1990/11
N2 - Paleomagnetic studies on basic dikes in the eastern São Francisco Craton which have isotopic ages of 1.0-1.1 Ga, define an apparent polar wander path for South America over this time interval. The data indicate that the São Francisco Craton was at paleolatitudes between 40° and 65° at the time of emplacement of these dikes. Neo-Proterozoic sedimentary glaciogenic rocks, the Macaúbas Group, Bebedouro Formation, Ibiá Formation and Carandai Formation, crop out in central-eastern Brazil. An age of about 1.0 Ga has been proposed for these glacial deposits. Paleogeographical reconstructions of South America show a continental movement coherent with paleoenvironmental models proposed for the Macaúbas Group and suggest that the glacial period may have occurred between 1.01 and 1.08 Ga.
AB - Paleomagnetic studies on basic dikes in the eastern São Francisco Craton which have isotopic ages of 1.0-1.1 Ga, define an apparent polar wander path for South America over this time interval. The data indicate that the São Francisco Craton was at paleolatitudes between 40° and 65° at the time of emplacement of these dikes. Neo-Proterozoic sedimentary glaciogenic rocks, the Macaúbas Group, Bebedouro Formation, Ibiá Formation and Carandai Formation, crop out in central-eastern Brazil. An age of about 1.0 Ga has been proposed for these glacial deposits. Paleogeographical reconstructions of South America show a continental movement coherent with paleoenvironmental models proposed for the Macaúbas Group and suggest that the glacial period may have occurred between 1.01 and 1.08 Ga.
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U2 - 10.1016/0031-0182(90)90136-U
DO - 10.1016/0031-0182(90)90136-U
M3 - Article
AN - SCOPUS:0025684087
VL - 80
SP - 255
EP - 265
JO - Palaeogeography, Palaeoclimatology, Palaeoecology
JF - Palaeogeography, Palaeoclimatology, Palaeoecology
SN - 0031-0182
IS - 3-4
ER -