Paleomagnetic study on mid-Paleoproterozoic rocks from the Rio de la Plata craton: Implications for Atlantica

The first successful paleomagnetic study on middle Paleoproterozoic rocks from the Rio de la Plata craton is reported. Samples collected from the Soca and Isla Mala granitic bodies, located in southern Uruguay, provided characteristic remanences that were used to compute the first paleomagnetic pole...

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Detalles Bibliográficos
Autores principales: Rapalini, Augusto Ernesto, Sánchez Bettucci, Leda, Vasquez, Carlos Alberto
Publicado: 2015
Materias:
Atlantica
Paleomagnetism
Paleoproterozoic
Rio de la Plata craton
South America
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1342937X_v27_n4_p1534_Rapalini
http://hdl.handle.net/20.500.12110/paper_1342937X_v27_n4_p1534_Rapalini
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_1342937X_v27_n4_p1534_Rapalini
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spelling paper:paper_1342937X_v27_n4_p1534_Rapalini2023-06-08T16:10:34Z Paleomagnetic study on mid-Paleoproterozoic rocks from the Rio de la Plata craton: Implications for Atlantica Rapalini, Augusto Ernesto Sánchez Bettucci, Leda Vasquez, Carlos Alberto Atlantica Paleomagnetism Paleoproterozoic Rio de la Plata craton South America The first successful paleomagnetic study on middle Paleoproterozoic rocks from the Rio de la Plata craton is reported. Samples collected from the Soca and Isla Mala granitic bodies, located in southern Uruguay, provided characteristic remanences that were used to compute the first paleomagnetic poles for the craton for ca. 2.05-2.02. Ga. The poles were complemented by a virtual geomagnetic pole from the slightly older Marincho and Mahoma complexes. The paleomagnetic results suggest fast apparent polar wander at high paleolatitudes for the Rio de la Plata craton. Comparison with coeval poles from the Guiana, Congo-São Francisco and West African cratons indicates that a configuration of Atlantica that resembles their Western Gondwana fit is not supported by paleomagnetic data. The geologic similarities in these four cratons are supportive of a major crustal forming event between 2.2-2.0. Ga. A modified configuration for Atlantica is proposed that is consistent with our new (and older) paleomagnetic data. Atlantica was assembled at 2.1-2.05. Ga at polar latitudes and drifted towards the equator soon afterwards. © 2014 International Association for Gondwana Research. Fil:Rapalini, A.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Sánchez Bettucci, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Vásquez, C.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1342937X_v27_n4_p1534_Rapalini http://hdl.handle.net/20.500.12110/paper_1342937X_v27_n4_p1534_Rapalini
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Atlantica
Paleomagnetism
Paleoproterozoic
Rio de la Plata craton
South America
spellingShingle Atlantica
Paleomagnetism
Paleoproterozoic
Rio de la Plata craton
South America
Rapalini, Augusto Ernesto
Sánchez Bettucci, Leda
Vasquez, Carlos Alberto
Paleomagnetic study on mid-Paleoproterozoic rocks from the Rio de la Plata craton: Implications for Atlantica
topic_facet Atlantica
Paleomagnetism
Paleoproterozoic
Rio de la Plata craton
South America
description The first successful paleomagnetic study on middle Paleoproterozoic rocks from the Rio de la Plata craton is reported. Samples collected from the Soca and Isla Mala granitic bodies, located in southern Uruguay, provided characteristic remanences that were used to compute the first paleomagnetic poles for the craton for ca. 2.05-2.02. Ga. The poles were complemented by a virtual geomagnetic pole from the slightly older Marincho and Mahoma complexes. The paleomagnetic results suggest fast apparent polar wander at high paleolatitudes for the Rio de la Plata craton. Comparison with coeval poles from the Guiana, Congo-São Francisco and West African cratons indicates that a configuration of Atlantica that resembles their Western Gondwana fit is not supported by paleomagnetic data. The geologic similarities in these four cratons are supportive of a major crustal forming event between 2.2-2.0. Ga. A modified configuration for Atlantica is proposed that is consistent with our new (and older) paleomagnetic data. Atlantica was assembled at 2.1-2.05. Ga at polar latitudes and drifted towards the equator soon afterwards. © 2014 International Association for Gondwana Research.
author Rapalini, Augusto Ernesto
Sánchez Bettucci, Leda
Vasquez, Carlos Alberto
author_facet Rapalini, Augusto Ernesto
Sánchez Bettucci, Leda
Vasquez, Carlos Alberto
author_sort Rapalini, Augusto Ernesto
title Paleomagnetic study on mid-Paleoproterozoic rocks from the Rio de la Plata craton: Implications for Atlantica
title_short Paleomagnetic study on mid-Paleoproterozoic rocks from the Rio de la Plata craton: Implications for Atlantica
title_full Paleomagnetic study on mid-Paleoproterozoic rocks from the Rio de la Plata craton: Implications for Atlantica
title_fullStr Paleomagnetic study on mid-Paleoproterozoic rocks from the Rio de la Plata craton: Implications for Atlantica
title_full_unstemmed Paleomagnetic study on mid-Paleoproterozoic rocks from the Rio de la Plata craton: Implications for Atlantica
title_sort paleomagnetic study on mid-paleoproterozoic rocks from the rio de la plata craton: implications for atlantica
publishDate 2015
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1342937X_v27_n4_p1534_Rapalini
http://hdl.handle.net/20.500.12110/paper_1342937X_v27_n4_p1534_Rapalini
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AT vasquezcarlosalberto paleomagneticstudyonmidpaleoproterozoicrocksfromtheriodelaplatacratonimplicationsforatlantica
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