Paleomagnetism of the Carboniferous-Permian Patquía formation, Paganzo Basin, Argentina: Implications for the apparent polar wander path for South America and Gondwana during the late Palaeozoic

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The magnetic properties of the Carboniferous-Permian red beds of the Patquía Formation at Punta del Viento, Sierra de Umango and some previously reported localities, all in the Paganzo Basin (Argentina) have been studied. Whereas all sites are characterized by hematite as the main magnetic carrier a...

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Autores principales: Geuna, Silvana Evangelina, Escosteguy, Leonardo Darío, Limarino, Carlos Oscar
Publicado: 2010
Materias:
Apparent polar wander
Magnetic remanence
Paleomagnetism
Red beds
apparent polar wander path
Carboniferous
Gondwana
hematite
magnetic reversal
paleomagnetism
Permian
red bed
remagnetization
Argentina
Paganzo Basin
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_16956133_v8_n4_p373_Geuna
http://hdl.handle.net/20.500.12110/paper_16956133_v8_n4_p373_Geuna
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling paper:paper_16956133_v8_n4_p373_Geuna2023-06-08T16:26:50Z Paleomagnetism of the Carboniferous-Permian Patquía formation, Paganzo Basin, Argentina: Implications for the apparent polar wander path for South America and Gondwana during the late Palaeozoic Geuna, Silvana Evangelina Escosteguy, Leonardo Darío Limarino, Carlos Oscar Apparent polar wander Magnetic remanence Paleomagnetism Red beds apparent polar wander path Carboniferous Gondwana hematite magnetic reversal paleomagnetism Permian red bed remagnetization Argentina Paganzo Basin The magnetic properties of the Carboniferous-Permian red beds of the Patquía Formation at Punta del Viento, Sierra de Umango and some previously reported localities, all in the Paganzo Basin (Argentina) have been studied. Whereas all sites are characterized by hematite as the main magnetic carrier and a reversed-polarity magnetic remanence, we found a pattern of variation in magnetic properties along the integrated column for Patquía Formation. The Lower Member (Late Carboniferous) showed higher intensity of natural and saturation isothermal remanent magnetisation (NRM and SIRM, respectively) than the Permian Upper Member. The fall in NRM intensity from the Lower to Upper Member of the Patquía Formation may be related to a change in quantity and/ or grain-size of the hematite pigment, which may reflect the change in environmental and/or depositional setting. As for directional values of NRM, paleomagnetic poles reported for both sections are clearly different. The lower section provided a pole position coincident with Late Carboniferous poles for Gondwana, while the upper section poles are departed from the Early Permian position. We cannot decide whether the Upper Member pole is due to a primary magnetisation at 290 Ma or to a remagnetisation at ~260-270 Ma; even so, the obtained paleomagnetic pole is robust and indicates a rapid apparent polar wander in a ~30° counter clockwise rotation of the region, after deposition of the Late Carboniferous lower section, and in coincidence with the San Rafael Orogenic Phase. Fil:Geuna, S.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Escosteguy, L.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Limarino, C.O. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2010 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_16956133_v8_n4_p373_Geuna http://hdl.handle.net/20.500.12110/paper_16956133_v8_n4_p373_Geuna
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Apparent polar wander
Magnetic remanence
Paleomagnetism
Red beds
apparent polar wander path
Carboniferous
Gondwana
hematite
magnetic reversal
paleomagnetism
Permian
red bed
remagnetization
Argentina
Paganzo Basin
spellingShingle Apparent polar wander
Magnetic remanence
Paleomagnetism
Red beds
apparent polar wander path
Carboniferous
Gondwana
hematite
magnetic reversal
paleomagnetism
Permian
red bed
remagnetization
Argentina
Paganzo Basin
Geuna, Silvana Evangelina
Escosteguy, Leonardo Darío
Limarino, Carlos Oscar
Paleomagnetism of the Carboniferous-Permian Patquía formation, Paganzo Basin, Argentina: Implications for the apparent polar wander path for South America and Gondwana during the late Palaeozoic
topic_facet Apparent polar wander
Magnetic remanence
Paleomagnetism
Red beds
apparent polar wander path
Carboniferous
Gondwana
hematite
magnetic reversal
paleomagnetism
Permian
red bed
remagnetization
Argentina
Paganzo Basin
description The magnetic properties of the Carboniferous-Permian red beds of the Patquía Formation at Punta del Viento, Sierra de Umango and some previously reported localities, all in the Paganzo Basin (Argentina) have been studied. Whereas all sites are characterized by hematite as the main magnetic carrier and a reversed-polarity magnetic remanence, we found a pattern of variation in magnetic properties along the integrated column for Patquía Formation. The Lower Member (Late Carboniferous) showed higher intensity of natural and saturation isothermal remanent magnetisation (NRM and SIRM, respectively) than the Permian Upper Member. The fall in NRM intensity from the Lower to Upper Member of the Patquía Formation may be related to a change in quantity and/ or grain-size of the hematite pigment, which may reflect the change in environmental and/or depositional setting. As for directional values of NRM, paleomagnetic poles reported for both sections are clearly different. The lower section provided a pole position coincident with Late Carboniferous poles for Gondwana, while the upper section poles are departed from the Early Permian position. We cannot decide whether the Upper Member pole is due to a primary magnetisation at 290 Ma or to a remagnetisation at ~260-270 Ma; even so, the obtained paleomagnetic pole is robust and indicates a rapid apparent polar wander in a ~30° counter clockwise rotation of the region, after deposition of the Late Carboniferous lower section, and in coincidence with the San Rafael Orogenic Phase.
author Geuna, Silvana Evangelina
Escosteguy, Leonardo Darío
Limarino, Carlos Oscar
author_facet Geuna, Silvana Evangelina
Escosteguy, Leonardo Darío
Limarino, Carlos Oscar
author_sort Geuna, Silvana Evangelina
title Paleomagnetism of the Carboniferous-Permian Patquía formation, Paganzo Basin, Argentina: Implications for the apparent polar wander path for South America and Gondwana during the late Palaeozoic
title_short Paleomagnetism of the Carboniferous-Permian Patquía formation, Paganzo Basin, Argentina: Implications for the apparent polar wander path for South America and Gondwana during the late Palaeozoic
title_full Paleomagnetism of the Carboniferous-Permian Patquía formation, Paganzo Basin, Argentina: Implications for the apparent polar wander path for South America and Gondwana during the late Palaeozoic
title_fullStr Paleomagnetism of the Carboniferous-Permian Patquía formation, Paganzo Basin, Argentina: Implications for the apparent polar wander path for South America and Gondwana during the late Palaeozoic
title_full_unstemmed Paleomagnetism of the Carboniferous-Permian Patquía formation, Paganzo Basin, Argentina: Implications for the apparent polar wander path for South America and Gondwana during the late Palaeozoic
title_sort paleomagnetism of the carboniferous-permian patquía formation, paganzo basin, argentina: implications for the apparent polar wander path for south america and gondwana during the late palaeozoic
publishDate 2010
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_16956133_v8_n4_p373_Geuna
http://hdl.handle.net/20.500.12110/paper_16956133_v8_n4_p373_Geuna
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AT escosteguyleonardodario paleomagnetismofthecarboniferouspermianpatquiaformationpaganzobasinargentinaimplicationsfortheapparentpolarwanderpathforsouthamericaandgondwanaduringthelatepalaeozoic
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