Preliminary paleomagnetic results from the Carboniferous-Permian El Imperial Formation sedimentary rocks in the San Rafael Block, Mendoza province

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During the Early Permian an extensive deformation belt well-known as Gondwánides developed in the southwest Gondwana margin. A foreland basin has been settled during the Late Carboniferous - Early Permian in the western end of this strip, and is represented by the El Imperial Formation, which crops...

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Autores principales: Tomezzoli, R.N., Japas, M.S.
Formato: JOUR
Materias:
Gondwana
Late Paleozoic
Paleomagnetism
San Rafael Block
South America
Carboniferous
magnetization
paleomagnetism
Permian
secular variation
sedimentary rock
Argentina
Mendoza
San Rafael Massif
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00044822_v61_n3_p370_Tomezzoli
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00044822_v61_n3_p370_Tomezzoli
record_format dspace
spelling todo:paper_00044822_v61_n3_p370_Tomezzoli2023-10-03T13:58:13Z Preliminary paleomagnetic results from the Carboniferous-Permian El Imperial Formation sedimentary rocks in the San Rafael Block, Mendoza province Tomezzoli, R.N. Japas, M.S. Gondwana Late Paleozoic Paleomagnetism San Rafael Block South America Carboniferous Gondwana magnetization paleomagnetism Permian secular variation sedimentary rock Argentina Mendoza San Rafael Massif South America During the Early Permian an extensive deformation belt well-known as Gondwánides developed in the southwest Gondwana margin. A foreland basin has been settled during the Late Carboniferous - Early Permian in the western end of this strip, and is represented by the El Imperial Formation, which crops out in the San Rafael Block. The upper section of this unit records an inversion of the ancient slopes, which has been interpreted as the first evidence of the migration of the orogenic front towards the foreland. Therefore, a paleomagnetic study has been carried out on this unit, searching for elements that allow to constraint the deformation age to evaluate the possible diachronism of it. First paleomagnetic results obtained in EI Imperial Formation, from the lower member in the Represa Agua del Toro and from the upper member in the Puesto La Josefa, are presented and discussed. These rocks have reverse magnetizations carried by hematite, of possible Permian age. Pole positions are discordant with the apparent polar wander path from South America. These differences could be explained because: secular variation was not properly averaged; rotations about vertical axes of the sampling localities; or the combination of these factors. © 2006 Asociación Geológica Argentina. Fil:Tomezzoli, R.N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Japas, M.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00044822_v61_n3_p370_Tomezzoli
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Gondwana
Late Paleozoic
Paleomagnetism
San Rafael Block
South America
Carboniferous
Gondwana
magnetization
paleomagnetism
Permian
secular variation
sedimentary rock
Argentina
Mendoza
San Rafael Massif
South America
spellingShingle Gondwana
Late Paleozoic
Paleomagnetism
San Rafael Block
South America
Carboniferous
Gondwana
magnetization
paleomagnetism
Permian
secular variation
sedimentary rock
Argentina
Mendoza
San Rafael Massif
South America
Tomezzoli, R.N.
Japas, M.S.
Preliminary paleomagnetic results from the Carboniferous-Permian El Imperial Formation sedimentary rocks in the San Rafael Block, Mendoza province
topic_facet Gondwana
Late Paleozoic
Paleomagnetism
San Rafael Block
South America
Carboniferous
Gondwana
magnetization
paleomagnetism
Permian
secular variation
sedimentary rock
Argentina
Mendoza
San Rafael Massif
South America
description During the Early Permian an extensive deformation belt well-known as Gondwánides developed in the southwest Gondwana margin. A foreland basin has been settled during the Late Carboniferous - Early Permian in the western end of this strip, and is represented by the El Imperial Formation, which crops out in the San Rafael Block. The upper section of this unit records an inversion of the ancient slopes, which has been interpreted as the first evidence of the migration of the orogenic front towards the foreland. Therefore, a paleomagnetic study has been carried out on this unit, searching for elements that allow to constraint the deformation age to evaluate the possible diachronism of it. First paleomagnetic results obtained in EI Imperial Formation, from the lower member in the Represa Agua del Toro and from the upper member in the Puesto La Josefa, are presented and discussed. These rocks have reverse magnetizations carried by hematite, of possible Permian age. Pole positions are discordant with the apparent polar wander path from South America. These differences could be explained because: secular variation was not properly averaged; rotations about vertical axes of the sampling localities; or the combination of these factors. © 2006 Asociación Geológica Argentina.
format JOUR
author Tomezzoli, R.N.
Japas, M.S.
author_facet Tomezzoli, R.N.
Japas, M.S.
author_sort Tomezzoli, R.N.
title Preliminary paleomagnetic results from the Carboniferous-Permian El Imperial Formation sedimentary rocks in the San Rafael Block, Mendoza province
title_short Preliminary paleomagnetic results from the Carboniferous-Permian El Imperial Formation sedimentary rocks in the San Rafael Block, Mendoza province
title_full Preliminary paleomagnetic results from the Carboniferous-Permian El Imperial Formation sedimentary rocks in the San Rafael Block, Mendoza province
title_fullStr Preliminary paleomagnetic results from the Carboniferous-Permian El Imperial Formation sedimentary rocks in the San Rafael Block, Mendoza province
title_full_unstemmed Preliminary paleomagnetic results from the Carboniferous-Permian El Imperial Formation sedimentary rocks in the San Rafael Block, Mendoza province
title_sort preliminary paleomagnetic results from the carboniferous-permian el imperial formation sedimentary rocks in the san rafael block, mendoza province
url http://hdl.handle.net/20.500.12110/paper_00044822_v61_n3_p370_Tomezzoli
work_keys_str_mv AT tomezzolirn preliminarypaleomagneticresultsfromthecarboniferouspermianelimperialformationsedimentaryrocksinthesanrafaelblockmendozaprovince
AT japasms preliminarypaleomagneticresultsfromthecarboniferouspermianelimperialformationsedimentaryrocksinthesanrafaelblockmendozaprovince
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