New paleomagnetic data from Upper Oligocene-Lower Miocene rocks of the Northern Argentine Puna-Southern Bolivian Altiplano: Constraining the age of vertical axis rotations

Along the Central Andes a pattern of vertical axis rotations has been paleomagnetically identified. Such rotations are counterclockwise north of Arica Deflection (~19° S) and clockwise to the south. Different hypothesis and models have been proposed to explain the Central Andean Rotation Pattern (CA...

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Autores principales: Prezzi, C.B., Caffe, P.J., Iglesia Llanos, M.P., Orgeira, M.J.
Formato: JOUR
Materias:
Central Andean Rotation Pattern
Clockwise rotations
Northern Puna-Southern Altiplano
Vertical axis rotations
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_02643707_v78_n_p42_Prezzi
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_02643707_v78_n_p42_Prezzi2023-10-03T15:12:46Z New paleomagnetic data from Upper Oligocene-Lower Miocene rocks of the Northern Argentine Puna-Southern Bolivian Altiplano: Constraining the age of vertical axis rotations Prezzi, C.B. Caffe, P.J. Iglesia Llanos, M.P. Orgeira, M.J. Central Andean Rotation Pattern Clockwise rotations Northern Puna-Southern Altiplano Vertical axis rotations Along the Central Andes a pattern of vertical axis rotations has been paleomagnetically identified. Such rotations are counterclockwise north of Arica Deflection (~19° S) and clockwise to the south. Different hypothesis and models have been proposed to explain the Central Andean Rotation Pattern (CARP). However, the origin of the CARP is a subject of ongoing debate. Recently, different authors have proposed the possible existence of a close correlation between the time-space distribution of deformation and the amount of registered vertical axis rotations in the Southern Central Andes. In order to further investigate such relationship, new paleomagnetic studies were carried out in Upper Oligocene-Lower Miocene rocks of the Northern Argentine Puna and the Southern Bolivian Altiplano. Our results indicate that while one of the sampled localities did not undergo significant vertical axis rotations, the other two recorded clockwise vertical axis rotations larger than 30°. These results suggest the occurrence of small-block rotations in the Southern Bolivian Altiplano-Northern Argentine Puna prior to 15. Ma, which would correspond to the local accommodation of the regional deformation field. © 2014 Elsevier Ltd. Fil:Prezzi, C.B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Iglesia Llanos, M.P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Orgeira, M.J. 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_02643707_v78_n_p42_Prezzi
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Central Andean Rotation Pattern
Clockwise rotations
Northern Puna-Southern Altiplano
Vertical axis rotations
spellingShingle Central Andean Rotation Pattern
Clockwise rotations
Northern Puna-Southern Altiplano
Vertical axis rotations
Prezzi, C.B.
Caffe, P.J.
Iglesia Llanos, M.P.
Orgeira, M.J.
New paleomagnetic data from Upper Oligocene-Lower Miocene rocks of the Northern Argentine Puna-Southern Bolivian Altiplano: Constraining the age of vertical axis rotations
topic_facet Central Andean Rotation Pattern
Clockwise rotations
Northern Puna-Southern Altiplano
Vertical axis rotations
description Along the Central Andes a pattern of vertical axis rotations has been paleomagnetically identified. Such rotations are counterclockwise north of Arica Deflection (~19° S) and clockwise to the south. Different hypothesis and models have been proposed to explain the Central Andean Rotation Pattern (CARP). However, the origin of the CARP is a subject of ongoing debate. Recently, different authors have proposed the possible existence of a close correlation between the time-space distribution of deformation and the amount of registered vertical axis rotations in the Southern Central Andes. In order to further investigate such relationship, new paleomagnetic studies were carried out in Upper Oligocene-Lower Miocene rocks of the Northern Argentine Puna and the Southern Bolivian Altiplano. Our results indicate that while one of the sampled localities did not undergo significant vertical axis rotations, the other two recorded clockwise vertical axis rotations larger than 30°. These results suggest the occurrence of small-block rotations in the Southern Bolivian Altiplano-Northern Argentine Puna prior to 15. Ma, which would correspond to the local accommodation of the regional deformation field. © 2014 Elsevier Ltd.
format JOUR
author Prezzi, C.B.
Caffe, P.J.
Iglesia Llanos, M.P.
Orgeira, M.J.
author_facet Prezzi, C.B.
Caffe, P.J.
Iglesia Llanos, M.P.
Orgeira, M.J.
author_sort Prezzi, C.B.
title New paleomagnetic data from Upper Oligocene-Lower Miocene rocks of the Northern Argentine Puna-Southern Bolivian Altiplano: Constraining the age of vertical axis rotations
title_short New paleomagnetic data from Upper Oligocene-Lower Miocene rocks of the Northern Argentine Puna-Southern Bolivian Altiplano: Constraining the age of vertical axis rotations
title_full New paleomagnetic data from Upper Oligocene-Lower Miocene rocks of the Northern Argentine Puna-Southern Bolivian Altiplano: Constraining the age of vertical axis rotations
title_fullStr New paleomagnetic data from Upper Oligocene-Lower Miocene rocks of the Northern Argentine Puna-Southern Bolivian Altiplano: Constraining the age of vertical axis rotations
title_full_unstemmed New paleomagnetic data from Upper Oligocene-Lower Miocene rocks of the Northern Argentine Puna-Southern Bolivian Altiplano: Constraining the age of vertical axis rotations
title_sort new paleomagnetic data from upper oligocene-lower miocene rocks of the northern argentine puna-southern bolivian altiplano: constraining the age of vertical axis rotations
url http://hdl.handle.net/20.500.12110/paper_02643707_v78_n_p42_Prezzi
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