Palaeomagnetic study of cenozoic rocks cropping out in the Southern Puna: New data on tectonic rotations

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In the Central Andes of southern Bolivia, northern Chile and north-western Argentina, a pattern of clockwise vertical axis rotations has been palaeomagnetically determined in Mesozoic and Cenozoic rocks cropping out in the Andean fore-arc and back-arc. The origin of these rotations is controversial....

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Autor principal:	Prezzi, C.B.
Formato:	Artículo publishedVersion
Publicado:	2001
Materias:	Cenozoic Local rotations Palaeomagnetism Southern puna paleomagnetism tectonic rotation Argentina
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00044822_v56_n3_p293_Prezzi https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00044822_v56_n3_p293_Prezzi_oai
Aporte de:	Repositorio Digital de la Universidad de Buenos Aires (UBA) de Universidad de Buenos Aires

id	I28-R145-paper_00044822_v56_n3_p293_Prezzi_oai
record_format	dspace
spelling	I28-R145-paper_00044822_v56_n3_p293_Prezzi_oai2024-08-16 Prezzi, C.B. 2001 In the Central Andes of southern Bolivia, northern Chile and north-western Argentina, a pattern of clockwise vertical axis rotations has been palaeomagnetically determined in Mesozoic and Cenozoic rocks cropping out in the Andean fore-arc and back-arc. The origin of these rotations is controversial. The scarcity of palaeomagnetic data available for the southern Central Andes, in particular for the Argentine Puna, is one of the problems that prevents the determination of the processes leading to the rotation pattern. With the aim of obtaining new palaeomagnetic data and trying to define the local or regional character of the rotations, 73 oriented samples were collected in the zones of Juncal Grande (25° 50′S - 67° 40′W) and Chorrillos (24° 12′S - 66°35'W), southern Argentine Puna. Remanent magnetizations, which indicate the existence of non-rotated and clockwise rotated localities, were isolated. It is suggested that the observed vertical axis rotations are of local character, controlled by the kinematics of the local structures. Fil:Prezzi, C.B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. application/pdf http://hdl.handle.net/20.500.12110/paper_00044822_v56_n3_p293_Prezzi info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar Rev. Asoc. Geol. Argent. 2001;56(3):293-303 Cenozoic Local rotations Palaeomagnetism Southern puna Cenozoic paleomagnetism tectonic rotation Argentina Palaeomagnetic study of cenozoic rocks cropping out in the Southern Puna: New data on tectonic rotations info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00044822_v56_n3_p293_Prezzi_oai
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-145
collection	Repositorio Digital de la Universidad de Buenos Aires (UBA)
topic	Cenozoic Local rotations Palaeomagnetism Southern puna Cenozoic paleomagnetism tectonic rotation Argentina
spellingShingle	Cenozoic Local rotations Palaeomagnetism Southern puna Cenozoic paleomagnetism tectonic rotation Argentina Prezzi, C.B. Palaeomagnetic study of cenozoic rocks cropping out in the Southern Puna: New data on tectonic rotations
topic_facet	Cenozoic Local rotations Palaeomagnetism Southern puna Cenozoic paleomagnetism tectonic rotation Argentina
description	In the Central Andes of southern Bolivia, northern Chile and north-western Argentina, a pattern of clockwise vertical axis rotations has been palaeomagnetically determined in Mesozoic and Cenozoic rocks cropping out in the Andean fore-arc and back-arc. The origin of these rotations is controversial. The scarcity of palaeomagnetic data available for the southern Central Andes, in particular for the Argentine Puna, is one of the problems that prevents the determination of the processes leading to the rotation pattern. With the aim of obtaining new palaeomagnetic data and trying to define the local or regional character of the rotations, 73 oriented samples were collected in the zones of Juncal Grande (25° 50′S - 67° 40′W) and Chorrillos (24° 12′S - 66°35'W), southern Argentine Puna. Remanent magnetizations, which indicate the existence of non-rotated and clockwise rotated localities, were isolated. It is suggested that the observed vertical axis rotations are of local character, controlled by the kinematics of the local structures.
format	Artículo Artículo publishedVersion
author	Prezzi, C.B.
author_facet	Prezzi, C.B.
author_sort	Prezzi, C.B.
title	Palaeomagnetic study of cenozoic rocks cropping out in the Southern Puna: New data on tectonic rotations
title_short	Palaeomagnetic study of cenozoic rocks cropping out in the Southern Puna: New data on tectonic rotations
title_full	Palaeomagnetic study of cenozoic rocks cropping out in the Southern Puna: New data on tectonic rotations
title_fullStr	Palaeomagnetic study of cenozoic rocks cropping out in the Southern Puna: New data on tectonic rotations
title_full_unstemmed	Palaeomagnetic study of cenozoic rocks cropping out in the Southern Puna: New data on tectonic rotations
title_sort	palaeomagnetic study of cenozoic rocks cropping out in the southern puna: new data on tectonic rotations
publishDate	2001
url	http://hdl.handle.net/20.500.12110/paper_00044822_v56_n3_p293_Prezzi https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_00044822_v56_n3_p293_Prezzi_oai
work_keys_str_mv	AT prezzicb palaeomagneticstudyofcenozoicrockscroppingoutinthesouthernpunanewdataontectonicrotations
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Palaeomagnetic study of cenozoic rocks cropping out in the Southern Puna: New data on tectonic rotations

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