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: JOUR
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
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00044822_v56_n3_p293_Prezzi
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spelling todo:paper_00044822_v56_n3_p293_Prezzi2023-10-03T13:57:37Z Palaeomagnetic study of cenozoic rocks cropping out in the Southern Puna: New data on tectonic rotations Prezzi, C.B. Cenozoic Local rotations Palaeomagnetism Southern puna Cenozoic paleomagnetism tectonic rotation Argentina 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00044822_v56_n3_p293_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 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 JOUR
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
url http://hdl.handle.net/20.500.12110/paper_00044822_v56_n3_p293_Prezzi
work_keys_str_mv AT prezzicb palaeomagneticstudyofcenozoicrockscroppingoutinthesouthernpunanewdataontectonicrotations
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