Anisotropy of magnetic susceptibility and paleomagnetism in thedevonian lolén formation, sierras australes of buenos aires province

The Lolén Formation, of devonian age, outcrops in the Sierras Australes area of the Buenos Aires Province. The geological evolution of this region is still a subject of debate. In this work, anisotropy of magnetic susceptibility and paleomagnetism results are presented. The samples were taken from t...

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Autores principales: Tomezzoli, R.N., Arzad, G., Cristallini, E.O.
Formato: JOUR
Materias:
Gondwana
Paleozoic
Permian postectonic magnetization
Ventana group
Devonian
folding
magnetic anisotropy
magnetization
paleomagnetism
Permian
Argentina
Buenos Aires [Argentina]
Sierras Australes
Nica
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00044822_v74_n3_p326_Tomezzoli
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00044822_v74_n3_p326_Tomezzoli
record_format dspace
spelling todo:paper_00044822_v74_n3_p326_Tomezzoli2023-10-03T13:59:20Z Anisotropy of magnetic susceptibility and paleomagnetism in thedevonian lolén formation, sierras australes of buenos aires province Tomezzoli, R.N. Arzad, G. Cristallini, E.O. Gondwana Paleozoic Permian postectonic magnetization Ventana group Devonian folding Gondwana magnetic anisotropy magnetization paleomagnetism Paleozoic Permian Argentina Buenos Aires [Argentina] Sierras Australes Nica The Lolén Formation, of devonian age, outcrops in the Sierras Australes area of the Buenos Aires Province. The geological evolution of this region is still a subject of debate. In this work, anisotropy of magnetic susceptibility and paleomagnetism results are presented. The samples were taken from the Las Acacias farm. The geographic position is 38° 04,2' South Latitude and 61° 52,7' West Longitude. In the Lolén Formation was possible to isolate a preliminary postectonic magnetization with Permian age. This shows the opening of the magnetic system after its folding. The petrofabric is oblate by tectonic origin and indicates a SO-NE maximum compression direction related to the cleavage planes that cut the previous folding structures. The fact that these rocks are carriers of a postectonic magnetization, as a tectonic magnetic fabric, would indicate the overlap of different coaxial deformation events that could have started during Medium to Late Devonian. The deformation events could be a consequence of the collision of Chilenia and Patagonia against Gondwana and by postcolisional compressive deformation accommodation with latitudinal movements up to the Permian. © 2017, Asociacion Geologica Argentina. All rights reserved. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00044822_v74_n3_p326_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
Paleozoic
Permian postectonic magnetization
Ventana group
Devonian
folding
Gondwana
magnetic anisotropy
magnetization
paleomagnetism
Paleozoic
Permian
Argentina
Buenos Aires [Argentina]
Sierras Australes
Nica
spellingShingle Gondwana
Paleozoic
Permian postectonic magnetization
Ventana group
Devonian
folding
Gondwana
magnetic anisotropy
magnetization
paleomagnetism
Paleozoic
Permian
Argentina
Buenos Aires [Argentina]
Sierras Australes
Nica
Tomezzoli, R.N.
Arzad, G.
Cristallini, E.O.
Anisotropy of magnetic susceptibility and paleomagnetism in thedevonian lolén formation, sierras australes of buenos aires province
topic_facet Gondwana
Paleozoic
Permian postectonic magnetization
Ventana group
Devonian
folding
Gondwana
magnetic anisotropy
magnetization
paleomagnetism
Paleozoic
Permian
Argentina
Buenos Aires [Argentina]
Sierras Australes
Nica
description The Lolén Formation, of devonian age, outcrops in the Sierras Australes area of the Buenos Aires Province. The geological evolution of this region is still a subject of debate. In this work, anisotropy of magnetic susceptibility and paleomagnetism results are presented. The samples were taken from the Las Acacias farm. The geographic position is 38° 04,2' South Latitude and 61° 52,7' West Longitude. In the Lolén Formation was possible to isolate a preliminary postectonic magnetization with Permian age. This shows the opening of the magnetic system after its folding. The petrofabric is oblate by tectonic origin and indicates a SO-NE maximum compression direction related to the cleavage planes that cut the previous folding structures. The fact that these rocks are carriers of a postectonic magnetization, as a tectonic magnetic fabric, would indicate the overlap of different coaxial deformation events that could have started during Medium to Late Devonian. The deformation events could be a consequence of the collision of Chilenia and Patagonia against Gondwana and by postcolisional compressive deformation accommodation with latitudinal movements up to the Permian. © 2017, Asociacion Geologica Argentina. All rights reserved.
format JOUR
author Tomezzoli, R.N.
Arzad, G.
Cristallini, E.O.
author_facet Tomezzoli, R.N.
Arzad, G.
Cristallini, E.O.
author_sort Tomezzoli, R.N.
title Anisotropy of magnetic susceptibility and paleomagnetism in thedevonian lolén formation, sierras australes of buenos aires province
title_short Anisotropy of magnetic susceptibility and paleomagnetism in thedevonian lolén formation, sierras australes of buenos aires province
title_full Anisotropy of magnetic susceptibility and paleomagnetism in thedevonian lolén formation, sierras australes of buenos aires province
title_fullStr Anisotropy of magnetic susceptibility and paleomagnetism in thedevonian lolén formation, sierras australes of buenos aires province
title_full_unstemmed Anisotropy of magnetic susceptibility and paleomagnetism in thedevonian lolén formation, sierras australes of buenos aires province
title_sort anisotropy of magnetic susceptibility and paleomagnetism in thedevonian lolén formation, sierras australes of buenos aires province
url http://hdl.handle.net/20.500.12110/paper_00044822_v74_n3_p326_Tomezzoli
work_keys_str_mv AT tomezzolirn anisotropyofmagneticsusceptibilityandpaleomagnetisminthedevonianlolenformationsierrasaustralesofbuenosairesprovince
AT arzadg anisotropyofmagneticsusceptibilityandpaleomagnetisminthedevonianlolenformationsierrasaustralesofbuenosairesprovince
AT cristallinieo anisotropyofmagneticsusceptibilityandpaleomagnetisminthedevonianlolenformationsierrasaustralesofbuenosairesprovince
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