Palaeomagnetism of a sequence of Upper Palaeozoic‐Lower Mesozoic red beds from Argentina

Palaeomagnetic data from 101 hand samples collected in a rock sequence of about 300m of red beds and igneous rocks of the La Colina Formation (Late Palaeozoic) and Amaná‐Talampaya Formation (Early Triassic) exposed in north‐western Argentina (30° S 67° W) are given. Samples were submitted to thermal...

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Autores principales:	Sinito, A.M., Valencio, D.A., Vilas, J.F.
Formato:	JOUR
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00168009_v58_n2_p237_Sinito
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

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spelling	todo:paper_00168009_v58_n2_p237_Sinito2023-10-03T14:14:50Z Palaeomagnetism of a sequence of Upper Palaeozoic‐Lower Mesozoic red beds from Argentina Sinito, A.M. Valencio, D.A. Vilas, J.F. Palaeomagnetic data from 101 hand samples collected in a rock sequence of about 300m of red beds and igneous rocks of the La Colina Formation (Late Palaeozoic) and Amaná‐Talampaya Formation (Early Triassic) exposed in north‐western Argentina (30° S 67° W) are given. Samples were submitted to thermal, chemical and AC cleaning. After cleaning, the majority of La Colina Formation samples showed reversed polarity and yielded a palaeomagnetic pole at 49° S 343° E (α95=5°), which is consistent with the K‐Ar age (295 ± 5 Myr, Late Carboniferous) of a basaltic lava flow situated in the middle of La Colina rock succession. These rocks also recorded a normal polarity event (which we have correlated with the latest normal polarity event of the Debal'tseva Zone at the base of the Kiaman Magnetic Interval) and two excursions of the geomagnetic field. After treatment, the samples from the Amaná‐Talampaya Formation showed normal and reversed polarity and revealed frequent reversals and excursions of the geomagnetic field suggesting an Illawarra Zone age (post Kiaman, Late Tatarian‐Early Scyntian and younger). Copyright © 1979, Wiley Blackwell. All rights reserved Fil:Sinito, A.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Valencio, D.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Vilas, J.F. 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_00168009_v58_n2_p237_Sinito
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description	Palaeomagnetic data from 101 hand samples collected in a rock sequence of about 300m of red beds and igneous rocks of the La Colina Formation (Late Palaeozoic) and Amaná‐Talampaya Formation (Early Triassic) exposed in north‐western Argentina (30° S 67° W) are given. Samples were submitted to thermal, chemical and AC cleaning. After cleaning, the majority of La Colina Formation samples showed reversed polarity and yielded a palaeomagnetic pole at 49° S 343° E (α95=5°), which is consistent with the K‐Ar age (295 ± 5 Myr, Late Carboniferous) of a basaltic lava flow situated in the middle of La Colina rock succession. These rocks also recorded a normal polarity event (which we have correlated with the latest normal polarity event of the Debal'tseva Zone at the base of the Kiaman Magnetic Interval) and two excursions of the geomagnetic field. After treatment, the samples from the Amaná‐Talampaya Formation showed normal and reversed polarity and revealed frequent reversals and excursions of the geomagnetic field suggesting an Illawarra Zone age (post Kiaman, Late Tatarian‐Early Scyntian and younger). Copyright © 1979, Wiley Blackwell. All rights reserved
format	JOUR
author	Sinito, A.M. Valencio, D.A. Vilas, J.F.
spellingShingle	Sinito, A.M. Valencio, D.A. Vilas, J.F. Palaeomagnetism of a sequence of Upper Palaeozoic‐Lower Mesozoic red beds from Argentina
author_facet	Sinito, A.M. Valencio, D.A. Vilas, J.F.
author_sort	Sinito, A.M.
title	Palaeomagnetism of a sequence of Upper Palaeozoic‐Lower Mesozoic red beds from Argentina
title_short	Palaeomagnetism of a sequence of Upper Palaeozoic‐Lower Mesozoic red beds from Argentina
title_full	Palaeomagnetism of a sequence of Upper Palaeozoic‐Lower Mesozoic red beds from Argentina
title_fullStr	Palaeomagnetism of a sequence of Upper Palaeozoic‐Lower Mesozoic red beds from Argentina
title_full_unstemmed	Palaeomagnetism of a sequence of Upper Palaeozoic‐Lower Mesozoic red beds from Argentina
title_sort	palaeomagnetism of a sequence of upper palaeozoic‐lower mesozoic red beds from argentina
url	http://hdl.handle.net/20.500.12110/paper_00168009_v58_n2_p237_Sinito
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Palaeomagnetism of a sequence of Upper Palaeozoic‐Lower Mesozoic red beds from Argentina

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