Palaeomagnetism of Upper Precambrian rocks of the La Tinta Formation, Argentina

Palaeomagnetic data from 77 hand samples collected in sequences of marine sediments of Late Precambrian age (709 ± 24 Myr) exposed at two zones (Olavarría—Sierras Bayas and Barker) in central Argentina (37.3° S 59.8° W, La Tinta Formation) are given. After thermal cleaning and chemical leaching, the...

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Autores principales: Valencio, Daniel Alberto, Sinito, Ana María
Publicado: 1980
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00168009_v62_n3_p563_Valencio
http://hdl.handle.net/20.500.12110/paper_00168009_v62_n3_p563_Valencio
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00168009_v62_n3_p563_Valencio
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spelling paper:paper_00168009_v62_n3_p563_Valencio2023-06-08T14:38:57Z Palaeomagnetism of Upper Precambrian rocks of the La Tinta Formation, Argentina Valencio, Daniel Alberto Sinito, Ana María Palaeomagnetic data from 77 hand samples collected in sequences of marine sediments of Late Precambrian age (709 ± 24 Myr) exposed at two zones (Olavarría—Sierras Bayas and Barker) in central Argentina (37.3° S 59.8° W, La Tinta Formation) are given. After thermal cleaning and chemical leaching, the samples show normal and reversed polarity and yield a palaeomagnetic pole at 300.9° E 79.3° S (α95=4.8°). The position of this pole supports the interpretation that Gondwana was a unit in Late Precambrian times and is consistent with the Late Precambrian glaciation (Marinoan) of south‐eastern Australia. The direction and polarity of the stable RM of samples and the change of direction of the stable RM for adjacent samples along a sequence are used to correlate La Tinta rocks within a zone and between the two zones. Copyright © 1980, Wiley Blackwell. All rights reserved Fil:Valencio, D.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Sinito, A.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1980 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00168009_v62_n3_p563_Valencio http://hdl.handle.net/20.500.12110/paper_00168009_v62_n3_p563_Valencio
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 77 hand samples collected in sequences of marine sediments of Late Precambrian age (709 ± 24 Myr) exposed at two zones (Olavarría—Sierras Bayas and Barker) in central Argentina (37.3° S 59.8° W, La Tinta Formation) are given. After thermal cleaning and chemical leaching, the samples show normal and reversed polarity and yield a palaeomagnetic pole at 300.9° E 79.3° S (α95=4.8°). The position of this pole supports the interpretation that Gondwana was a unit in Late Precambrian times and is consistent with the Late Precambrian glaciation (Marinoan) of south‐eastern Australia. The direction and polarity of the stable RM of samples and the change of direction of the stable RM for adjacent samples along a sequence are used to correlate La Tinta rocks within a zone and between the two zones. Copyright © 1980, Wiley Blackwell. All rights reserved
author Valencio, Daniel Alberto
Sinito, Ana María
spellingShingle Valencio, Daniel Alberto
Sinito, Ana María
Palaeomagnetism of Upper Precambrian rocks of the La Tinta Formation, Argentina
author_facet Valencio, Daniel Alberto
Sinito, Ana María
author_sort Valencio, Daniel Alberto
title Palaeomagnetism of Upper Precambrian rocks of the La Tinta Formation, Argentina
title_short Palaeomagnetism of Upper Precambrian rocks of the La Tinta Formation, Argentina
title_full Palaeomagnetism of Upper Precambrian rocks of the La Tinta Formation, Argentina
title_fullStr Palaeomagnetism of Upper Precambrian rocks of the La Tinta Formation, Argentina
title_full_unstemmed Palaeomagnetism of Upper Precambrian rocks of the La Tinta Formation, Argentina
title_sort palaeomagnetism of upper precambrian rocks of the la tinta formation, argentina
publishDate 1980
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00168009_v62_n3_p563_Valencio
http://hdl.handle.net/20.500.12110/paper_00168009_v62_n3_p563_Valencio
work_keys_str_mv AT valenciodanielalberto palaeomagnetismofupperprecambrianrocksofthelatintaformationargentina
AT sinitoanamaria palaeomagnetismofupperprecambrianrocksofthelatintaformationargentina
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