Late Neoproterozoic to Early Palaeozoic palaeogeography of Avalonia: Some palaeomagnetic constraints from Nuneaton, central England

Palaeomagnetic studies have been carried out on Neoproterozoic, Cambrian and Ordovician rocks in the Nuneaton inlier. England (52.5° N, 1.5° W). Three magnetic components were recognized, which provide a consistent structural and magnetic history of the inlier. Neoproterozoic volcaniclastic and intr...

Descripción completa

Detalles Bibliográficos
Autor principal: Vizan, Haroldo
Publicado: 2003
Materias:
Avalonia
Neoproterozoic
Ordovician
Palaeogeography
Palaeomagnetism
paleogeography
paleomagnetism
Paleozoic
Proterozoic
tectonic rotation
England
Eurasia
Europe
United Kingdom
Western Europe
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00167568_v140_n6_p685_Vizan
http://hdl.handle.net/20.500.12110/paper_00167568_v140_n6_p685_Vizan
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00167568_v140_n6_p685_Vizan
record_format dspace
spelling paper:paper_00167568_v140_n6_p685_Vizan2023-06-08T14:38:50Z Late Neoproterozoic to Early Palaeozoic palaeogeography of Avalonia: Some palaeomagnetic constraints from Nuneaton, central England Vizan, Haroldo Avalonia Neoproterozoic Ordovician Palaeogeography Palaeomagnetism Avalonia paleogeography paleomagnetism Paleozoic Proterozoic tectonic rotation England Eurasia Europe United Kingdom Western Europe Palaeomagnetic studies have been carried out on Neoproterozoic, Cambrian and Ordovician rocks in the Nuneaton inlier. England (52.5° N, 1.5° W). Three magnetic components were recognized, which provide a consistent structural and magnetic history of the inlier. Neoproterozoic volcaniclastic and intrusive rocks acquired a characteristic remanent magnetization (ChRM) dated at 603 Ma. Late Ordovician rocks are represented by lamprophyre and diorite intrusions and their ChRMs were probably imprinted during their emplacement, at about 442 Ma. The Lower Cambrian sedimentary sequence of the Hartshill Sandstone Formation, which unconformably overlies the Neoproterozoic rocks and hosts the Ordovician intrusions, does not preserve a primary magnetization but shows the imprints of the Late Ordovician (442 Ma) remagnetization, as well as a probable end-Carboniferous remagnetization. Palaeolatitudes calculated for the late Neoproterozoic rocks and Ordovician intrusions are in good agreement with other palaeolatitudes calculated for Avalonia during those times. Both the late Neoproterozoic and Late Ordovician rocks additionally show ChRMs with declination anomalies indicating a large tectonic rotation of the Nuneaton area, possibly during one of the Caledonian phases of deformation affecting southern Britain. Fil:Vizan, H. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2003 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00167568_v140_n6_p685_Vizan http://hdl.handle.net/20.500.12110/paper_00167568_v140_n6_p685_Vizan
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Avalonia
Neoproterozoic
Ordovician
Palaeogeography
Palaeomagnetism
Avalonia
paleogeography
paleomagnetism
Paleozoic
Proterozoic
tectonic rotation
England
Eurasia
Europe
United Kingdom
Western Europe
spellingShingle Avalonia
Neoproterozoic
Ordovician
Palaeogeography
Palaeomagnetism
Avalonia
paleogeography
paleomagnetism
Paleozoic
Proterozoic
tectonic rotation
England
Eurasia
Europe
United Kingdom
Western Europe
Vizan, Haroldo
Late Neoproterozoic to Early Palaeozoic palaeogeography of Avalonia: Some palaeomagnetic constraints from Nuneaton, central England
topic_facet Avalonia
Neoproterozoic
Ordovician
Palaeogeography
Palaeomagnetism
Avalonia
paleogeography
paleomagnetism
Paleozoic
Proterozoic
tectonic rotation
England
Eurasia
Europe
United Kingdom
Western Europe
description Palaeomagnetic studies have been carried out on Neoproterozoic, Cambrian and Ordovician rocks in the Nuneaton inlier. England (52.5° N, 1.5° W). Three magnetic components were recognized, which provide a consistent structural and magnetic history of the inlier. Neoproterozoic volcaniclastic and intrusive rocks acquired a characteristic remanent magnetization (ChRM) dated at 603 Ma. Late Ordovician rocks are represented by lamprophyre and diorite intrusions and their ChRMs were probably imprinted during their emplacement, at about 442 Ma. The Lower Cambrian sedimentary sequence of the Hartshill Sandstone Formation, which unconformably overlies the Neoproterozoic rocks and hosts the Ordovician intrusions, does not preserve a primary magnetization but shows the imprints of the Late Ordovician (442 Ma) remagnetization, as well as a probable end-Carboniferous remagnetization. Palaeolatitudes calculated for the late Neoproterozoic rocks and Ordovician intrusions are in good agreement with other palaeolatitudes calculated for Avalonia during those times. Both the late Neoproterozoic and Late Ordovician rocks additionally show ChRMs with declination anomalies indicating a large tectonic rotation of the Nuneaton area, possibly during one of the Caledonian phases of deformation affecting southern Britain.
author Vizan, Haroldo
author_facet Vizan, Haroldo
author_sort Vizan, Haroldo
title Late Neoproterozoic to Early Palaeozoic palaeogeography of Avalonia: Some palaeomagnetic constraints from Nuneaton, central England
title_short Late Neoproterozoic to Early Palaeozoic palaeogeography of Avalonia: Some palaeomagnetic constraints from Nuneaton, central England
title_full Late Neoproterozoic to Early Palaeozoic palaeogeography of Avalonia: Some palaeomagnetic constraints from Nuneaton, central England
title_fullStr Late Neoproterozoic to Early Palaeozoic palaeogeography of Avalonia: Some palaeomagnetic constraints from Nuneaton, central England
title_full_unstemmed Late Neoproterozoic to Early Palaeozoic palaeogeography of Avalonia: Some palaeomagnetic constraints from Nuneaton, central England
title_sort late neoproterozoic to early palaeozoic palaeogeography of avalonia: some palaeomagnetic constraints from nuneaton, central england
publishDate 2003
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00167568_v140_n6_p685_Vizan
http://hdl.handle.net/20.500.12110/paper_00167568_v140_n6_p685_Vizan
work_keys_str_mv AT vizanharoldo lateneoproterozoictoearlypalaeozoicpalaeogeographyofavaloniasomepalaeomagneticconstraintsfromnuneatoncentralengland
_version_ 1768545909517320192

Ejemplares similares