Relative motions of Africa, Iberia and Europe during Alpine orogeny
A revised kinematic model for the motions of Africa and Iberia relative to Europe since the Middle Jurassic is presented in order to provide boundary conditions for Alpine-Mediterranean reconstructions. These motions were calculated using up-to-date kinematic data predominantly based on magnetic iso...
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Format: | Article in Journal/Newspaper |
Language: | English |
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2002
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Online Access: | https://espace.library.uq.edu.au/view/UQ:38694 |
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ftunivqespace:oai:espace.library.uq.edu.au:UQ:38694 2023-05-15T17:34:47+02:00 Relative motions of Africa, Iberia and Europe during Alpine orogeny Rosenbaum, G Lister, GS Duboz, C 2002-01-01 https://espace.library.uq.edu.au/view/UQ:38694 eng eng Elsevier Science Bv doi:10.1016/S0040-1951(02)00442-0 issn:0040-1951 orcid:0000-0002-2544-093X Geochemistry & Geophysics Alpine Orogen Convergence Iberia Plate Kinematics Africa Dora-maira Massif Western Alps North-atlantic Pressure Metamorphism Continental Collision Tectonic Evolution Mylonite Zones Tethys Belt Rb-sr Journal Article 2002 ftunivqespace https://doi.org/10.1016/S0040-1951(02)00442-0 2020-12-14T23:19:55Z A revised kinematic model for the motions of Africa and Iberia relative to Europe since the Middle Jurassic is presented in order to provide boundary conditions for Alpine-Mediterranean reconstructions. These motions were calculated using up-to-date kinematic data predominantly based on magnetic isochrons in the Atlantic Ocean and published by various authors during the last 15 years. It is shown that convergence of Africa with respect to Europe commenced during the Cretaceous Normal Superchron (CNS), between chrons MO and 34 (120-83 Ma). This motion was subjected to fluctuations in convergence rates characterised by two periods of relatively rapid convergence (during Late Cretaceous and Eocene-Oligocene times) that alternated with periods of slower convergence (during the Paleocene and since the Early Miocene). Distinct changes in plate kinematics are recognised in the motion of Iberia with respect to Europe, indicated by: (1) a Late Jurassic-Early Cretaceous left-lateral strike-slip motion; (2) Late Cretaceous convergence; (3) Paleocene quiescence; (4) a short period of right-lateral strike-slip motion; and (5) final Eocene-Oligocene convergence. Based on these results, it is speculated that a collisional episode in the Alpine orogeny at ca. 65 Ma resulted in a dramatic decrease in the relative plate motions and that a slower motion since the Early Miocene promoted extension in the Mediterranean back-arc basins. (C) 2002 Elsevier Science B.V. All rights reserved. Article in Journal/Newspaper North Atlantic The University of Queensland: UQ eSpace Tectonophysics 359 1-2 117 129 |
institution |
Open Polar |
collection |
The University of Queensland: UQ eSpace |
op_collection_id |
ftunivqespace |
language |
English |
topic |
Geochemistry & Geophysics Alpine Orogen Convergence Iberia Plate Kinematics Africa Dora-maira Massif Western Alps North-atlantic Pressure Metamorphism Continental Collision Tectonic Evolution Mylonite Zones Tethys Belt Rb-sr |
spellingShingle |
Geochemistry & Geophysics Alpine Orogen Convergence Iberia Plate Kinematics Africa Dora-maira Massif Western Alps North-atlantic Pressure Metamorphism Continental Collision Tectonic Evolution Mylonite Zones Tethys Belt Rb-sr Rosenbaum, G Lister, GS Duboz, C Relative motions of Africa, Iberia and Europe during Alpine orogeny |
topic_facet |
Geochemistry & Geophysics Alpine Orogen Convergence Iberia Plate Kinematics Africa Dora-maira Massif Western Alps North-atlantic Pressure Metamorphism Continental Collision Tectonic Evolution Mylonite Zones Tethys Belt Rb-sr |
description |
A revised kinematic model for the motions of Africa and Iberia relative to Europe since the Middle Jurassic is presented in order to provide boundary conditions for Alpine-Mediterranean reconstructions. These motions were calculated using up-to-date kinematic data predominantly based on magnetic isochrons in the Atlantic Ocean and published by various authors during the last 15 years. It is shown that convergence of Africa with respect to Europe commenced during the Cretaceous Normal Superchron (CNS), between chrons MO and 34 (120-83 Ma). This motion was subjected to fluctuations in convergence rates characterised by two periods of relatively rapid convergence (during Late Cretaceous and Eocene-Oligocene times) that alternated with periods of slower convergence (during the Paleocene and since the Early Miocene). Distinct changes in plate kinematics are recognised in the motion of Iberia with respect to Europe, indicated by: (1) a Late Jurassic-Early Cretaceous left-lateral strike-slip motion; (2) Late Cretaceous convergence; (3) Paleocene quiescence; (4) a short period of right-lateral strike-slip motion; and (5) final Eocene-Oligocene convergence. Based on these results, it is speculated that a collisional episode in the Alpine orogeny at ca. 65 Ma resulted in a dramatic decrease in the relative plate motions and that a slower motion since the Early Miocene promoted extension in the Mediterranean back-arc basins. (C) 2002 Elsevier Science B.V. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Rosenbaum, G Lister, GS Duboz, C |
author_facet |
Rosenbaum, G Lister, GS Duboz, C |
author_sort |
Rosenbaum, G |
title |
Relative motions of Africa, Iberia and Europe during Alpine orogeny |
title_short |
Relative motions of Africa, Iberia and Europe during Alpine orogeny |
title_full |
Relative motions of Africa, Iberia and Europe during Alpine orogeny |
title_fullStr |
Relative motions of Africa, Iberia and Europe during Alpine orogeny |
title_full_unstemmed |
Relative motions of Africa, Iberia and Europe during Alpine orogeny |
title_sort |
relative motions of africa, iberia and europe during alpine orogeny |
publisher |
Elsevier Science Bv |
publishDate |
2002 |
url |
https://espace.library.uq.edu.au/view/UQ:38694 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
doi:10.1016/S0040-1951(02)00442-0 issn:0040-1951 orcid:0000-0002-2544-093X |
op_doi |
https://doi.org/10.1016/S0040-1951(02)00442-0 |
container_title |
Tectonophysics |
container_volume |
359 |
container_issue |
1-2 |
container_start_page |
117 |
op_container_end_page |
129 |
_version_ |
1766133716196786176 |