Baltica. A synopsis of vendian-permian palaeomagnetic data and their palaeotectonic implications
In light of recent additions to the Palaeozoic palaeo-magnetic data-base, particularly for the Ordovician era, a revised apparent polar wander (APW) path for Baltica has been constructed following a rigorous synthesis of all Late Precambrian-Permian data. The APW path is characterized by two promine...
Published in: | Earth-Science Reviews |
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Main Authors: | , , , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Elsevier
1992
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Online Access: | https://hdl.handle.net/2027.42/29743 http://www.sciencedirect.com/science/article/B6V62-489SNW9-1F/2/f6ea08a023a5d950876f744e021402b6 https://doi.org/10.1016/0012-8252(92)90023-M |
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ftumdeepblue:oai:deepblue.lib.umich.edu:2027.42/29743 |
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openpolar |
institution |
Open Polar |
collection |
University of Michigan: Deep Blue |
op_collection_id |
ftumdeepblue |
language |
English |
topic |
Geology and Earth Sciences Science |
spellingShingle |
Geology and Earth Sciences Science Torsvik, Trond H. Smethurst, Mark A. Van der Voo, Rob Trench, Allan Abrahamsen, Niels Halvorsen, Erik Baltica. A synopsis of vendian-permian palaeomagnetic data and their palaeotectonic implications |
topic_facet |
Geology and Earth Sciences Science |
description |
In light of recent additions to the Palaeozoic palaeo-magnetic data-base, particularly for the Ordovician era, a revised apparent polar wander (APW) path for Baltica has been constructed following a rigorous synthesis of all Late Precambrian-Permian data. The APW path is characterized by two prominent loops. Firstly, a Late Precambrian-Cambrian loop probably relating to a rifting event and secondly, a younger loop relating to a Mid-Silurian (Scandian) collision event. These features imply major change in plate-tectonic reconfiguration.Baltica probably represented an individual continental unit in Early Palaeozoic times and was positioned in high southerly latitudes in an "inverted" geographic orientation. In such a reconstruction Baltica was separated from the northern margin of Gondwana by the Tornquist Sea and from Laurentia by the Iapetus Ocean. The Tornquist Zone is thus interpreted as a passive or dextral transform margin during the early Palaeozoic.While undergoing counter-clockwise rotations (up to 1.6[deg]/Ma), Baltica drifted northward through most of the Palaeozoic; except for a short period of southerly movement in Late Silurian-Early Devonian times after collision with Laurentia. Rapid movements in latitude (up to 9 cm/yr) are noted in Late Precambrian/early Palaeozoic times and significant decrease in velocities throughout Palaeozoic time probably reflect the progressive amalgamation of a larger continent by Early-Devonian (Euramerica) and Permian (Pangea) times.The Tornquist Sea had a principal component of palaeo-east-west orientation. Hence it is difficult to be precise in the timing of when micro-continents such as Eastern Avalonia and the European Massifs ultimately collided along the southwestern margin of Baltica. These micro-continents are considered to have been peripheral to Gondwana (in high southerly latitudes) during the Early Ordovician. Eastern Avalonia clearly had rifted off Gondwana by Llanvirn-Llandeilo times and may have collided with Baltica during Late Ordovician times, although the present available Silurian palaeomagnetic data from Eastern Avalonia may suggest collision in Late Silurian times.Across the Iapetus facing margin of Baltica, Laurentia was situated in equatorial to southerly latitudes during most of the Lower Palaeozoic. These continents collided in Mid-Silurian times, i.e. a first collision between southwestern Norway and Greenland/Scotland which gave rise to the early Scandian Orogeny (425 Ma) in southwestern Norway possible followed by a later, but less dramatic, Scandian event in northern Norway at around 410 Ma. Since Baltica was geographically inverted in early Palaeozoic times, the collisional margin could not have been a margin that once rifted off Laurentia as assumed in a number of plate-tectonic models. Peer Reviewed http://deepblue.lib.umich.edu/bitstream/2027.42/29743/1/0000080.pdf |
author2 |
Department of Geological Sciences, The University of Michigan, 1006 C.C. Little Building, Ann Arbor, MI 48109-1063, USA Geological Survey of Norway, P.B. 3006 Lade, N-7002, Trondheim, Norway Geological Survey of Norway, P.B. 3006 Lade, N-7002, Trondheim, Norway; Department of Geology, University of Western Australia, Nedlands, Perth, Western Australia 6009, Australia. Laboratory of Geophysics, Department of Earth Sciences, Arhus University, DK-8200, Aarhus N, Denmark Sogn of Fjordane College, P.B. 39, N-5801, Sogndal, Norway |
format |
Article in Journal/Newspaper |
author |
Torsvik, Trond H. Smethurst, Mark A. Van der Voo, Rob Trench, Allan Abrahamsen, Niels Halvorsen, Erik |
author_facet |
Torsvik, Trond H. Smethurst, Mark A. Van der Voo, Rob Trench, Allan Abrahamsen, Niels Halvorsen, Erik |
author_sort |
Torsvik, Trond H. |
title |
Baltica. A synopsis of vendian-permian palaeomagnetic data and their palaeotectonic implications |
title_short |
Baltica. A synopsis of vendian-permian palaeomagnetic data and their palaeotectonic implications |
title_full |
Baltica. A synopsis of vendian-permian palaeomagnetic data and their palaeotectonic implications |
title_fullStr |
Baltica. A synopsis of vendian-permian palaeomagnetic data and their palaeotectonic implications |
title_full_unstemmed |
Baltica. A synopsis of vendian-permian palaeomagnetic data and their palaeotectonic implications |
title_sort |
baltica. a synopsis of vendian-permian palaeomagnetic data and their palaeotectonic implications |
publisher |
Elsevier |
publishDate |
1992 |
url |
https://hdl.handle.net/2027.42/29743 http://www.sciencedirect.com/science/article/B6V62-489SNW9-1F/2/f6ea08a023a5d950876f744e021402b6 https://doi.org/10.1016/0012-8252(92)90023-M |
geographic |
Greenland Norway |
geographic_facet |
Greenland Norway |
genre |
Greenland Northern Norway |
genre_facet |
Greenland Northern Norway |
op_relation |
Torsvik, Trond H., Smethurst, Mark A., Van der Voo, Rob, Trench, Allan, Abrahamsen, Niels, Halvorsen, Erik (1992/11)."Baltica. A synopsis of vendian-permian palaeomagnetic data and their palaeotectonic implications." Earth-Science Reviews 33(2): 133-152. <http://hdl.handle.net/2027.42/29743> http://www.sciencedirect.com/science/article/B6V62-489SNW9-1F/2/f6ea08a023a5d950876f744e021402b6 https://hdl.handle.net/2027.42/29743 http://dx.doi.org/10.1016/0012-8252(92)90023-M Earth-Science Reviews |
op_rights |
IndexNoFollow |
op_doi |
https://doi.org/10.1016/0012-8252(92)90023-M |
container_title |
Earth-Science Reviews |
container_volume |
33 |
container_issue |
2 |
container_start_page |
133 |
op_container_end_page |
152 |
_version_ |
1766020425377120256 |
spelling |
ftumdeepblue:oai:deepblue.lib.umich.edu:2027.42/29743 2023-05-15T16:30:41+02:00 Baltica. A synopsis of vendian-permian palaeomagnetic data and their palaeotectonic implications Torsvik, Trond H. Smethurst, Mark A. Van der Voo, Rob Trench, Allan Abrahamsen, Niels Halvorsen, Erik Department of Geological Sciences, The University of Michigan, 1006 C.C. Little Building, Ann Arbor, MI 48109-1063, USA Geological Survey of Norway, P.B. 3006 Lade, N-7002, Trondheim, Norway Geological Survey of Norway, P.B. 3006 Lade, N-7002, Trondheim, Norway; Department of Geology, University of Western Australia, Nedlands, Perth, Western Australia 6009, Australia. Laboratory of Geophysics, Department of Earth Sciences, Arhus University, DK-8200, Aarhus N, Denmark Sogn of Fjordane College, P.B. 39, N-5801, Sogndal, Norway 1992-11 1388050 bytes 3118 bytes application/pdf text/plain https://hdl.handle.net/2027.42/29743 http://www.sciencedirect.com/science/article/B6V62-489SNW9-1F/2/f6ea08a023a5d950876f744e021402b6 https://doi.org/10.1016/0012-8252(92)90023-M en_US eng Elsevier Torsvik, Trond H., Smethurst, Mark A., Van der Voo, Rob, Trench, Allan, Abrahamsen, Niels, Halvorsen, Erik (1992/11)."Baltica. A synopsis of vendian-permian palaeomagnetic data and their palaeotectonic implications." Earth-Science Reviews 33(2): 133-152. <http://hdl.handle.net/2027.42/29743> http://www.sciencedirect.com/science/article/B6V62-489SNW9-1F/2/f6ea08a023a5d950876f744e021402b6 https://hdl.handle.net/2027.42/29743 http://dx.doi.org/10.1016/0012-8252(92)90023-M Earth-Science Reviews IndexNoFollow Geology and Earth Sciences Science Article 1992 ftumdeepblue https://doi.org/10.1016/0012-8252(92)90023-M 2021-08-02T13:14:45Z In light of recent additions to the Palaeozoic palaeo-magnetic data-base, particularly for the Ordovician era, a revised apparent polar wander (APW) path for Baltica has been constructed following a rigorous synthesis of all Late Precambrian-Permian data. The APW path is characterized by two prominent loops. Firstly, a Late Precambrian-Cambrian loop probably relating to a rifting event and secondly, a younger loop relating to a Mid-Silurian (Scandian) collision event. These features imply major change in plate-tectonic reconfiguration.Baltica probably represented an individual continental unit in Early Palaeozoic times and was positioned in high southerly latitudes in an "inverted" geographic orientation. In such a reconstruction Baltica was separated from the northern margin of Gondwana by the Tornquist Sea and from Laurentia by the Iapetus Ocean. The Tornquist Zone is thus interpreted as a passive or dextral transform margin during the early Palaeozoic.While undergoing counter-clockwise rotations (up to 1.6[deg]/Ma), Baltica drifted northward through most of the Palaeozoic; except for a short period of southerly movement in Late Silurian-Early Devonian times after collision with Laurentia. Rapid movements in latitude (up to 9 cm/yr) are noted in Late Precambrian/early Palaeozoic times and significant decrease in velocities throughout Palaeozoic time probably reflect the progressive amalgamation of a larger continent by Early-Devonian (Euramerica) and Permian (Pangea) times.The Tornquist Sea had a principal component of palaeo-east-west orientation. Hence it is difficult to be precise in the timing of when micro-continents such as Eastern Avalonia and the European Massifs ultimately collided along the southwestern margin of Baltica. These micro-continents are considered to have been peripheral to Gondwana (in high southerly latitudes) during the Early Ordovician. Eastern Avalonia clearly had rifted off Gondwana by Llanvirn-Llandeilo times and may have collided with Baltica during Late Ordovician times, although the present available Silurian palaeomagnetic data from Eastern Avalonia may suggest collision in Late Silurian times.Across the Iapetus facing margin of Baltica, Laurentia was situated in equatorial to southerly latitudes during most of the Lower Palaeozoic. These continents collided in Mid-Silurian times, i.e. a first collision between southwestern Norway and Greenland/Scotland which gave rise to the early Scandian Orogeny (425 Ma) in southwestern Norway possible followed by a later, but less dramatic, Scandian event in northern Norway at around 410 Ma. Since Baltica was geographically inverted in early Palaeozoic times, the collisional margin could not have been a margin that once rifted off Laurentia as assumed in a number of plate-tectonic models. Peer Reviewed http://deepblue.lib.umich.edu/bitstream/2027.42/29743/1/0000080.pdf Article in Journal/Newspaper Greenland Northern Norway University of Michigan: Deep Blue Greenland Norway Earth-Science Reviews 33 2 133 152 |