Timing and spatial distribution of deformation in the Newfoundland Appalachians: a "multi-stage collision" history
The Newfoundland Appalachians have been interpreted as an area where Lower Paleozoic plate convergence culminated in collision between an Ordovician volcanic chain and the North American craton hi Middle Ordovician times. Closure of the intervening proto-Atlantic (Iapetus) ocean was considered incom...
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ftumdeepblue:oai:deepblue.lib.umich.edu:2027.42/26738 2023-08-20T04:08:03+02:00 Timing and spatial distribution of deformation in the Newfoundland Appalachians: a "multi-stage collision" history van der Pluijm, Ben A. Department of Geological Sciences, University of Michigan, 1006 C.C. Little Building, Ann Arbor, MI 48109, U.S.A. 1987-04-01 1237133 bytes 3118 bytes application/pdf text/plain https://hdl.handle.net/2027.42/26738 http://www.sciencedirect.com/science/article/B6V72-48B0H34-94/2/f89cc8e04e0c54377e4bf7231f4501d5 https://doi.org/10.1016/0040-1951(87)90148-X en_US eng Elsevier van der Pluijm, Ben A. (1987/04/01)."Timing and spatial distribution of deformation in the Newfoundland Appalachians: a "multi-stage collision" history." Tectonophysics 135(1-3): 15-24. <http://hdl.handle.net/2027.42/26738> http://www.sciencedirect.com/science/article/B6V72-48B0H34-94/2/f89cc8e04e0c54377e4bf7231f4501d5 https://hdl.handle.net/2027.42/26738 http://dx.doi.org/10.1016/0040-1951(87)90148-X Tectonophysics IndexNoFollow Geology and Earth Sciences Science Article 1987 ftumdeepblue https://doi.org/10.1016/0040-1951(87)90148-X 2023-07-31T21:07:33Z The Newfoundland Appalachians have been interpreted as an area where Lower Paleozoic plate convergence culminated in collision between an Ordovician volcanic chain and the North American craton hi Middle Ordovician times. Closure of the intervening proto-Atlantic (Iapetus) ocean was considered incomplete. Subsequent deformation gave rise to regional folding and faulting.Recent studies in the Newfoundland Dunnage zone have revealed that the deformation history is far more complex than previously recognized. Large-scale thrusting, folding and faulting occurred in Silurian-Devonian times. Furthermore, it has been suggested that the Dunnage zone is an allochthonous terrane underlain by dominantly continental crust rather than representing remnants of a "rooted" ocean basin.In view of these results a revision of tectonic scenarios and zonal subdivision is warranted and a "multi-stage collision" history will be discussed, with emphasis on the spatial distribution and significance of Silurian-Devonian deformation in central Newfoundland.Subduction in Lower Paleozoic times gave rise to the formation of a volcanic terrane; concurrently, to the southeast a marginal sea was formed (Mariana-type subduction). In Middle Ordovician times the volcanic terrane collided with the North American craton ("first-stage collision") and back-arc spreading terminated. Continued crustal shortening resulted in the formation of a Silurian accretionary terrane (telescoped marginal sea), and its subsequent deformation ("second-stage collision"). Devonian (-Carboniferous?) strike-slip faulting represents the third stage in the collision history.The model is applicable to large tracts of the Caledonian-Appalachian chain. Its main characteristics are: 1. (a) the revised zonal subdivision of the area is based on characteristics of Silurian and older rocks, rather than Middle Ordovician and older rocks only;2. (b) the central part of the orogen represents a telescoped marginal sea that formed to the southeast of the Ordovician volcanic chain, ... Article in Journal/Newspaper Newfoundland University of Michigan: Deep Blue Tectonophysics 135 1-3 15 24 |
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University of Michigan: Deep Blue |
op_collection_id |
ftumdeepblue |
language |
English |
topic |
Geology and Earth Sciences Science |
spellingShingle |
Geology and Earth Sciences Science van der Pluijm, Ben A. Timing and spatial distribution of deformation in the Newfoundland Appalachians: a "multi-stage collision" history |
topic_facet |
Geology and Earth Sciences Science |
description |
The Newfoundland Appalachians have been interpreted as an area where Lower Paleozoic plate convergence culminated in collision between an Ordovician volcanic chain and the North American craton hi Middle Ordovician times. Closure of the intervening proto-Atlantic (Iapetus) ocean was considered incomplete. Subsequent deformation gave rise to regional folding and faulting.Recent studies in the Newfoundland Dunnage zone have revealed that the deformation history is far more complex than previously recognized. Large-scale thrusting, folding and faulting occurred in Silurian-Devonian times. Furthermore, it has been suggested that the Dunnage zone is an allochthonous terrane underlain by dominantly continental crust rather than representing remnants of a "rooted" ocean basin.In view of these results a revision of tectonic scenarios and zonal subdivision is warranted and a "multi-stage collision" history will be discussed, with emphasis on the spatial distribution and significance of Silurian-Devonian deformation in central Newfoundland.Subduction in Lower Paleozoic times gave rise to the formation of a volcanic terrane; concurrently, to the southeast a marginal sea was formed (Mariana-type subduction). In Middle Ordovician times the volcanic terrane collided with the North American craton ("first-stage collision") and back-arc spreading terminated. Continued crustal shortening resulted in the formation of a Silurian accretionary terrane (telescoped marginal sea), and its subsequent deformation ("second-stage collision"). Devonian (-Carboniferous?) strike-slip faulting represents the third stage in the collision history.The model is applicable to large tracts of the Caledonian-Appalachian chain. Its main characteristics are: 1. (a) the revised zonal subdivision of the area is based on characteristics of Silurian and older rocks, rather than Middle Ordovician and older rocks only;2. (b) the central part of the orogen represents a telescoped marginal sea that formed to the southeast of the Ordovician volcanic chain, ... |
author2 |
Department of Geological Sciences, University of Michigan, 1006 C.C. Little Building, Ann Arbor, MI 48109, U.S.A. |
format |
Article in Journal/Newspaper |
author |
van der Pluijm, Ben A. |
author_facet |
van der Pluijm, Ben A. |
author_sort |
van der Pluijm, Ben A. |
title |
Timing and spatial distribution of deformation in the Newfoundland Appalachians: a "multi-stage collision" history |
title_short |
Timing and spatial distribution of deformation in the Newfoundland Appalachians: a "multi-stage collision" history |
title_full |
Timing and spatial distribution of deformation in the Newfoundland Appalachians: a "multi-stage collision" history |
title_fullStr |
Timing and spatial distribution of deformation in the Newfoundland Appalachians: a "multi-stage collision" history |
title_full_unstemmed |
Timing and spatial distribution of deformation in the Newfoundland Appalachians: a "multi-stage collision" history |
title_sort |
timing and spatial distribution of deformation in the newfoundland appalachians: a "multi-stage collision" history |
publisher |
Elsevier |
publishDate |
1987 |
url |
https://hdl.handle.net/2027.42/26738 http://www.sciencedirect.com/science/article/B6V72-48B0H34-94/2/f89cc8e04e0c54377e4bf7231f4501d5 https://doi.org/10.1016/0040-1951(87)90148-X |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_relation |
van der Pluijm, Ben A. (1987/04/01)."Timing and spatial distribution of deformation in the Newfoundland Appalachians: a "multi-stage collision" history." Tectonophysics 135(1-3): 15-24. <http://hdl.handle.net/2027.42/26738> http://www.sciencedirect.com/science/article/B6V72-48B0H34-94/2/f89cc8e04e0c54377e4bf7231f4501d5 https://hdl.handle.net/2027.42/26738 http://dx.doi.org/10.1016/0040-1951(87)90148-X Tectonophysics |
op_rights |
IndexNoFollow |
op_doi |
https://doi.org/10.1016/0040-1951(87)90148-X |
container_title |
Tectonophysics |
container_volume |
135 |
container_issue |
1-3 |
container_start_page |
15 |
op_container_end_page |
24 |
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1774720121987661824 |