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 in Middle Ordovician times. Closure of the intervening proto-Atlantic (Iapetus) ocean was considered incom...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.510.4225 2023-05-15T17:18:57+02:00 Timing and spatial distribution of deformation in the Newfoundland Appalachians: a “multi-stage collision ” history Ben A. Van Der Pluijm The Pennsylvania State University CiteSeerX Archives 1985 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.510.4225 http://globalchange.umich.edu/ben/publications/87_tecto_vdp.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.510.4225 http://globalchange.umich.edu/ben/publications/87_tecto_vdp.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://globalchange.umich.edu/ben/publications/87_tecto_vdp.pdf text 1985 ftciteseerx 2016-01-08T09:37:13Z 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 in 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. Further-more, 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 Text Newfoundland Unknown |
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English |
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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 in 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. Further-more, 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 |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Ben A. Van Der Pluijm |
spellingShingle |
Ben A. Van Der Pluijm Timing and spatial distribution of deformation in the Newfoundland Appalachians: a “multi-stage collision ” history |
author_facet |
Ben A. Van Der Pluijm |
author_sort |
Ben A. Van |
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 |
publishDate |
1985 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.510.4225 http://globalchange.umich.edu/ben/publications/87_tecto_vdp.pdf |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
http://globalchange.umich.edu/ben/publications/87_tecto_vdp.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.510.4225 http://globalchange.umich.edu/ben/publications/87_tecto_vdp.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766089968257597440 |