Polymetamorphic Evolution of the Trans-Hudson Orogen, Baffin Island, Canada: Integration of Petrological, Structural and Geochronological Data
Supracrustal units metamorphosed at mid-crustal conditions within the Paleoproterozoic Trans-Hudson Orogen are preserved within an obliquely exposed continental collision zone on Baffin Island (Canada). Early granulite-facies assemblages yield thermobarometric data and phase diagram information that...
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fthighwire:oai:open-archive.highwire.org:petrology:egl060v1 2023-05-15T15:35:22+02:00 Polymetamorphic Evolution of the Trans-Hudson Orogen, Baffin Island, Canada: Integration of Petrological, Structural and Geochronological Data St-Onge, M. R. Wodicka, N. Ijewliw, O. 2006-11-03 07:04:07.0 text/html http://petrology.oxfordjournals.org/cgi/content/short/egl060v1 https://doi.org/10.1093/petrology/egl060 en eng Oxford University Press http://petrology.oxfordjournals.org/cgi/content/short/egl060v1 http://dx.doi.org/10.1093/petrology/egl060 Copyright (C) 2006, Oxford University Press Original Papers TEXT 2006 fthighwire https://doi.org/10.1093/petrology/egl060 2007-06-24T20:22:56Z Supracrustal units metamorphosed at mid-crustal conditions within the Paleoproterozoic Trans-Hudson Orogen are preserved within an obliquely exposed continental collision zone on Baffin Island (Canada). Early granulite-facies assemblages yield thermobarometric data and phase diagram information that define a steep, compressive P-T path segment. These assemblages are bracketed between ca. 1849 and 1835 Ma, and are interpreted to result from (1) heat advection by an 1865 +4/-2 to 1848 ± 2 Ma Andean-type granitic batholith, and (2) a ca . 1845 Ma crustal thickening event associated with accretion of an intra-oceanic arc terrane. A subsequent regional metamorphic event is characterized by the growth of retrograde, upper amphibolite-facies assemblages that define a clockwise, decompressive P-T path. Mineral growth is bracketed between 1820 ± 1 and 1813 ± 2 Ma, and is localized within deformation zones associated with the 1820 +4/-3 to 1795 ± 2 Ma collision of the Rae and Superior cratons. The metamorphic history of Baffin Island supports a progressive change from plate-margin to intraplate processes within an evolving convergent orogen during the Paleoproterozoic that is similar to those documented in younger collisional belts. Text Baffin Island Baffin HighWire Press (Stanford University) Baffin Island Canada Hudson Rae ENVELOPE(-116.053,-116.053,62.834,62.834) Journal of Petrology 48 2 271 302 |
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HighWire Press (Stanford University) |
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fthighwire |
language |
English |
topic |
Original Papers |
spellingShingle |
Original Papers St-Onge, M. R. Wodicka, N. Ijewliw, O. Polymetamorphic Evolution of the Trans-Hudson Orogen, Baffin Island, Canada: Integration of Petrological, Structural and Geochronological Data |
topic_facet |
Original Papers |
description |
Supracrustal units metamorphosed at mid-crustal conditions within the Paleoproterozoic Trans-Hudson Orogen are preserved within an obliquely exposed continental collision zone on Baffin Island (Canada). Early granulite-facies assemblages yield thermobarometric data and phase diagram information that define a steep, compressive P-T path segment. These assemblages are bracketed between ca. 1849 and 1835 Ma, and are interpreted to result from (1) heat advection by an 1865 +4/-2 to 1848 ± 2 Ma Andean-type granitic batholith, and (2) a ca . 1845 Ma crustal thickening event associated with accretion of an intra-oceanic arc terrane. A subsequent regional metamorphic event is characterized by the growth of retrograde, upper amphibolite-facies assemblages that define a clockwise, decompressive P-T path. Mineral growth is bracketed between 1820 ± 1 and 1813 ± 2 Ma, and is localized within deformation zones associated with the 1820 +4/-3 to 1795 ± 2 Ma collision of the Rae and Superior cratons. The metamorphic history of Baffin Island supports a progressive change from plate-margin to intraplate processes within an evolving convergent orogen during the Paleoproterozoic that is similar to those documented in younger collisional belts. |
format |
Text |
author |
St-Onge, M. R. Wodicka, N. Ijewliw, O. |
author_facet |
St-Onge, M. R. Wodicka, N. Ijewliw, O. |
author_sort |
St-Onge, M. R. |
title |
Polymetamorphic Evolution of the Trans-Hudson Orogen, Baffin Island, Canada: Integration of Petrological, Structural and Geochronological Data |
title_short |
Polymetamorphic Evolution of the Trans-Hudson Orogen, Baffin Island, Canada: Integration of Petrological, Structural and Geochronological Data |
title_full |
Polymetamorphic Evolution of the Trans-Hudson Orogen, Baffin Island, Canada: Integration of Petrological, Structural and Geochronological Data |
title_fullStr |
Polymetamorphic Evolution of the Trans-Hudson Orogen, Baffin Island, Canada: Integration of Petrological, Structural and Geochronological Data |
title_full_unstemmed |
Polymetamorphic Evolution of the Trans-Hudson Orogen, Baffin Island, Canada: Integration of Petrological, Structural and Geochronological Data |
title_sort |
polymetamorphic evolution of the trans-hudson orogen, baffin island, canada: integration of petrological, structural and geochronological data |
publisher |
Oxford University Press |
publishDate |
2006 |
url |
http://petrology.oxfordjournals.org/cgi/content/short/egl060v1 https://doi.org/10.1093/petrology/egl060 |
long_lat |
ENVELOPE(-116.053,-116.053,62.834,62.834) |
geographic |
Baffin Island Canada Hudson Rae |
geographic_facet |
Baffin Island Canada Hudson Rae |
genre |
Baffin Island Baffin |
genre_facet |
Baffin Island Baffin |
op_relation |
http://petrology.oxfordjournals.org/cgi/content/short/egl060v1 http://dx.doi.org/10.1093/petrology/egl060 |
op_rights |
Copyright (C) 2006, Oxford University Press |
op_doi |
https://doi.org/10.1093/petrology/egl060 |
container_title |
Journal of Petrology |
container_volume |
48 |
container_issue |
2 |
container_start_page |
271 |
op_container_end_page |
302 |
_version_ |
1766365704842379264 |