Thermobarometry and geochronology of the Uvauk complex, a polymetamorphic Neoarchean and Paleoproterozoic segment of the Snowbird tectonic zone, Nunavut, Canada
The Uvauk complex is an ultramylonite-bounded, granulite-facies suite of anorthosite–gabbro that forms part of the Chesterfield Inlet segment of the Snowbird tectonic zone. Following initial anorthosite–gabbro magmatism at ca. 2.71 Ga and a cryptic 2.62–2.60 Ga event marked by zircon and monazite gr...
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crcansciencepubl:10.1139/e06-080 2024-03-03T08:43:36+00:00 Thermobarometry and geochronology of the Uvauk complex, a polymetamorphic Neoarchean and Paleoproterozoic segment of the Snowbird tectonic zone, Nunavut, Canada Mills, A J Berman, R G Davis, W J Tella, S Carr, S Roddick, C Hanmer, S 2007 http://dx.doi.org/10.1139/e06-080 http://www.nrcresearchpress.com/doi/pdf/10.1139/e06-080 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 44, issue 2, page 245-266 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 2007 crcansciencepubl https://doi.org/10.1139/e06-080 2024-02-07T10:53:35Z The Uvauk complex is an ultramylonite-bounded, granulite-facies suite of anorthosite–gabbro that forms part of the Chesterfield Inlet segment of the Snowbird tectonic zone. Following initial anorthosite–gabbro magmatism at ca. 2.71 Ga and a cryptic 2.62–2.60 Ga event marked by zircon and monazite growth, the Uvauk complex experienced two high-grade tectonometamorphic events at 2.56–2.50 and 1.91–1.90 Ga. Similar to the 2.56–2.50 Ga development of other shear zones in the region, the upper-amphibolite-facies to granulite-facies, moderately high-pressure (8.4–11.0 kbar and 705–760 °C) (1 kbar = 100 MPA) M1 event is interpreted to have involved the structural emplacement of ca. 2.71 Ga Uvauk complex rocks on ca. 2.68 Ga tonalitic rocks to the south. Granulite-facies, high-pressure (11.2–14.7 kbar and 695–865 °C) M2 metamorphism, gabbroic magmatism, and mylonite development within the complex at ca. 1.9 Ga culminated with ~3.5 kbar decompression at high temperature. Clockwise pressure–temperature–time (P–T–t) paths reflect crustal thickening, thought to be related to the early accretionary history of the Trans-Hudson Orogen. A thermal overprint at ca. 1.85–1.75 Ga resulted in retrograde metamorphism (5.8–6.0 kbar and 625–695 °C) associated with post-tectonic granitoid plutonism. Article in Journal/Newspaper Chesterfield Inlet Nunavut Canadian Science Publishing Nunavut Canada Hudson Chesterfield Inlet ENVELOPE(-90.705,-90.705,63.342,63.342) Canadian Journal of Earth Sciences 44 2 245 266 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Mills, A J Berman, R G Davis, W J Tella, S Carr, S Roddick, C Hanmer, S Thermobarometry and geochronology of the Uvauk complex, a polymetamorphic Neoarchean and Paleoproterozoic segment of the Snowbird tectonic zone, Nunavut, Canada |
topic_facet |
General Earth and Planetary Sciences |
description |
The Uvauk complex is an ultramylonite-bounded, granulite-facies suite of anorthosite–gabbro that forms part of the Chesterfield Inlet segment of the Snowbird tectonic zone. Following initial anorthosite–gabbro magmatism at ca. 2.71 Ga and a cryptic 2.62–2.60 Ga event marked by zircon and monazite growth, the Uvauk complex experienced two high-grade tectonometamorphic events at 2.56–2.50 and 1.91–1.90 Ga. Similar to the 2.56–2.50 Ga development of other shear zones in the region, the upper-amphibolite-facies to granulite-facies, moderately high-pressure (8.4–11.0 kbar and 705–760 °C) (1 kbar = 100 MPA) M1 event is interpreted to have involved the structural emplacement of ca. 2.71 Ga Uvauk complex rocks on ca. 2.68 Ga tonalitic rocks to the south. Granulite-facies, high-pressure (11.2–14.7 kbar and 695–865 °C) M2 metamorphism, gabbroic magmatism, and mylonite development within the complex at ca. 1.9 Ga culminated with ~3.5 kbar decompression at high temperature. Clockwise pressure–temperature–time (P–T–t) paths reflect crustal thickening, thought to be related to the early accretionary history of the Trans-Hudson Orogen. A thermal overprint at ca. 1.85–1.75 Ga resulted in retrograde metamorphism (5.8–6.0 kbar and 625–695 °C) associated with post-tectonic granitoid plutonism. |
format |
Article in Journal/Newspaper |
author |
Mills, A J Berman, R G Davis, W J Tella, S Carr, S Roddick, C Hanmer, S |
author_facet |
Mills, A J Berman, R G Davis, W J Tella, S Carr, S Roddick, C Hanmer, S |
author_sort |
Mills, A J |
title |
Thermobarometry and geochronology of the Uvauk complex, a polymetamorphic Neoarchean and Paleoproterozoic segment of the Snowbird tectonic zone, Nunavut, Canada |
title_short |
Thermobarometry and geochronology of the Uvauk complex, a polymetamorphic Neoarchean and Paleoproterozoic segment of the Snowbird tectonic zone, Nunavut, Canada |
title_full |
Thermobarometry and geochronology of the Uvauk complex, a polymetamorphic Neoarchean and Paleoproterozoic segment of the Snowbird tectonic zone, Nunavut, Canada |
title_fullStr |
Thermobarometry and geochronology of the Uvauk complex, a polymetamorphic Neoarchean and Paleoproterozoic segment of the Snowbird tectonic zone, Nunavut, Canada |
title_full_unstemmed |
Thermobarometry and geochronology of the Uvauk complex, a polymetamorphic Neoarchean and Paleoproterozoic segment of the Snowbird tectonic zone, Nunavut, Canada |
title_sort |
thermobarometry and geochronology of the uvauk complex, a polymetamorphic neoarchean and paleoproterozoic segment of the snowbird tectonic zone, nunavut, canada |
publisher |
Canadian Science Publishing |
publishDate |
2007 |
url |
http://dx.doi.org/10.1139/e06-080 http://www.nrcresearchpress.com/doi/pdf/10.1139/e06-080 |
long_lat |
ENVELOPE(-90.705,-90.705,63.342,63.342) |
geographic |
Nunavut Canada Hudson Chesterfield Inlet |
geographic_facet |
Nunavut Canada Hudson Chesterfield Inlet |
genre |
Chesterfield Inlet Nunavut |
genre_facet |
Chesterfield Inlet Nunavut |
op_source |
Canadian Journal of Earth Sciences volume 44, issue 2, page 245-266 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e06-080 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
44 |
container_issue |
2 |
container_start_page |
245 |
op_container_end_page |
266 |
_version_ |
1792499040506609664 |