Characterization of the Wager shear zone, Nunavut, Canada: Insights from microstructures and geochronology
The Wager shear zone is an ∼450-km long zone of high strain hosted within Proterozoic and Archean rocks of the Rae domain in northwestern Hudson Bay, Nunavut. New field mapping and microstructural analyzes, combined with titanite and apatite geochronology, define the style, kinematics, and timing of...
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crcansciencepubl:10.1139/cjes-2022-0031 2024-09-15T18:11:03+00:00 Characterization of the Wager shear zone, Nunavut, Canada: Insights from microstructures and geochronology Therriault, Isabelle Larson, Kyle P. Steenkamp, Holly M. Apen, Francisco E. Graziani, Riccardo Soret, Mathieu Guilmette, Carl Cottle, John M. 2023 http://dx.doi.org/10.1139/cjes-2022-0031 https://cdnsciencepub.com/doi/full-xml/10.1139/cjes-2022-0031 https://cdnsciencepub.com/doi/pdf/10.1139/cjes-2022-0031 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 60, issue 1, page 78-96 ISSN 0008-4077 1480-3313 journal-article 2023 crcansciencepubl https://doi.org/10.1139/cjes-2022-0031 2024-07-25T04:10:06Z The Wager shear zone is an ∼450-km long zone of high strain hosted within Proterozoic and Archean rocks of the Rae domain in northwestern Hudson Bay, Nunavut. New field mapping and microstructural analyzes, combined with titanite and apatite geochronology, define the style, kinematics, and timing of Proterozoic ductile deformation. The results indicate that the Wager shear zone accommodated high-temperature deformation between ca. 1.75 and 1.74 Ga with post-kinematic cooling through apatite U–Pb closure (425–530 °C) at ca. 1705 Ma. These new data show that the Wager shear zone was last active later than inferred in previous work, at a time when the western Churchill Province was undergoing lithospheric delamination and exhumation following the terminal collisional events in the western portion of the Trans-Hudson Orogen. Article in Journal/Newspaper Hudson Bay Nunavut Canadian Science Publishing Canadian Journal of Earth Sciences 60 1 78 96 |
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Canadian Science Publishing |
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crcansciencepubl |
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English |
description |
The Wager shear zone is an ∼450-km long zone of high strain hosted within Proterozoic and Archean rocks of the Rae domain in northwestern Hudson Bay, Nunavut. New field mapping and microstructural analyzes, combined with titanite and apatite geochronology, define the style, kinematics, and timing of Proterozoic ductile deformation. The results indicate that the Wager shear zone accommodated high-temperature deformation between ca. 1.75 and 1.74 Ga with post-kinematic cooling through apatite U–Pb closure (425–530 °C) at ca. 1705 Ma. These new data show that the Wager shear zone was last active later than inferred in previous work, at a time when the western Churchill Province was undergoing lithospheric delamination and exhumation following the terminal collisional events in the western portion of the Trans-Hudson Orogen. |
format |
Article in Journal/Newspaper |
author |
Therriault, Isabelle Larson, Kyle P. Steenkamp, Holly M. Apen, Francisco E. Graziani, Riccardo Soret, Mathieu Guilmette, Carl Cottle, John M. |
spellingShingle |
Therriault, Isabelle Larson, Kyle P. Steenkamp, Holly M. Apen, Francisco E. Graziani, Riccardo Soret, Mathieu Guilmette, Carl Cottle, John M. Characterization of the Wager shear zone, Nunavut, Canada: Insights from microstructures and geochronology |
author_facet |
Therriault, Isabelle Larson, Kyle P. Steenkamp, Holly M. Apen, Francisco E. Graziani, Riccardo Soret, Mathieu Guilmette, Carl Cottle, John M. |
author_sort |
Therriault, Isabelle |
title |
Characterization of the Wager shear zone, Nunavut, Canada: Insights from microstructures and geochronology |
title_short |
Characterization of the Wager shear zone, Nunavut, Canada: Insights from microstructures and geochronology |
title_full |
Characterization of the Wager shear zone, Nunavut, Canada: Insights from microstructures and geochronology |
title_fullStr |
Characterization of the Wager shear zone, Nunavut, Canada: Insights from microstructures and geochronology |
title_full_unstemmed |
Characterization of the Wager shear zone, Nunavut, Canada: Insights from microstructures and geochronology |
title_sort |
characterization of the wager shear zone, nunavut, canada: insights from microstructures and geochronology |
publisher |
Canadian Science Publishing |
publishDate |
2023 |
url |
http://dx.doi.org/10.1139/cjes-2022-0031 https://cdnsciencepub.com/doi/full-xml/10.1139/cjes-2022-0031 https://cdnsciencepub.com/doi/pdf/10.1139/cjes-2022-0031 |
genre |
Hudson Bay Nunavut |
genre_facet |
Hudson Bay Nunavut |
op_source |
Canadian Journal of Earth Sciences volume 60, issue 1, page 78-96 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjes-2022-0031 |
container_title |
Canadian Journal of Earth Sciences |
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60 |
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1 |
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78 |
op_container_end_page |
96 |
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1810448649961865216 |