Precambrian Plate Tectonics in Northern Hudson Bay: Evidence From P and S Wave Seismic Tomography and Analysis of Source Side Effects in Relative Arrival-Time Data Sets
The geology of northern Hudson Bay, Canada, documents more than 2 billion years of history including the assembly of Precambrian and Archean terranes during several Paleoproterozoic orogenies, culminating in the Trans‐Hudson Orogen (THO) ∼1.8 Ga. The THO has been hypothesized to be similar in scale...
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fttriple:oai:gotriple.eu:10670/1.tp2lzj 2023-05-15T15:35:24+02:00 Precambrian Plate Tectonics in Northern Hudson Bay: Evidence From P and S Wave Seismic Tomography and Analysis of Source Side Effects in Relative Arrival-Time Data Sets Liddell, Mitch V. Bastow, Ian Rawlinson, Nicholas Darbyshire, Fiona Gilligan, Amy Watson, Emma http://archipel.uqam.ca/12415/1/Liddell_et_al_JGRSolidEarth_2018_123_5690-5709.pdf http://archipel.uqam.ca/12415/ https://doi.org/10.1029/2018JB015473 en eng Liddell, Mitch V.; Bastow, Ian; Rawlinson, Nicholas; Darbyshire, Fiona; Gilligan, Amy et Watson, Emma (2018). « Precambrian Plate Tectonics in Northern Hudson Bay: Evidence From P and S Wave Seismic Tomography and Analysis of Source Side Effects in Relative Arrival-Time Data Sets ». Journal of Geophysical Research: Solid Earth, 123(7), pp. 5690-5709. 10670/1.tp2lzj http://archipel.uqam.ca/12415/1/Liddell_et_al_JGRSolidEarth_2018_123_5690-5709.pdf http://archipel.uqam.ca/12415/ http://dx.doi.org/10.1029/2018JB015473 undefined UQAM Archipel : articles scientifiques geo demo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ fttriple https://doi.org/10.1029/2018JB015473 2023-01-22T17:57:43Z The geology of northern Hudson Bay, Canada, documents more than 2 billion years of history including the assembly of Precambrian and Archean terranes during several Paleoproterozoic orogenies, culminating in the Trans‐Hudson Orogen (THO) ∼1.8 Ga. The THO has been hypothesized to be similar in scale and nature to the ongoing Himalaya‐Karakoram‐Tibetan orogen, but the nature of lithospheric terrane boundaries, including potential plate‐scale underthrusting, is poorly understood. To address this problem, we present new P and S wave tomographic models of the mantle seismic structure using data from recent seismograph networks stretching from northern Ontario to Nunavut (60–100∘W and 50–80∘N). The large size of our network requires careful mitigation of the influence of source side structure that contaminates our relative arrival time residuals. Our tomographic models reveal a complicated internal structure in the Archean Churchill plate. However, no seismic wave speed distinction is observed across the Snowbird Tectonic Zone, which bisects the Churchill. The mantle lithosphere in the central region of Hudson Bay is distinct from the THO, indicating potential boundaries of microcontinents and lithospheric blocks between the principal colliders. Slow wave speeds underlie southern Baffin Island, the leading edge of the generally high wave speed Churchill plate. This is interpreted to be Paleoproterozoic material underthrust beneath Baffin Island in a modern‐style subduction zone setting. Article in Journal/Newspaper Baffin Island Baffin Hudson Bay Nunavut Unknown Baffin Island Canada Hudson Hudson Bay Nunavut Journal of Geophysical Research: Solid Earth 123 7 5690 5709 |
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English |
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geo demo |
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geo demo Liddell, Mitch V. Bastow, Ian Rawlinson, Nicholas Darbyshire, Fiona Gilligan, Amy Watson, Emma Precambrian Plate Tectonics in Northern Hudson Bay: Evidence From P and S Wave Seismic Tomography and Analysis of Source Side Effects in Relative Arrival-Time Data Sets |
topic_facet |
geo demo |
description |
The geology of northern Hudson Bay, Canada, documents more than 2 billion years of history including the assembly of Precambrian and Archean terranes during several Paleoproterozoic orogenies, culminating in the Trans‐Hudson Orogen (THO) ∼1.8 Ga. The THO has been hypothesized to be similar in scale and nature to the ongoing Himalaya‐Karakoram‐Tibetan orogen, but the nature of lithospheric terrane boundaries, including potential plate‐scale underthrusting, is poorly understood. To address this problem, we present new P and S wave tomographic models of the mantle seismic structure using data from recent seismograph networks stretching from northern Ontario to Nunavut (60–100∘W and 50–80∘N). The large size of our network requires careful mitigation of the influence of source side structure that contaminates our relative arrival time residuals. Our tomographic models reveal a complicated internal structure in the Archean Churchill plate. However, no seismic wave speed distinction is observed across the Snowbird Tectonic Zone, which bisects the Churchill. The mantle lithosphere in the central region of Hudson Bay is distinct from the THO, indicating potential boundaries of microcontinents and lithospheric blocks between the principal colliders. Slow wave speeds underlie southern Baffin Island, the leading edge of the generally high wave speed Churchill plate. This is interpreted to be Paleoproterozoic material underthrust beneath Baffin Island in a modern‐style subduction zone setting. |
format |
Article in Journal/Newspaper |
author |
Liddell, Mitch V. Bastow, Ian Rawlinson, Nicholas Darbyshire, Fiona Gilligan, Amy Watson, Emma |
author_facet |
Liddell, Mitch V. Bastow, Ian Rawlinson, Nicholas Darbyshire, Fiona Gilligan, Amy Watson, Emma |
author_sort |
Liddell, Mitch V. |
title |
Precambrian Plate Tectonics in Northern Hudson Bay: Evidence From P and S Wave Seismic Tomography and Analysis of Source Side Effects in Relative Arrival-Time Data Sets |
title_short |
Precambrian Plate Tectonics in Northern Hudson Bay: Evidence From P and S Wave Seismic Tomography and Analysis of Source Side Effects in Relative Arrival-Time Data Sets |
title_full |
Precambrian Plate Tectonics in Northern Hudson Bay: Evidence From P and S Wave Seismic Tomography and Analysis of Source Side Effects in Relative Arrival-Time Data Sets |
title_fullStr |
Precambrian Plate Tectonics in Northern Hudson Bay: Evidence From P and S Wave Seismic Tomography and Analysis of Source Side Effects in Relative Arrival-Time Data Sets |
title_full_unstemmed |
Precambrian Plate Tectonics in Northern Hudson Bay: Evidence From P and S Wave Seismic Tomography and Analysis of Source Side Effects in Relative Arrival-Time Data Sets |
title_sort |
precambrian plate tectonics in northern hudson bay: evidence from p and s wave seismic tomography and analysis of source side effects in relative arrival-time data sets |
url |
http://archipel.uqam.ca/12415/1/Liddell_et_al_JGRSolidEarth_2018_123_5690-5709.pdf http://archipel.uqam.ca/12415/ https://doi.org/10.1029/2018JB015473 |
geographic |
Baffin Island Canada Hudson Hudson Bay Nunavut |
geographic_facet |
Baffin Island Canada Hudson Hudson Bay Nunavut |
genre |
Baffin Island Baffin Hudson Bay Nunavut |
genre_facet |
Baffin Island Baffin Hudson Bay Nunavut |
op_source |
UQAM Archipel : articles scientifiques |
op_relation |
Liddell, Mitch V.; Bastow, Ian; Rawlinson, Nicholas; Darbyshire, Fiona; Gilligan, Amy et Watson, Emma (2018). « Precambrian Plate Tectonics in Northern Hudson Bay: Evidence From P and S Wave Seismic Tomography and Analysis of Source Side Effects in Relative Arrival-Time Data Sets ». Journal of Geophysical Research: Solid Earth, 123(7), pp. 5690-5709. 10670/1.tp2lzj http://archipel.uqam.ca/12415/1/Liddell_et_al_JGRSolidEarth_2018_123_5690-5709.pdf http://archipel.uqam.ca/12415/ http://dx.doi.org/10.1029/2018JB015473 |
op_rights |
undefined |
op_doi |
https://doi.org/10.1029/2018JB015473 |
container_title |
Journal of Geophysical Research: Solid Earth |
container_volume |
123 |
container_issue |
7 |
container_start_page |
5690 |
op_container_end_page |
5709 |
_version_ |
1766365743434170368 |