Imperial College London
Alternate

Dr Ian Bastow

Faculty of Engineering, Department of Earth Science & Engineering

Senior Lecturer
 
 
 
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Contact

 

+44 (0)20 7594 2974i.bastow Website

 
 
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Location

 

4.45Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Liddell:2018:10.1029/2018jb015473,
author = {Liddell, MV and Bastow, I and Rawlinson, N and Darbyshire, F and Gilligan, A and Watson, E},
doi = {10.1029/2018jb015473},
journal = {Journal of Geophysical Research: Solid Earth},
pages = {5690--5709},
title = {Precambrian Plate Tectonics in Northern Hudson Bay: Evidence From <i>P</i> and <i>S</i> Wave Seismic Tomography and Analysis of Source Side Effects in Relative ArrivalTime Data Sets},
url = {http://dx.doi.org/10.1029/2018jb015473},
volume = {123},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - <jats:title>Abstract</jats:title><jats:p>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 TransHudson Orogen (THO) ∼1.8 Ga. The THO has been hypothesized to be similar in scale and nature to the ongoing HimalayaKarakoramTibetan orogen, but the nature of lithospheric terrane boundaries, including potential platescale underthrusting, is poorly understood. To address this problem, we present new <jats:italic>P</jats:italic> and <jats:italic>S</jats:italic> wave tomographic models of the mantle seismic structure using data from recent seismograph networks stretching from northern Ontario to Nunavut (60–100<jats:sup></jats:sup>W and 50–80<jats:sup></jats:sup>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 modernstyle subduction zone setting.</jats:p>
AU  - Liddell,MV
AU  - Bastow,I
AU  - Rawlinson,N
AU  - Darbyshire,F
AU  - Gilligan,A
AU  - Watson,E
DO  - 10.1029/2018jb015473
EP  - 5709
PY  - 2018///
SN  - 2169-9313
SP  - 5690
TI  - Precambrian Plate Tectonics in Northern Hudson Bay: Evidence From <i>P</i> and <i>S</i> Wave Seismic Tomography and Analysis of Source Side Effects in Relative ArrivalTime Data Sets
T2  - Journal of Geophysical Research: Solid Earth
UR  - http://dx.doi.org/10.1029/2018jb015473
UR  - http://hdl.handle.net/10044/1/60934
VL  - 123
ER  -
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