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Permanent link (DOI): https://doi.org/10.7939/R3BS99

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Magnetotelluric imaging of Precambrian lithosphere beneath southern Alberta Open Access

Descriptions

Other title
Subject/Keyword
Magnetotellurics, 3-D modelling, Laurentia, Alberta
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Nieuwenhuis, Greg
Supervisor and department
Unsworth, Martyn (Physics, Earth and Atmospheric Sciences)
Examining committee member and department
Heaman, Larry (Earth and Atmospheric Sciences)
Chacko, Thomas (Earth and Atmospheric Sciences)
Currie, Claire (Physics)
Department
Department of Physics
Specialization

Date accepted
2011-08-29T15:42:45Z
Graduation date
2011-11
Degree
Master of Science
Degree level
Master's
Abstract
Magnetotelluric (MT) data were collected at 67 stations during the 2008, 2009, and 2010 field seasons in southern Alberta. These have been combined with more than 300 MT stations previously collected in Alberta, allowing a three dimensional electrical resistivity model of the lithosphere to be developed to depths of 250 km. Initial modelling attempts of the MT data in southern Alberta showed that two dimensional data analysis could not be used to model these data. Therefore this study was undertaken to determine a three dimensional model that fits the data. The resulting 3-D resistivity model has shown a regionally pervasive conductor in the upper mantle below the Loverna Block, coincident with a north dipping reflector. A similar regional conductor and north dipping reflector occurs below part of the Medicine Hat Block, further characterizing the Precambrian subduction zones below southern Alberta.
Language
English
DOI
doi:10.7939/R3BS99
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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File title: Chapter 1
File author: Greg Nieuwenhuis
Page count: 156
File language: en-CA
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