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Permanent link (DOI): https://doi.org/10.7939/R37S7J45F

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Investigation of dielectric properties of rocks and minerals for GPR data interpretation Open Access

Descriptions

Other title
Subject/Keyword
Dielectrics
Permittivity
Rocks
Minerals
Potash
GPR
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Pervin, Sohely
Supervisor and department
Schmitt, Douglas (Physics)
Examining committee member and department
Hegmann, Frank (Physics)
Jung, Jan Alexander (Physics)
Kravchinsky, Vadim (Physics)
Schmitt, Douglas (Physics)
Department
Department of Physics
Specialization
Geophysics
Date accepted
2015-09-30T09:12:28Z
Graduation date
2015-11
Degree
Master of Science
Degree level
Master's
Abstract
At radar frequencies, the propagation speeds and attenuations of electromagnetic (EM) waves are controlled by the complex dielectric permittivity. Consequently, the real and imaginary components as well as their variation with frequency are important parameters necessary for properly interpreting Ground Penetrating Radar (GPR) data. Such data is used to detect objects or to infer the geological structure, and it does this primarily by interpreting the times and amplitudes of radar reflections in the soils and rocks near the earth’s surface. This study is motivated by the use of GPR to map weak and unsafe layers in underground potash mines in Saskatchewan. Consequently, knowledge of dielectric permittivity of the evaporate minerals and their contaminants is necessary to interpret GPR data more effectively particularly with regards to mine safety. In this study, we measured the dielectric permittivity of a number of minerals associated with the potash deposits over a frequency range of 10 MHz to 3 GHz using a commercially available material analyzer. Measurements were carried out on both synthetic and real samples. A cold compression technique in which mixed mineral powders were subject to pressures as high as 300 MPa was used to prepare the samples. The results of these measurements were then applied to predict the strength of GPR reflections that might be encountered in a real situation.
Language
English
DOI
doi:10.7939/R37S7J45F
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. 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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