Auscultation du pergélisol par méthodes géo-électriques : tomographie de polarisation provoquée, diagraphie et tomographie de résistivité électrique en forages
In Nunavik (Québec), frost-susceptible marine sediments were deposited along the coasts of Hudson Bay and Ungava Bay after their deglaciation and during the subsequent marine transgression. Following the postglacial emersion due to the isostatic uplift, the marine deposits came in contact with the c...
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fttriple:oai:gotriple.eu:http://hdl.handle.net/20.500.11794/29864 2023-05-15T16:35:25+02:00 Auscultation du pergélisol par méthodes géo-électriques : tomographie de polarisation provoquée, diagraphie et tomographie de résistivité électrique en forages Geo-electric permafrost auscultation: induced polarisation tomography, dideshy and electric resistivity tomography in drilling El Baroudi, Majid Fortier, Richard Québec (Province) 2018-01-01 https://hdl.handle.net/20.500.11794/29864 fr fre Université Laval http://hdl.handle.net/20.500.11794/29864 other CorpusUL geo envir Thesis https://vocabularies.coar-repositories.org/resource_types/c_46ec/ 2018 fttriple https://doi.org/20.500.11794/29864 2023-01-22T18:27:29Z In Nunavik (Québec), frost-susceptible marine sediments were deposited along the coasts of Hudson Bay and Ungava Bay after their deglaciation and during the subsequent marine transgression. Following the postglacial emersion due to the isostatic uplift, the marine deposits came in contact with the cold air and ice-rich permafrost formed in these deposits. Therefore, the Inuit communities located along the coasts of Nunavik may be built on ice-rich permafrost and their infrastructures may be vulnerable to permafrost degradation. This vulnerability may impact the sustainable development of these communities affecting the performance, maintenance costs and service life of their infrastructures. In answer to the needs of efficient permafrost investigation in cold regions engineering to avoid zones vulnerable or use mitigation method to permafrost degradation, the main goals of this doctoral research project are: 1) to assess a conceptual geocryological model of an ice-rich permafrost mound in the discontinuous permafrost zone in Nunavik from the interpretation of five cone penetration tests carried out in the mound, 2) taking into account the previous model and using the forward modelling approach in geophysics, to develop an innovative geophysical approach based on different geo-electrical methods for permafrost investigation, 3) to test this geophysical approach for the characterization of the previous ice-rich permafrost mound, and 4) to contribute to knowledge development on the geocryology of permafrost mounds in Nunavik. The study site is located in a deep valley near the Inuit community of Umiujaq along the east coast of Hudson Bay. Permafrost environments characteristic of Nunavik such as ice-rich permafrost mounds are found in this valley which is accessible from this community. The research methodology consists in using the forward modelling approach in geophysics taking into account the conceptual geocryological model of the studied ice-rich permafrost mound to design the geophysical investigation based ... Thesis Hudson Bay Ice inuit permafrost Umiujaq Ungava Bay Nunavik pergélisol Unknown Hudson Bay Nunavik Hudson Ungava Bay ENVELOPE(-67.489,-67.489,59.498,59.498) Umiujaq ENVELOPE(-76.549,-76.549,56.553,56.553) |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
French |
topic |
geo envir |
spellingShingle |
geo envir El Baroudi, Majid Auscultation du pergélisol par méthodes géo-électriques : tomographie de polarisation provoquée, diagraphie et tomographie de résistivité électrique en forages |
topic_facet |
geo envir |
description |
In Nunavik (Québec), frost-susceptible marine sediments were deposited along the coasts of Hudson Bay and Ungava Bay after their deglaciation and during the subsequent marine transgression. Following the postglacial emersion due to the isostatic uplift, the marine deposits came in contact with the cold air and ice-rich permafrost formed in these deposits. Therefore, the Inuit communities located along the coasts of Nunavik may be built on ice-rich permafrost and their infrastructures may be vulnerable to permafrost degradation. This vulnerability may impact the sustainable development of these communities affecting the performance, maintenance costs and service life of their infrastructures. In answer to the needs of efficient permafrost investigation in cold regions engineering to avoid zones vulnerable or use mitigation method to permafrost degradation, the main goals of this doctoral research project are: 1) to assess a conceptual geocryological model of an ice-rich permafrost mound in the discontinuous permafrost zone in Nunavik from the interpretation of five cone penetration tests carried out in the mound, 2) taking into account the previous model and using the forward modelling approach in geophysics, to develop an innovative geophysical approach based on different geo-electrical methods for permafrost investigation, 3) to test this geophysical approach for the characterization of the previous ice-rich permafrost mound, and 4) to contribute to knowledge development on the geocryology of permafrost mounds in Nunavik. The study site is located in a deep valley near the Inuit community of Umiujaq along the east coast of Hudson Bay. Permafrost environments characteristic of Nunavik such as ice-rich permafrost mounds are found in this valley which is accessible from this community. The research methodology consists in using the forward modelling approach in geophysics taking into account the conceptual geocryological model of the studied ice-rich permafrost mound to design the geophysical investigation based ... |
author2 |
Fortier, Richard |
format |
Thesis |
author |
El Baroudi, Majid |
author_facet |
El Baroudi, Majid |
author_sort |
El Baroudi, Majid |
title |
Auscultation du pergélisol par méthodes géo-électriques : tomographie de polarisation provoquée, diagraphie et tomographie de résistivité électrique en forages |
title_short |
Auscultation du pergélisol par méthodes géo-électriques : tomographie de polarisation provoquée, diagraphie et tomographie de résistivité électrique en forages |
title_full |
Auscultation du pergélisol par méthodes géo-électriques : tomographie de polarisation provoquée, diagraphie et tomographie de résistivité électrique en forages |
title_fullStr |
Auscultation du pergélisol par méthodes géo-électriques : tomographie de polarisation provoquée, diagraphie et tomographie de résistivité électrique en forages |
title_full_unstemmed |
Auscultation du pergélisol par méthodes géo-électriques : tomographie de polarisation provoquée, diagraphie et tomographie de résistivité électrique en forages |
title_sort |
auscultation du pergélisol par méthodes géo-électriques : tomographie de polarisation provoquée, diagraphie et tomographie de résistivité électrique en forages |
publisher |
Université Laval |
publishDate |
2018 |
url |
https://hdl.handle.net/20.500.11794/29864 |
op_coverage |
Québec (Province) |
long_lat |
ENVELOPE(-67.489,-67.489,59.498,59.498) ENVELOPE(-76.549,-76.549,56.553,56.553) |
geographic |
Hudson Bay Nunavik Hudson Ungava Bay Umiujaq |
geographic_facet |
Hudson Bay Nunavik Hudson Ungava Bay Umiujaq |
genre |
Hudson Bay Ice inuit permafrost Umiujaq Ungava Bay Nunavik pergélisol |
genre_facet |
Hudson Bay Ice inuit permafrost Umiujaq Ungava Bay Nunavik pergélisol |
op_source |
CorpusUL |
op_relation |
http://hdl.handle.net/20.500.11794/29864 |
op_rights |
other |
op_doi |
https://doi.org/20.500.11794/29864 |
_version_ |
1766025635527917568 |