The search for brines: GPR markers, proxies, and challenges
GPR is one of the most applicable geophysical techniques to detect brines at shallow depths due to their peculiar electromagnetic characteristics, in particular related to overall high electrical conductivity. However, the range of chemical and physical parameters of brines is very wide and can chan...
Published in: | 18th International Conference on Ground Penetrating Radar, Golden, Colorado, 14–19 June 2020 |
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ftunitriestiris:oai:arts.units.it:11368/2980213 2023-05-15T14:00:24+02:00 The search for brines: GPR markers, proxies, and challenges Forte, Emanuele Dossi, Matteo Guglielmin, Mauro Society of Exploration Geophysicists Forte, Emanuele Dossi, Matteo Guglielmin, Mauro 2020 ELETTRONICO http://hdl.handle.net/11368/2980213 https://doi.org/10.1190/gpr2020-020.1 https://library.seg.org/doi/10.1190/gpr2020-020.1 eng eng Society of Exploration Geophysicists ispartofbook:SEG Global Meeting Abstracts 18th International Conference on Ground Penetrating Radar firstpage:73 lastpage:76 numberofpages:4 http://hdl.handle.net/11368/2980213 doi:10.1190/gpr2020-020.1 https://library.seg.org/doi/10.1190/gpr2020-020.1 info:eu-repo/semantics/closedAccess attenuation amplitude GPR aquifer permafrost info:eu-repo/semantics/conferenceObject 2020 ftunitriestiris https://doi.org/10.1190/gpr2020-020.1 2023-04-09T06:19:29Z GPR is one of the most applicable geophysical techniques to detect brines at shallow depths due to their peculiar electromagnetic characteristics, in particular related to overall high electrical conductivity. However, the range of chemical and physical parameters of brines is very wide and can change with time, thus making their imaging and characterization sometimes challenging. We analyze different GPR datasets collected in continental Antarctica, focusing on amplitude and spectral behavior, also calculating several GPR attributes to detect shallow brine ponds. We show that the geophysical signature of the brines is quite elusive, being sometimes characterized by clear strong reflectors, by extremely high attenuation of the GPR signal with a remarkable spectral shift, or by high scattering. Results are validated by ice coring, direct sampling, and by means of physical and chemical analyses of the brines. We demonstrate the existence of a relevant temporal and spatial variability of the brines, which requires integrated data analyses to achieve a robust GPR data interpretation. The integrated study of amplitude, frequency, and phase behavior is described in detail for different case studies, always trying to get general outcomes and site-independent interpretation criteria. Conference Object Antarc* Antarctica Ice permafrost Università degli studi di Trieste: ArTS (Archivio della ricerca di Trieste) 18th International Conference on Ground Penetrating Radar, Golden, Colorado, 14–19 June 2020 73 76 |
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Università degli studi di Trieste: ArTS (Archivio della ricerca di Trieste) |
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English |
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attenuation amplitude GPR aquifer permafrost |
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attenuation amplitude GPR aquifer permafrost Forte, Emanuele Dossi, Matteo Guglielmin, Mauro The search for brines: GPR markers, proxies, and challenges |
topic_facet |
attenuation amplitude GPR aquifer permafrost |
description |
GPR is one of the most applicable geophysical techniques to detect brines at shallow depths due to their peculiar electromagnetic characteristics, in particular related to overall high electrical conductivity. However, the range of chemical and physical parameters of brines is very wide and can change with time, thus making their imaging and characterization sometimes challenging. We analyze different GPR datasets collected in continental Antarctica, focusing on amplitude and spectral behavior, also calculating several GPR attributes to detect shallow brine ponds. We show that the geophysical signature of the brines is quite elusive, being sometimes characterized by clear strong reflectors, by extremely high attenuation of the GPR signal with a remarkable spectral shift, or by high scattering. Results are validated by ice coring, direct sampling, and by means of physical and chemical analyses of the brines. We demonstrate the existence of a relevant temporal and spatial variability of the brines, which requires integrated data analyses to achieve a robust GPR data interpretation. The integrated study of amplitude, frequency, and phase behavior is described in detail for different case studies, always trying to get general outcomes and site-independent interpretation criteria. |
author2 |
Society of Exploration Geophysicists Forte, Emanuele Dossi, Matteo Guglielmin, Mauro |
format |
Conference Object |
author |
Forte, Emanuele Dossi, Matteo Guglielmin, Mauro |
author_facet |
Forte, Emanuele Dossi, Matteo Guglielmin, Mauro |
author_sort |
Forte, Emanuele |
title |
The search for brines: GPR markers, proxies, and challenges |
title_short |
The search for brines: GPR markers, proxies, and challenges |
title_full |
The search for brines: GPR markers, proxies, and challenges |
title_fullStr |
The search for brines: GPR markers, proxies, and challenges |
title_full_unstemmed |
The search for brines: GPR markers, proxies, and challenges |
title_sort |
search for brines: gpr markers, proxies, and challenges |
publisher |
Society of Exploration Geophysicists |
publishDate |
2020 |
url |
http://hdl.handle.net/11368/2980213 https://doi.org/10.1190/gpr2020-020.1 https://library.seg.org/doi/10.1190/gpr2020-020.1 |
genre |
Antarc* Antarctica Ice permafrost |
genre_facet |
Antarc* Antarctica Ice permafrost |
op_relation |
ispartofbook:SEG Global Meeting Abstracts 18th International Conference on Ground Penetrating Radar firstpage:73 lastpage:76 numberofpages:4 http://hdl.handle.net/11368/2980213 doi:10.1190/gpr2020-020.1 https://library.seg.org/doi/10.1190/gpr2020-020.1 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1190/gpr2020-020.1 |
container_title |
18th International Conference on Ground Penetrating Radar, Golden, Colorado, 14–19 June 2020 |
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73 |
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76 |
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