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TitleHelicopter time-domain EM Results over Brandon Channel and Assiniboine Delta aquifers, Brandon, Manitoba
AuthorLegault, J M; Toop, D; Oldenborger, G A; Plastow, G; Bournas, N; Han, Z; Orta, M
SourceSymposium on the Application of Geophysics to Environmental and Engineering Problems, extended abstracts; 2015 p. 1-6
Year2015
Alt SeriesEarth Sciences Sector, Contribution Series 20140275
PublisherEnvironmental and Engineering Society
MeetingSymposium on the Application of Geophysics to Environmental and Engineering Problems; Austin; US; March 22-26, 2015
Documentbook
Lang.English
Mediapaper
File formatpdf
ProvinceManitoba
NTS62G/13
AreaBrandon; Shilo
Lat/Long WENS-100.0000 -99.5000 50.0000 49.7500
Subjectsgeophysics; hydrogeology; groundwater; groundwater regimes; groundwater resources; aquifers; e m surveys; models; modelling; shales; sands; gravels; Brandon Channel Aquifer; Assiniboine Delta Aquifer
Illustrationslocation maps; profiles
ProgramAquifer Assessment & support to mapping, Groundwater Geoscience
AbstractVTEM helicopter time-domain EM survey results over the Brandon Channel and Assiniboine Delta aquifers, near Brandon, Manitoba, have been studied using unconstrained layered earth modeling. The resistive sand and gravel layers are distinguished from the more conductive shale basement and reveal localized thickening from blind gravel channels cut into its floor. They further distinguish a lower aquifer separated by a conductive clay layer from shallow sands of the Assiniboine Alluvial aquifer and the Assiniboine Delta Aquifer. The Brandon Channel aquifer is delineated, to the northwest and east of the city where it splits into a main south channel and smaller north channel. The western extent of Assiniboine Alluvial aquifer is defined and evidence for the Pierson Valley aquifer extending west from Brandon is also indicated.
Summary(Plain Language Summary, not published)
Buried valley aquifers are important sources of groundwater in Canada¿s prairies. Manitoba buried valley aquifers have been difficult to define because they are eroded and hidden within thick glacial overburden. Recent investigations of the Spiritwood Valley aquifer by the Geological Survey of Canada have demonstrated value of helicopter time domain EM surveys. In 2013, Manitoba Conservation and Water Stewardship commissioned a similar helicopter EM survey of the Brandon Channel aquifer. The Brandon Channel aquifer is an important source of water for local industry, but the boundaries of the aquifer, its internal structure and water bearing zones remained enigmatic. Results reveal the boundaries of the Brandon Channel. They further distinguish a lower aquifer separated by a clay layer from shallow sands of the Assiniboine Delta Aquifer. Evidence for the Pierson Valley extending west from Brandon is also indicated.
GEOSCAN ID295481