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TitleGeothermal exploration in the Burwash Landing region, Canada, using three-dimensional inversion of passive electromagnetic data
AuthorTschirhart, VORCID logo; Colpron, M; Craven, J; Hormozzade Ghalati, F; Enkin, R JORCID logo; Grasby, SORCID logo
SourceRemote Sensing vol. 14, issue 23, 2022 p. 1-22, Open Access logo Open Access
Alt SeriesNatural Resources Canada, Contribution Series 20220264
Mediapaper; digital; on-line
File formatpdf
NTS105C; 105D; 105E; 105F; 105K; 105L; 105M; 105N; 115A; 115B; 115G; 115H; 115I; 115J; 115O; 115P
AreaBurwash Landing
Lat/Long WENS-140.0000 -132.0000 64.0000 60.0000
Subjectsmagnetotelluric surveys; resistivity; magnetotelluric interpretations; geothermometry; Denali Fault; Remote sensing
Illustrationslocation maps; geological sketch maps; models; graphs; tables
ProgramGEM-GeoNorth: Geo-mapping for Energy and Minerals GEM Program Coordination
Released2022 11 25
AbstractSustainable development of Canada's North requires an increased focus on renewable, zero-emission energy sources. Burwash Landing in Yukon is prospective for geothermal energy based on a high geothermal gradient, local occurrence of warm groundwater and proximity to the active, crustal-scale Denali fault. Uncertainties about the potential geothermal system include the nature and geometry of fluid pathways, and heat sources required to drive a hydrothermal system. In this study, we inverted three passive electromagnetic datasets-321 extremely low frequency electromagnetic, 33 audiomagnetotelluric and 51 magnetotelluric stations-to map the subsurface electrical structure to 8 km depth. Our new model reveals vertical conductive structures associated with the two main faults, Denali and Bock's Creek, which we interpret to represent fluid-deposited graphite and hydrothermal alteration, respectively. Our model supports an interpreted releasing bend on the main Denali fault strand. This is associated with the deepest conductivity anomaly along the fault and potential for deeper penetration of fluids. Enigmatic conductive bodies from 1 to > 6 km depth are associated with intermediate to mafic intrusions. Fluids released from these bodies may advect heat and provide a possible heat source to mobilize hot fluids and sustain a geothermal system in the region.
Summary(Plain Language Summary, not published)
Inversion of passive electromagnetic data to understand the geothermal potential of Burwash Landing, Yukon.

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