Details of the abstract
| Title of paper |
Resistivity Models of Southwestern Canada: New insights into lithospheric structure, magma bodies, and geothermal systems |
| List of authors | Hanneson, C., Unsworth, M.J. |
| Affiliation(s) | University of Alberta, Department of Physics |
| Summary |
Three new 3-D resistivity models allow a fresh look at the lithospheric structure of southwestern Canada. The largest of these models is centred on the southeastern Canadian Cordillera and spans hundreds of kilometres. Another model is focused on the central Garibaldi volcanic belt. The final model surrounds the Mount Meager volcanic complex, an area that is currently in the early stages of geothermal development. The Cordillera model has a horizontal resolution of 5 km and extends to a depth of 400 km. It is the first regional-scale 3-D resistivity model of the southern Canadian Cordillera. This study focuses on crustal-scale resistivity anomalies including the southern Alberta-British Columbia conductor and the Canadian Cordilleran Regional conductor. It also investigates the transition from thin Cordilleran lithosphere to thick cratonic lithosphere, providing new insight into the deep structure of western North America. The Garibaldi model has a horizontal resolution of 1.5 km and extends to a depth of 40 km. This 3-D resistivity model is preliminary, but it includes conductors below Mount Meager and Mount Cayley. Additional fieldwork at Mount Cayley is scheduled for August 2022 and an update will be provided at EMIW. The Mount Meager model has a horizontal resolution of 0.25 km and extends to a depth of 20 km. Following two field campaigns in 2019 and 2020, this study builds on magnetotelluric results from the 1980s and early 2000s. This 3-D resistivity model provides a regional view around the geothermal target, including a potential magma body and associated deep hydrothermal systems. |
| Session Keyword | 4.0 Tectonics, Magmatism, Geodynamics |
| File upload |
4.0_resistivity_models_of_sou_hanneson.pdf
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