Magnetotelluric imaging of the magmatic and geothermal systems beneath Mount Meager, southwestern Canada

Hanneson, Cedar; Unsworth, Martyn

doi:10.1139/cjes-2022-0136

Cited by 6 publications

(3 citation statements)

References 49 publications

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“…Our recent analysis (Hormozzade Ghalati et al., 2021, 2022) correlated a model derived from the AMT data set to the lithology and hydrothermal alteration based on temperature and geological logs. This model was also similar to that of Hanneson and Unsworth (2022) in the depth range where they overlapped. Hormozzade Ghalati et al.…”

Section: Introductionsupporting

confidence: 81%

“…Our recent analysis (Hormozzade Ghalati et al, 2021) correlated a model derived from the AMT data set to the lithology and hydrothermal alteration based on temperature and geological logs. This model was also similar to that of Hanneson and Unsworth (2022) in the depth range where they overlapped. Hormozzade Ghalati et al (2022) also provided possible interpretations of potential reservoir and caprock zones and suggested conduits toward thermal springs that could represent fracture networks.…”

supporting

confidence: 64%

“…Resistivity models derived from MT data can define subsurface structures based on surface measurements of natural perturbations in the Earth's electric and magnetic fields. Previous MT studies at Mount Meager defined a deep magma body beneath Mount Meager and its relationship to the potential geothermal system (Candy, 2001; Hanneson & Unsworth, 2022; Jones & Dumas, 1993). A more comprehensive audio‐magnetotelluric (AMT) data set was collected in 2019 (Craven et al., 2020) to study the structures in the top few hundred meters below the surface of the MMVC.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Fluid Flow Pathways in the Mount Meager Volcanic Complex, Southwestern Canada, Utilizing AMT and Petrophysical Data

Ghalati

Craven

Motazedian

et al. 2023

Geochem Geophys Geosyst

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Our understanding of factors that control fluid flow pathways plays a vital role in numerous disciplines including oil, gas, and geothermal exploitation, and 𝐴𝐴 CO2 sequestration studies (Fox et al., 2015;Jansen, 2011;Lepillier et al., 2019;Li, 2020). Fluid flow pathways are often controlled by permeable and porous material created by geological features such as fractures, joints, and faults (Hanano, 2000). Fracture and fault patterns dictate the flow distribution in reservoirs (Brown et al., 1999) and contribute to the convection of heat within geothermal systems (Hanano, 2000). Therefore, the knowledge of fracture and fault distribution is of great importance in modeling the viability of both natural and engineered geothermal systems (Li, 2020;Miranda et al., 2018).

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Section: Introductionsupporting

confidence: 81%

supporting

confidence: 64%

Section: Introductionmentioning

confidence: 99%

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Analysis of Fluid Flow Pathways in the Mount Meager Volcanic Complex, Southwestern Canada, Utilizing AMT and Petrophysical Data

Ghalati

Craven

Motazedian

et al. 2023

Geochem Geophys Geosyst

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Pleistocene to Holocene volcanism in the Canadian Cordillera

et al. 2023

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The Canadian Cordillera hosts numerous Pleistocene and Holocene volcanoes and volcanic deposits, including a number that have erupted within the last several hundred years. The nature and composition of volcanic edifices and deposits are diverse and dictated by the complex configuration of tectonic plates along the western margin of British Columbia and the thermal structure of the underlying mantle. Our modern knowledge of these is built upon more than a century of field- and increasingly, laboratory-based studies. We recognize five distinct volcanic domains within the Cordillera that are distributed across British Columbia, the Yukon Territory, and easternmost Alaska. These include: the Wrangell Volcanic Belt (WVB), the Northern Cordilleran Volcanic Province (NCVP), the Anahim Volcanic Belt (AVB), the Wells Grey - Clearwater Volcanic Field (WGCVF) and the Garibaldi Volcanic Belt (GVB) representing the northern extension of the Cascade Volcanic Arc. Volcanism in the Canadian Cordillera spans the full range of explosive to effusive behaviours, encompasses the suite of common volcanic chemical compositions (alkaline to calc-alkaline, nephelinite to peralkaline rhyolite), and is expressed by long-lived stratovolcanoes, shield volcanoes, and calderas, as well as shorter-lived tephra cones and associated lava flows. The range in tectonic settings (subduction to extension), eruption environments (subaerial-subaqueous-cryospheric), and topographic variability make volcanism within the Canadian Cordillera as diverse as anywhere on Earth, yet it is also the least studied. Here, we summarize the current state-of-knowledge concerning volcanism within the Canadian Cordillera and conclude with thoughts on research areas that merit further effort, namely glaciovolcanism and volcanic hazards.

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Assessing the relative threats from Canadian volcanoes

Kelman,

Wilson

2024

Can. J. Earth Sci.

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We assessed 28 Canadian volcanoes in terms of their relative threats to people, aviation, and infrastructure. The methodology we used was developed by the United States Geological Survey for the 2005 National Volcano Early Warning System. Each volcano is scored on multiple hazard and exposure factors, producing an overall threat score. The scored volcanoes are assigned to five threat categories, ranging from Very Low to Very High. We developed a knowledge uncertainty score to provide additional information about assessed threat levels; this does not affect the threat scoring. Two Canadian volcanoes are in the Very High threat category (Mt. Garibaldi and Mt. Meager). Three Canadian volcanoes are in the High threat category (Mt. Cayley, Mt. Price, and Mt. Edziza) and one volcano is in the Moderate threat category (Mt. Silverthrone). We compare the ranked Canadian volcanoes to volcanoes in the USA and assess current levels of monitoring against internationally recognized monitoring strategies. We find that even one of the best-studied volcanoes in Canada (Mt. Meager) falls significantly short of the recommended monitoring level and is currently monitored at a level commensurate with a Very Low threat edifice. All other Canadian volcanoes are unmonitored (apart from falling within a regional seismic network). This threat ranking has been used to prioritize hazard and risk assessment targets and to help select monitoring activities that will most effectively address the undermonitoring of Canadian volcanoes.

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Magnetotelluric imaging of the magmatic and geothermal systems beneath Mount Meager, southwestern Canada

Cited by 6 publications

References 49 publications

Analysis of Fluid Flow Pathways in the Mount Meager Volcanic Complex, Southwestern Canada, Utilizing AMT and Petrophysical Data

Analysis of Fluid Flow Pathways in the Mount Meager Volcanic Complex, Southwestern Canada, Utilizing AMT and Petrophysical Data

Pleistocene to Holocene volcanism in the Canadian Cordillera

Assessing the relative threats from Canadian volcanoes

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