The Alberta Geological Survey (AGS) contracted Multiphysics Imaging Technology, 4th Resource Corp., and GEOSEIS Inc. to estimate the Curie point depth (CPD) isotherm across Alberta using aeromagnetic data.
The CPD represents the depth at which crustal rocks reach approximately 580°C, the temperature at which ferromagnetic minerals lose their magnetization. Mapping this thermal boundary provides a regional proxy for crustal heat distribution, geothermal gradients, and mantle-derived heat flow, supporting geothermal resource evaluation and tectonic studies.
Residual magnetic intensity (RMI) grids were compiled from high-resolution airborne magnetic surveys acquired by the AGS (2021–2024), and supplemented with lower-resolution datasets from the Geological Survey of Canada and the U.S. Geological Survey.
The final reports and data are now publicly available, supporting geothermal, resource, and subsurface research initiatives across the province.
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