Name: Undisturbed Ground Temperatures (° C )

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Description: This map layer illustrates the potential for geothermal energy across Canada. It includes two views: undisturbed ground temperature (shallow-resource potential) and deep geothermal-resource potential. The undisturbed ground temperature (UGT) for Canada is generated by a simplified correlation. The area covered by the map is from latitude 42°North to 68°North, since most geothermal applications are concentrated in this part of the country. The average error of the ground temperature is less than 1°C. It can be seen from this map that the contours of the ground temperatures indicate a regional variation ranging from −7°C (north) to 12°C (south). For the inhabited regions, the ground temperature ranges from 6 to 12°C. For the same latitudes, temperatures are generally higher in the west compared to the east. The distribution of deep geothermal resources for Canada was determined through regional mapping of geothermal gradients, depth-temperature profiles, and underlying geological regions to define reservoir types. Resource potential is divided by potential end use of the geothermal resource based on predicted temperatures of produced waters at reasonably economic drilling depths.

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Copyright Text: Grasby, S.E., Allen, D.M., Bell, S., Chen, Z., Ferguson, G., Jessop, A., Kelman, M., Ko, M., Majorowicz, J., Moore, M., Raymond, J., and Therrien, R., 2012. Geothermal energy resource potential of Canada; Geological Survey of Canada, Open File 6914, revised edition, 322 p.

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