Figure 30.1

Variation with depth of calculated: a. temperature; and b. geothermal gradient (A), and integral geothermal gradient (B) for a well in the Peace River Arch area.

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Figure 30.2

Distribution of heat generation () by the decay of radioactive elements at the top of the Precambrian basement beneath the Western Canada Sedimentary Basin.

Figure 30.3

Temperature distribution (°C) at the base of the sedimentary column (top of Precambrian) in the Western Canada Sedimentary Basin. In the southeast (around Lake Winnipeg) and in the northeast (around Great Slave Lake), formation temperatures are represented as point values rather than isotherms because of anomalous values, data scarcity and edge effects, which do not allow for proper contouring.

Figure 30.4

Distribution of the integral geothermal gradient (between the ground surface and the base of the sedimentary column) in the Western Canada Sedimentary Basin. Anomalously high values in the southeast (around Lake Winnipeg) and in the northeast (around Great Slave Lake) are represented as point values rather than isolines because of data scarcity and edge effects, which do not allow for proper contouring.

Figure 30.5

Distribution of basement heat flow in the Western Canada Sedimentary Basin.