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Table 2 Available heat or heat in place, within the basement for the depth range 3.5–9.5 km

From: Assessment of the resource base for engineered geothermal systems in Great Britain

Depth slice (km) Heat content (EJ) tabulated by temperature at depth
150  C 200 °C 250 °C 300 °C 350 °C 400 °C 450 °C
3.5 1424 0 0 0 0 0 0
4.5 17,616 1335 0 0 0 0 0
5.5 29,526 7856 713 0 0 0 0
6.5 10,990 38,112 4257 404 0 0 0
7.5 3750 44,936 16,463 2760 214 0 0
8.5 816 28,581 43,598 7112 1636 42 0
9.5 75 6848 61,542 21,736 4038 813 6
  1. Heat contents, in EJ, are binned as ±25 °C around the central temperature, i.e. heat contents greater than or equal to 175 °C and less than 225 °C are binned as 200 °C. The available heat in place for Great Britain is 357,197 EJ