Skip to main content

Science – Society – Technology

Geothermal Energy Cover Image

Table 1 Summary of the physical properties adopted in the sediment–basement model

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

  Min Max Mean
Sediment thermal conductivity (W m−1 K−1)
 Palaeogene–Permian 2.04 3.22 2.37
 Carboniferous–Devonian 2.25 2.98 2.68
Sediment heat production (μ Wm−3) 0.45 1.86 1.17
Basement thermal conductivity (W m−1 K−1)
 Non-granitic 2.03 4.43 3.06
 Granitic 2.88 3.65 3.3
Basement heat production (μ Wm−3)
 Non-granitic 0.3 3.0 1.46
 Granitic    5 km depth 10 km depth
  Southwest England    4.6 4.6
  Northern England    3.06 2.46
  Southern Uplands    1.87 1.5
  East Grampians    2.98 1.9
  Other Scottish    1.34 1.08
Basement density (kg m−3) 2270 3270 2800
Basement specific heat (J kg−1 K−1) 540 1347 887
  1. The methodology for the adoption of these properties across the grids of the model are described in the text. It should be noted that the thermal conductivities in the table are at laboratory temperatures and are corrected for temperatures at depth when attributed to the model