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

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