Table 1.

Density and thermal parameters assumed in the construction of the yield-strength envelopes

Density and thermal parameters
Rock unitDensity (kg m−3)Thermal conductivity (W m−1 K−1)Heat production (µW m−3)
Sediments22002.01.0
Crystalline crust28502.51.0
HVLC30002.50.3
Mantle3300*0
Serpentinized mantle3200*0
  • *Temperature-dependent thermal conductivity using the formulation of Xu et al. (2004) to define the lattice component and that of Hofmeister (1999) to define the radiative component (see also McKenzie et al. 2005).

  • HVLC, high-velocity lower crust (mafic).