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Table 1 Physical properties of rocks

From: A possible mechanism for spontaneous cyclic back-arc spreading

  Reference density*1 Reference temperature*1 Reference pressure*1 Thermal expansion*2 Compressibility *3 Thermal conductivity *2 Radioactive heating*4
ρ0 T0 P0 α β k Hr
kg/m3 K MPa 10–5/K 10–11/Pa W/m/K μW/m3
Continental upper crust 2700 273 0.1 2.6 1 2.5 1.3
Continental lower crust 2900 273 0.1 2.6 1 2.5 0.27
Oceanic crust 3000–3300*5 273 0.1 2.6 1 2.5 0.27
Mantle wedge 3512 1740 13,500 3.0 0.7 3.1 0
Upper mantle 3532 1740 13,500 3.0 0.7 3.1*6 0
Upper mantle for SP*7 3532 1740 13,500 3.0 0.7 3.1 0
Transition zone 3650 1740 13,500 2.3 0.45 4.0 0
Lower mantle 3984 1850 23,000 2.0 0.25 6.0 0
  1. *1 Modified from Faccenda and Dal Zilio (2017) according to density distribution of the present model
  2. *2 Tosi et al. (2013)
  3. *3 Turcotte and Schubert (2002)
  4. *4 Peacock and Wang (1999)
  5. *5 Linearly increase with the depth of 15–60 km to incorporate the effect of eclogitization
  6. *6 Eq. 6 is applied for z > 20 km to incorporate the effect of heat transport due to fluid and/or melt migration
  7. *7 Upper mantle for subducting plate (purple in Fig. 1b and 2)