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Table 2 Summary of the physical parameters for viscoelastic flow

From: Frictional and structural controls of seismic super-cycles at the Japan trench

Oceanic asthenosphere
Background strain rate\({\dot{\varepsilon }}^0_{22}\)\(-10^{-14}\) \(\hbox {s}^{-1}\)
Basal mantle temperature\(T_0\)1380 \(^\circ\)C
Pre-factorA90 \(\hbox {MPa}^{-n} \hbox {s}^{-1}\) (ppm H/Si)\(^{-r}\)
Power law stress exponentn3.5
Activation energyE510 kJ/mol
Activation volume\(\Omega\)13 \(\hbox {cm}^3\)/mol
Water content\(C_\text {OH}\)1000 ppm H/Si
Water content exponentr1.2
Thermal agea120 Myr
Mantle wedge
Background strain rate\({\dot{\varepsilon }}^0_{22}\)\(-10^{-14}\) \(\hbox {s}^{-1}\)
Basal mantle temperatureT1380 \(^\circ\)C
Pre-factor below arcA90 \(\hbox {MPa}^{-n}\hbox {s}^{-1}\) (ppm H/Si)\(^{-r}\)
Pre-factor offshoreA27 \(\hbox {MPa}^{-n}\hbox {s}^{-1}\) (ppm H/Si)\(^{-r}\)
Power law stress exponentn3.5
Activation energy below arcE490 kJ/mol
Activation energy offshoreE510 kJ/mol
Activation volume\(\Omega\)11 \(\hbox {cm}^3\)/mol
Water content below arc\(C_\text {OH}\)4000 ppm H/Si
Water content offshore\(C_\text {OH}\)1000 ppm H/Si
Water content exponentr1.2
Thermal agea53 Myr
  1. The thermal model is based on a cooling half-space with a thermal age a and a basal temperature \(T_0\), where the top of the slab is the reference depth, to account for advection. The mantle wedge is cooled as a function of proximity to the down-going slab, following the perturbation \(\Delta T\,e^{-z/z_0}\), where \(\Delta T=-900^\circ\)C, z is the distance to the slab, and \(z_0=25\,\)km